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List of JavaScript Kata to Update

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JohanWiltink edited this page Dec 24, 2021 · 302 revisions

This page lists JavaScript kata still stuck in Node 8.x. It's not grouped in any way at the moment.

Any help is appreciated, but I'm still looking for ways to automate common fixes. jscodeshift can be used to transform the code (see example). If you come up with a codemod, please create a similar demo on AST explorer and let me know on https://github.com/codewars/runner/issues/119. That issue also includes some background information.

Since Node 10.x, we've been using Mocha instead of the custom test framework. There are some required changes related to this.

  • The test structure must be describe -> it -> assertions. Invalid test structure might still appear as valid. Automated updates have skipped over those with invalid structure.
  • Test case callback passed to it is no longer immediately executed. This can be tricky to notice.
    • To avoid common issue with closure within a loop, all var within all tests have been upated to let when possible (if tests passed after the change).
  • Test case defined with a callback. Some authors likes to write it("test", _ => {}) which creates a asynchronous test (it("test", (done) => { doStuff().on("end", done); })). Most of these have been fixed.
  • Old assertions are still available in Node 10. It's also available in Node 12 with const Test = require("@codewars/test-compat");. Updating to Chai assertions can be done later with codemod, so it can be skipped.

Use the new "Fork" feature to update kata:

You don't need to open an issue/suggestion and wait to edit. Forking a kata in a language is similar to forking an approved translation, but better because

  • all languages can be forked, including those added directly in Kata Editor and the original language
  • it's never outdated because it forks from the kata

You should see "Fork" when viewing a kata with the language you've completed in selected. Click that to open a translation editor with the current version filled in. The proposed changes can be merged or rejected after publishing, just like translations.

List of Node 8.x Kata

  1. Calculate Fibonacci return count of digit occurrences
  2. -Convert it, quickly!
  3. -Reverse it, quickly!
  4. 'x' marks the spot.
  5. "AURUM RECLUDIT CUNCTA"
  6. "console.log" and the Lexical "this"
  7. "string".forEachMatch(regex, callback, [context]);
  8. "this" is an other problem
  9. "this" is an other solution
  10. "TRaduttore".tr( [ "u", "tt" ] , "it" )
  11. (Insane) N Warriors and a Lamp
  12. (Ready for) Prime Time
  13. [AI] Play Me : CodeWarsRunner I (Introduction)
  14. [AI] Play Me : CodeWarsRunner II (Acceleration)
  15. [BF] Even or Odd?
  16. [BF] Fibonacci Sequence
  17. [BF] Hello World!
  18. [BF] Quine
  19. [BF] Reverse input
  20. [BF] Sort string
  21. [BF] Squares
  22. [Geometry A-1] Locate point - to the right, to the left or on the vector?
  23. [Geometry A-2]: Length of a vector
  24. /* Strip my Comments */
  25. # Counting 1: I Want Some Subsets, Not All!
  26. #For Kids# Date decryption.
  27. #For Kids# Date encryption.
  28. #01 - Music theory - Minor/Major chords
  29. #1 Sequences: Pure Even Digit Perfect Squares (P.E.D.P.S)
  30. #4 Matrices: Process for a Square Matrix
  31. #6 Matrices: How Many Matrices Do These Elements Produce?
  32. #7 Matrices: Focused on the Contour
  33. #8 Matrices: Up and Down Sorting For Each Column
  34. +1 Array
  35. 1 Two 3 Four 5!
  36. 1's, 0's and wildcards
  37. 1RM Calculator
  38. 1st day of month that are Sunday in a year range
  39. 2 DNAs sequences, coding for same protein?
  40. 2048!
  41. 254 shades of grey
  42. 5 without alphanums!!!
  43. 5command - Esoteric programming #1
  44. 5x5 Tap Code
  45. 7-segment converter
  46. 8 inch pizza equivalence
  47. 80's Kids #1: How Many Licks Does it Take?
  48. 80's Kids #10: Captain Planet
  49. 80's Kids #2: Help ALF Find His Spaceship
  50. 80's Kids #3: Punky Brewster's Socks
  51. 80's Kids #4: Legends of the Hidden Temple
  52. 80's Kids #5: You Can't Do That on Television
  53. 80's Kids #6: Rock 'Em, Sock 'Em Robots
  54. 80's Kids #7: She's a Small Wonder
  55. 80's Kids #8: The Secret World of Alex Mack
  56. 80's Kids #9: Down in Fraggle Rock
  57. 8kyu interpreters: HQ9+
  58. A (no more) bugs trilogy: Episode 2 - An Array of Tasks
  59. A (no more) bugs trilogy: Episode 3 - Make a Player
  60. A Banking Trouble
  61. A bugs trilogy: Episode 1 - "Let Math.Random(); decide your future"
  62. A Crazy Robot? Who's is behind the scenes to make that?
  63. A for Apple
  64. A functional deck of cards....
  65. A kata is a kata, you can't say it's only a half!
  66. A Knight's Tour
  67. A Letter from Your Niece
  68. A Man and his Umbrellas
  69. A Memory game array
  70. A Promise is a Promise
  71. A simple Tic-tac-toe class
  72. A Taste of Curry
  73. Aaaaaand theeeeeen
  74. ABC - Esoteric programming #2
  75. Abstract Model Magic
  76. Accumulator Calculator
  77. ACME factory needs your help
  78. Acute, Obtuse, or Right?
  79. AD2070: Help Lorimar troubleshoot his robots- ultrasonic distance analysis
  80. AD2070: Help Lorimar troubleshoot his robots-Search and Disable
  81. Ada goes to coding bootcamp
  82. Add commas to long numbers
  83. Add Length
  84. Add new item (collections are passed by reference)
  85. Adding Arrays
  86. Adding Big Numbers
  87. Adding Binary Numbers
  88. Adding useful functional functionality to JavaScript arrays
  89. Addition with Limitations
  90. Additionless addition.
  91. Additive Numbers
  92. Advanced Events
  93. After(?) Midnight
  94. Age Range Compatibility Equation
  95. Alex & snooker: points earned.
  96. Alex & snooker: scores.
  97. Alfred's Laundry Robot
  98. Algebraic Lists
  99. Aliens have landed
  100. All Balanced Parentheses
  101. All Inclusive?
  102. All representations as binomial coefficient, or: How often in Pascal's Triangle ?
  103. All Star Code Challenge #12
  104. All Star Code Challenge #17
  105. All Star Code Challenge #18
  106. All Star Code Challenge #25
  107. All Star Code Challenge #32
  108. All that is open must be closed...
  109. All unique
  110. Alphabet symmetry
  111. Alphabetic Anagrams
  112. Alphabetical Sequence
  113. Alphabetize a list by the nth character
  114. Alphametics Solver
  115. Alternate capitalization
  116. Alternate Square Sum
  117. altERnaTIng cAsE <=> ALTerNAtiNG CaSe
  118. Alternating Loops
  119. Alternating Operations On A Nested Array
  120. Alternative Truth Machine
  121. Am I safe to drive?
  122. Amidakuji
  123. Amount to Coins - Universal
  124. An 'orrible expression on 'is face
  125. An Eventful Bus
  126. Anagram difference
  127. And the Mosckar goes to…
  128. Angle Between Clock Hands
  129. Angle-a-trons and Phyllotaxy
  130. Angular modules
  131. Anonymous Returns.
  132. Answering questions about data with Lo-Dash - 1
  133. Antipodal Points with Same Temperature
  134. AOP - After
  135. AOP - Around
  136. AOP - Before
  137. Apparently-Modifying Strings
  138. Apply offset to subtitles
  139. Approving Kata
  140. Approximate Fractions
  141. Arbitrary-Length Integer Arithmetic
  142. Are arrow functions odd?
  143. Are the values equal?
  144. Are there any arrows left?
  145. Are they the "same"?
  146. Are we alternate?
  147. Are You a One-Liner? #1: divide 2,3,5,7
  148. Are You a One-Liner? #2: multiplication table
  149. Are You a One-Liner? #3: A4 Paper
  150. Are you Geometric or Arithmetic? No, I´m both of them.
  151. Area and perimeter of the ellipse
  152. Area of a Circle
  153. Area of a Square
  154. Area of House from Path of Mouse
  155. Area or Perimeter
  156. Arguments to Binary addition
  157. Arithmetic progression
  158. Armstrong Number
  159. Around Fibonacci: chunks and counts
  160. Array combinations
  161. Array Deep Count
  162. Array element parity
  163. Array Graphics - Lines
  164. Array Info
  165. Array of Morse, find unique and dublicate elements
  166. Array power
  167. Array reduction
  168. Array to HTML table
  169. Array.isArray
  170. Array.prototype.push
  171. Array.prototype.splice(from, count, insertItems...)
  172. Array.prototype.splice(from, count, insertItems...) - Advanced
  173. Arrays are Objects
  174. Arrays of cats and dogs
  175. Arrays of Lists of Sets
  176. Article archive and social likes
  177. Ascii Art Generator
  178. ASCII Games: Dance Dance Evolution I
  179. ASCII Games: Flood Fill (Player)
  180. ASCII Games: Warning: Ice!
  181. ASCII hex converter
  182. ASCII letters from Number
  183. ASCII Shift Encryption/Decryption
  184. Assembler interpreter (part II)
  185. Assignment #3
  186. Assorted Rectangular Pieces Puzzle
  187. Atbash Cipher
  188. Atbash Cipher Helper
  189. ATM Heist
  190. Authenticate a list of usernames
  191. Auto Sorted Array - Easy
  192. Autocomplete! Yay!
  193. Automaton (Part 1)
  194. Automaton (Part 2)
  195. Automaton (Part 3)
  196. Automorphic Number (Special Numbers Series #6)
  197. Average Scores
  198. Average value of squared even positive integers array
  199. Back to KinderGarten (eeeeeeasy)
  200. Back to KinderGarten 3 : What's this list ? (easy?)
  201. Back to KinderGarten II : Where's Aïcha ? (eeeasy)
  202. Back to the Future?
  203. Backspaces in string
  204. Balance the arrays
  205. Balance the parentheses
  206. Balance the tree
  207. Balanced ()
  208. Ball Launcher Robot
  209. Ball Roll On Quartic Polynomial
  210. Bank Robbery
  211. Bar Graph - Graphing #1
  212. Barbell racking calculator
  213. Barbell weight
  214. Base64 Encoding
  215. Baseball
  216. Basic Compression
  217. Basic JS - Building a calculator
  218. Basic JS - Calculating averages
  219. Basic markdown to HTML
  220. Basic neural networks - Machine Learning #2
  221. Basic Training: Add item to an Array
  222. Basics - Generators #1
  223. Basics 04: Rotate Matrix
  224. Basket of Fruits
  225. Batman Quotes
  226. Battle of the characters (Easy)
  227. Battle of the characters (Medium)
  228. Bầu cua tôm cá
  229. BBQ Pitmaster
  230. Be Concise I - The Ternary Operator
  231. Be Concise II - I Need Squares
  232. Be Concise III - Sum Squares
  233. Be Concise IV - Index of an element in an array
  234. Beam me up Statey using ReactJS
  235. Beats by Dr. Dre
  236. Beautiful STAR
  237. BECOME IMMORTAL
  238. Beeramid
  239. Begin your day with a challenge, but an easy one.
  240. Beginner Series #2 Clock
  241. Behind Enemy Lines
  242. Berlin Clock
  243. Berserk rater: CG Vs. Clang
  244. Bet payout calculator
  245. Bicycle gear inch calculator
  246. Big Arithmetic - integer add/subtract
  247. Big Integer Modulo
  248. Big integers sum
  249. Big number problem
  250. Big Vocabulary
  251. Bill Gates' Percentage Calculator
  252. Bin to Decimal
  253. Binary Genetic Algorithms
  254. Binary scORe
  255. Binary string
  256. Binary Swap
  257. Binary sXORe
  258. Binary to string
  259. Binary Zoo
  260. Binding within the List Monad
  261. BIO 2013 : Watching the Clock
  262. bit "Wise" #1: XOR-cism
  263. bit "Wise" #2: SHIFT-iness
  264. Bit calculator
  265. Bit Plane Return
  266. BitMath: Addition
  267. BitMath: Multiplication
  268. Bitty Words
  269. Blobservation
  270. Block-exchanging reverse
  271. Bloxorz Solver
  272. Boardgame Fight Resolve
  273. Bob - The Automated Manager
  274. Bob's Secret Cipher
  275. Body Mass Index (BMI) calculator
  276. Body mass index calculation
  277. Boggle Word Checker
  278. Boolean logic from scratch
  279. Bored Board Designer
  280. Born to be chained
  281. Bouncing Ball
  282. Braces status
  283. Bracket Duplicates
  284. Brainscrambler - Esoteric programming #3
  285. Branch Prediction
  286. Breadcrumb Generator
  287. Breadth-First DOM Traversal
  288. Bribe the Guards of the Crown Jewels
  289. Brick pyramid.
  290. Broken Image - Puzzles #1
  291. Broken scales
  292. Broken sequence
  293. Brownrw8's "for" loop
  294. Build a pile of Cubes
  295. Build a Trie
  296. Building a mini search engine
  297. Building a Sequence Cocatenating Digits with a Given Order.
  298. Building blocks
  299. Building Strings From a Hash
  300. Bulk up!
  301. Burrows-Wheeler transform I. Coding
  302. Burrows-Wheeler transform II. Decoding
  303. Buying a car
  304. Buying the Farm : Irrigation
  305. By the Power Set of Castle Grayskull
  306. Caesar Cipher Encryption - Variation
  307. Caesar Cipher Helper
  308. Caffeine Script
  309. Calculate age in years
  310. Calculate Factor
  311. Calculate Hypotenuse of Right-angled Triangle
  312. Calculate mean and concatenate string
  313. Calculate number of inversions in array in linearithmic time
  314. Calculate Price Excluding VAT
  315. Calculate Pyramid Height
  316. Calculate String Rotation
  317. Calculate the bearing angle angle between two points
  318. Calculate the required interest rate
  319. Calculate Two People's Individual Ages
  320. Calculating Expected Utility
  321. Calculating with Functions
  322. Calculating with objects
  323. Calculator (Addition and Spaces) [Part 1]
  324. Calendar Week
  325. Call The Knights!
  326. Callback Set
  327. Cambridge Word Scramble
  328. CamelCase Method
  329. Can I have cake?
  330. Can Santa save Christmas?
  331. Can you create an Ouroboros?
  332. Can you get the loop ?
  333. Can you keep a secret?
  334. Can you move to Zephland?
  335. Can you test it for me?
  336. Candy count
  337. Candy problem
  338. Canvas Fun #1: Draw Lines
  339. Canvas Fun #2: Draw Rectangles
  340. Canvas Fun #3: Draw Screen Unlock Pattern
  341. Canvas Fun #4: Warning! Traffic Light Ahead!
  342. Canvas Fun #5: Count The Smiling Face
  343. Capital Words!
  344. Capitalize first letter of a string
  345. Capitals first!
  346. Car Door Roulette - Easy Version
  347. Car Door Roulette - Harder Version
  348. Card Counting
  349. Card game
  350. Card game: twenty-one
  351. Cartesian coordinates from degree angle
  352. Cartesian neighbors
  353. Cartesian neighbors distance
  354. Case Reversal of Consecutive Duplicates
  355. Case Sensitive
  356. Case swapping
  357. Catch me if you can (rolling start)
  358. Cells states
  359. Centroid I
  360. Chain calculator
  361. Champernowne's Championship
  362. Change it up
  363. Changing letters
  364. Char shuffle
  365. char_to_ascii
  366. Character Concatenation
  367. Character frequency
  368. Character Frequency
  369. Character limits: How long is your piece of string?
  370. Cheating a bit...
  371. Check a Curious Divisibility. (Brute force version)
  372. check for winning box in dots and boxes game
  373. Check if a triangle is an equable triangle!
  374. Check if number is prime without loops
  375. Check if two words are isomorphic to each other
  376. Check RNA Nucleotides
  377. Check three and two
  378. Check your arguments
  379. Checkerboard King Combo Move
  380. Chess - checkmate with rook in 16 moves
  381. Chess piece values
  382. Chessboard Squares Under Queen's Attack
  383. Chicken Sexing
  384. Chinese Zodiac
  385. chmod calculator in octal.
  386. Chocolate Celebration
  387. Chocolate Party
  388. Choose featured projects for Gratipay's homepage!
  389. Christmas baubles on the tree
  390. Chuck Norris I - Push Ups
  391. Chuck Norris II - One Punch
  392. Chuck Norris VI - Shopping with Chuck
  393. Chuck Norris VII - True or False? (Beginner)
  394. Church numbers
  395. Church Numbers - Add, Multiply, Exponents
  396. Church numbers (ii)
  397. Cipher
  398. Circular Objects #1 - Running around in circles
  399. Class conundrum - Bug Fixing #7
  400. Classy Classes
  401. Classy Extentions
  402. Classy Polynomials (Part 1)
  403. Clay Pigeon Shooting
  404. Clean up your Gibberish!
  405. Clean your shoes rack
  406. Climb Time - Can you send it?
  407. Climbing the Leaderboard
  408. Clock Hands
  409. Clock Patience
  410. Closest and Smallest
  411. Closest elevator
  412. Closest friends
  413. Closest Perfect Power
  414. Closest to Zero
  415. Clue - Esoteric programming #4
  416. Code Adventurer Guild: BeiJing
  417. Code Adventurer Guild: HongKong
  418. Code-ilocks. This exercise is JUST RIGHT!
  419. Codewars Leaderboard Climber
  420. Codewars style ranking system
  421. Coding 3min : A*B=C
  422. Coding 3min : Are they symmetrical?
  423. Coding 3min : Balance Attraction
  424. Coding 3min : Count animals
  425. Coding 3min : Eat watermelon
  426. Coding 3min : Excel Puzzle #1
  427. Coding 3min : Excel Puzzle #2
  428. Coding 3min : Find the murderer
  429. Coding 3min : Guess the Hat
  430. Coding 3min : Hacker and change
  431. Coding 3min : Half it II
  432. Coding 3min : Half it III
  433. Coding 3min : Half it IV
  434. Coding 3min : Max Value
  435. Coding 3min : Parallel circuit
  436. Coding 3min : Planting Trees
  437. Coding 3min : Reading a Book
  438. Coding 3min : Remove screws I
  439. Coding 3min : Remove screws II
  440. Coding 3min : Series circuit
  441. Coding 3min : Tidy up the room
  442. Coding 3min : toLoverCase()
  443. Coding 3min : Waiting for a Bus
  444. Coding 3min: Bug in Apple
  445. Coding 3min: Collatz Array(Split or merge)
  446. Coding 3min: Father and Son
  447. Coding 3min: Give me the equation
  448. Coding 3min: Trypophobia
  449. Coding Meetup #10 - Higher-Order Functions Series - Create usernames
  450. Coding Meetup #15 - Higher-Order Functions Series - Find the odd names
  451. Coding with Squared Strings
  452. Collapse spaces and url encode (no regex or trim)
  453. Collatz
  454. Collatz Conjecture (Recursive)
  455. Collatz Conjecture Length
  456. Collision Detection
  457. Collision Detection: Circle-Circle
  458. Color Ghost
  459. Color of the moment
  460. Colored Hexes!
  461. Colour Association
  462. Coloured Lattice Points Forming Coloured Triangles
  463. Combine objects
  464. Combining Records
  465. Common array elements
  466. Common Bit Twiddles
  467. Compact data processing: bit comparison
  468. Compare powers
  469. Compare within margin
  470. Competitive eating scoreboard
  471. Complete The Pattern #10 - Parallelogram
  472. Complete The Pattern #11 - Plus
  473. Complete The Pattern #12
  474. Complete The Pattern #13
  475. Complete The Pattern #14
  476. Complete The Pattern #15
  477. Complete The Pattern #16
  478. Completed Mahjong Hands
  479. Complex numbers
  480. Composed Integers Having Prime Factors Only Once
  481. Composing squared strings
  482. Compound Nouns, Common Nouns, and Adjectives Test
  483. CompoundArray
  484. Compression : impossible
  485. Computational Geometry 101: Perimeter and Area of an arbitrary shape (2D)
  486. Compute a convex hull
  487. Compute the Largest Sum of all Contiguous Subsequences
  488. Compute Unix path
  489. Concatenating functions
  490. Concatenation substring
  491. Conference Traveller
  492. Config Parsing: INI
  493. Configure an express server
  494. Connect Four
  495. Connect Four: Unlimited Edition
  496. Connected blocks
  497. Connected blocks (second part)
  498. Consecutive Count
  499. Consecutive k-Primes
  500. Consecutive letters
  501. Consecutive strings
  502. Conservative Property Proxy
  503. Consonant value
  504. Constrained GCD
  505. Contact Deduplication
  506. Contamination #1 -String-
  507. Control the Beast (controlled components in ReactJS)
  508. Convert a linked list to a string
  509. Convert a Number to money!!
  510. Convert an array of strings to array of numbers
  511. Convert Hash To An Array
  512. Convert me to an Array of Numbers =)
  513. Convert PascalCase string into snake_case
  514. Convert Sentences to New York, my guy.
  515. Convert the score
  516. Converter
  517. Converting integer to currency format
  518. Conway's Game of Life
  519. Conway's Game of Life - Unlimited Edition
  520. Cookie Creator
  521. Coordinates Validator
  522. Coprimes up to N
  523. Cost of Shopping
  524. Count all the sheep on farm in the heights of New Zealand
  525. Count chains of ones in subsequences
  526. Count letters in string
  527. Count non-decreasing nodes in a binary tree
  528. Count Repeat Times of Array
  529. Count the Characters
  530. Count the Combinations
  531. Count the connected components
  532. Count the divisible numbers
  533. Count the number of cubes with paint on
  534. Count the Ones
  535. Count the smiley faces!
  536. Count The Zeros: 1 to n
  537. Count word occurrences
  538. Countdown - Longest Word
  539. Countdown to Christmas
  540. Counting DNA Nucleotides
  541. Counting Duplicates
  542. Counting E-Primes
  543. Counting in English one, two, three... to 2 Quadrillion (2,000,000,000,000,000)
  544. Counting Nested Functions
  545. Counting power sets
  546. Counting Sort
  547. Counting String Subsequences
  548. Covfefe
  549. Cracking CRC32
  550. Crash Override
  551. Crashing Boxes
  552. Cream of the crop
  553. Create 10x10 array and randomly fill each cell with "A", "B", "C", or "D"
  554. Create a frame!
  555. Create a House Cleaning Rota
  556. Create a password hashing function.
  557. Create an Evaluator Function Creator
  558. Create Four Letter Birding Codes from Bird Names
  559. Create palindrome
  560. Create the base - Dungeon crawler #1
  561. Create Your Own "Promise.all()"
  562. Creating Elements with React
  563. Creating the Matrix (AKA Binary block)
  564. Credit Card Checker
  565. Cross the Bridges
  566. Crossed words
  567. Crouching Distribution, Hidden Constant
  568. Crushing blows and blushing crows
  569. Cryptic Cave: Episode 1
  570. Cryptography Challenge - Log of Lights
  571. CSV representation of array
  572. CTCI 1.4 Palindrome Permutation
  573. CTCI 1.5 One Away
  574. Cube-powerful
  575. CubeSummation
  576. Currency Conversion
  577. Currying functions: multiply all elements in an array
  578. Custom Array Filters
  579. Custom concat() Array Method
  580. Custom each() Array method
  581. Custom Setters and Getters
  582. Cut array into smaller parts
  583. Cut me in Pieces but in The Way I Like
  584. Cycle a list of values
  585. D&D Character generator #1: attribute modifiers and spells
  586. D&D Character generator #2: psion power points
  587. D&D Character generator #3: carrying capacity
  588. Dana White needs your help... Can you help the UFC?
  589. Dangerous Dates
  590. Dashatize it
  591. dataTypes String to Array
  592. Date Format Validation
  593. Date formatter
  594. Date Sanity Methods
  595. Dave's gamble.
  596. Days in the year
  597. Death Star Construction
  598. Debug Sum of Digits of a Number
  599. Debug Tic-Tac-Toe Checker
  600. Decibel Scale
  601. Decimal to binary converter
  602. Decimal to Factorial and Back
  603. Decipher the Message
  604. Decipher this!
  605. Decode Morse
  606. Decode the Morse code
  607. Decode the Morse code, advanced
  608. Decode the Morse code, for real
  609. Decoded String by the Numbers
  610. Decompose double strand DNA into 6 reading frames
  611. Decreasing Inputs
  612. Decrypt this school cipher
  613. Deep Assignment
  614. Deep Freeze
  615. Defeat the Elemental Titans
  616. Defend your castle
  617. Deferred Objects
  618. Define a card suit
  619. Defuse the bombs!
  620. Degree or not Degree (Radian brooo)
  621. Déjà vu Duplicates
  622. Delete occurrences of an element if it occurs more than n times
  623. Deletion in an array
  624. Delta Bits
  625. Depot organization 1
  626. Derive Cipher from Plaintext
  627. Describe the shape
  628. Design a simple markdown compiler with string substitution feature
  629. Detect Pangram
  630. Determine Results of Pole Vault Competition
  631. Devil's Sequence
  632. DevOps legacy roasting -> disco inferno -> burn baby burn
  633. DevOps New Kids On The Block VS Homie The Clown
  634. Diamonds and Toads
  635. Dice roll - D&D #1
  636. Dice Rolling
  637. Did she say hallo?
  638. Difference between biggest 2 numbers
  639. Difference between two collections
  640. Difference between years. (Level 1)
  641. Difference Of Squares
  642. DigitAll
  643. Digits Average
  644. Diophantine Equation
  645. Directions Reduction
  646. Disarium Number (Special Numbers Series #3)
  647. Distance Between 2 Points on a Cartesian Plane
  648. Distance from the average
  649. Distribute server workload
  650. Divide integers as strings
  651. Divide numbers as strings
  652. Divide two numbers without using the '/' operator and return the result to a specified number of decimal points
  653. Diving Scores
  654. Divisible by previous digit?
  655. Divisor harmony
  656. DNA GC-content
  657. Do something "n.times" (Simplifying "for" loops)
  658. Do you know how to make Query String?
  659. Do you speak "English"?
  660. Do you speak retsec?
  661. Dodgy delete key
  662. Dollars and Cents
  663. Dominant array elements
  664. Dominant primes
  665. Domino Tiling - 2 x N Board
  666. Domino Tiling - 3 x N Board
  667. Domino Tiling - 5 x 2N Board
  668. Domino Tiling - M x N Board with Holes
  669. Don't Drink the Water
  670. Don't Eat the Last Cake!
  671. Don't get stressed
  672. Don't rely on luck HARDCORE
  673. Dont drive too long!
  674. Doomsday Basic
  675. DOS era #1: Help!!!
  676. DOS era #2: Attrib
  677. Dota 2 Bots - Pudge's Meat Hook
  678. Double Rainbow!
  679. Double Trouble
  680. Down Arrow With Numbers
  681. DP - Edit Distance Part 2
  682. Draw a Circle.
  683. Dream Or Reality
  684. Dreidel dreidel
  685. Driving Licence
  686. Driving School Series #2
  687. Dropcaps
  688. Drunk friend
  689. Drying Potatoes
  690. Duck Duck Goose
  691. Dude E Free
  692. Dumb News: The Truth About CW Leaderboard !
  693. Dummy Epoch - find the gap
  694. Duplicate Arguments
  695. Duplicates. Duplicates Everywhere.
  696. Easy Cyclist's Training
  697. Easy Diagonal
  698. Easy Line
  699. Easy mathematical callback
  700. easy peasy - smallest input
  701. Easy Time Convert
  702. Echo
  703. Effeuiller la marguerite (loves me, loves me not)
  704. Elapsed Seconds
  705. Elections: Weighted Average
  706. Element equals its index
  707. Elevator algorithm
  708. Elevator Distance
  709. Elevator with call buttons
  710. Ellipse contains point?
  711. Elo rating - one game, one pair
  712. Email Validation
  713. Emily's Eccentric Encoding
  714. Emirps
  715. English beggars
  716. Enumerable Magic #1 - True for All?
  717. Enumerable Magic #3 - Does My List Include This?
  718. Enumerable Magic #4 - True for None?
  719. Enumerable Magic #5- True for Just One?
  720. Equation Discovery
  721. Equivalent Dice
  722. Error Throwing - Error Handling #2
  723. ES2015: Get the real length of string. 
  724. ES6 string addition
  725. Escape the maze
  726. Escaping The Matrix (Reloaded)
  727. Esolang Interpreters #1 - Introduction to Esolangs and My First Interpreter (MiniStringFuck)
  728. Especially Joyful Numbers
  729. esrever esreveR!
  730. Estimating Amounts of Subsets
  731. Estimating PI using the Monte Carlo method
  732. Euclidean distance in n dimensions
  733. Evaluate a postfix expression
  734. Even Binary Sorting
  735. Even Fibonacci Sum
  736. Even numbers in an array
  737. Even odd disparity
  738. Even Odd Pattern #1
  739. Evens and Odds
  740. Every archer has its arrows
  741. Every Every - Shortest Code
  742. Every nth array element. (Basic)
  743. Every possible sum of two digits
  744. Everything Is Even
  745. Evil Autocorrect Prank
  746. Excel sheet column numbers
  747. Exclusive "or" (xor) Logical Operator
  748. Exclusive presentations
  749. Expression Transpiler
  750. Expressive Objects
  751. Extended weekends
  752. Extended Weekends - Challenge Edition
  753. Extending JavaScript Objects: Contains Method
  754. Extending JavaScript Objects: Get First & Last Array Element
  755. Extending JavaScript Objects: Reverse String
  756. Extending JavaScript Objects: Simple Math Methods
  757. Extra Perfect Numbers (Special Numbers Series #7)
  758. extract file name
  759. Extract the IDs from the data set
  760. Fabergè Easter Eggs crush test
  761. Fac Recursion (Pest control - find the bugs and fix them)
  762. Factorial
  763. Factorial length
  764. Factory Functions #1 - Creating profile for people
  765. Factory Functions #2 - Inheritance and Object Composition
  766. Failed Filter - Bug Fixing #3
  767. Failed Sort - Bug Fixing #4
  768. Fake website #1: Choose a good name for the website
  769. Fake website #2: Choose a best server to create website
  770. Fake website #3: Choose a cool color for the web site
  771. Fake website #4: Design a strict user registration verification function
  772. Fake website #6: Design an automatic beta katas processing function
  773. Fame Of All
  774. Fast/Precise Natural Logarithm
  775. Fastest Code : A*B=C
  776. Fastest Code : Count animals
  777. Fastest Code : Equal to 24
  778. Fastest Code : Excel Puzzle #1
  779. Fastest Code : Excel Puzzle #2
  780. Fastest Code : Half it III
  781. Fastest Code : Half it IV
  782. Faulty Data Recovery
  783. Feed Kahumolings!
  784. Feynman's square question
  785. Fibo akin
  786. Fibonacci Generator
  787. Fibonacci on roids
  788. Fibonacci, Tribonacci and friends
  789. Fifa 17 Launch
  790. Figure Out the Notes
  791. File Finder
  792. File Size Trouble!
  793. Fill in the gaps in my timesheet.
  794. Filling an array (part 1)
  795. Filling an array (part 2)
  796. Filter out for good!
  797. Filter the array into unique values in 38 chars
  798. Filter the number
  799. Filter unused digits
  800. Filter valid romans
  801. Financing Plan on Planet XY140Z-n
  802. Find Cracker.
  803. Find a Bunch of Common Elements of Two Lists in a Certain Range
  804. Find a Very Special Set Of Numbers In a Certain Range
  805. Find Added
  806. Find All Array Values That Fall Within a Given Difference
  807. Find all non-consecutive numbers
  808. Find all occurrences of an element in an array
  809. Find an area
  810. Find array
  811. Find Factors Down to Limit
  812. Find Fibonacci last digit
  813. Find Grid Position
  814. Find heavy ball - level: conqueror
  815. Find heavy ball - level: master
  816. Find heavy ball - level: novice
  817. Find heavy ball - level: ubermaster
  818. Find last Fibonacci digit [hardcore version]
  819. Find me the names
  820. Find min and max
  821. Find Multiples of a Number
  822. Find Nearest square number
  823. Find number in an array # 2
  824. Find number in an array # 3
  825. Find number in an array # 4
  826. Find number in an array # 5
  827. Find number in an array # 6
  828. Find Number With Maximum Number Of Divisors
  829. Find Numbers with Same Amount of Divisors
  830. Find out the longest string chain
  831. Find out whether the shape is a cube
  832. Find sum of top-left to bottom-right diagonals
  833. Find The Minimum Number Divisible by Integers of an Array I
  834. Find the area of the rectangle!
  835. Find the calculation type
  836. Find the Capitals
  837. Find the discounted prices
  838. Find The Duplicated Number in a Consecutive Unsorted List - Tougher Version
  839. Find the First Number in Having a Certain Number of Divisors I
  840. Find the force of gravity between two objects
  841. Find the Golden Ticket!
  842. Find the hobbits!
  843. Find the Integral
  844. Find the Location for the Wildlife Study
  845. Find the longest gap!
  846. Find The Max Sum Of Contiguous-Submatrix In a Matrix - Ultimate Version
  847. Find the maximum possible product of 3 integers in an array
  848. Find the Middle of the Product
  849. Find the Mine!
  850. Find the missed number
  851. Find the missing element between two arrays
  852. Find the missing term in a Geometric Progression
  853. Find the missing term in an Arithmetic Progression
  854. Find the Most Probable Sum Value or Values, in Rolling N-dice of n Sides
  855. Find the motif in DNA sequence.
  856. Find the Nexus of the Codewars Universe
  857. Find the Nth longest string in an Array
  858. Find the Number?
  859. Find the odd int
  860. Find The Parity Outlier redux
  861. Find the position!
  862. Find the roots of a Quadratic Equation - Easy Version
  863. Find the smallest
  864. Find the sum of the roots of a quadratic equation
  865. Find the unique string
  866. Find the vowels
  867. Find the Word Pair!
  868. Find Transcription Factors
  869. Find twice of a number's value
  870. Find whether there is a route between two nodes in a graph
  871. Find within array
  872. Find X
  873. Finding North
  874. Finding Remainder Without Using '%' Operator
  875. Finding the Closest Maximum Values of a Function to an Upper Limit
  876. Finish this Mini Sudoku
  877. First n Prime Numbers
  878. First-Class Function Factory
  879. Fix arithmetic progression
  880. Fix array sequence
  881. Fix santas List - Christmas special #1
  882. Fix string case
  883. Fix your code before the garden dies!
  884. Fixed length palindromes
  885. FIXME: Get Full Name
  886. Fizz Buzz - Without ifs
  887. Fizz Buzz Reloaded
  888. FizzBuzz Backwards
  889. Flatten and sort an array
  890. flatten()
  891. Flexible Card Game
  892. Flight incident probabilities
  893. Floating-point Approximation (II)
  894. FloatStream
  895. Flow division
  896. Fly as fast as you can
  897. Folding your way to the moon
  898. Follow that Spy
  899. Following Sierpinski's Footprints
  900. Following the Paths of Numbers Through Prime Factorization
  901. Food combinations
  902. For the sake of argument
  903. For Twins: 1. Types
  904. For Twins: 2. Math operations
  905. For UFC Fans (Total Beginners): Conor McGregor vs George Saint Pierre
  906. Format a string of names like 'Bart, Lisa & Maggie'.
  907. Format data value
  908. Format Text
  909. Format words into a sentence
  910. Forming a Magic Square
  911. Four Pass Transport
  912. Foxes and rabbits
  913. Fractured Function Forge
  914. Free pizza
  915. Frequency Analysis With Buckets
  916. Freudian translator
  917. Friday the 13th Part 1
  918. Friends with Mangoes
  919. Frugal Pizza
  920. Fruit Machine
  921. Fruit string calculator
  922. Fuel economy converter (mpg <-> L/100 km)
  923. Fuel usage reporting
  924. Full Metal Chemist #1: build me...
  925. Fun with ES6 Classes #1 - People, people, people
  926. Fun with ES6 Classes #2 - Animals and Inheritance
  927. Fun with ES6 Classes #3 - Cuboids, Cubes and Getters
  928. Fun with ES6 Classes #4 - Cubes and Setters
  929. Function Cache
  930. Function Coercion Errors
  931. Function Wrapper: Nullity
  932. Function Wrappers: Inline Testing
  933. Function Wrappers: pool
  934. Function-Factory
  935. Function.prototype.clone
  936. Functional Addition
  937. Functional Binary Trees
  938. Functional Lists
  939. Functions of Integers on Cartesian Plane
  940. functions waterfall!
  941. Funny jubilees
  942. Future
  943. Gaussian primes
  944. Generalized Matrix Multiplication
  945. Generate a random number (the hard way!)
  946. Generate An Array of Unique Strings
  947. Generate range of integers
  948. Generate user links
  949. Generating Generators - Generators #3
  950. Generic Ball Clock
  951. Genetic Algorithm Series - #1 Generate
  952. Genetic Algorithm Series - #3 Crossover
  953. Geohashing
  954. Geometric Mean I
  955. Geometric Progression Sequence
  956. Geometry Basics: Circle Area in 2D
  957. Geometry Basics: Distance between circles in 2D
  958. Geometry Basics: Distance between points in 3D
  959. Geometry Basics: Triangle Area in 2D
  960. Geometry Basics: Triangle Perimeter in 2D
  961. Gerrymander Solver
  962. Get all array elements except those with specified indexes
  963. Get angle between hour and minute hands
  964. Get array elements with specified keys
  965. get ascii value of character
  966. get character from ASCII Value
  967. Get key/value pairs as arrays
  968. Get Password from grid
  969. Get root property name
  970. Get Smallest Common Factor
  971. Get the closure property
  972. Get the Excel column title!
  973. Get the Grid Coordinates
  974. Get the Mean
  975. Get your steppin' on son
  976. Get Zodiac Sign
  977. getNames()
  978. Getting along with Bernoulli's numbers
  979. Getting along with Integer Partitions
  980. Give me a Diamond
  981. Give me DST !!!
  982. Give me the k first digits. Odd digits.
  983. Global estimates
  984. Going to zero or to infinity?
  985. Goldbach’s Conjecture
  986. Gotta start somewhere - Code Tracker #1
  987. GPS Navigation
  988. Grab THOSE EVEN STRINGS !!
  989. Grandpa's pants
  990. Graphics Series #1: barcode EAN-13 part1
  991. Graphics Series #2: barcode EAN-13 part2
  992. Graphics Series #3: Repair the LED display
  993. Graphics Series #4: Fireworks
  994. Graphics Series #5: The rope is burning
  995. Graphics Series #6: Traffic lights check
  996. Grasshopper - Function syntax debugging
  997. Grasshopper - Object syntax debug
  998. Grasshopper - Terminal Game #1
  999. Greatest Common Factor of an Array
  1000. Greatest Difference
  1001. Green Glass Roof- Puzzles #6
  1002. Grocer Grouping
  1003. Group in 10s
  1004. Group Repeating Fractions
  1005. Gryffindor vs Slytherin Quidditch Game
  1006. Guess the array
  1007. Guess the list pattern #1
  1008. Guess the list pattern #2
  1009. Guess the number!
  1010. Hack My Account!
  1011. Hacker's job
  1012. Haiku Wizard
  1013. Half Life
  1014. Hall Of Fame
  1015. Hamming Distance - Part 1: Binary codes
  1016. Hamming(7,4) code - Message encoding
  1017. Hamster me
  1018. Handy Toolbox for Kata authors
  1019. Hangman
  1020. Hangman game
  1021. Hangŭl Unicode From Jamo Values
  1022. Hannah vs. Snooze Button
  1023. Happy New Year, 2018 !!
  1024. Happy numbers
  1025. Happy numbers to the n power
  1026. Hard Time Bomb
  1027. Harry and the Mathematician's Chicken
  1028. Haskell scanl function
  1029. Head, Tail, Init and Last
  1030. heggeleggleggo
  1031. Hello Happy Codevarrior!
  1032. Help Mrs Jefferson
  1033. Help Green Lantern with his web site
  1034. Help Kiyo きよ solve her problems LCM Fun!
  1035. Help Mr. E
  1036. Help Mr... Dr. Strange to bargain!
  1037. Help Suzuki complete his chores!
  1038. Help Suzuki count his vegetables....
  1039. Help Suzuki pack his coal basket!
  1040. Help Suzuki purchase his Tofu!
  1041. Help Suzuki rake his garden!
  1042. Help the general decode secret enemy messages.
  1043. Help your fellow warrior!
  1044. Help Yumi collect all the rings. Part 1
  1045. Heroes of Might & Magic II: One-on-One
  1046. Heroes of Might & Magic II: Chain Lightning
  1047. Hex class
  1048. Hex to base64
  1049. Hex Word Sum
  1050. Hexadecimal conversion
  1051. Hidden "Cubic" numbers
  1052. hidden key
  1053. Hide password from jdbc url
  1054. Hide phone numbers
  1055. Highest number with two prime factors
  1056. Hit Count
  1057. Hofstadter Q
  1058. Hold'em Holecard Combinatorics
  1059. Holiday I - Temperature in Bali
  1060. Holiday IV - Leg Room
  1061. Holiday IX - Transit Leg Massage
  1062. Holiday VI - Shark Pontoon
  1063. Holiday X - Bintang Vests
  1064. Hollow array
  1065. Hollow Triangle
  1066. Homogenous arrays
  1067. Horror Top Trumps (card game)
  1068. House of cards
  1069. House Robber
  1070. How deep do these trees even go?
  1071. How far can you pedal a bike???
  1072. How Green Is My Valley?
  1073. How long should you cook this for?
  1074. How long will it take the train to reach its final destination?
  1075. How low do you go?
  1076. How many are smaller than me II?
  1077. How many consecutive numbers are needed?
  1078. How many cows do you have?
  1079. How Many Differences of Squares?
  1080. How many dots are covered
  1081. How many eggs?
  1082. How many feelings?
  1083. How many numbers III?
  1084. How Many Numbers?
  1085. How Many Numbers? II
  1086. How many palindromes can you find ? (performance)
  1087. How many stairs will Suzuki climb in 20 years?
  1088. How many times should I go?
  1089. How much coffee do you need?
  1090. How Much Lines
  1091. How much tax?
  1092. How much Wood?
  1093. How Much?
  1094. How old will I be in 2099?
  1095. HTML DOM: Part 1 - Tree
  1096. HTML DOM: Part 2 - Attributes
  1097. Huffman Encoding
  1098. Human Friendly Random Numbers
  1099. Human readable duration format
  1100. Human readable working hours
  1101. Hungarian Vowel Harmony (harder)
  1102. I guess this is a 6kyu kata #10: Emotion of sentences
  1103. I guess this is a 6kyu kata #2: Merge strings
  1104. I guess this is a 6kyu kata #3: Trim the Christmas tree
  1105. I guess this is a 6kyu kata #5: Whac-A-Mole
  1106. I guess this is a 7kyu kata #1: Search result
  1107. I guess this is a 7kyu kata #4: Find 0 and 1
  1108. I guess this is a 7kyu kata #6: Fruit Ninja I
  1109. I love big nums and I cannot lie
  1110. I need a lookup quick!
  1111. I need more speed!
  1112. I Promise Not To Optimize
  1113. I Spy
  1114. I'm already Tracer
  1115. I'm longer than you!
  1116. Ideal electron distribution
  1117. Identical Elements
  1118. Identify the array's ordering
  1119. Image Files Only
  1120. Image Processing
  1121. Imaginary Base Conversion
  1122. Imperfect Fibonacci Rabbits
  1123. Imperfect Network #1 (duplicate messages)
  1124. Imperfect Network #2 (out-of-order messages)
  1125. Implement "The Match" to assign med school graduates to hospitals
  1126. Implement Array.prototype.forEach
  1127. Implement brute force protection
  1128. Implement Debounce
  1129. Implementing a Queue
  1130. Implementing a Queue - Performance Version
  1131. Implied Probability from Fractional Betting Odds
  1132. Indexed capitalization
  1133. Infinite Diceworks: MeanMaxing your rolls
  1134. Infinite Diceworks: MeanMaxing your rolls (Quantum Mechanically)
  1135. Infinite Sequences
  1136. Ins and Outs--Play game Series #6:
  1137. Insane Coloured Triangles
  1138. Insane Permutation Promenade (from AoC 2017 Day 16)
  1139. Insane TA
  1140. Insert Dashes 2
  1141. Insert into xml object - xml #3
  1142. Insert value into an array
  1143. Inserting multiple strings into another string
  1144. Inspiring Strings
  1145. Instant Runoff Voting
  1146. Integer depth
  1147. Integer reduction
  1148. Integer to Musical Pitch Classes
  1149. Integer triangles
  1150. Integer Triangles Having One Angle The Double of Another One
  1151. Integer with the longest Collatz sequence
  1152. Integers Sum Square
  1153. Integers: Recreation One
  1154. Integers: Recreation Two
  1155. Interactive Dictionary
  1156. Interesting Pyramid
  1157. Interlaced Spiral Cipher
  1158. Invalid Input - Error Handling #1
  1159. Inverted school grades
  1160. Inverting a Hash
  1161. IP Validation
  1162. IPv4 Parser
  1163. IPv6 address validation and contraction
  1164. IPv6 validator
  1165. Irreducible Sum of Rationals
  1166. Is a Prime?
  1167. Is Divisible By 6 Mk II
  1168. Is every value in the array an array?
  1169. Is Integer Array?
  1170. Is it a vowel on this position?
  1171. Is It In?
  1172. Is my girlfriend right?
  1173. Is n divisible by (...)?
  1174. Is the string uppercase?
  1175. Is there a sequence re-occuring in the list
  1176. Is there a vowel in there?
  1177. Is there an arrow missing ? (Relations - Part1: Reflexivity)
  1178. Is this working?
  1179. Is Undefined?
  1180. Is your period late?
  1181. isAN(value)
  1182. Isolate the keys
  1183. ISRC - Significant Figures
  1184. isReallyNaN
  1185. It's Full of Stars
  1186. Iterative Rotation Cipher
  1187. Iterator Basics
  1188. Jail Escape
  1189. Japanese Romaji-to-Hiragana Converter
  1190. Java format Unicode encoder/decoder
  1191. JavaScript class-like objects
  1192. Javascript filter - 1
  1193. Javascript filter - 2
  1194. Javascript filter - 3
  1195. Javascript from the Inside #1 : Map
  1196. Javascript from the Inside #2: Filter
  1197. Javascript Magic Function
  1198. Javascript Mathematician
  1199. JavaScript seems to be broken
  1200. Jewel Thief
  1201. Joe_fe's Kata #2
  1202. John and Ann sign up for Codewars
  1203. Join command (simplified)
  1204. Jokes you've been 'awaiting' for ... promise
  1205. Josephus Permutation
  1206. Josephus Survivor
  1207. JS Golfing #1: undefined
  1208. JS Golfing #2: Math.floor
  1209. JS Golfing #3: Math.round
  1210. JS Golfing #4: Math.random
  1211. JS Golfing #5: A Million Times
  1212. JS Golfing #6: String Summation
  1213. JS Golfing #7: Join
  1214. JS Golfing #8: Is it Uppercase?
  1215. JS is Weird: Return a
  1216. JS is Weird: Return fuelstar
  1217. JSON Account Updater
  1218. JSON Parser
  1219. Jumble words
  1220. Jump!
  1221. Jumping Kangaroos
  1222. Jumping Number (Special Numbers Series #4)
  1223. Jurassic Word
  1224. Just Adding and Multiplying
  1225. k-Primes
  1226. Kama Sutra Cipher Helper
  1227. Kaprekar Split
  1228. Kaprekar's Routine
  1229. Karnaugh's detonating timer (a k-map primer)
  1230. Kata Impossible I - The Impossible Lottery
  1231. Kebabize
  1232. Keypad horror
  1233. Keys, their drawings and ancient symbols
  1234. Keyword Cipher Helper
  1235. Kids and candies
  1236. KISS - Keep It Simple Stupid
  1237. Knapsack Part 1 - The Greedy Solution
  1238. Kushim the Accountant: Extract $ values from text
  1239. L1: Bartender, drinks!
  1240. Land perimeter
  1241. Large Factorials
  1242. Larger Product or Sum
  1243. Largest Cross Sum
  1244. Largest Elements
  1245. Largest integer exponent
  1246. Largest Palindromic Product
  1247. Largest product in a series
  1248. Largest product in a series
  1249. Last
  1250. Last and rich in circle
  1251. Last Digit of an Array
  1252. Last digit of a huge number
  1253. Last digit symmetry
  1254. Last digits of N^2 == N
  1255. Last man standing
  1256. Lat/Long Parser
  1257. Laxative Shot Roulette
  1258. Lazy Chain
  1259. Lazy evaluation
  1260. League Champions
  1261. Left$ and Right$
  1262. Length of words
  1263. Less or Equal
  1264. Let's convert British Pounds to Swiss Franks! (GBP) --> (CHF)
  1265. Let's Play Darts!
  1266. Letter calculator
  1267. Lexicographic Permutations
  1268. Life without primes
  1269. Limit string length - 1
  1270. Linda's speed test
  1271. Line Segments Intersection Point
  1272. Line, Normalization
  1273. Linear Equation Solver
  1274. Linear Regression of Y on X
  1275. Link Up--Play game Series #7
  1276. Linux history and ! command. Series#1 The !! command
  1277. Linux history and ! command. Series#2 The !n command
  1278. Linux history and ! command. Series#3 The !-n command
  1279. Linux history and ! command. Series#4 The !string command
  1280. Linux history and ! command. Series#5 The !?string command
  1281. List Comprehensions
  1282. Lists and Objects - Top Trump Optimizer
  1283. Live and Let Dice ...roll
  1284. Live Chess Ratings
  1285. Localize The Barycenter of a Triangle
  1286. Logic Calculator - Puzzles #3
  1287. Logical Conjunction
  1288. Logical Disjunctions
  1289. Logistic Map
  1290. Long Division
  1291. Longest Consecutive Sequence of Squares
  1292. Longest palindrome
  1293. Longest sequence with zero sum
  1294. Longest vowel chain
  1295. Longest Word in Dictionary
  1296. Look and say sequence generator
  1297. look!! Rare Planetary Alignment!
  1298. Looking for a benefactor
  1299. Loose Change
  1300. Loose Change!
  1301. Lorraine Wants to Win the TV Contest
  1302. Lost number in number sequence
  1303. Lost numbers
  1304. Lottery machine
  1305. Lottery Ticket
  1306. Lowercase strings in array
  1307. Lowest product of 4 consecutive numbers
  1308. LRU Cache
  1309. Lucas numbers
  1310. Lucas-Lehmer Test for Mersenne Primes
  1311. Luck check
  1312. Lucky Sevens
  1313. Lychrel numbers
  1314. LZW Compression - Squeeze that data!
  1315. LZW Compression (and decompression)
  1316. Mad Max: Recursion Road
  1317. Madhav array
  1318. Magic Square Validator
  1319. Magic Sum of 3s
  1320. Magic The Gathering #2: Mana
  1321. Magic The Gathering #3: Spell Stack
  1322. Mahjong - #2 Seven-pairs
  1323. Mahjong - #3 How far from winning
  1324. Mahjong - #4 Play with imagination!
  1325. Mahjong winning hand Validation #1: DA SI XI(大四喜)
  1326. Mahjong winning hand Validation #2: DA SAN YUAN(大三元)
  1327. Mahjong winning hand Validation #4: JIU LIAN BAO DENG(九莲宝灯)
  1328. Mahjong winning hand Validation #5: YI SE SI BU GAO(一色四步高)
  1329. Make a 1 to n sequence
  1330. Make a Palindrome
  1331. Make a square box!
  1332. Make acronym
  1333. Make Object Into Iterable Array
  1334. Make the Deadfish swim
  1335. Make the small words big!
  1336. makeAcronym
  1337. makeBackronym
  1338. Making Change
  1339. Making Change: Part 2
  1340. Making Copies
  1341. Making squares with lines
  1342. Man in the west
  1343. Manage the Robot Factory: Day 1
  1344. Mandelbrot set explorer
  1345. Manipulate URL Parameters
  1346. Manipulating financial time-series
  1347. Many Maps As One
  1348. Map and Filter to Get a Special Sequence of Integers
  1349. Map function issue
  1350. Marching armies
  1351. Markings to White Triangles and How to Find Them
  1352. Masquerade Waiting Line
  1353. Master your primes: sieve with memoization
  1354. Mastermind Hint Pegs
  1355. Math expression [HARD][CODE-GOLF]
  1356. Math Issues
  1357. Math Object Madness
  1358. Matrix creation
  1359. Matrix Multiplier
  1360. Matrix Rotation
  1361. Matrix Square Up, B!
  1362. Max Accessor Function
  1363. max diff - easy
  1364. Max number of people and year in a specific place
  1365. Max-min arrays
  1366. Maxed Out
  1367. Maximum Product of Parts
  1368. Maximum Product
  1369. Maya Number Converter
  1370. Meme Maker
  1371. Memesorting
  1372. Memoized Log Cutting
  1373. Memory Reallocation
  1374. Merge two arrays
  1375. MergeSort "merge" function
  1376. Message from Aliens
  1377. Messing with the Elements
  1378. Meta-Kata: Duplicate Detector v0.1
  1379. Metaprogramming: Lisp-style Generic Functions
  1380. Method For Counting Total Occurence Of Specific Digits
  1381. Mexican Wave
  1382. Mid-Endian numbers
  1383. Midpoint inception
  1384. Midtown Navigator
  1385. Miles per gallon to kilometers per liter
  1386. Milliseconds
  1387. Min Factor Distance
  1388. Min or Max of . . .
  1389. Mind the Gap
  1390. Mine Sweeper
  1391. Minimum dollar bill's count
  1392. Minimum Number of Coins
  1393. Minimum path in squares
  1394. Minimum Reduction
  1395. Minimum Steps (Array Series #6)
  1396. Minimum unfairness of a list/array
  1397. Miracle Sort
  1398. Mirroring cipher
  1399. Mispelled word
  1400. Missing Alphabet
  1401. Missing Angle
  1402. Missing Generator
  1403. Missing number in Unordered Arithmetic Progression
  1404. Mission: Hidden Message
  1405. Mix Fruit Juice
  1406. Mixbonacci
  1407. mkdir -p
  1408. Mnemo Passwords : pwgen
  1409. Mnemonic Lookup
  1410. Modulo operations of big Numbers
  1411. Monads: The Maybe Monad
  1412. Monads: The list monad
  1413. Money Match: Double or Nothing
  1414. Mongodb ObjectID
  1415. Monkey Talk
  1416. Monkey Tennis - The Aftermath
  1417. Monkey's MATH 01: How many "ZERO"s?
  1418. MONTE CARLO 3D
  1419. month name story
  1420. Months, Weeks, Days, Hours and Minutes
  1421. Most Consecutive Zeros of a Binary Number
  1422. Most Frequent Weekdays
  1423. Most frequently used words in a text
  1424. Mount Events in ReactJS
  1425. Mountain View
  1426. Moves in squared strings (I)
  1427. Moves in squared strings (II)
  1428. Moves in squared strings (III)
  1429. Moves in squared strings (IV)
  1430. Moving element in an array
  1431. Mr. Freeze
  1432. Mr. Right & Mr. Wrong #2: Who is Mr.Wrong?
  1433. MTV Cribs
  1434. Multi Line Task: Fizz Buzz
  1435. Multi Line Task: GCD Function
  1436. Multi Line Task++: Hello World
  1437. Multi Line Task∞: Hello World
  1438. Multiple implications
  1439. Multiple of index
  1440. Multiple remainder of the division
  1441. Multiple Shots at Victory
  1442. Multiples by permutations
  1443. Multiples By Permutations II
  1444. Multiples of 3 and 5 redux
  1445. Multiplication - Generators #2
  1446. Multiplication sequence - part 1
  1447. Multiplicative Persistence... What's special about 277777788888899?
  1448. Multiply a very large number
  1449. Multiply characters
  1450. Multiply list by integer (with restrictions)
  1451. Multiply the number
  1452. Multiply Word in String
  1453. multiply(value, times)
  1454. Mutate My Strings
  1455. Mutual Recursion
  1456. myjinxin katas #001 : Rotate, Remove, Rerurn
  1457. myjinxin katas #002 : Hotel room number
  1458. myjinxin katas #003 : Crossword puzzle
  1459. myjinxin katas #004 : Soldier's queue training(easy version)
  1460. myjinxin katas #005 : Age Of Wind
  1461. myjinxin's Fairy tales #001 : Aladdin's lamp and three wishes
  1462. myjinxin's Fairy tales #002 : Ali Baba and the Forty Thieves I
  1463. myjinxin's Fairy tales #003 : Ali Baba and the Forty Thieves II
  1464. myjinxin's Fairy tales #004 : Ali Baba and the Forty Thieves III
  1465. myjinxin's Fairy tales #005 : The little match girl
  1466. Mystery Function
  1467. Mystery function #1
  1468. Mystery function #2
  1469. N High Scores
  1470. N smallest elements in original order
  1471. n-Bonacci Ratio
  1472. N-centered Array
  1473. N-Parasitic Numbers Ending in N
  1474. N00bify - English to n00b Translator
  1475. Name Array Capping
  1476. Name on billboard
  1477. Name Shuffler
  1478. Name That Integer
  1479. Name to Matrix
  1480. Name Your Space
  1481. Narcissistic Numbers
  1482. Natas Recipes
  1483. National Bath Safety Month
  1484. NATO Phonetic Alphabet
  1485. Natural Log Approximator
  1486. Naughty or Nice?
  1487. Needles in a haystack
  1488. Negation of a Value
  1489. Nesting Structure Comparison
  1490. New £5 notes collectors!
  1491. new Deck() of Cards
  1492. new IntStorage(byteLength, ints).read(from, count);
  1493. new IntStorage(byteLength).write(value, length)
  1494. new with apply
  1495. Next Featured Number Higher than a Given Value
  1496. Next Largest Value (by rearranging the last digit and the last by one if neccessary)
  1497. Next Palindromic Number.
  1498. Next smaller number with the same digits
  1499. Nice Array
  1500. Nickname Generator
  1501. NIM the game
  1502. Ninety Nine Thousand Nine Hundred Ninety Nine
  1503. Ninja vs Samurai: Attack + Block
  1504. Ninja vs Samurai: Strike
  1505. No Duplicates Here
  1506. No Loops 1 - Small enough?
  1507. No Loops 1 - Small enough? - Shortest Code Version
  1508. No Loops 2 - You only need one
  1509. No Loops 2 - You only need one - Shortest Code Version
  1510. No Return #2: Test the Devices
  1511. No Return #3: Solve the Equation
  1512. Node.js Async I/O
  1513. Non Decomposable Primes as Sums of Perfect Squares
  1514. Non-even substrings
  1515. None shall pass
  1516. noobCode 03: CHECK THESE LETTERS... see if letters in "String 1" are present in "String 2"
  1517. noobCode 04: HOT SINGLES...compare two arrays, return the unpaired items !
  1518. Noonerize Me
  1519. NOP
  1520. Normal number
  1521. Normalizing Out of Range Array Indexes
  1522. Not 3 in a row
  1523. Not all but sometimes all
  1524. Not prime numbers
  1525. Not Quine
  1526. Not so black box
  1527. Not that obvious summation
  1528. Not very secure
  1529. Now that's a crib!
  1530. Noye's Fludde
  1531. NSA Phone Tapping
  1532. NSA's Little Puzzle
  1533. nth Floyd line
  1534. Nth Smallest Element (Array Series #4)
  1535. Nth term - Linear Sequences
  1536. Nuclear Missile Manager
  1537. Number , number ... wait LETTER !
  1538. Number climber
  1539. Number Decoding
  1540. Number Manipulation I (Easy)
  1541. Number of anagrams in an array of words
  1542. Number of Folds
  1543. Number of measurements to spot the counterfeit coin
  1544. Number of Palindromic Substrings
  1545. Number of permutations without repetitions
  1546. Number of Proper Fractions with Denominator d
  1547. Number Shortening Filter
  1548. Number to words
  1549. number with 3 roots.
  1550. Number-like counter
  1551. Number-Star ladder
  1552. Number.prototype.toDecimal
  1553. Numbers and its Reversal Having Same Prime Factors.
  1554. Numbers in different systems
  1555. Numbers in strings
  1556. Numbers of Letters of Numbers
  1557. Numbers that are a power of their sum of digits
  1558. Numbers Which Sum of Powers of Its Digits Is The Same Number
  1559. Numbers' Plus Pattern
  1560. Numerical Palindrome #1
  1561. Numerical Palindrome #1.5
  1562. Numerical Palindrome #2
  1563. Numerical Palindrome #3
  1564. Numerical Palindrome #3.5
  1565. Numerical Palindrome #4
  1566. Numerical Palindrome #5
  1567. Numerology
  1568. NxN Connect X
  1569. Obfuscation confusion - Bug Fixing #10
  1570. Object to Array
  1571. object to xml - xml #2
  1572. Objectify all the strings
  1573. Odd Not Prime
  1574. Odd-Even String Sort
  1575. Odd-heavy Array
  1576. Odds-Index
  1577. Offload your work!
  1578. Offspring Traits
  1579. Oh come on! Hello world! once again?
  1580. Oh dear God! Is it bugged?
  1581. Oktober Fest: Bjorg's Got A Drinking Problem
  1582. Old Greg's Binary Fingers
  1583. Once
  1584. One down
  1585. One graph or multiple ones ?
  1586. One Line : Bit Calculator
  1587. One line kata: Sum Multiples of 3 and 5
  1588. One Line Task: 'for' fun
  1589. One Line Task: Diamond Creator Pro
  1590. One Line Task: Making Pizza
  1591. One line task: Multiples of 3 and 5
  1592. One Line Task: Paint The Walls Of Office
  1593. One line task: Square a number Without *, + or Math.pow()
  1594. One line task: Square Every Digit
  1595. One Line Task: String Isomorphism
  1596. One Line Task: The Special Downward Step
  1597. One Line Task: Upside-Down Pyramid Addition...REVERSED
  1598. One Line Wonder: Sum All Even Fibonacci Numbers
  1599. One Line: Even Check
  1600. One Line: Even Odd Converter
  1601. One Variable Second Degree Equation Solver
  1602. Ones' Complement
  1603. Onion array
  1604. Ookkk, Ok, O? Ook, Ok, Ooo!
  1605. Operation - Steal the Election!
  1606. Operator Precedence (for beginners)
  1607. Optimum coding school location
  1608. Oracle: Coin Method
  1609. Order Elements in an Array
  1610. Ordinal number check
  1611. Ordinal Numbers
  1612. Ore Numbers
  1613. Organise duplicate numbers in list
  1614. ORing arrays
  1615. Orthogonal Vectors
  1616. Pack the box.
  1617. PaginationHelper
  1618. Pair of gloves
  1619. Pair Zeros
  1620. Palindrome
  1621. Palindrome for your Dome
  1622. Palindrome integer composition
  1623. Palindromes with a slight twist: vowels & consonants assessed separately
  1624. Palindromic Mnemonics
  1625. Paragraph Setting: Align Left
  1626. Parallel resistors
  1627. Parity bit - Error detecting code
  1628. Parse a linked list from a string
  1629. Parse all my XML please - Angular #1
  1630. Parse HTML/CSS Colors
  1631. Parse this function! - Puzzles #7
  1632. Parsing musical notes into MIDI
  1633. Part 1: Evil Programming Government Restrictions
  1634. Partial Word Searching
  1635. Partially equal objects
  1636. Partition On
  1637. Parts of a list
  1638. Password Check - Binary to String
  1639. Path Finder #2: shortest path
  1640. Path Finder #3: the Alpinist
  1641. Path Finder #4: where are you?
  1642. Path Finder #5: there's someone here
  1643. Paths in the Grid
  1644. Paul Cipher & Kevin Arnold
  1645. PC upgrade specs using HOC in ReactJS
  1646. Peak array index
  1647. Peel the Pairs
  1648. Pentabonacci
  1649. Percentage of amino acids
  1650. Perfect Square.
  1651. Perimeter of squares in a rectangle
  1652. Permutation position
  1653. Permutation Average
  1654. Permutation by number
  1655. Permutational Primes
  1656. Permutations - Generators #4
  1657. Permutations Of An Array And Associated Values
  1658. Permute a Palindrome
  1659. Personalising Spammy Marketing Emails
  1660. Personalized brand list
  1661. Pete, the baker
  1662. Physics - Mechanics - Atwood Machines in Series
  1663. Piano Kata, Part 1
  1664. Piano Kata, Part 2
  1665. pick a set of first elements
  1666. Pig Sursurunga
  1667. Pillow on the Fridge
  1668. Ping-Pong service problem
  1669. Pinocchio's polygraph.
  1670. Pitches and Notes
  1671. Pizza Payments
  1672. Pizza Pi Parsimony
  1673. Plants and Zombies
  1674. Play FlappyBird : Advance Bravely
  1675. Play PacMan : Devour all
  1676. Play PingPong : Precise control
  1677. Play Tetris : Shape anastomosis
  1678. Player Contact Manager
  1679. Player Methods - Dungeon crawler #2
  1680. Playing on a chessboard
  1681. Playing with Sets : Complement
  1682. Playing with Sets : Equal or Not ?
  1683. Playing with Sets : Intersection
  1684. Playing with Sets : Sup/Sub
  1685. Playing with Sets : Symmetric difference
  1686. Playing with Sets : Union
  1687. Playing with types
  1688. Plenty of Fish in the Pond
  1689. Plus - minus - plus - plus - ... - Count
  1690. Plus - minus - plus - plus - ... - Sum
  1691. Podcast Speed Listening Calculator
  1692. Points of Reflection
  1693. Pokemon Go
  1694. Pokemon Go - Extended Edition
  1695. PokerHelper lvl. 1
  1696. Pole Vault Starting Marks
  1697. Polish alphabet
  1698. Polygon Orientation
  1699. Pong! [Basics]
  1700. Poor man's spreadsheet API
  1701. Portion of Array
  1702. Possibilities of throwing a coin n times
  1703. Possible Triangles Formed with Available Iron Rods
  1704. Potenciation
  1705. Potion Class 101
  1706. Power
  1707. Power .bind()
  1708. Power 2
  1709. Power Laws
  1710. Powers of 3
  1711. Powers of i
  1712. Practical Interview Prep: Binary Search Tree .contains()
  1713. Practical Interview Prep: Binary Search Tree .push()
  1714. Pre-FizzBuzz Workout #1
  1715. Prefix Permutation
  1716. Presentation order
  1717. Preserve the order !
  1718. Pretty date
  1719. Price is right
  1720. Price of Mangoes
  1721. Prime reduction
  1722. Prime reversion
  1723. Prime Word
  1724. Primes in numbers
  1725. Primitive Pythagorean Triples
  1726. Primorial Of a Number
  1727. Print a Rectangle Using Asterisks
  1728. Print count and numbers
  1729. Print number with character
  1730. PRNG: Linear Congruential Generator
  1731. Process Waterfowl Survey Data Results
  1732. Product Array (Array Series #5)
  1733. Product ID from URL
  1734. Product of Adjacent Grid Numbers
  1735. Product of consecutive Fib numbers
  1736. Product Of Maximums Of Array (Array Series #2)
  1737. Product of the main diagonal of a square matrix.
  1738. Product of two squares
  1739. Product-Sum Numbers
  1740. Program a Calculator #1 - Points in 3D Space
  1741. Program a Calculator #2 - 3D Vectors
  1742. Progressive Spiral Number Branch
  1743. Progressive Spiral Number Distance
  1744. Progressive Spiral Number Position
  1745. Promises Made and Broken: The Misadventures of Bob the Highly Paid Consultant
  1746. Proofreading task: find all duplicate words in a multilingual text
  1747. Protein Synthesis: From DNA to Polypeptide
  1748. Pull your words together, man!
  1749. Push a hash/an object into array
  1750. Puzzle Fighter
  1751. Pythagorean Triplets
  1752. PythonSlice
  1753. Quadratic Enumerator
  1754. Quadruple M
  1755. Quantum Bogosort
  1756. Quartile methods
  1757. Queue Battle
  1758. Queue time counter
  1759. Queue time counter [hard core version]
  1760. Quick (n choose k) calculator
  1761. Quick! Sort!
  1762. Quicksum
  1763. Quidditch Scoreboard
  1764. Quipu Calculator
  1765. Rainfall
  1766. Random case
  1767. Random number in range
  1768. Randomize Objects
  1769. Range function
  1770. Range of Integers in an Unsorted String
  1771. Rank Vector
  1772. Ranking Appointments
  1773. Ranking System
  1774. Rap-Name Generator
  1775. Ratio of Bouncy Numbers
  1776. Reach Me and Sum my Digits
  1777. React Fun #1: Component types and nesting
  1778. React with JSX
  1779. Read the time
  1780. Readability is King
  1781. Readable developer-friendly large numbers
  1782. Really Complex Sum
  1783. Rearrange Number to Get its Maximum
  1784. Rectangle into Squares
  1785. Recurrence by Recursion
  1786. Recursion 101
  1787. Recursion #1 - Factorial
  1788. Recursion #2 - Fibonacci
  1789. Recursion: An introduction
  1790. Recursive Averages
  1791. Recursive Floor Sequence
  1792. Recursive Ninja
  1793. Recursive Ninja: Warlords edition
  1794. Reducing by steps
  1795. Reducing Fractions
  1796. Reducing Problems - Bug Fixing #8
  1797. Refactored Greeting
  1798. refactoring the statement
  1799. regex validation of 24 hours time.
  1800. Regex Match Generator: Alternation
  1801. Regexp Basics - is it IPv4 address?
  1802. Regexp basics - parsing mana cost
  1803. RegExp for validation string
  1804. RegExp Fun #1 - When I miss few days of gym
  1805. Regular Expression - Check if divisible by 0b111 (7)
  1806. Regular Expression for Binary Numbers Divisible by n
  1807. Reimplement Multiplication Part 1
  1808. Relatively Prime Numbers
  1809. Remember
  1810. Remove a Specific Element of an Array
  1811. Remove All The Marked Elements of a List
  1812. Remove consecutive duplicate words
  1813. Remove duplication
  1814. Remove even-count symbol occurrences
  1815. Remove First and Last Character Part Two
  1816. Remove HTML tags using regexp
  1817. Remove method in Arrays
  1818. Remove the extra lowercase 'a' characters
  1819. Remove Zeros
  1820. ReOrdering
  1821. repeatIt
  1822. Replace Noun Phrases with Pronouns
  1823. Replace values with strings
  1824. Replacement cipher
  1825. Represent array of numbers as ranges
  1826. Retrieve Ether Balance
  1827. Return 2019 but without numbers or letters!
  1828. Return a sorted list of objects
  1829. Return a string's even characters.
  1830. Return Specifics from an Object.
  1831. Return String of First Characters
  1832. Return the first M multiples of N
  1833. Return TIMESTAMP from date
  1834. Reverse a Number
  1835. Reverse DNS delegation (RFC4183)
  1836. Reverse every other word in the string
  1837. Reverse fibonacci series
  1838. Reverse Letters in Sentence
  1839. Reverse Mode
  1840. Reverse or rotate?
  1841. Reverse Vowels In A String
  1842. Reversed Message
  1843. reverseIt
  1844. Reverser
  1845. Reversi row rudiments
  1846. riemann sums I (left side rule)
  1847. Rithm Series: Frame a Phrase Simple
  1848. Roasting Chicken
  1849. Robbing Rövarspråket
  1850. RoboScript #5 - The Final Obstacle (Implement RSU)
  1851. Robot Vacuum Cleaner
  1852. Robotic Tattoo Removal
  1853. Rock Paper Scissors Oracle
  1854. Roman numerals converter and validator
  1855. Romanize Russian Road Signs
  1856. ROT13
  1857. ROT13 variant cipher
  1858. Rotate an array matrix
  1859. Rotate Array (JS)
  1860. Rotate Corners
  1861. Rotate for a Max
  1862. Rotate matrix counter - clockwise N - times!
  1863. Rotated string
  1864. Rotation Cipher Cracker
  1865. Round and Padded
  1866. Round by 0.5 steps
  1867. Round to nearest 0 or 5
  1868. Route Calculator
  1869. Routes in a square grid
  1870. Rule 30
  1871. Run-length compression by rule
  1872. Running out of space
  1873. RuplesJS #1: N Times Do
  1874. RuplesJS #2: String Delete
  1875. RuplesJS #3: String EachChar
  1876. RuplesJS #4: String Formatting
  1877. RuplesJS #5: Range
  1878. Russian plurals
  1879. Russian postal code checker
  1880. Saint Petersburg Paradox Model
  1881. Same Birthday Probability
  1882. Santa wish list form in ReactJS
  1883. SantaClausable Interface
  1884. Sashay, array!
  1885. Satisfying numbers
  1886. Save Private Brain
  1887. Scaling Squared Strings
  1888. Scheduling (Round-Robin)
  1889. Scheduling (Shortest Job First or SJF)
  1890. ScholarStem: Unit 6- Sorting Hat!
  1891. Schrödinger's Boolean
  1892. Scooby Doo Puzzle
  1893. Scrambled Numbers Sorting
  1894. Scramblies
  1895. Scraping: Codewars Top 500 Users
  1896. Screen Locking Patterns
  1897. Scrolling Text
  1898. Search and sort names
  1899. search in multidimensional array
  1900. Seating arrangement at a Polyglot Summit
  1901. Second largest in Array
  1902. Secret Agent - Discriminate Missions
  1903. Secret Agent 101: The secret password
  1904. Secret Code
  1905. Secret knock
  1906. Secret Message
  1907. Secret Reverse Language Converter
  1908. See You Next Happy Year
  1909. Seeing Shows at the Edinburgh Fringe!
  1910. Selective Array Reversing
  1911. Selective fear of numbers
  1912. self_converge
  1913. Self-Descriptive Numbers
  1914. Semi-Optional
  1915. Sentence Calculator
  1916. Sentences with Functions
  1917. Separate The Wheat From The Chaff
  1918. Separating Strings
  1919. Sequence classifier
  1920. Sequence convergence
  1921. Sequence to 1
  1922. Sequences and Series
  1923. Series Forensics
  1924. Set - the card game
  1925. Seven "ate" nine!
  1926. SevenAte9
  1927. Seventh JSON of a seventh JSON
  1928. Sexy Primes <3
  1929. Shakespearean Tug of War
  1930. Shape Symmetry
  1931. Share prices
  1932. Sharpen up
  1933. Shifty Closures
  1934. Shop Inventory Manager
  1935. Shorten Me: Array Declaration II (undefined)
  1936. Shorten Me: Array Declaration III (Fibonacci Last Digit)
  1937. Shorten Me: Array Declaration IV (1-30)
  1938. Shorten Me: Array Declaration IX (Variable Types)
  1939. Shorten Me: Array Declaration V (Weekday & Weekend)
  1940. Shorten Me: Array Declaration VI (Months)
  1941. Shorten Me: Array Declaration VII (Alphabets)
  1942. Shorten Me: Array Declaration VIII (Musical Scales)
  1943. Shorten Me: Array Declaration X (O-I-II)
  1944. Shorten Me: Array Declaration XI (Triangle)
  1945. Shorten Me: Array Declaration XII (Constants)
  1946. Shorten Me: Mad Mathematician's Algorithm I (Addition)
  1947. Shorten Me: Mad Mathematician's Algorithm II (Subtraction)
  1948. Shorten Me: Mad Mathematician's Algorithm III (Multiplication)
  1949. Shorten Me: Mad Mathematician's Algorithm IV (Division)
  1950. Shorten Me: Mad Mathematician's Algorithm V (Modulus)
  1951. Shorten Me: Mad Mathematician's Algorithm VI (Power)
  1952. shorter concat [reverse longer]
  1953. Shortest Code : Are they symmetrical?
  1954. Shortest code : Balance Attraction
  1955. Shortest Code : Eat watermelon
  1956. Shortest Code : Find the murderer
  1957. Shortest Code : Guess the Hat
  1958. Shortest Code : Jumping Dutch act
  1959. Shortest Code : Planting Trees
  1960. Shortest Code : Reading a Book
  1961. Shortest Code : Regular expression compression
  1962. Shortest Code : Remove screws I
  1963. Shortest Code : Special factor
  1964. Shortest code : Tidy up the room
  1965. Shortest Code : Waiting for a Bus
  1966. Shortest code: Bug in Apple
  1967. Shortest Code: Collatz Array(Split or merge)
  1968. Shortest code: Father and Son
  1969. Shortest code: Give me the equation
  1970. Shortest code: Max Value
  1971. Shortest Code: Symmetric Sort
  1972. Shortest Code: Trypophobia
  1973. Shortest code: Virus in Apple
  1974. Shortest Knight Path
  1975. Shortest steps to a number
  1976. Showing X to Y of Z Products.
  1977. Shrink the maze!
  1978. SillyCASE
  1979. Simple array rotation
  1980. Simple division
  1981. Simple arithmetic progression
  1982. Simple Arithmetics on X
  1983. Simple array product
  1984. Simple Blackjack
  1985. Simple Change Machine
  1986. Simple Collatz Sequence generator
  1987. Simple Comparison?
  1988. Simple consecutive pairs
  1989. Simple CSS selector comparison
  1990. Simple digit code breaker
  1991. Simple directions reversal
  1992. Simple equation reversal
  1993. Simple Events
  1994. Simple eviternity numbers
  1995. Simple fibonacci strings
  1996. Simple fraction to mixed number converter
  1997. Simple frequency sort
  1998. Simple Fun #364: Not Too Random
  1999. Simple Fun #365: Remove Number Game I
  2000. Simple Fun #377: The Visible Posters II
  2001. Simple Interest and Compound Interest
  2002. Simple Julian date
  2003. Simple letter removal
  2004. Simple Maths Test
  2005. Simple max digit sum
  2006. Simple Memory Manager
  2007. Simple missing sum
  2008. Simple nearest prime
  2009. Simple non-decreasing array
  2010. Simple number sequence
  2011. Simple palindrome game
  2012. Simple parenthesis removal
  2013. Simple Physics Problem
  2014. Simple prime streaming
  2015. Simple remove duplicates
  2016. Simple repeated words
  2017. Simple reversal game
  2018. Simple reversed parenthesis
  2019. Simple rotated palindromes
  2020. Simple Ruby code formatter
  2021. Simple safecracking
  2022. Simple Simple Simple String Expansion
  2023. Simple string characters
  2024. Simple string division
  2025. Simple string division II
  2026. Simple string expansion
  2027. Simple string indices
  2028. Simple string matching
  2029. Simple string reversal
  2030. Simple string reversal II
  2031. Simple Substitution Cipher Helper
  2032. Simple sum of pairs
  2033. Simple template
  2034. Simple Time Bomb
  2035. Simple time difference
  2036. Simple Web Framework #1: Create a basic router
  2037. simpleLog
  2038. Simplify the number!
  2039. Simplifying multilinear polynomials
  2040. Simulating a Multiserver Queue
  2041. Simultaneous Equations - Three Variables
  2042. Single character palindromes
  2043. Single character palindromes II
  2044. Single-Use Tickets: Don't Let Anyone Sneak In!
  2045. Singleton Pattern
  2046. Sir , showMe yourID
  2047. Slamming Lockers
  2048. Sleepy Seals
  2049. sliceBits(int, from, count)
  2050. Sliding Puzzle Solver
  2051. Slow Looping
  2052. Smallest Pair Sum
  2053. Smallest possible sum
  2054. Smallest Product
  2055. Smart Sum
  2056. Smart Toaster
  2057. Smith number
  2058. Smooth numbers
  2059. SMS Lottery Bet Validator
  2060. SMS Shortener
  2061. Soccer Fixtures Results Table
  2062. Socialist distribution
  2063. Solomon's Quest for the Temporal Crystal
  2064. Solve For X
  2065. solve from sums
  2066. Solve Rubik 's Cube by repetition
  2067. Solving Quadratics
  2068. Some Circles
  2069. Some First Primes With Two Digits
  2070. Something 's fishy...
  2071. Sort a 2D array
  2072. Sort and Transform
  2073. sort array by last character
  2074. Sort it out!
  2075. Sort Letters Sum Numbers
  2076. Sort My Shopping
  2077. Sort rectangles and circles by area
  2078. Sort the climbing grades
  2079. Sort the Gift Code
  2080. Sort the Vowels!
  2081. Sorted Arrays
  2082. Sorted list
  2083. Sorted Union
  2084. Sorting Arrays by the Amount of Perfect Squares that Each Element May Generate
  2085. Sorting by bits
  2086. Sorting the Rabbit Hole
  2087. Sorting Time
  2088. sortOf function
  2089. Space Invaders Underdog
  2090. Spanish Conjugator
  2091. Spanish Pirates off the Treasure Coast
  2092. Sparse Ruler
  2093. Sparse array split function
  2094. Special Number (Special Numbers Series #5)
  2095. Special Multiples
  2096. Special Scores For Words
  2097. Speech to Text - String Manipulation
  2098. SpeedCode #1 - Getters and Setters in Object Literals
  2099. SpeedCode #2 - Array Madness
  2100. SpeedCode #3 × Fun with ES6 Classes #5 - Dogs and Classes
  2101. SpeedCode #4 × Factory Functions #3 - Artefacts
  2102. Spicy or Not
  2103. Spider man and his enemy
  2104. Spidey Swings Across Town
  2105. Spinning Rings
  2106. Spiral Matrix
  2107. Split an array
  2108. Split and then add both sides of an array together.
  2109. Split camelcase
  2110. Split In Parts
  2111. Split string for Text-to-Speech API
  2112. Split The Bill
  2113. sPoNgEbOb MeMe
  2114. Spoonerize Me
  2115. Sports league table - help your local team!
  2116. Spraying trees
  2117. Spy Function
  2118. Square root without using library : math
  2119. Square sums (simple)
  2120. Square-Squeek numbers
  2121. Squarefree Part of a Number
  2122. Squares sequence
  2123. Stack Safe Recursion
  2124. Stargate SG-1: Cute and Fuzzy (Improved version)
  2125. Start with a Vowel
  2126. Statistics - Fundamentals
  2127. Statistics for an Athletic Association
  2128. Statistics in Kata 2: AND case - Ball bags
  2129. Steer the Ship
  2130. Steps in k-primes
  2131. Steven's Password Decryption
  2132. Stock Position Size Calculator
  2133. Stone bridge primes
  2134. Stop it, HTML!
  2135. Stop worrying!
  2136. Strange roman numbers
  2137. Street Fighter 2 - Character Selection
  2138. String array duplicates
  2139. String like [Char]
  2140. String basics
  2141. String Box
  2142. String Breakers
  2143. String character frequency
  2144. String chunks
  2145. String Compression Challenge
  2146. String counting
  2147. String doubles
  2148. String Evaluation
  2149. String formatter
  2150. String Gymnastics
  2151. String Integer Greater-than
  2152. String matchup
  2153. String Merge!
  2154. String reduction
  2155. String Reordering
  2156. string return in alphabetical order
  2157. String Scramble
  2158. String subpattern recognition I
  2159. String subpattern recognition II
  2160. String subpattern recognition III
  2161. String Suffixes
  2162. String Templates - Bug Fixing #5
  2163. Strings to numbers
  2164. Strings, strings, strings (Easy)
  2165. Strings, strings, strings (Hard)
  2166. Students' names list
  2167. Stutter function
  2168. Sub-array division
  2169. Subnet Calculating
  2170. Subsequences
  2171. Sum #2
  2172. Sum and Rest the Number with its Reversed and See What Happens
  2173. Sum by Factors
  2174. Sum decomposition
  2175. Sum of (Two) Squares
  2176. Sum of a Sequence [Hard-Core Version]
  2177. Sum of all arguments
  2178. Sum of array singles
  2179. Sum of differences between products and LCMs
  2180. Sum of differences in array
  2181. Sum of digits
  2182. Sum of integer combinations
  2183. Sum of integers in string
  2184. Sum of Multiples
  2185. Sum of numerous arguments
  2186. Sum of prime-indexed elements
  2187. Sum Only Numbers
  2188. Sum Square Difference
  2189. Sum The Strings: ARRAY EDITION
  2190. Sum up the random string
  2191. Sum with Arrows
  2192. sum2total
  2193. Summarize ranges
  2194. Summy
  2195. Super Class Extensions
  2196. Super Smaaassh Brotheerrrs!
  2197. Superphore Master
  2198. Surface Area and Volume of a Trapezoidal Prism
  2199. Sushi-go-round (Beginner's)
  2200. Suzuki needs help lining up his students!
  2201. Swap the head and the tail
  2202. Swap two elements
  2203. Swap two numbers
  2204. Swapping values (Revamped!)
  2205. Swarm bots - swarm intelligence #1
  2206. Swedish Tipping
  2207. Sweet Dreams are Made of Cheese
  2208. Switch/Case - Bug Fixing #6
  2209. Symbolic differentiation of prefix expressions
  2210. Symbols counted
  2211. Synchonizing records
  2212. T.T.T. #7: Profit or loss
  2213. T.T.T. #8: Reverse all
  2214. T.T.T. #9: Peaks and valleys
  2215. T.T.T.#2: Equal to 24
  2216. T.T.T.#3: Three lifts
  2217. T.T.T.#4: Key of door
  2218. T.T.T.#5: Only you
  2219. T.T.T.#6: nth user
  2220. T.T.T.10: The largest square
  2221. T.T.T.11: Three increasing numbers
  2222. T.T.T.12: Split integer
  2223. T.T.T.13: A game named "Five,Ten,Fifteen,Twenty"
  2224. T.T.T.14: Find the largest "X"
  2225. T.T.T.15: Sort the alarm clock
  2226. T.T.T.16: Warning of Array.map()
  2227. T.T.T.23: Silly birds
  2228. T.T.T.24: Chinese surname (《百家姓》)
  2229. T.T.T.33: Grandfather clock
  2230. T.T.T.38: The sum of each digits
  2231. T.T.T.40: m to n % 9
  2232. T.T.T.41: The maximum profit
  2233. T.T.T.43: The appellation of the Chinese people's age and his zodiac（中国人的年龄和他的生肖称谓）
  2234. T.T.T.53: Fighting for love! Knights of the round
  2235. T.T.T.58: Simple face recognition system
  2236. T.T.T.59: The language from the distant planet
  2237. T.T.T.60: Break all the rules
  2238. T.T.T.61: Alien's magic
  2239. Tabs to spaces
  2240. Tail Call Optimization
  2241. Take a Number And Sum Its Digits Raised To The Consecutive Powers And ....¡Eureka!!
  2242. Take an Arrow to the knee, Functionally
  2243. Take It or Leave It Interview Strategy
  2244. Take the Derivative
  2245. Takeshi's Castle Spy: Knock Knock
  2246. Talisman Board Game Combat System Checker
  2247. Tank coding #1 : simple AIM systems
  2248. Tap Into Mr. Mxyzinjin's Brain
  2249. Tap Into Mr. Mxyzinjin's Matrix
  2250. Tap Into Mr. Mxyzinjin's Safe
  2251. Tap into Mr. Mxyzinjin's Stream
  2252. Tap Into Mr. Mxyzinjin's Toy Safe
  2253. Tap into Reivhax's robot
  2254. Temp Tracker: Max, Min, Mean and Mode
  2255. Template Strings
  2256. Test for semiprime (Mathematics)
  2257. Test Your Knowledge Of Function Scope
  2258. Test's results
  2259. Testing Palindromes
  2260. Testing the Porges hypothesis
  2261. Texas Hold'em Hands
  2262. Text align justify
  2263. Text editor feature!
  2264. The 'if' function
  2265. The (nearly) Perfect Mirror
  2266. The 196-algorithm and Lychrel numbers
  2267. The answer to life the universe and everything.
  2268. The Answer to the Ultimate Question of Life, The Universe, and Everything
  2269. The Arpeggiator
  2270. The average length
  2271. The Baby Years III - First Tooth
  2272. The boolean order
  2273. The common directory path
  2274. The Coupon Code
  2275. The Cube Structure
  2276. The Deca Tree
  2277. The Desperate Rocket Scientist
  2278. The Enigma Machine - Part 1: The Plugboard
  2279. The fusc function -- Part 1
  2280. The fusc function -- Part 2
  2281. The good old olden early years
  2282. The Great Game
  2283. The Great Pyramid of Giza
  2284. the hidden thief
  2285. The Ice Cream Vendors Dilema
  2286. The Ladies of ENIAC
  2287. The Lamp
  2288. The largest "mirror"
  2289. The learning game - Machine Learning #1
  2290. The longest bracket substring in the string
  2291. The map and the keys
  2292. The maximum sum value of ranges -- Ultimate version
  2293. The mean of two means
  2294. The money in the bank
  2295. The most asked question on CodeWars
  2296. The Most Repeated Letter.
  2297. The Most Sacred of Days
  2298. The nth smallest integer
  2299. The observed PIN
  2300. The Office I - Outed
  2301. The Office II - Boredom Score
  2302. The Office VII - Expression of Interest
  2303. The old switcheroo
  2304. The old switcheroo 2
  2305. The Overlap Time
  2306. The Owls Are Not What They Seem
  2307. The Park Ranger's Umbrella
  2308. The Power of Exponents
  2309. The Prediction
  2310. The Queen Of Hearts Challenge
  2311. The queen on the chessboard
  2312. The range() function
  2313. The rarest pepe
  2314. The real size of a multi-dimensional array
  2315. The Rhinestone Cowboy ~ Count the dollars in his boots!
  2316. The Shell Game
  2317. The sortReloaded() method
  2318. The Sum and The Rest of Certain Pairs of Numbers have to be Perfect Squares (more Challenging)
  2319. The Supermarket Queue
  2320. The Tale of Two Zeros
  2321. The ugly truth about reduce
  2322. The ugly truth about reduce (ii)
  2323. The ugly truth about reduce (iii)
  2324. The unknown but known variables: Addition
  2325. The Walker
  2326. The wheat/rice and chessboard problem
  2327. There are two kinds of people
  2328. They say that only the name is long enough to attract attention. They also said that only a simple Kata will have someone to solve it. This is a sadly story #1: Are they opposite?
  2329. Thinkful - Logic Drills: Red and bumpy
  2330. Thinkful - Number Drills: Blue and red marbles
  2331. Thinkful - Object Drills: Vectors
  2332. Thinkful - String Drills: Hello, World
  2333. Thinkful - String Drills: Repeater level 2
  2334. Thinking & Testing #38: What's the "?"
  2335. Thinking & Testing : Archery contest
  2336. Thinking & Testing : A happy day will come
  2337. Thinking & Testing : Digital swimming pool
  2338. Thinking & Testing : Falsetto Rap Concert
  2339. Thinking & Testing : From nothingness To nothingness
  2340. Thinking & Testing : Hail and Waterfall
  2341. Thinking & Testing : How many "word"?
  2342. Thinking & Testing : How many blocks?
  2343. Thinking & Testing : I hate big and small
  2344. Thinking & Testing : Incomplete string
  2345. Thinking & Testing : Love Forever
  2346. Thinking & Testing : Math of Middle school
  2347. Thinking & Testing : Math of Primary School
  2348. Thinking & Testing : Nebula or Vortex
  2349. Thinking & Testing : Not perfect? Throw away!
  2350. Thinking & Testing : Operator hidden in a string
  2351. Thinking & Testing : Report about something
  2352. Thinking & Testing : Retention and discard
  2353. Thinking & Testing : Retention and discard II
  2354. Thinking & Testing : Safe position
  2355. Thinking & Testing : Something capitalized
  2356. Thinking & Testing : Spatiotemporal index
  2357. Thinking & Testing : Sport Star
  2358. Thinking & Testing : Substring Magic
  2359. Thinking & Testing : Sum of 15(Hetu Luosliu)
  2360. Thinking & Testing : The repair of parchment
  2361. Thinking & Testing : True or False
  2362. Thinking & Testing : Uniq or not Uniq
  2363. Thinking & Testing : Who are you?
  2364. Thinking & Testing : Wind whispers
  2365. Thinking & Testing: A and B?
  2366. This is odd
  2367. This isn't what you think! The Misadventures of Bob the Highly Paid Consultant #2
  2368. THIS n' THAT
  2369. Three added Characters
  2370. Three Dots--Play game Series #8
  2371. Through the Maze
  2372. Throw from list - Error Handling #3
  2373. Thue-Morse Sequence
  2374. Tic-Tac-Toe Checker
  2375. Tic-Tac-Toe-like table Generator
  2376. Ticker
  2377. Tidy Number (Special Numbers Series #9)
  2378. Tidy up the toy shop - refactor with closure / revealing module pattern
  2379. Time Conversion (Minutes to 12-Hour Clock)
  2380. Time Conversion: 12s and 24s
  2381. Time Converter: hours, minutes, seconds and milliseconds
  2382. Time Degrees
  2383. Time formatting from input. Regex kata
  2384. Time Math
  2385. Time Simulation
  2386. Timers
  2387. To BrainFuck Transpiler
  2388. To Do List
  2389. toHonestlyFixed()
  2390. ToLeetSpeak
  2391. Tom's Allergies
  2392. Tombola - validation
  2393. Tombola teaser
  2394. Total Resistance in a Parallel Circuit
  2395. Touching Rectangles
  2396. Tower Defense: Risk Analysis
  2397. Tower of Hanoi
  2398. Track the Ball
  2399. Tracking Hits for Different Sum Values for Different Kinds of Dice
  2400. Tracking Sums in a Process
  2401. Train to remove duplicates from an array with filter()
  2402. Training JS #1: create your first JS function and print "Helloworld!"
  2403. Training JS #10: loop statement --for
  2404. Training JS #11: loop statement --break,continue
  2405. Training JS #12: loop statement --for..in and for..of
  2406. Training JS #13: Number object and its properties
  2407. Training JS #14: Methods of Number object--toString() and toLocaleString()
  2408. Training JS #15: Methods of Number object--toFixed(), toExponential() and toPrecision()
  2409. Training JS #16: Methods of String object--slice(), substring() and substr()
  2410. Training JS #17: Methods of String object--indexOf(), lastIndexOf() and search()
  2411. Training JS #18: Methods of String object--concat() split() and its good friend join()
  2412. Training JS #19: Methods of String object--toUpperCase() toLowerCase() and replace()
  2413. Training JS #2: Basic data types--Number
  2414. Training JS #20: Methods of String object--charAt() charCodeAt() and fromCharCode()
  2415. Training JS #21: Methods of String object--trim() and the string template
  2416. Training JS #22: Unlock new skills--Arrow function,spread operator and deconstruction
  2417. Training JS #23: methods of arrayObject---push(), pop(), shift() and unshift()
  2418. Training JS #24: methods of arrayObject---splice() and slice()
  2419. Training JS #25: methods of arrayObject---reverse() and sort()
  2420. Training JS #26: methods of arrayObject---map()
  2421. Training JS #27: methods of arrayObject---filter()
  2422. Training JS #28: methods of arrayObject---every() and some()
  2423. Training JS #29: methods of arrayObject---concat() and join()
  2424. Training JS #3: Basic data types--String
  2425. Training JS #30: methods of arrayObject---reduce() and reduceRight()
  2426. Training JS #31: methods of arrayObject---isArray() indexOf() and toString()
  2427. Training JS #32: methods of Math---round() ceil() and floor()
  2428. Training JS #33: methods of Math---max() min() and abs()
  2429. Training JS #35: methods of Math---log() and its family
  2430. Training JS #36: methods of Math---kata author's lover:random()
  2431. Training JS #37: Unlock new weapon---RegExp Object
  2432. Training JS #38: Regular Expression--"^","$", "." and test()
  2433. Training JS #39: Regular Expression--"?", "*", "+" and "{}"
  2434. Training JS #4: Basic data types--Array
  2435. Training JS #40: Regular Expression--"|", "[]" and "()"
  2436. Training JS #41: Regular Expression--""
  2437. Training JS #42: Regular Expression--( ?: ), ( ?= ) and ( ?! )
  2438. Training JS #5: Basic data types--Object
  2439. Training JS #6: Basic data types--Boolean and conditional statements if..else
  2440. Training JS #7: if..else and ternary operator
  2441. Training JS #8: Conditional statement--switch
  2442. Training JS #9: loop statement --while and do..while
  2443. Training Random Testcases #2: Palindrome string
  2444. Tram Capacity
  2445. Transform To Prime
  2446. Transformation iteration
  2447. Transforming Maze Solver
  2448. Translate DNA in 6 frames
  2449. Transpose of a Matrix
  2450. Transpose two strings in an array
  2451. Transposing a song
  2452. Traverse array elements diagonally
  2453. Treasure Box
  2454. Tree Depth
  2455. Tree Directory
  2456. Triangle Line Task: Fizz Buzz
  2457. Triangle of Multiples (Easy One)
  2458. Triangle type
  2459. Triangular matrices.
  2460. Tribonacci Sequence
  2461. Trinary
  2462. Triple Shiftian Numbers
  2463. Triple trouble
  2464. Troll Mystery Encoding
  2465. Truck driving time(Level I)
  2466. Trucks Driver Time.
  2467. True Addition
  2468. True Min
  2469. Trumpness detector
  2470. Truncate a string!
  2471. Try and Give me 5
  2472. Tube strike options calculator
  2473. Turn any word into a beef taco
  2474. TV channels
  2475. Twice Their Age
  2476. Two arrays -- Zero rows and zero columns
  2477. Two cube sums
  2478. Two's complement
  2479. Two's Complement
  2480. Type of sum
  2481. Typoglycemia Generator
  2482. UN-usual Sort
  2483. Unary function chainer
  2484. Understanding closures - the basics
  2485. Unicode Madness: 東方名確認　～ Eastern Title Validator.
  2486. UniDecoder
  2487. Union of Intervals
  2488. uniq -c (UNIX style)
  2489. Unique digits sequence
  2490. Unique string characters
  2491. Unique Sum
  2492. uniquePush - No Dupes!
  2493. Unit-Test Inception
  2494. Unix command line ls -l extract the file type.
  2495. Unlucky Days
  2496. Unpacking Arguments
  2497. Unsecure login - Hack this code #1
  2498. Unshackle the Beast (uncontrolled components in ReactJS)
  2499. up AND down
  2500. upperCasePlace()
  2501. Upside down numbers
  2502. Upside-Down Numbers - Challenge Edition
  2503. Upside-Down Pyramid Addition...REVERSED!
  2504. Upstream/Downstream
  2505. Upturn Numeral Triangle
  2506. Urban Dictionary
  2507. URI codec (encode/decode)
  2508. UriBuilder
  2509. UVB-76 Message Validator
  2510. Valid Curly Braces (Code Golf)
  2511. Valid GB number plate?
  2512. Valid HK Phone Number
  2513. Valid Parentheses
  2514. validDate Regex
  2515. Vending Machine
  2516. Vertical symmetry on coordinate plane
  2517. Visa application centre
  2518. Visible Dots On a Die
  2519. Vodka festival.
  2520. Volume of a Cuboid
  2521. Vowel Alternations
  2522. Vowel one
  2523. Vowel remover
  2524. Vowel Shifting
  2525. Vowel-consonant lexicon
  2526. Walk-up Stairs
  2527. Walter's miraculous FizzBuzz factory
  2528. Warm Up for Speed.
  2529. Warrior's adventure
  2530. Waving the Stream
  2531. We are Family
  2532. We are the Robots d[(0)(0)]b
  2533. We need these data immediately!
  2534. Weight of its Contents
  2535. Weighted Grading System
  2536. Weird Factory
  2537. Welcome to Economics! #1 Consumer Price Index
  2538. Welcome to Economics! #2 Economic Surplus
  2539. Well Done Multiplus
  2540. What comes after?
  2541. What Happened To My Object?
  2542. What happened to the vowels?
  2543. What is love?
  2544. What The Biggest Search Keys?
  2545. What's a Perfect Power anyway?
  2546. What's in a name?
  2547. What's the pattern?
  2548. What’s the degree?
  2549. When's my birthday ?
  2550. When's the next train to Brighton?
  2551. Where did my Ether go?
  2552. Where do they meet?
  2553. Where is my parent!?(cry)
  2554. Where is Vasya?
  2555. Where my anagrams at?
  2556. Which are in?
  2557. Which Gas Station should I pick?
  2558. Whitespace Interpreter
  2559. Who ate the cookie?
  2560. Who can still win the Formula One World Championship?
  2561. Who is going to pay for the wall?
  2562. Who wins the card game?
  2563. Who's the greatest?
  2564. Whole of Names
  2565. Whose bicycle?
  2566. WinH's Kata #2 - JavaScript Array-Parser
  2567. Word Challenges at School
  2568. Word Finder
  2569. Word Patterns
  2570. Word Segmentation: MaxMatch
  2571. Wordify an integer
  2572. Wordsearch
  2573. WordSquare
  2574. Working from Home - Lunchtime Beer
  2575. Working With Coloured Numbers
  2576. Working With Coloured Numbers II
  2577. Working with Dictionaries
  2578. World Bits War
  2579. World Rally Championship
  2580. Wrapped Function
  2581. Write a function to sort a given string into alphabetical order
  2582. Write a letter to your friend (给远方的朋友写封信)
  2583. Write JavaScript's 'call' function using apply.
  2584. Write out numbers
  2585. X marks the spot!
  2586. X plus Y Card problem
  2587. Xmas Tree
  2588. xml to object - xml #1
  2589. XOR string reduction
  2590. YaCG: #1 Yet another Card Kata !
  2591. YaCG: #2 One Trick, One Taker.
  2592. YaCG: #3 "no elephant were harmed..."
  2593. Year 2117: How many light-years?
  2594. Yes No Yes No
  2595. You are a Cube!
  2596. You Can't Code Under Pressure #2
  2597. You're not my type
  2598. Your Ride Is Here
  2599. Zebulan's Nightmare
  2600. Zero fill... for the Queen!
  2601. zero-balanced Array
  2602. Zero-plentiful Array
  2603. Zeros and Ones
  2604. Ziggurat Ride of Fortune
  2605. Zip it!
  2606. Zonk game
  2607. 象棋 (Xiangqi/Chinese Chess) Board Validator

Notes

Native BigInts in Node

Native BigInts are available in Node 10.x. JS versions of all BigInt katas (arithmetic operations to numbers represented as strings) should be removed once Node 8.x is deprecated in the future.

Though they should've been removed already anyway since bignumber.js is installed in the environment, which means require would have to be disabled. Which does nothing anyway because people can just copy the entire minified source code from the bignumber.js repo into their solution, and things go out of hand very quickly with this.

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