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List of JavaScript Kata to Update

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Blind4Basics edited this page Jan 5, 2023 · 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 or it -> assertions (i.e., assertions must be inside it, and it cannot be nested). Grouping related tests with describe is preferred if there are many test cases. Note that tests with an invalid test structure might still look valid in the output panel. 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  • it's never outdated because it forks from the kata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.

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.

List of Node 8.x Kata

  1. "AURUM RECLUDIT CUNCTA" - yet another FUBAR kata with restrictions which relies on specific setup of Node 8.
  2. "console.log" and the Lexical "this"
  3. "string".forEachMatch(regex, callback, [context]);
  4. "TRaduttore".tr( [ "u", "tt" ] , "it" )
  5. (Insane) N Warriors and a Lamp
  6. (Ready for) Prime Time
  7. [AI] Play Me : CodeWarsRunner I (Introduction)
  8. [AI] Play Me : CodeWarsRunner II (Acceleration)
  9. [BF] Even or Odd?
  10. [BF] Fibonacci Sequence
  11. [BF] Quine
  12. [BF] Reverse input
  13. [BF] Sort string
  14. [BF] Squares
  15. # Counting 1: I Want Some Subsets, Not All!
  16. #For Kids# Date decryption.
  17. #For Kids# Date encryption.
  18. #01 - Music theory - Minor/Major chords
  19. #1 Sequences: Pure Even Digit Perfect Squares (P.E.D.P.S)
  20. #4 Matrices: Process for a Square Matrix
  21. #6 Matrices: How Many Matrices Do These Elements Produce?
  22. #7 Matrices: Focused on the Contour
  23. #8 Matrices: Up and Down Sorting For Each Column
  24. 1 Two 3 Four 5!
  25. 1RM Calculator
  26. 1st day of month that are Sunday in a year range
  27. 2 DNAs sequences, coding for same protein?
  28. 2048!
  29. 5command - Esoteric programming #1
  30. 5x5 Tap Code
  31. 7-segment converter
  32. 80's Kids #1: How Many Licks Does it Take?
  33. 80's Kids #10: Captain Planet
  34. 80's Kids #2: Help ALF Find His Spaceship
  35. 80's Kids #3: Punky Brewster's Socks
  36. 80's Kids #4: Legends of the Hidden Temple
  37. 80's Kids #5: You Can't Do That on Television
  38. 80's Kids #6: Rock 'Em, Sock 'Em Robots
  39. 80's Kids #7: She's a Small Wonder
  40. 80's Kids #8: The Secret World of Alex Mack
  41. 80's Kids #9: Down in Fraggle Rock
  42. 8kyu interpreters: HQ9+
  43. A (no more) bugs trilogy: Episode 3 - Make a Player
  44. A Banking Trouble
  45. A bugs trilogy: Episode 1 - "Let Math.Random(); decide your future"
  46. A Crazy Robot? Who's is behind the scenes to make that?
  47. A for Apple
  48. A functional deck of cards....
  49. A kata is a kata, you can't say it's only a half!
  50. A Knight's Tour
  51. A Man and his Umbrellas
  52. A Memory game array
  53. A Promise is a Promise
  54. A simple Tic-tac-toe class
  55. A Taste of Curry
  56. Aaaaaand theeeeeen
  57. ABC - Esoteric programming #2
  58. Abstract Model Magic
  59. Accumulator Calculator
  60. ACME factory needs your help
  61. Acute, Obtuse, or Right?
  62. AD2070: Help Lorimar troubleshoot his robots- ultrasonic distance analysis
  63. AD2070: Help Lorimar troubleshoot his robots-Search and Disable
  64. Add Length
  65. Add new item (collections are passed by reference)
  66. Adding Arrays
  67. Adding Big Numbers
  68. Adding Binary Numbers
  69. Additionless addition.
  70. Additive Numbers
  71. Advanced Events
  72. After(?) Midnight
  73. Age Range Compatibility Equation
  74. Alex & snooker: points earned.
  75. Alex & snooker: scores.
  76. Alfred's Laundry Robot
  77. Algebraic Lists
  78. Aliens have landed
  79. All Balanced Parentheses
  80. All representations as binomial coefficient, or: How often in Pascal's Triangle ?
  81. All Star Code Challenge #12
  82. All Star Code Challenge #17
  83. All Star Code Challenge #18
  84. All Star Code Challenge #32
  85. All that is open must be closed...
  86. All unique
  87. Alphabet symmetry
  88. Alphabetic Anagrams
  89. Alphabetical Sequence
  90. Alphabetize a list by the nth character
  91. Alphametics Solver
  92. Alternate capitalization
  93. Alternate Square Sum
  94. altERnaTIng cAsE <=> ALTerNAtiNG CaSe
  95. Alternating Loops
  96. Alternative Truth Machine
  97. Am I safe to drive?
  98. Amidakuji
  99. Amount to Coins - Universal
  100. An 'orrible expression on 'is face
  101. An Eventful Bus
  102. Anagram difference
  103. And the Mosckar goes to…
  104. Angle-a-trons and Phyllotaxy
  105. Angular modules
  106. Anonymous Returns.
  107. Answering questions about data with Lo-Dash - 1
  108. Antipodal Points with Same Temperature
  109. AOP - After
  110. Apparently-Modifying Strings
  111. Apply offset to subtitles
  112. Approving Kata
  113. Approximate Fractions
  114. Are arrow functions odd?
  115. Are the values equal?
  116. Are there any arrows left?
  117. Are they the "same"?
  118. Are we alternate?
  119. Are You a One-Liner? #1: divide 2,3,5,7
  120. Are You a One-Liner? #2: multiplication table
  121. Are You a One-Liner? #3: A4 Paper
  122. Are you Geometric or Arithmetic? No, I´m both of them.
  123. Area and perimeter of the ellipse
  124. Area of a Circle
  125. Area of a Square
  126. Area of House from Path of Mouse
  127. Area or Perimeter
  128. Arguments to Binary addition
  129. Array combinations
  130. Array Deep Count
  131. Array element parity
  132. Array Graphics - Lines
  133. Array Info
  134. Array power
  135. Array reduction
  136. Array to HTML table
  137. Array.prototype.push
  138. Array.prototype.splice(from, count, insertItems...)
  139. Array.prototype.splice(from, count, insertItems...) - Advanced
  140. Arrays are Objects
  141. Arrays of cats and dogs
  142. Arrays of Lists of Sets
  143. Article archive and social likes
  144. Ascend, Descend, Repeat?
  145. Ascii Art Generator
  146. ASCII Games: Dance Dance Evolution I
  147. ASCII Games: Flood Fill (Player)
  148. ASCII Games: Warning: Ice!
  149. ASCII hex converter
  150. Assembler interpreter (part II)
  151. Assorted Rectangular Pieces Puzzle
  152. Atbash Cipher Helper
  153. ATM Heist
  154. Authenticate a list of usernames
  155. Auto Sorted Array - Easy
  156. Autocomplete! Yay!
  157. Automaton (Part 2)
  158. Automaton (Part 3)
  159. Automorphic Number (Special Numbers Series #6)
  160. Average Scores
  161. Back to KinderGarten (eeeeeeasy)
  162. Back to KinderGarten 3 : What's this list ? (easy?)
  163. Back to KinderGarten II : Where's Aïcha ? (eeeasy)
  164. Back to the Future?
  165. Balance the arrays
  166. Balance the parentheses
  167. Balance the tree
  168. Ball Launcher Robot
  169. Ball Roll On Quartic Polynomial
  170. Bar Graph - Graphing #1
  171. Barbell racking calculator
  172. Barbell weight
  173. Base64 Encoding
  174. Baseball
  175. Basic Compression
  176. Basic JS - Building a calculator
  177. Basic markdown to HTML
  178. Basic neural networks - Machine Learning #2
  179. Basics - Generators #1
  180. Basics 04: Rotate Matrix
  181. Basket of Fruits
  182. Batman Quotes
  183. Bầu cua tôm cá
  184. BBQ Pitmaster
  185. Be Concise I - The Ternary Operator
  186. Be Concise II - I Need Squares
  187. Be Concise III - Sum Squares
  188. Be Concise IV - Index of an element in an array
  189. Beautiful STAR
  190. BECOME IMMORTAL
  191. Beeramid
  192. Begin your day with a challenge, but an easy one.
  193. Beginner Series #2 Clock
  194. Behind Enemy Lines
  195. Berlin Clock
  196. Berserk rater: CG Vs. Clang
  197. Bet payout calculator
  198. Bicycle gear inch calculator
  199. Big Arithmetic - integer add/subtract
  200. Big Integer Modulo
  201. Big integers sum
  202. Big number problem
  203. Bin to Decimal
  204. Binary Genetic Algorithms
  205. Binary scORe
  206. Binary string
  207. Binary Swap
  208. Binary sXORe
  209. Binary to string
  210. Binary Zoo
  211. Binding within the List Monad
  212. BIO 2013 : Watching the Clock
  213. bit "Wise" #1: XOR-cism
  214. Bit calculator
  215. Bit Plane Return
  216. BitMath: Addition
  217. BitMath: Multiplication
  218. Bitty Words
  219. Blobservation
  220. Block-exchanging reverse
  221. Bloxorz Solver
  222. Boardgame Fight Resolve
  223. Bob - The Automated Manager
  224. Bob's Secret Cipher
  225. Body mass index calculation
  226. Boggle Word Checker
  227. Boolean logic from scratch
  228. Bouncing Ball
  229. Bracket Duplicates
  230. Brainscrambler - Esoteric programming #3
  231. Branch Prediction
  232. Breadcrumb Generator
  233. Breadth-First DOM Traversal
  234. Bribe the Guards of the Crown Jewels
  235. Broken Image - Puzzles #1
  236. Broken sequence
  237. Build a pile of Cubes
  238. Build a Trie
  239. Building a mini search engine
  240. Building a Sequence Cocatenating Digits with a Given Order.
  241. Building blocks
  242. Building Strings From a Hash
  243. Bulk up!
  244. Burrows-Wheeler transform I. Coding
  245. Burrows-Wheeler transform II. Decoding
  246. Buying a car
  247. Buying the Farm : Irrigation
  248. Caesar Cipher Encryption - Variation
  249. Caesar Cipher Helper
  250. Caffeine Script
  251. Calculate age in years
  252. Calculate Hypotenuse of Right-angled Triangle
  253. Calculate mean and concatenate string
  254. Calculate number of inversions in array in linearithmic time
  255. Calculate Price Excluding VAT
  256. Calculate the required interest rate
  257. Calculate Two People's Individual Ages
  258. Calculating Expected Utility
  259. Calculating with Functions
  260. Calculating with objects
  261. Calculator (Addition and Spaces) [Part 1]
  262. Calendar Week
  263. Callback Set
  264. Cambridge Word Scramble
  265. CamelCase Method
  266. Can I have cake?
  267. Can you get the loop ?
  268. Can you keep a secret?
  269. Can you move to Zephland?
  270. Can you test it for me?
  271. Candy count
  272. Candy problem
  273. Capitalize first letter of a string
  274. Capitals first!
  275. Car Door Roulette - Harder Version
  276. Card Counting
  277. Card game
  278. Card game: twenty-one
  279. Cartesian coordinates from degree angle
  280. Cartesian neighbors
  281. Cartesian neighbors distance
  282. Case Reversal of Consecutive Duplicates
  283. Catch me if you can (rolling start)
  284. Centroid I
  285. Champernowne's Championship
  286. Change it up
  287. char_to_ascii
  288. Character Concatenation
  289. Character limits: How long is your piece of string?
  290. Cheating a bit...
  291. Check a Curious Divisibility. (Brute force version)
  292. check for winning box in dots and boxes game
  293. Check if a triangle is an equable triangle!
  294. Check if number is prime without loops
  295. Check if two words are isomorphic to each other
  296. Check RNA Nucleotides
  297. Check three and two
  298. Check your arguments
  299. Checkerboard King Combo Move
  300. Chess piece values
  301. Chessboard Squares Under Queen's Attack
  302. Chicken Sexing
  303. Chinese Zodiac
  304. Chocolate Celebration
  305. Chocolate Party
  306. Choose featured projects for Gratipay's homepage!
  307. Christmas baubles on the tree
  308. Chuck Norris I - Push Ups
  309. Chuck Norris II - One Punch
  310. Chuck Norris VI - Shopping with Chuck
  311. Chuck Norris VII - True or False? (Beginner)
  312. Church numbers
  313. Cipher
  314. Circular Objects #1 - Running around in circles
  315. Class conundrum - Bug Fixing #7
  316. Classy Classes
  317. Classy Extentions
  318. Clay Pigeon Shooting
  319. Clean up your Gibberish!
  320. Clean your shoes rack
  321. Climbing the Leaderboard
  322. Clock Hands
  323. Clock Patience
  324. Closest and Smallest
  325. Closest elevator
  326. Closest friends
  327. Closest to Zero
  328. Clue - Esoteric programming #4
  329. Code Adventurer Guild: BeiJing
  330. Code Adventurer Guild: HongKong
  331. Code-ilocks. This exercise is JUST RIGHT!
  332. Codewars style ranking system
  333. Coding 3min : A*B=C
  334. Coding 3min : Are they symmetrical?
  335. Coding 3min : Balance Attraction
  336. Coding 3min : Count animals
  337. Coding 3min : Eat watermelon
  338. Coding 3min : Excel Puzzle #1
  339. Coding 3min : Excel Puzzle #2
  340. Coding 3min : Find the murderer
  341. Coding 3min : Guess the Hat
  342. Coding 3min : Hacker and change
  343. Coding 3min : Half it II
  344. Coding 3min : Half it III
  345. Coding 3min : Half it IV
  346. Coding 3min : Max Value
  347. Coding 3min : Parallel circuit
  348. Coding 3min : Planting Trees
  349. Coding 3min : Reading a Book
  350. Coding 3min : Remove screws I
  351. Coding 3min : Remove screws II
  352. Coding 3min : Series circuit
  353. Coding 3min : Tidy up the room
  354. Coding 3min : toLoverCase()
  355. Coding 3min : Waiting for a Bus
  356. Coding 3min: Bug in Apple
  357. Coding 3min: Collatz Array(Split or merge)
  358. Coding 3min: Father and Son
  359. Coding 3min: Give me the equation
  360. Coding 3min: Trypophobia
  361. Coding Meetup #10 - Higher-Order Functions Series - Create usernames
  362. Coding Meetup #15 - Higher-Order Functions Series - Find the odd names
  363. Coding with Squared Strings
  364. Collatz
  365. Collision Detection
  366. Color Ghost
  367. Color of the moment
  368. Colored Hexes!
  369. Coloured Lattice Points Forming Coloured Triangles
  370. Combine objects
  371. Combining Records
  372. Common array elements
  373. Common Bit Twiddles
  374. Compact data processing: bit comparison
  375. Compare powers
  376. Competitive eating scoreboard
  377. Complete The Pattern #10 - Parallelogram
  378. Complete The Pattern #11 - Plus
  379. Complete The Pattern #12
  380. Complete The Pattern #13
  381. Complete The Pattern #14
  382. Complete The Pattern #15
  383. Complete The Pattern #16
  384. Completed Mahjong Hands
  385. Complex numbers
  386. Composed Integers Having Prime Factors Only Once
  387. Composing squared strings
  388. Compound Nouns, Common Nouns, and Adjectives Test
  389. CompoundArray
  390. Compression : impossible
  391. Computational Geometry 101: Perimeter and Area of an arbitrary shape (2D)
  392. Compute a convex hull
  393. Compute the Largest Sum of all Contiguous Subsequences
  394. Compute Unix path
  395. Concatenating functions
  396. Concatenation substring
  397. Conference Traveller
  398. Config Parsing: INI
  399. Configure an express server
  400. Connect Four
  401. Connect Four: Unlimited Edition
  402. Connected blocks
  403. Connected blocks (second part)
  404. Consecutive Count
  405. Consecutive k-Primes
  406. Consecutive strings
  407. Conservative Property Proxy
  408. Consonant value
  409. Constrained GCD
  410. Contact Deduplication
  411. Contamination #1 -String-
  412. Control the Beast (controlled components in ReactJS)
  413. Convert an array of strings to array of numbers
  414. Convert Hash To An Array
  415. Convert PascalCase string into snake_case
  416. Convert Sentences to New York, my guy.
  417. Convert the score
  418. Converter
  419. Converting integer to currency format
  420. Conway's Game of Life - Unlimited Edition
  421. Coordinates Validator
  422. Coprimes up to N
  423. Cost of Shopping
  424. Count all the sheep on farm in the heights of New Zealand
  425. Count chains of ones in subsequences
  426. Count the Combinations
  427. Count the connected components
  428. Count the divisible numbers
  429. Count the number of cubes with paint on
  430. Count the Ones
  431. Count the smiley faces!
  432. Count The Zeros: 1 to n
  433. Count word occurrences
  434. Countdown - Longest Word
  435. Countdown to Christmas
  436. Counting DNA Nucleotides
  437. Counting Duplicates
  438. Counting E-Primes
  439. Counting in English one, two, three... to 2 Quadrillion (2,000,000,000,000,000)
  440. Counting Nested Functions
  441. Counting Sort
  442. Counting String Subsequences
  443. Covfefe
  444. Cracking CRC32
  445. Crash Override
  446. Crashing Boxes
  447. Cream of the crop
  448. Create 10x10 array and randomly fill each cell with "A", "B", "C", or "D"
  449. Create a frame!
  450. Create a House Cleaning Rota
  451. Create a password hashing function.
  452. Create Four Letter Birding Codes from Bird Names
  453. Create palindrome
  454. Create the base - Dungeon crawler #1
  455. Create Your Own "Promise.all()"
  456. Creating Elements with React
  457. Credit Card Checker
  458. Cross the Bridges
  459. Crossed words
  460. Crouching Distribution, Hidden Constant
  461. Crushing blows and blushing crows
  462. Cryptic Cave: Episode 1
  463. Cryptography Challenge - Log of Lights
  464. CSV representation of array
  465. Currency Conversion
  466. Currying functions: multiply all elements in an array
  467. Custom Array Filters
  468. Custom concat() Array Method
  469. Custom each() Array method
  470. Custom Setters and Getters
  471. Cut array into smaller parts
  472. Cut me in Pieces but in The Way I Like
  473. D&D Character generator #1: attribute modifiers and spells
  474. D&D Character generator #2: psion power points
  475. D&D Character generator #3: carrying capacity
  476. Dangerous Dates
  477. Dashatize it
  478. dataTypes String to Array
  479. Date Format Validation
  480. Date formatter
  481. Date Sanity Methods
  482. Dave's gamble.
  483. Days in the year
  484. Debug Sum of Digits of a Number
  485. Decibel Scale
  486. Decipher the Message
  487. Decipher this!
  488. Decode Morse
  489. Decode the Morse code
  490. Decode the Morse code, advanced
  491. Decode the Morse code, for real
  492. Decoded String by the Numbers
  493. Decompose double strand DNA into 6 reading frames
  494. Decreasing Inputs
  495. Decrypt this school cipher
  496. Deep Assignment
  497. Deep Freeze
  498. Defeat the Elemental Titans
  499. Defend your castle
  500. Deferred Objects
  501. Déjà vu Duplicates
  502. Delete occurrences of an element if it occurs more than n times
  503. Deletion in an array
  504. Delta Bits
  505. Depot organization 1
  506. Derive Cipher from Plaintext
  507. Describe the shape
  508. Design a simple markdown compiler with string substitution feature
  509. Determine Results of Pole Vault Competition
  510. Devil's Sequence
  511. DevOps legacy roasting -> disco inferno -> burn baby burn
  512. Diamonds and Toads
  513. Dice roll - D&D #1
  514. Dice Rolling
  515. Did she say hallo?
  516. Difference between two collections
  517. Difference Of Squares
  518. DigitAll
  519. Digits Average
  520. Disarium Number (Special Numbers Series #3)
  521. Distance Between 2 Points on a Cartesian Plane
  522. Distance from the average
  523. Distribute server workload
  524. Divide integers as strings
  525. Divide numbers as strings
  526. Divisible by previous digit?
  527. Divisor harmony
  528. DNA GC-content
  529. Do something "n.times" (Simplifying "for" loops)
  530. Do you speak "English"?
  531. Do you speak retsec?
  532. Dollars and Cents
  533. Dominant array elements
  534. Dominant primes
  535. Domino Tiling - 2 x N Board
  536. Domino Tiling - 3 x N Board
  537. Domino Tiling - 5 x 2N Board
  538. Domino Tiling - M x N Board with Holes
  539. Don't Drink the Water
  540. Don't Eat the Last Cake!
  541. Don't get stressed
  542. Don't rely on luck HARDCORE
  543. Dont drive too long!
  544. Doomsday Basic
  545. DOS era #1: Help!!!
  546. DOS era #2: Attrib
  547. Dota 2 Bots - Pudge's Meat Hook
  548. Double Rainbow!
  549. Double Trouble
  550. Down Arrow With Numbers
  551. Draw a Circle.
  552. Dream Or Reality
  553. Dreidel dreidel
  554. Driving Licence
  555. Driving School Series #2
  556. Drunk friend
  557. Drying Potatoes
  558. Duck Duck Goose
  559. Dude E Free
  560. Dumb News: The Truth About CW Leaderboard !
  561. Dummy Epoch - find the gap
  562. Duplicate Arguments
  563. Duplicates. Duplicates Everywhere.
  564. Easy Cyclist's Training
  565. Easy Diagonal
  566. Easy Line
  567. Easy mathematical callback
  568. Easy Time Convert
  569. Echo
  570. Elections: Weighted Average
  571. Element equals its index
  572. Elevator algorithm
  573. Elevator Distance
  574. Elevator with call buttons
  575. Ellipse contains point?
  576. Elo rating - one game, one pair
  577. Email Validation
  578. Emily's Eccentric Encoding
  579. Emirps
  580. English beggars
  581. Enumerable Magic - Does My List Include This?
  582. Enumerable Magic #1 - True for All?
  583. Enumerable Magic #4 - True for None?
  584. Enumerable Magic #5- True for Just One?
  585. Equation Discovery
  586. Equivalent Dice
  587. Error Throwing - Error Handling #2
  588. ES2015: Get the real length of string. 
  589. ES6 string addition
  590. Escape the maze
  591. Esolang Interpreters #1 - Introduction to Esolangs and My First Interpreter (MiniStringFuck)
  592. Especially Joyful Numbers
  593. esrever esreveR!
  594. Euclidean distance in n dimensions
  595. Evaluate a postfix expression
  596. Even Binary Sorting
  597. Even numbers in an array
  598. Even odd disparity
  599. Even Odd Pattern #1
  600. Every archer has its arrows
  601. Every possible sum of two digits
  602. Everything Is Even
  603. Evil Autocorrect Prank
  604. Excel sheet column numbers
  605. Exclamation marks series #4: Remove all exclamation marks from sentence but ensure a exclamation mark at the end of string
  606. Exclusive "or" (xor) Logical Operator
  607. Exclusive presentations
  608. Expression Transpiler
  609. Expressive Objects
  610. Extended weekends
  611. Extended Weekends - Challenge Edition
  612. Extending JavaScript Objects: Contains Method
  613. Extending JavaScript Objects: Get First & Last Array Element
  614. Extending JavaScript Objects: Reverse String
  615. Extending JavaScript Objects: Simple Math Methods
  616. Extra Perfect Numbers (Special Numbers Series #7)
  617. extract file name
  618. Extract the IDs from the data set
  619. Fabergé Easter Eggs crush test
  620. Fac Recursion (Pest control - find the bugs and fix them)
  621. Factorial
  622. Factorial length
  623. Factory Functions #1 - Creating profile for people
  624. Factory Functions #2 - Inheritance and Object Composition
  625. Failed Filter - Bug Fixing #3
  626. Failed Sort - Bug Fixing #4
  627. Fake website #1: Choose a good name for the website
  628. Fake website #2: Choose a best server to create website
  629. Fake website #3: Choose a cool color for the web site
  630. Fake website #4: Design a strict user registration verification function
  631. Fake website #6: Design an automatic beta katas processing function
  632. Fame Of All
  633. Fast/Precise Natural Logarithm
  634. Fastest Code : A*B=C
  635. Fastest Code : Count animals
  636. Fastest Code : Equal to 24
  637. Fastest Code : Excel Puzzle #2
  638. Fastest Code : Half it III
  639. Fastest Code : Half it IV
  640. Faulty Data Recovery
  641. Feed Kahumolings!
  642. Feynman's square question
  643. Fibo akin
  644. Fibonacci Generator
  645. Fibonacci on roids
  646. Fibonacci, Tribonacci and friends
  647. Fifa 17 Launch
  648. Figure Out the Notes
  649. File Finder
  650. File Size Trouble!
  651. Fill in the gaps in my timesheet.
  652. Filling an array (part 1)
  653. Filling an array (part 2)
  654. Filter out for good!
  655. Filter valid romans
  656. Financing Plan on Planet XY140Z-n
  657. Find Cracker.
  658. Find a Bunch of Common Elements of Two Lists in a Certain Range
  659. Find a Very Special Set Of Numbers In a Certain Range
  660. Find All Array Values That Fall Within a Given Difference
  661. Find all non-consecutive numbers
  662. Find all occurrences of an element in an array
  663. Find an area
  664. Find array
  665. Find Factors Down to Limit
  666. Find Fibonacci last digit
  667. Find Grid Position
  668. Find heavy ball - level: conqueror
  669. Find heavy ball - level: master
  670. Find heavy ball - level: novice
  671. Find heavy ball - level: ubermaster
  672. Find last Fibonacci digit [hardcore version]
  673. Find me the names
  674. Find min and max
  675. Find Multiples of a Number
  676. Find Nearest square number
  677. Find number in an array # 2
  678. Find number in an array # 3
  679. Find number in an array # 4
  680. Find number in an array # 5
  681. Find number in an array # 6
  682. Find Number With Maximum Number Of Divisors
  683. Find Numbers with Same Amount of Divisors
  684. Find out the longest string chain
  685. Find out whether the shape is a cube
  686. Find sum of top-left to bottom-right diagonals
  687. Find the area of the rectangle!
  688. Find the calculation type
  689. Find the Capitals
  690. Find the discounted prices
  691. Find The Duplicated Number in a Consecutive Unsorted List - Tougher Version
  692. Find the force of gravity between two objects
  693. Find the Golden Ticket!
  694. Find the hobbits!
  695. Find the Integral
  696. Find the Location for the Wildlife Study
  697. Find the longest gap!
  698. Find The Max Sum Of Contiguous-Submatrix In a Matrix - Ultimate Version
  699. Find the Middle of the Product
  700. Find the Mine!
  701. Find the missing element between two arrays
  702. Find the missing term in a Geometric Progression
  703. Find the missing term in an Arithmetic Progression
  704. Find the Most Probable Sum Value or Values, in Rolling N-dice of n Sides
  705. Find the motif in DNA sequence.
  706. Find the Nexus of the Codewars Universe
  707. Find the Nth longest string in an Array
  708. Find the odd int
  709. Find The Parity Outlier redux
  710. Find the position!
  711. Find the smallest
  712. Find the sum of the roots of a quadratic equation
  713. Find the Word Pair!
  714. Find Transcription Factors
  715. Find whether there is a route between two nodes in a graph
  716. Find within array
  717. Find X
  718. Finding North
  719. Finding Remainder Without Using '%' Operator
  720. Finding the Closest Maximum Values of a Function to an Upper Limit
  721. Finish this Mini Sudoku
  722. First n Prime Numbers
  723. First-Class Function Factory
  724. Fix arithmetic progression
  725. Fix array sequence
  726. Fix string case
  727. Fix your code before the garden dies!
  728. Fixed length palindromes
  729. FIXME: Get Full Name
  730. Fizz Buzz - Without ifs
  731. Fizz Buzz Reloaded
  732. FizzBuzz Backwards
  733. Flexible Card Game
  734. Flight incident probabilities
  735. Floating-point Approximation (II)
  736. FloatStream
  737. Fly as fast as you can
  738. Follow that Spy
  739. Following Sierpinski's Footprints
  740. Following the Paths of Numbers Through Prime Factorization
  741. Food combinations
  742. For the sake of argument
  743. For Twins: 1. Types
  744. For UFC Fans (Total Beginners): Conor McGregor vs George Saint Pierre
  745. Format data value
  746. Format Text
  747. Forming a Magic Square
  748. Four Pass Transport
  749. Foxes and rabbits
  750. Free pizza
  751. Frequency Analysis With Buckets
  752. Freudian translator
  753. Friday the 13th Part 1
  754. Frugal Pizza
  755. Fruit Machine
  756. Fruit string calculator
  757. Fuel economy converter (mpg <-> L/100 km)
  758. Fuel usage reporting
  759. Fun with ES6 Classes #1 - People, people, people
  760. Fun with ES6 Classes #2 - Animals and Inheritance
  761. Fun with ES6 Classes #3 - Cuboids, Cubes and Getters
  762. Fun with ES6 Classes #4 - Cubes and Setters
  763. Function Cache
  764. Function Wrappers: Inline Testing
  765. Function Wrappers: pool
  766. Function.prototype.clone
  767. Functional Addition
  768. Functional Binary Trees
  769. Functional Lists
  770. Functions of Integers on Cartesian Plane
  771. functions waterfall!
  772. Funny jubilees
  773. Future
  774. Game Hit the target - 2nd part
  775. Gaussian primes
  776. Generate a random number (the hard way!)
  777. Generate An Array of Unique Strings
  778. Generate range of integers
  779. Generate user links
  780. Generating Generators - Generators #3
  781. Generic Ball Clock
  782. Genetic Algorithm Series - #1 Generate
  783. Genetic Algorithm Series - #3 Crossover
  784. Geohashing
  785. Geometric Mean I
  786. Geometric Progression Sequence
  787. Geometry Basics: Circle Area in 2D
  788. Geometry Basics: Distance between circles in 2D
  789. Geometry Basics: Distance between points in 3D
  790. Geometry Basics: Triangle Area in 2D
  791. Geometry Basics: Triangle Perimeter in 2D
  792. Gerrymander Solver
  793. Get all array elements except those with specified indexes
  794. Get angle between hour and minute hands
  795. Get array elements with specified keys
  796. get ascii value of character
  797. get character from ASCII Value
  798. Get Password from grid
  799. Get root property name
  800. Get Smallest Common Factor
  801. Get the Excel column title!
  802. Get the Grid Coordinates
  803. Get your steppin' on son
  804. Get Zodiac Sign
  805. Getting along with Bernoulli's numbers
  806. Give me a Diamond
  807. Give me DST !!!
  808. Give me the k first digits. Odd digits.
  809. Global estimates
  810. Goldbach’s Conjecture
  811. Gotta start somewhere - Code Tracker #1
  812. GPS Navigation
  813. Grandpa's pants
  814. Graphics Series #1: barcode EAN-13 part1
  815. Graphics Series #2: barcode EAN-13 part2
  816. Graphics Series #3: Repair the LED display
  817. Graphics Series #4: Fireworks
  818. Graphics Series #5: The rope is burning
  819. Graphics Series #6: Traffic lights check
  820. Grasshopper - Function syntax debugging
  821. Grasshopper - Object syntax debug
  822. Grasshopper - Terminal Game #1
  823. Greatest Common Factor of an Array
  824. Greatest Difference
  825. Green Glass Roof- Puzzles #6
  826. Grocer Grouping
  827. Group Repeating Fractions
  828. Gryffindor vs Slytherin Quidditch Game
  829. Guess the array
  830. Guess the list pattern #2
  831. Guess the number!
  832. Hack My Account!
  833. Hacker's job
  834. Haiku Wizard
  835. Half Life
  836. Hall Of Fame
  837. Hamming(7,4) code - Message encoding
  838. Hamster me
  839. Handy Toolbox for Kata authors
  840. Hangman
  841. Hangman game
  842. Hangŭl Unicode From Jamo Values
  843. Hannah vs. Snooze Button
  844. Happy New Year, 2018 !!
  845. Happy numbers
  846. Happy numbers to the n power
  847. Hard Time Bomb
  848. Harry and the Mathematician's Chicken
  849. Haskell scanl function
  850. heggeleggleggo
  851. Hello Happy Codevarrior!
  852. Help Mrs Jefferson
  853. Help Green Lantern with his web site
  854. Help Kiyo きよ solve her problems LCM Fun!
  855. Help Mr. E
  856. Help Mr... Dr. Strange to bargain!
  857. Help Suzuki pack his coal basket!
  858. Help Suzuki purchase his Tofu!
  859. Help the general decode secret enemy messages.
  860. Help your fellow warrior!
  861. Help Yumi collect all the rings. Part 1
  862. Heroes of Might & Magic II: One-on-One
  863. Heroes of Might & Magic II: Chain Lightning
  864. Hex class
  865. Hex to base64
  866. Hex Word Sum
  867. hidden key
  868. Hide from the Sun
  869. Hide password from jdbc url
  870. Hide phone numbers
  871. Highest number with two prime factors
  872. Hit Count
  873. Hofstadter Q
  874. Hold'em Holecard Combinatorics
  875. Holiday IV - Leg Room
  876. Holiday VI - Shark Pontoon
  877. Holiday X - Bintang Vests
  878. Hollow Triangle
  879. Homogenous arrays
  880. Horror Top Trumps (card game)
  881. House of cards
  882. How deep do these trees even go?
  883. How far can you pedal a bike???
  884. How Green Is My Valley?
  885. How long should you cook this for?
  886. How long will it take the train to reach its final destination?
  887. How low do you go?
  888. How many consecutive numbers are needed?
  889. How many cows do you have?
  890. How Many Differences of Squares?
  891. How many dots are covered
  892. How many eggs?
  893. How many feelings?
  894. How many numbers III?
  895. How Many Numbers?
  896. How Many Numbers? II
  897. How many palindromes can you find ? (performance)
  898. How many times should I go?
  899. How much coffee do you need?
  900. How much Wood?
  901. How old will I be in 2099?
  902. HTML DOM: Part 1 - Tree
  903. HTML DOM: Part 2 - Attributes
  904. Human Friendly Random Numbers
  905. Human readable duration format
  906. Human readable working hours
  907. Hungarian Vowel Harmony (harder)
  908. I guess this is a 6kyu kata #10: Emotion of sentences
  909. I guess this is a 6kyu kata #2: Merge strings
  910. I guess this is a 6kyu kata #3: Trim the Christmas tree
  911. I guess this is a 6kyu kata #5: Whac-A-Mole
  912. I guess this is a 7kyu kata #1: Search result
  913. I guess this is a 7kyu kata #4: Find 0 and 1
  914. I guess this is a 7kyu kata #6: Fruit Ninja I
  915. I love big nums and I cannot lie
  916. I need a lookup quick!
  917. I need more speed!
  918. I Promise Not To Optimize
  919. I Spy
  920. I'm already Tracer
  921. I'm longer than you!
  922. Ideal electron distribution
  923. Identify the array's ordering
  924. Image Files Only
  925. Image Processing
  926. Imaginary Base Conversion
  927. Imperfect Fibonacci Rabbits
  928. Imperfect Network #1 (duplicate messages)
  929. Imperfect Network #2 (out-of-order messages)
  930. Implement "The Match" to assign med school graduates to hospitals
  931. Implement brute force protection
  932. Implement Debounce
  933. Implementing a Queue
  934. Implementing a Queue - Performance Version
  935. Implied Probability from Fractional Betting Odds
  936. Indexed capitalization
  937. Infinite Diceworks: MeanMaxing your rolls
  938. Infinite Diceworks: MeanMaxing your rolls (Quantum Mechanically)
  939. Infinite Sequences
  940. Ins and Outs--Play game Series #6:
  941. Insane Coloured Triangles
  942. Insane Permutation Promenade (from AoC 2017 Day 16)
  943. Insert Dashes 2
  944. Insert into xml object - xml #3
  945. Insert value into an array
  946. Inserting multiple strings into another string
  947. Inspiring Strings
  948. Instant Runoff Voting
  949. Integer depth
  950. Integer reduction
  951. Integer to Musical Pitch Classes
  952. Integer triangles
  953. Integer Triangles Having One Angle The Double of Another One
  954. Integer with the longest Collatz sequence
  955. Integers Sum Square
  956. Interactive Dictionary
  957. Interesting Pyramid
  958. Interlaced Spiral Cipher
  959. Invalid Input - Error Handling #1
  960. IP Validation
  961. IPv6 address validation and contraction
  962. IPv6 validator
  963. Is a Prime?
  964. Is Divisible By 6 Mk II
  965. Is Integer Array?
  966. Is It In?
  967. Is n divisible by (...)?
  968. Is there a sequence re-occuring in the list
  969. Is there an arrow missing ? (Relations - Part1: Reflexivity)
  970. Is this working?
  971. Is Undefined?
  972. Is your period late?
  973. isAN(value)
  974. isInt32(int, byteLength)
  975. ISRC - Significant Figures
  976. isReallyNaN
  977. It's Full of Stars
  978. Iterative Rotation Cipher
  979. Japanese Romaji-to-Hiragana Converter
  980. Java format Unicode encoder/decoder
  981. JavaScript class-like objects
  982. Javascript filter - 1
  983. Javascript filter - 2
  984. Javascript filter - 3
  985. Javascript from the Inside #1 : Map
  986. Javascript from the Inside #2: Filter
  987. Javascript Mathematician
  988. JavaScript seems to be broken
  989. Jewel Thief
  990. John and Ann sign up for Codewars
  991. Join command (simplified)
  992. Jokes you've been 'awaiting' for ... promise
  993. Josephus Permutation
  994. Josephus Survivor
  995. JS Golfing #1: undefined
  996. JS Golfing #2: Math.floor
  997. JS Golfing #3: Math.round
  998. JS Golfing #4: Math.random
  999. JS Golfing #5: A Million Times
  1000. JS Golfing #6: String Summation
  1001. JS Golfing #7: Join
  1002. JS Golfing #8: Is it Uppercase?
  1003. JSON Account Updater
  1004. JSON Parser
  1005. Jumble words
  1006. Jump!
  1007. Jumping Kangaroos
  1008. Jumping Number (Special Numbers Series #4)
  1009. Jurassic Word
  1010. Just Adding and Multiplying
  1011. Kama Sutra Cipher Helper
  1012. Kaprekar Split
  1013. Kaprekar's Routine
  1014. Karnaugh's detonating timer (a k-map primer)
  1015. Kata Impossible I - The Impossible Lottery
  1016. Kebabize
  1017. Keypad horror
  1018. Keys, their drawings and ancient symbols
  1019. Keyword Cipher Helper
  1020. Kids and candies
  1021. KISS - Keep It Simple Stupid
  1022. Knapsack Part 1 - The Greedy Solution
  1023. Kushim the Accountant: Extract $ values from text
  1024. L1: Bartender, drinks!
  1025. Large Factorials
  1026. Larger Product or Sum
  1027. Largest Cross Sum
  1028. Largest Elements
  1029. Largest Palindromic Product
  1030. Largest product in a series
  1031. Last
  1032. Last and rich in circle
  1033. Last Digit of an Array
  1034. Last digit of a huge number
  1035. Last digit symmetry
  1036. Lat/Long Parser
  1037. Laxative Shot Roulette
  1038. Lazy Chain
  1039. Lazy evaluation
  1040. Left$ and Right$
  1041. Let's Play Darts!
  1042. Lexicographic Permutations
  1043. Life without primes
  1044. Limit string length - 1
  1045. Line Segments Intersection Point
  1046. Line, Normalization
  1047. Linear Equation Solver
  1048. Linear Regression of Y on X
  1049. Link Up--Play game Series #7
  1050. Linux history and ! command. Series#1 The !! command
  1051. Linux history and ! command. Series#2 The !n command
  1052. Linux history and ! command. Series#3 The !-n command
  1053. Linux history and ! command. Series#4 The !string command
  1054. Linux history and ! command. Series#5 The !?string command
  1055. List Comprehensions
  1056. Lists and Objects - Top Trump Optimizer
  1057. Live and Let Dice ...roll
  1058. Live Chess Ratings
  1059. Localize The Barycenter of a Triangle
  1060. Logic Calculator - Puzzles #3
  1061. Logical Disjunctions
  1062. Logistic Map
  1063. Long Division
  1064. Longest Consecutive Sequence of Squares
  1065. Longest palindrome
  1066. Longest Word in Dictionary
  1067. Loose Change
  1068. Loose Change!
  1069. Lost number in number sequence
  1070. Lottery machine
  1071. Lowercase strings in array
  1072. Lowest product of 4 consecutive numbers
  1073. LRU Cache
  1074. Lucas numbers
  1075. Lucas-Lehmer Test for Mersenne Primes
  1076. Lucky Sevens
  1077. Lychrel numbers
  1078. LZW Compression - Squeeze that data!
  1079. LZW Compression (and decompression)
  1080. Mad Max: Recursion Road
  1081. Madhav array
  1082. Magic Square Validator
  1083. Magic The Gathering #2: Mana
  1084. Magic The Gathering #3: Spell Stack
  1085. Mahjong - #2 Seven-pairs
  1086. Mahjong - #3 How far from winning
  1087. Mahjong - #4 Play with imagination!
  1088. Mahjong winning hand Validation #1: DA SI XI(大四喜)
  1089. Mahjong winning hand Validation #2: DA SAN YUAN(大三元)
  1090. Mahjong winning hand Validation #4: JIU LIAN BAO DENG(九莲宝灯)
  1091. Mahjong winning hand Validation #5: YI SE SI BU GAO(一色四步高)
  1092. Make a 1 to n sequence
  1093. Make a Palindrome
  1094. Make a square box!
  1095. Make Object Into Iterable Array
  1096. Make the Deadfish Swim
  1097. Make the small words big!
  1098. Making Change
  1099. Making Change: Part 2
  1100. Making Copies
  1101. Making squares with lines
  1102. Man in the west
  1103. Manage the Robot Factory: Day 1
  1104. Manipulate URL Parameters
  1105. Many Maps As One
  1106. Map and Filter to Get a Special Sequence of Integers
  1107. Map function issue
  1108. Marching armies
  1109. Markings to White Triangles and How to Find Them
  1110. Masquerade Waiting Line
  1111. Master your primes: sieve with memoization
  1112. Math Issues
  1113. Math Object Madness
  1114. Matrix creation
  1115. Matrix Multiplier
  1116. Matrix Rotation
  1117. Matrix Square Up, B!
  1118. Max number of people and year in a specific place
  1119. Max-min arrays
  1120. Maxed Out
  1121. Maximum Product of Parts
  1122. Maximum Product
  1123. Maya Number Converter
  1124. Memesorting
  1125. Memoized Log Cutting
  1126. Memory Reallocation
  1127. Merge two arrays
  1128. MergeSort "merge" function
  1129. Message from Aliens
  1130. Meta-Kata: Duplicate Detector v0.1
  1131. Metaprogramming: Lisp-style Generic Functions
  1132. Mid-Endian numbers
  1133. Midpoint inception
  1134. Midtown Navigator
  1135. Miles per gallon to kilometers per liter
  1136. Milliseconds
  1137. Min or Max of . . .
  1138. Mind the Gap
  1139. Mine Sweeper
  1140. Minimum dollar bill's count
  1141. Minimum Number of Coins
  1142. Minimum path in squares
  1143. Minimum Reduction
  1144. Minimum Steps (Array Series #6)
  1145. Minimum unfairness of a list/array
  1146. Miracle Sort
  1147. Missing Alphabet
  1148. Missing Angle
  1149. Missing number in Unordered Arithmetic Progression
  1150. Mission: Hidden Message
  1151. Mixbonacci
  1152. mkdir -p
  1153. Mnemo Passwords : pwgen
  1154. Mnemonic Lookup
  1155. Modulo operations of big Numbers
  1156. Monads: The Maybe Monad
  1157. Monads: The list monad
  1158. Money Match: Double or Nothing
  1159. Mongodb ObjectID
  1160. Monkey Talk
  1161. Monkey Tennis - The Aftermath
  1162. Monkey's MATH 01: How many "ZERO"s?
  1163. MONTE CARLO 3D
  1164. month name story
  1165. Months, Weeks, Days, Hours and Minutes
  1166. Most Consecutive Zeros of a Binary Number
  1167. Most frequently used words in a text
  1168. Mount Events in ReactJS
  1169. Moves in squared strings (I)
  1170. Moves in squared strings (II)
  1171. Moves in squared strings (III)
  1172. Moves in squared strings (IV)
  1173. MTV Cribs
  1174. Multi Line Task: Fizz Buzz
  1175. Multi Line Task: GCD Function
  1176. Multi Line Task++: Hello World
  1177. Multi Line Task∞: Hello World
  1178. Multiple implications
  1179. Multiple remainder of the division
  1180. Multiples by permutations
  1181. Multiples By Permutations II
  1182. Multiples of 3 and 5 redux
  1183. Multiplication - Generators #2
  1184. Multiplicative Persistence... What's special about 277777788888899?
  1185. Multiply list by integer (with restrictions)
  1186. Multiply the number
  1187. Multiply Word in String
  1188. multiply(value, times)
  1189. Mutate My Strings
  1190. Mutual Recursion
  1191. myjinxin katas #001 : Rotate, Remove, Return
  1192. myjinxin katas #002 : Hotel room number
  1193. myjinxin katas #003 : Crossword puzzle
  1194. myjinxin katas #004 : Soldier's queue training(easy version)
  1195. myjinxin katas #005 : Age Of Wind
  1196. myjinxin's Fairy tales #001 : Aladdin's lamp and three wishes
  1197. myjinxin's Fairy tales #002 : Ali Baba and the Forty Thieves I
  1198. myjinxin's Fairy tales #003 : Ali Baba and the Forty Thieves II
  1199. myjinxin's Fairy tales #004 : Ali Baba and the Forty Thieves III
  1200. myjinxin's Fairy tales #005 : The little match girl
  1201. Mystery Function
  1202. Mystery function #1
  1203. Mystery function #2
  1204. N High Scores
  1205. N smallest elements in original order
  1206. n-Bonacci Ratio
  1207. N-centered Array
  1208. N-Parasitic Numbers Ending in N
  1209. N00bify - English to n00b Translator
  1210. Name Array Capping
  1211. Name on billboard
  1212. Name That Integer
  1213. Name to Matrix
  1214. Natas Recipes
  1215. NATO Phonetic Alphabet
  1216. Natural Log Approximator
  1217. Naughty or Nice?
  1218. Needles in a haystack
  1219. Negation of a Value
  1220. Nesting Structure Comparison
  1221. new Deck() of Cards
  1222. new IntStorage(byteLength, ints).read(from, count);
  1223. new IntStorage(byteLength).write(value, length)
  1224. new with apply
  1225. Next Featured Number Higher than a Given Value
  1226. Next Largest Value (by rearranging the last digit and the last by one if neccessary)
  1227. Next Palindromic Number.
  1228. Next smaller number with the same digits
  1229. Nickname Generator
  1230. NIM the game
  1231. Ninety Nine Thousand Nine Hundred Ninety Nine
  1232. Ninja vs Samurai: Strike
  1233. No Loops 1 - Small enough?
  1234. No Loops 2 - You only need one
  1235. No Return #2: Test the Devices
  1236. No Return #3: Solve the Equation
  1237. Node.js Async I/O
  1238. Non Decomposable Primes as Sums of Perfect Squares
  1239. Non-even substrings
  1240. None shall pass
  1241. noobCode 03: CHECK THESE LETTERS... see if letters in "String 2" are present in "String 1"
  1242. noobCode 04: HOT SINGLES...compare two arrays, return the unpaired items !
  1243. Normal number
  1244. Normalizing Out of Range Array Indexes
  1245. Not all but sometimes all
  1246. Not prime numbers
  1247. Not Quine
  1248. Not so black box
  1249. Not that obvious summation
  1250. Not very secure
  1251. Now that's a crib!
  1252. Noye's Fludde
  1253. NSA Phone Tapping
  1254. NSA's Little Puzzle
  1255. nth Floyd line
  1256. Nth Smallest Element (Array Series #4)
  1257. Nth term - Linear Sequences
  1258. Nuclear Missile Manager
  1259. Number , number ... wait LETTER !
  1260. Number climber
  1261. Number Decoding
  1262. Number Manipulation I (Easy)
  1263. Number of anagrams in an array of words
  1264. Number of Folds
  1265. Number of measurements to spot the counterfeit coin
  1266. Number of Palindromic Substrings
  1267. Number of Proper Fractions with Denominator d
  1268. Number Shortening Filter
  1269. number with 3 roots.
  1270. Number-like counter
  1271. Number-Star ladder
  1272. Number.prototype.toDecimal
  1273. Numbers and its Reversal Having Same Prime Factors.
  1274. Numbers in different systems
  1275. Numbers in strings
  1276. Numbers that are a power of their sum of digits
  1277. Numbers Which Sum of Powers of Its Digits Is The Same Number
  1278. Numbers' Plus Pattern
  1279. Numerical Palindrome #2
  1280. Numerical Palindrome #3
  1281. Numerical Palindrome #3.5
  1282. Numerical Palindrome #4
  1283. Numerology
  1284. NxN Connect X
  1285. Obfuscation confusion - Bug Fixing #10
  1286. Object to Array
  1287. object to xml - xml #2
  1288. Objectify all the strings
  1289. Odd Not Prime
  1290. Odd-heavy Array
  1291. Odds-Index
  1292. Offload your work!
  1293. Offspring Traits
  1294. Oh come on! Hello world! once again?
  1295. Oh dear God! Is it bugged?
  1296. Oktober Fest: Bjorg's Got A Drinking Problem
  1297. Old Greg's Binary Fingers
  1298. Once
  1299. One down
  1300. One graph or multiple ones ?
  1301. One Line : Bit Calculator
  1302. One line kata: Sum Multiples of 3 and 5
  1303. One Line Task: 'for' fun
  1304. One Line Task: Diamond Creator Pro
  1305. One Line Task: Making Pizza
  1306. One line task: Multiples of 3 and 5
  1307. One Line Task: Paint The Walls Of Office
  1308. One line task: Square a number Without *, + or Math.pow()
  1309. One line task: Square Every Digit
  1310. One Line Task: String Isomorphism
  1311. One Line Task: The Special Downward Step
  1312. One Line Wonder: Sum All Even Fibonacci Numbers
  1313. One Line: Even Check
  1314. One Variable Second Degree Equation Solver
  1315. Ones' Complement
  1316. Onion array
  1317. Ookkk, Ok, O? Ook, Ok, Ooo!
  1318. Operation - Steal the Election!
  1319. Optimum coding school location
  1320. Oracle: Coin Method
  1321. Ordinal Numbers
  1322. Ore Numbers
  1323. Organise duplicate numbers in list
  1324. ORing arrays
  1325. Orthogonal Vectors
  1326. Pack the box.
  1327. PaginationHelper
  1328. Palindrome for your Dome
  1329. Palindrome integer composition
  1330. Palindromes with a slight twist: vowels & consonants assessed separately
  1331. Palindromic Mnemonics
  1332. Paragraph Setting: Align Left
  1333. Parallel resistors
  1334. Parity bit - Error detecting code
  1335. Parse a linked list from a string
  1336. Parse all my XML please - Angular #1
  1337. Parse HTML/CSS Colors
  1338. Parse this function! - Puzzles #7
  1339. Parsing musical notes into MIDI
  1340. Partial Word Searching
  1341. Partially equal objects
  1342. Partition On
  1343. Path Finder #2: shortest path
  1344. Path Finder #3: the Alpinist
  1345. Path Finder #4: where are you?
  1346. Path Finder #5: there's someone here
  1347. Paths in the Grid
  1348. Paul Cipher & Kevin Arnold
  1349. PC upgrade specs using HOC in ReactJS
  1350. Peak array index
  1351. Peel the Pairs
  1352. Pentabonacci
  1353. Percentage of amino acids
  1354. Perfect Square.
  1355. Permutation position
  1356. Permutation Average
  1357. Permutation by number
  1358. Permutational Primes
  1359. Permutations - Generators #4
  1360. Permutations Of An Array And Associated Values
  1361. Permute a Palindrome
  1362. Personalising Spammy Marketing Emails
  1363. Personalized brand list
  1364. Physics - Mechanics - Atwood Machines in Series
  1365. Piano Kata, Part 1
  1366. Piano Kata, Part 2
  1367. pick a set of first elements
  1368. Pig Sursurunga
  1369. Pillow on the Fridge
  1370. Ping-Pong service problem
  1371. Pinocchio's polygraph.
  1372. Pitches and Notes
  1373. Pizza Payments
  1374. Plants and Zombies
  1375. Play FlappyBird : Advance Bravely
  1376. Play PacMan : Devour all
  1377. Play PingPong : Precise control
  1378. Play Tetris : Shape anastomosis
  1379. Player Contact Manager
  1380. Player Methods - Dungeon crawler #2
  1381. Playing with Sets : Complement
  1382. Playing with Sets : Equal or Not ?
  1383. Playing with Sets : Intersection
  1384. Playing with Sets : Sup/Sub
  1385. Playing with types
  1386. Plenty of Fish in the Pond
  1387. Plus - minus - plus - plus - ... - Count
  1388. Plus - minus - plus - plus - ... - Sum
  1389. Podcast Speed Listening Calculator
  1390. Pokemon Go
  1391. Pokemon Go - Extended Edition
  1392. PokerHelper lvl. 1
  1393. Pole Vault Starting Marks
  1394. Polish alphabet
  1395. Polygon Orientation
  1396. Poor man's spreadsheet API
  1397. Portion of Array
  1398. Possibilities of throwing a coin n times
  1399. Possible Triangles Formed with Available Iron Rods
  1400. Potenciation
  1401. Potion Class 101
  1402. Power
  1403. Power .bind()
  1404. Power 2
  1405. Power Laws
  1406. Powers of 3
  1407. Powers of i
  1408. Practical Interview Prep: Binary Search Tree .push()
  1409. Pre-FizzBuzz Workout #1
  1410. Prefix Permutation
  1411. Presentation order
  1412. Preserve the order !
  1413. Pretty date
  1414. Price is right
  1415. Price of Mangoes
  1416. Prime reduction
  1417. Prime reversion
  1418. Prime Word
  1419. Primes in numbers
  1420. Primitive Pythagorean Triples
  1421. Primorial Of a Number
  1422. Print a Rectangle Using Asterisks
  1423. Print count and numbers
  1424. Print number with character
  1425. PRNG: Linear Congruential Generator
  1426. Process Waterfowl Survey Data Results
  1427. Product ID from URL
  1428. Product of Adjacent Grid Numbers
  1429. Product of consecutive Fib numbers
  1430. Product Of Maximums Of Array (Array Series #2)
  1431. Product of the main diagonal of a square matrix.
  1432. Product-Sum Numbers
  1433. Program a Calculator #1 - Points in 3D Space
  1434. Program a Calculator #2 - 3D Vectors
  1435. Progressive Spiral Number Branch
  1436. Progressive Spiral Number Distance
  1437. Progressive Spiral Number Position
  1438. Promises Made and Broken: The Misadventures of Bob the Highly Paid Consultant
  1439. Protein Synthesis: From DNA to Polypeptide
  1440. Puzzle Fighter
  1441. Pythagorean Triplets
  1442. PythonSlice
  1443. Quadratic Enumerator
  1444. Quantum Bogosort
  1445. Quartile methods
  1446. Queue Battle
  1447. Queue time counter
  1448. Quick (n choose k) calculator
  1449. Quicksum
  1450. Quidditch Scoreboard
  1451. Quipu Calculator
  1452. Random case
  1453. Randomize Objects
  1454. Range function
  1455. Range of Integers in an Unsorted String
  1456. Ranking Appointments
  1457. Ranking System
  1458. Rap-Name Generator
  1459. Ratio of Bouncy Numbers
  1460. Reach Me and Sum my Digits
  1461. React Fun #1: Component types and nesting
  1462. React with JSX
  1463. Read the time
  1464. Readability is King
  1465. Readable developer-friendly large numbers
  1466. Really Complex Sum
  1467. Recurrence by Recursion
  1468. Recursion 101
  1469. Recursion #1 - Factorial
  1470. Recursion #2 - Fibonacci
  1471. Recursion: An introduction
  1472. Recursive Averages
  1473. Recursive Floor Sequence
  1474. Recursive Ninja
  1475. Recursive Ninja: Warlords edition
  1476. Reducing Problems - Bug Fixing #8
  1477. Refactored Greeting
  1478. Regular Expression for Binary Numbers Divisible by n
  1479. Reimplement Multiplication Part 1
  1480. Relatively Prime Numbers
  1481. Remember
  1482. Remove a Specific Element of an Array
  1483. Remove All The Marked Elements of a List
  1484. Remove duplication
  1485. Remove First and Last Character Part Two
  1486. Remove Zeros
  1487. ReOrdering
  1488. Replace Noun Phrases with Pronouns
  1489. Represent array of numbers as ranges
  1490. Retrieve Ether Balance
  1491. Return a sorted list of objects
  1492. Return Specifics from an Object.
  1493. Return String of First Characters
  1494. Return the first M multiples of N
  1495. Return TIMESTAMP from date
  1496. Reverse a Number
  1497. Reverse DNS delegation (RFC4183)
  1498. Reverse every other word in the string
  1499. Reversed Message
  1500. reverseIt
  1501. Reverser
  1502. Reversi row rudiments
  1503. Rithm Series: Frame a Phrase Simple
  1504. Roasting Chicken
  1505. Robbing Rövarspråket
  1506. RoboScript #5 - The Final Obstacle (Implement RSU)
  1507. Robotic Tattoo Removal
  1508. Rock Paper Scissors Oracle
  1509. Roman numerals converter and validator
  1510. Romanize Russian Road Signs
  1511. ROT13 variant cipher
  1512. Rotate Array (JS)
  1513. Rotate Corners
  1514. Rotate matrix counter - clockwise N - times!
  1515. Rotated string
  1516. Rotation Cipher Cracker
  1517. Round by 0.5 steps
  1518. Round to nearest 0 or 5
  1519. Route Calculator
  1520. Routes in a square grid
  1521. Running out of space
  1522. RuplesJS #1: N Times Do
  1523. RuplesJS #2: String Delete
  1524. RuplesJS #3: String EachChar
  1525. RuplesJS #4: String Formatting
  1526. RuplesJS #5: Range
  1527. Russian plurals
  1528. Russian postal code checker
  1529. Saint Petersburg Paradox Model
  1530. Same Birthday Probability
  1531. Santa wish list form in ReactJS
  1532. SantaClausable Interface
  1533. Satisfying numbers
  1534. Save Private Brain
  1535. Scaling Squared Strings
  1536. Scheduling (Round-Robin)
  1537. Scheduling (Shortest Job First or SJF)
  1538. Schrödinger's Boolean
  1539. Scooby Doo Puzzle
  1540. Scrambled Numbers Sorting
  1541. Scraping: Codewars Top 500 Users
  1542. Screen Locking Patterns
  1543. Scrolling Text
  1544. Search and sort names
  1545. search in multidimensional array
  1546. Seating arrangement at a Polyglot Summit
  1547. Secret Agent 101: The secret password
  1548. Secret knock
  1549. Secret Message
  1550. Secret Reverse Language Converter
  1551. See You Next Happy Year
  1552. Seeing Shows at the Edinburgh Fringe!
  1553. Selective Array Reversing
  1554. Selective fear of numbers
  1555. self_converge
  1556. Semi-Optional
  1557. Sentence Calculator
  1558. Sentences with Functions
  1559. Separate The Wheat From The Chaff
  1560. Separating Strings
  1561. Sequence convergence
  1562. Sequence to 1
  1563. Series Forensics
  1564. Set - the card game
  1565. Seventh JSON of a seventh JSON
  1566. Sexy Primes <3
  1567. Shakespearean Tug of War
  1568. Share prices
  1569. Sharpen up
  1570. Shop Inventory Manager
  1571. Shorten Me: Array Declaration III (Fibonacci Last Digit)
  1572. Shorten Me: Array Declaration IV (1-30)
  1573. Shorten Me: Array Declaration IX (Variable Types)
  1574. Shorten Me: Array Declaration V (Weekday & Weekend)
  1575. Shorten Me: Array Declaration VI (Months)
  1576. Shorten Me: Array Declaration VII (Alphabets)
  1577. Shorten Me: Array Declaration VIII (Musical Scales)
  1578. Shorten Me: Array Declaration X (O-I-II)
  1579. Shorten Me: Array Declaration XI (Triangle)
  1580. Shorten Me: Array Declaration XII (Constants)
  1581. Shorten Me: Mad Mathematician's Algorithm VI (Power)
  1582. shorter concat [reverse longer]
  1583. Shortest Code : Are they symmetrical?
  1584. Shortest code : Balance Attraction
  1585. Shortest Code : Eat watermelon
  1586. Shortest Code : Find the murderer
  1587. Shortest Code : Guess the Hat
  1588. Shortest Code : Jumping Dutch act
  1589. Shortest Code : Planting Trees
  1590. Shortest Code : Reading a Book
  1591. Shortest Code : Regular expression compression
  1592. Shortest Code : Remove screws I
  1593. Shortest Code : Special factor
  1594. Shortest code : Tidy up the room
  1595. Shortest Code : Waiting for a Bus
  1596. Shortest code: Bug in Apple
  1597. Shortest Code: Collatz Array(Split or merge)
  1598. Shortest code: Father and Son
  1599. Shortest code: Give me the equation
  1600. Shortest code: Max Value
  1601. Shortest Code: Symmetric Sort
  1602. Shortest Code: Trypophobia
  1603. Shortest code: Virus in Apple
  1604. Shortest Knight Path
  1605. Shortest steps to a number
  1606. Shrink the maze!
  1607. SillyCASE
  1608. Simple division
  1609. Simple arithmetic progression
  1610. Simple array product
  1611. Simple Blackjack
  1612. Simple Change Machine
  1613. Simple Comparison?
  1614. Simple consecutive pairs
  1615. Simple CSS selector comparison
  1616. Simple digit code breaker
  1617. Simple directions reversal
  1618. Simple equation reversal
  1619. Simple Events
  1620. Simple eviternity numbers
  1621. Simple fibonacci strings
  1622. Simple fraction to mixed number converter
  1623. Simple frequency sort
  1624. Simple Fun #364: Not Too Random
  1625. Simple Fun #365: Remove Number Game I
  1626. Simple Fun #377: The Visible Posters II
  1627. Simple Interest and Compound Interest
  1628. Simple letter removal
  1629. Simple Maths Test
  1630. Simple max digit sum
  1631. Simple Memory Manager
  1632. Simple missing sum
  1633. Simple nearest prime
  1634. Simple non-decreasing array
  1635. Simple number sequence
  1636. Simple palindrome game
  1637. Simple parenthesis removal
  1638. Simple Physics Problem
  1639. Simple prime streaming
  1640. Simple repeated words
  1641. Simple reversal game
  1642. Simple reversed parenthesis
  1643. Simple rotated palindromes
  1644. Simple Ruby code formatter
  1645. Simple safecracking
  1646. Simple Simple Simple String Expansion
  1647. Simple string characters
  1648. Simple string division
  1649. Simple string division II
  1650. Simple string expansion
  1651. Simple string indices
  1652. Simple string matching
  1653. Simple string reversal
  1654. Simple string reversal II
  1655. Simple Substitution Cipher Helper
  1656. Simple sum of pairs
  1657. Simple template
  1658. Simple Time Bomb
  1659. Simple time difference
  1660. Simple Web Framework #1: Create a basic router
  1661. simpleLog
  1662. Simplify the number!
  1663. Simplifying multilinear polynomials
  1664. Simulating a Multiserver Queue
  1665. Simultaneous Equations - Three Variables
  1666. Single character palindromes
  1667. Single character palindromes II
  1668. Single-Use Tickets: Don't Let Anyone Sneak In!
  1669. Singleton Pattern
  1670. Sir , showMe yourID
  1671. Slamming Lockers
  1672. sliceBits(int, from, count)
  1673. Sliding Puzzle Solver
  1674. Smallest possible sum
  1675. Smart Sum
  1676. Smart Toaster
  1677. Smith number
  1678. SMS Lottery Bet Validator
  1679. SMS Shortener
  1680. Soccer Fixtures Results Table
  1681. Socialist distribution
  1682. Solomon's Quest for the Temporal Crystal
  1683. Solve For X
  1684. solve from sums
  1685. Solve Rubik 's Cube by repetition
  1686. Solving Quadratics
  1687. Some Circles
  1688. Something 's fishy...
  1689. Sort and Transform
  1690. sort array by last character
  1691. Sort it out!
  1692. Sort rectangles and circles by area
  1693. Sort the climbing grades
  1694. Sort the Gift Code
  1695. Sort the Vowels!
  1696. Sorted list
  1697. Sorting Arrays by the Amount of Perfect Squares that Each Element May Generate
  1698. Sorting the Rabbit Hole
  1699. Sorting Time
  1700. Space Invaders Underdog
  1701. Spanish Conjugator
  1702. Spanish Pirates off the Treasure Coast
  1703. Sparse Ruler
  1704. Sparse array split function
  1705. Special Number (Special Numbers Series #5)
  1706. Special Multiples
  1707. Special Scores For Words
  1708. Speech to Text - String Manipulation
  1709. SpeedCode #1 - Getters and Setters in Object Literals
  1710. SpeedCode #2 - Array Madness
  1711. SpeedCode #3 × Fun with ES6 Classes #5 - Dogs and Classes
  1712. SpeedCode #4 × Factory Functions #3 - Artefacts
  1713. Spider man and his enemy
  1714. Spidey Swings Across Town
  1715. Spinning Rings
  1716. Split an array
  1717. Split and then add both sides of an array together.
  1718. Split In Parts
  1719. Split string for Text-to-Speech API
  1720. Split The Bill
  1721. Sports league table - help your local team!
  1722. Spraying trees
  1723. Spy Function
  1724. Square sums (simple)
  1725. Squarefree Part of a Number
  1726. Squares sequence
  1727. Stack Safe Recursion
  1728. Stargate SG-1: Cute and Fuzzy (Improved version)
  1729. Statistics - Fundamentals
  1730. Statistics for an Athletic Association
  1731. Statistics in Kata 2: AND case - Ball bags
  1732. Steer the Ship
  1733. Steps in k-primes
  1734. Steven's Password Decryption
  1735. Stock Position Size Calculator
  1736. Stone bridge primes
  1737. Stop it, HTML!
  1738. Strange roman numbers
  1739. String array duplicates
  1740. String like [Char]
  1741. String basics
  1742. String Box
  1743. String Breakers
  1744. String character frequency
  1745. String chunks
  1746. String Compression Challenge
  1747. String counting
  1748. String doubles
  1749. String Evaluation
  1750. String formatter
  1751. String Integer Greater-than
  1752. String matchup
  1753. String Merge!
  1754. String reduction
  1755. String Reordering
  1756. String Scramble
  1757. String subpattern recognition I
  1758. String subpattern recognition II
  1759. String subpattern recognition III
  1760. Strings, strings, strings (Easy)
  1761. Strings, strings, strings (Hard)
  1762. Stutter function
  1763. Sub-array division
  1764. Subnet Calculating
  1765. Sum #2
  1766. Sum decomposition
  1767. Sum of (Two) Squares
  1768. Sum of a Sequence [Hard-Core Version]
  1769. Sum of all arguments
  1770. Sum of array singles
  1771. Sum of differences between products and LCMs
  1772. Sum of differences in array
  1773. Sum of integer combinations
  1774. Sum of integers in string
  1775. Sum of prime-indexed elements
  1776. Sum Only Numbers
  1777. Sum The Strings: ARRAY EDITION
  1778. Sum up the random string
  1779. sum2total
  1780. Summarize ranges
  1781. Summy
  1782. Super Class Extensions
  1783. Super Smaaassh Brotheerrrs!
  1784. Superphore Master
  1785. Surface Area and Volume of a Trapezoidal Prism
  1786. Sushi-go-round (Beginner's)
  1787. Swap the head and the tail
  1788. Swap two elements
  1789. Swap two numbers
  1790. Swarm bots - swarm intelligence #1
  1791. Swedish Tipping
  1792. Sweet Dreams are Made of Cheese
  1793. Switch/Case - Bug Fixing #6
  1794. Symbolic differentiation of prefix expressions
  1795. Symbols counted
  1796. Synchonizing records
  1797. T.T.T. #7: Profit or loss
  1798. T.T.T. #8: Reverse all
  1799. T.T.T. #9: Peaks and valleys
  1800. T.T.T.#2: Equal to 24
  1801. T.T.T.#3: Three lifts
  1802. T.T.T.#4: Key of door
  1803. T.T.T.#5: Only you
  1804. T.T.T.#6: nth user
  1805. T.T.T.10: The largest square
  1806. T.T.T.11: Three increasing numbers
  1807. T.T.T.12: Split integer
  1808. T.T.T.13: A game named "Five,Ten,Fifteen,Twenty"
  1809. T.T.T.14: Find the largest "X"
  1810. T.T.T.15: Sort the alarm clock
  1811. T.T.T.16: Warning of Array.map()
  1812. T.T.T.23: Silly birds
  1813. T.T.T.24: Chinese surname (《百家姓》)
  1814. T.T.T.33: Grandfather clock
  1815. T.T.T.38: The sum of each digits
  1816. T.T.T.40: m to n % 9
  1817. T.T.T.41: The maximum profit
  1818. 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）
  1819. T.T.T.58: Simple face recognition system
  1820. T.T.T.59: The language from the distant planet
  1821. T.T.T.60: Break all the rules
  1822. T.T.T.61: Alien's magic
  1823. Tabs to spaces
  1824. Tail Call Optimization
  1825. Take an Arrow to the knee, Functionally
  1826. Take It or Leave It Interview Strategy
  1827. Take the Derivative
  1828. Takeshi's Castle Spy: Knock Knock
  1829. Talisman Board Game Combat System Checker
  1830. Tank coding #1 : simple AIM systems
  1831. Tap Into Mr. Mxyzinjin's Brain
  1832. Tap Into Mr. Mxyzinjin's Matrix
  1833. Tap Into Mr. Mxyzinjin's Safe
  1834. Tap into Mr. Mxyzinjin's Stream
  1835. Tap Into Mr. Mxyzinjin's Toy Safe
  1836. Tap into Reivhax's robot
  1837. Temp Tracker: Max, Min, Mean and Mode
  1838. Template Strings
  1839. Test for semiprime (Mathematics)
  1840. Test Your Knowledge Of Function Scope
  1841. Test's results
  1842. Testing the Porges hypothesis
  1843. Texas Hold'em Hands
  1844. Text editor feature!
  1845. The 'if' function
  1846. The (nearly) Perfect Mirror
  1847. The 196-algorithm and Lychrel numbers
  1848. The answer to life the universe and everything.
  1849. The Answer to the Ultimate Question of Life, The Universe, and Everything
  1850. The Arpeggiator
  1851. The average length
  1852. The Baby Years III - First Tooth
  1853. The boolean order
  1854. The common directory path
  1855. The Coupon Code
  1856. The Cube Structure
  1857. The Deca Tree
  1858. The Desperate Rocket Scientist
  1859. The Enigma Machine - Part 1: The Plugboard
  1860. The fusc function -- Part 1
  1861. The fusc function -- Part 2
  1862. The good old olden early years
  1863. the hidden thief
  1864. The Ice Cream Vendors Dilema
  1865. The Ladies of ENIAC
  1866. The largest "mirror"
  1867. The learning game - Machine Learning #1
  1868. The longest bracket substring in the string
  1869. The map and the keys
  1870. The maximum sum value of ranges -- Ultimate version
  1871. The money in the bank
  1872. The most asked question on CodeWars
  1873. The Most Repeated Letter.
  1874. The Most Sacred of Days
  1875. The observed PIN
  1876. The Office II - Boredom Score
  1877. The old switcheroo
  1878. The old switcheroo 2
  1879. The Overlap Time
  1880. The Owls Are Not What They Seem
  1881. The Power of Exponents
  1882. The Prediction
  1883. The Queen Of Hearts Challenge
  1884. The queen on the chessboard
  1885. The rarest pepe
  1886. The Rhinestone Cowboy ~ Count the dollars in his boots!
  1887. The sortReloaded() method
  1888. The Sum and The Rest of Certain Pairs of Numbers have to be Perfect Squares (more Challenging)
  1889. The Supermarket Queue
  1890. The ugly truth about reduce
  1891. The ugly truth about reduce (ii)
  1892. The ugly truth about reduce (iii)
  1893. The Walker
  1894. The wheat/rice and chessboard problem
  1895. There are two kinds of people
  1896. 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?
  1897. Thinkful - Logic Drills: Red and bumpy
  1898. Thinkful - Number Drills: Blue and red marbles
  1899. Thinkful - Object Drills: Vectors
  1900. Thinking & Testing #38: What's the "?"
  1901. Thinking & Testing : Archery contest
  1902. Thinking & Testing : A happy day will come
  1903. Thinking & Testing : Digital swimming pool
  1904. Thinking & Testing : Falsetto Rap Concert
  1905. Thinking & Testing : From nothingness To nothingness
  1906. Thinking & Testing : Hail and Waterfall
  1907. Thinking & Testing : How many "word"?
  1908. Thinking & Testing : How many blocks?
  1909. Thinking & Testing : I hate big and small
  1910. Thinking & Testing : Incomplete string
  1911. Thinking & Testing : Love Forever
  1912. Thinking & Testing : Math of Middle school
  1913. Thinking & Testing : Math of Primary School
  1914. Thinking & Testing : Nebula or Vortex
  1915. Thinking & Testing : Not perfect? Throw away!
  1916. Thinking & Testing : Operator hidden in a string
  1917. Thinking & Testing : Report about something
  1918. Thinking & Testing : Retention and discard
  1919. Thinking & Testing : Retention and discard II
  1920. Thinking & Testing : Safe position
  1921. Thinking & Testing : Something capitalized
  1922. Thinking & Testing : Spatiotemporal index
  1923. Thinking & Testing : Sport Star
  1924. Thinking & Testing : Substring Magic
  1925. Thinking & Testing : Sum of 15(Hetu Luosliu)
  1926. Thinking & Testing : The repair of parchment
  1927. Thinking & Testing : True or False
  1928. Thinking & Testing : Uniq or not Uniq
  1929. Thinking & Testing : Who are you?
  1930. Thinking & Testing : Wind whispers
  1931. Thinking & Testing: A and B?
  1932. This isn't what you think! The Misadventures of Bob the Highly Paid Consultant #2
  1933. THIS n' THAT
  1934. Three added Characters
  1935. Three Dots--Play game Series #8
  1936. Throw from list - Error Handling #3
  1937. Thue-Morse Sequence
  1938. Tic-Tac-Toe Checker
  1939. Tic-Tac-Toe-like table Generator
  1940. Ticker
  1941. Tidy Number (Special Numbers Series #9)
  1942. Time Conversion: 12s and 24s
  1943. Time Converter: hours, minutes, seconds and milliseconds
  1944. Time Degrees
  1945. Time Simulation
  1946. Timers
  1947. To BrainFuck Transpiler
  1948. toHonestlyFixed()
  1949. ToLeetSpeak
  1950. Tom's Allergies
  1951. Tombola - validation
  1952. Total Resistance in a Parallel Circuit
  1953. Touching Rectangles
  1954. Tower Defense: Risk Analysis
  1955. Track the Ball
  1956. Tracking Hits for Different Sum Values for Different Kinds of Dice
  1957. Tracking Sums in a Process
  1958. Train to remove duplicates from an array with filter()
  1959. Training JS #1: create your first JS function and print "Hello World!"
  1960. Training JS #10: loop statement --for
  1961. Training JS #11: loop statement --break,continue
  1962. Training JS #12: loop statement --for..in and for..of
  1963. Training JS #13: Number object and its properties
  1964. Training JS #14: Methods of Number object--toString() and toLocaleString()
  1965. Training JS #15: Methods of Number object--toFixed(), toExponential() and toPrecision()
  1966. Training JS #16: Methods of String object--slice(), substring() and substr()
  1967. Training JS #17: Methods of String object--indexOf(), lastIndexOf() and search()
  1968. Training JS #18: Methods of String object--concat() split() and its good friend join()
  1969. Training JS #19: Methods of String object--toUpperCase() toLowerCase() and replace()
  1970. Training JS #2: Basic data types--Number
  1971. Training JS #20: Methods of String object--charAt() charCodeAt() and fromCharCode()
  1972. Training JS #21: Methods of String object--trim() and the string template
  1973. Training JS #22: Unlock new skills--Arrow function,spread operator and deconstruction
  1974. Training JS #23: methods of arrayObject---push(), pop(), shift() and unshift()
  1975. Training JS #24: methods of arrayObject---splice() and slice()
  1976. Training JS #25: methods of arrayObject---reverse() and sort()
  1977. Training JS #26: methods of arrayObject---map()
  1978. Training JS #27: methods of arrayObject---filter()
  1979. Training JS #28: methods of arrayObject---every() and some()
  1980. Training JS #29: methods of arrayObject---concat() and join()
  1981. Training JS #3: Basic data types--String
  1982. Training JS #30: methods of arrayObject---reduce() and reduceRight()
  1983. Training JS #31: methods of arrayObject---isArray() indexOf() and toString()
  1984. Training JS #32: methods of Math---round() ceil() and floor()
  1985. Training JS #33: methods of Math---max() min() and abs()
  1986. Training JS #35: methods of Math---log() and its family
  1987. Training JS #36: methods of Math---kata author's lover:random()
  1988. Training JS #37: Unlock new weapon---RegExp Object
  1989. Training JS #38: Regular Expression--"^","$", "." and test()
  1990. Training JS #39: Regular Expression--"?", "*", "+" and "{}"
  1991. Training JS #4: Basic data types--Array
  1992. Training JS #40: Regular Expression--"|", "[]" and "()"
  1993. Training JS #41: Regular Expression--""
  1994. Training JS #42: Regular Expression--( ?: ), ( ?= ) and ( ?! )
  1995. Training JS #5: Basic data types--Object
  1996. Training JS #6: Basic data types--Boolean and conditional statements if..else
  1997. Training JS #7: if..else and ternary operator
  1998. Training JS #8: Conditional statement--switch
  1999. Training JS #9: loop statement --while and do..while
  2000. Training Random Testcases #2: Palindrome string
  2001. Tram Capacity
  2002. Transform To Prime
  2003. Transforming Maze Solver
  2004. Translate DNA in 6 frames
  2005. Transpose of a Matrix
  2006. Traverse array elements diagonally
  2007. Treasure Box
  2008. Tree Depth
  2009. Tree Directory
  2010. Triangle Line Task: Fizz Buzz
  2011. Triangle of Multiples (Easy One)
  2012. Triangle type
  2013. Triangular matrices.
  2014. Tribonacci Sequence
  2015. Triple Shiftian Numbers
  2016. Triple trouble
  2017. Troll Mystery Encoding
  2018. Truck driving time(Level I)
  2019. Trucks Driver Time.
  2020. True Addition
  2021. True Min
  2022. Trumpness detector
  2023. Truncate a string!
  2024. Tube strike options calculator
  2025. Turn any word into a beef taco
  2026. TV channels
  2027. Twice Their Age
  2028. Two arrays -- Zero rows and zero columns
  2029. Two cube sums
  2030. Two's complement
  2031. Two's Complement
  2032. Type of sum
  2033. Typoglycemia Generator
  2034. UN-usual Sort
  2035. Unary function chainer
  2036. Understanding closures - the basics
  2037. Unicode Madness: 東方名確認　～ Eastern Title Validator.
  2038. UniDecoder
  2039. Union of Intervals
  2040. Unique digits sequence
  2041. Unique string characters
  2042. Unique Sum
  2043. uniquePush - No Dupes!
  2044. Unit-Test Inception
  2045. Unix command line ls -l extract the file type.
  2046. Unlucky Days
  2047. Unpacking Arguments
  2048. Unsecure login - Hack this code #1
  2049. Unshackle the Beast (uncontrolled components in ReactJS)
  2050. up AND down
  2051. upperCasePlace()
  2052. Upside down numbers
  2053. Upside-Down Numbers - Challenge Edition
  2054. Upside-Down Pyramid Addition...REVERSED!
  2055. Upstream/Downstream
  2056. Upturn Numeral Triangle
  2057. Urban Dictionary
  2058. URI codec (encode/decode)
  2059. UriBuilder
  2060. UVB-76 Message Validator
  2061. Valid Curly Braces (Code Golf)
  2062. Valid GB number plate?
  2063. Valid HK Phone Number
  2064. Vending Machine
  2065. Vertical symmetry on coordinate plane
  2066. Visa application centre
  2067. Visible Dots On a Die
  2068. Volume of a Cuboid
  2069. Vowel Alternations
  2070. Vowel one
  2071. Vowel Shifting
  2072. Vowel-consonant lexicon
  2073. Walk-up Stairs
  2074. Walter's miraculous FizzBuzz factory
  2075. Warm Up for Speed.
  2076. Warrior's adventure
  2077. Waving the Stream
  2078. We are Family
  2079. We are the Robots d[(0)(0)]b
  2080. We need these data immediately!
  2081. Weight of its Contents
  2082. Weighted Grading System
  2083. Weird Factory
  2084. Welcome to Economics! #1 Consumer Price Index
  2085. Welcome to Economics! #2 Economic Surplus
  2086. What Happened To My Object?
  2087. What happened to the vowels?
  2088. What The Biggest Search Keys?
  2089. What's a Perfect Power anyway?
  2090. What's in a name?
  2091. What's the pattern?
  2092. What’s the degree?
  2093. When's my birthday ?
  2094. When's the next train to Brighton?
  2095. Where did my Ether go?
  2096. Where do they meet?
  2097. Which are in?
  2098. Which Gas Station should I pick?
  2099. Whitespace Interpreter
  2100. Who ate the cookie?
  2101. Who can still win the Formula One World Championship?
  2102. Who is going to pay for the wall?
  2103. Who wins the card game?
  2104. Whole of Names
  2105. Whose bicycle?
  2106. Word Challenges at School
  2107. Word Finder
  2108. Word Segmentation: MaxMatch
  2109. Wordify an integer
  2110. Wordsearch
  2111. WordSquare
  2112. Working With Coloured Numbers
  2113. Working With Coloured Numbers II
  2114. Working with Dictionaries
  2115. World Bits War
  2116. World Rally Championship
  2117. Wrapped Function
  2118. Write a function to sort a given string into alphabetical order
  2119. Write a letter to your friend (给远方的朋友写封信)
  2120. Write out numbers
  2121. X marks the spot!
  2122. X plus Y Card problem
  2123. xml to object - xml #1
  2124. XOR string reduction
  2125. YaCG: #1 Yet another Card Kata !
  2126. YaCG: #2 One Trick, One Taker.
  2127. YaCG: #3 "no elephant were harmed..."
  2128. Yes No Yes No
  2129. You are a Cube!
  2130. You Can't Code Under Pressure #2
  2131. You're not my type
  2132. Your Ride Is Here
  2133. Zebulan's Nightmare
  2134. Zero fill... for the Queen!
  2135. zero-balanced Array
  2136. Zeros and Ones
  2137. Ziggurat Ride of Fortune
  2138. Zonk game

List of Node 12.x Kata

The following failed to upgrade to Node 14.x/18.x automatically.

  1. Bresenham Circle Algorithm
  2. Ludicrous Coloured Triangles

List of Node 10.x kata

The following failed to update automatically by prepending const Test = require('@codewars/test-compat'); to tests.

  1. Brick by Boring Brick - Mathematical expression interpreter
  2. Game of Go
  3. Greedy seller's quotes -- update available
  4. How can I throw an error here? -- update available
  5. Implementing Object.create -- update available
  6. Lempel–Ziv–Welch
  7. longest_palindrome
  8. Mad Mathematician's Calculator (Basic Version)
  9. Mad Mathematician's Calculator (Hardcore Version)
  10. Mean Means
  11. one line task : date converter (not that date, the other one)
  12. Papers, Please
  13. Save the Spice Harvester (Dune Universe)
  14. Simple Fun #242: Caesar Box Cipher Encoding -- update available
  15. Simple Fun #379: Division -- update available
  16. splicing
  17. Stable Weight Arrangement
  18. The Coins of Ter | Round to the Next N
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