2025-04-07 v. 9.2.0: added "2390. Removing Stars From a String"

Author: fartem

README.md

@@ -754,6 +754,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 2295. Replace Elements in an Array                                                  | [Link](https://leetcode.com/problems/replace-elements-in-an-array/)                                                  | [Link](./lib/medium/2295_replace_elements_in_an_array.rb)                                                  | [Link](./test/medium/test_2295_replace_elements_in_an_array.rb)                                                  |
 | 2326. Spiral Matrix IV                                                              | [Link](https://leetcode.com/problems/spiral-matrix-iv/)                                                              | [Link](./lib/medium/2326_spiral_matrix_iv.rb)                                                              | [Link](./test/medium/test_2326_spiral_matrix_iv.rb)                                                              |
 | 2375. Construct Smallest Number From DI String                                      | [Link](https://leetcode.com/problems/construct-smallest-number-from-di-string/)                                      | [Link](./lib/medium/2375_construct_smallest_number_from_di_string.rb)                                      | [Link](./test/medium/test_2375_construct_smallest_number_from_di_string.rb)                                      |
+| 2390. Removing Stars From a String                                                  | [Link](https://leetcode.com/problems/removing-stars-from-a-string/)                                                  | [Link](./lib/medium/2390_removing_stars_from_a_string.rb)                                                  | [Link](./test/medium/test_2390_removing_stars_from_a_string.rb)                                                  |
 | 2425. Bitwise XOR of All Pairings                                                   | [Link](https://leetcode.com/problems/bitwise-xor-of-all-pairings/)                                                   | [Link](./lib/medium/2425_bitwise_xor_of_all_pairings.rb)                                                   | [Link](./test/medium/test_2425_bitwise_xor_of_all_pairings.rb)                                                   |
 | 2429. Minimize XOR                                                                  | [Link](https://leetcode.com/problems/minimize-xor/)                                                                  | [Link](./lib/medium/2429_minimize_xor.rb)                                                                  | [Link](./test/medium/test_2429_minimize_xor.rb)                                                                  |
 | 2657. Find the Prefix Common Array of Two Arrays                                    | [Link](https://leetcode.com/problems/find-the-prefix-common-array-of-two-arrays/)                                    | [Link](./lib/medium/2657_find_the_prefix_common_array_of_two_arrays.rb)                                    | [Link](./test/medium/test_2657_find_the_prefix_common_array_of_two_arrays.rb)                                    |

leetcode-ruby.gemspec

@@ -5,7 +5,7 @@ require 'English'
 ::Gem::Specification.new do |s|
   s.required_ruby_version = '>= 3.0'
   s.name = 'leetcode-ruby'
-  s.version = '9.1.9'
+  s.version = '9.2.0'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'

lib/medium/2390_removing_stars_from_a_string.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/removing-stars-from-a-string/
+# @param {String} s
+# @return {String}
+def remove_stars(s)
+  stack = []
+
+  s.each_char do |char|
+    if char == '*'
+      stack.pop unless stack.empty?
+    else
+      stack.push(char)
+    end
+  end
+
+  stack.join
+end

test/medium/test_2390_removing_stars_from_a_string.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/2390_removing_stars_from_a_string'
+require 'minitest/autorun'
+
+class RemovingStarsFromAStringTest < ::Minitest::Test
+  def test_default_one
+    assert_equal(
+      'lecoe',
+      remove_stars(
+        'leet**cod*e'
+      )
+    )
+  end
+
+  def test_default_two
+    assert_equal(
+      '',
+      remove_stars(
+        'erase*****'
+      )
+    )
+  end
+end