2024-01-17 v. 3.9.8: added "1961. Check If String Is a Prefix of Array"

Author: fartem

README.md

@@ -344,3 +344,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 1941. Check if All Characters Have Equal Number of Occurrences     | [Link](https://leetcode.com/problems/check-if-all-characters-have-equal-number-of-occurrences/description/) | [Link](./lib/easy/1941_check_if_all_characters_have_equal_number_of_occurrences.rb)     |
 | 1952. Three Divisors                                               | [Link](https://leetcode.com/problems/three-divisors/description/)                                           | [Link](./lib/easy/1952_three_divisors.rb)                                               |
 | 1957. Delete Characters to Make Fancy String                       | [Link](https://leetcode.com/problems/delete-characters-to-make-fancy-string/description/)                   | [Link](./lib/easy/1957_delete_characters_to_make_fancy_string.rb)                       |
+| 1961. Check If String Is a Prefix of Array                         | [Link](https://leetcode.com/problems/check-if-string-is-a-prefix-of-array/description/)                     | [Link](./lib/easy/1961_check_if_string_is_a_prefix_of_array.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 = '3.9.7'
+  s.version = '3.9.8'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'

lib/easy/1961_check_if_string_is_a_prefix_of_array.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/check-if-string-is-a-prefix-of-array/description/
+# @param {String} s
+# @param {String[]} words
+# @return {Boolean}
+def is_prefix_string(s, words)
+  p = 0
+  i = 0
+  while i < words.length && p < s.length
+    word = words[i]
+    j = p
+    k = 0
+    while j < s.length && k < word.length
+      return false unless s[j] == word[k]
+
+      j += 1
+      k += 1
+    end
+
+    p += word.length
+    i += 1
+  end
+
+  p == s.length
+end

test/easy/test_1961_check_if_string_is_a_prefix_of_array.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/1961_check_if_string_is_a_prefix_of_array'
+require 'minitest/autorun'
+
+class CheckIfStringIsAPrefixOfArrayTest < ::Minitest::Test
+  def test_default
+    assert(is_prefix_string('iloveleetcode', %w[i love leetcode apples]))
+    assert(!is_prefix_string('iloveleetcode', %w[apples i love leetcode]))
+  end
+end