2024-04-10 v. 5.4.3: added "2278. Percentage of Letter in String"

README.md

@@ -403,3 +403,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 2255. Count Prefixes of a Given String                             | [Link](https://leetcode.com/problems/count-prefixes-of-a-given-string/)                             | [Link](./lib/easy/2255_count_prefixes_of_a_given_string.rb)                             |
 | 2259. Remove Digit From Number to Maximize Result                  | [Link](https://leetcode.com/problems/remove-digit-from-number-to-maximize-result/)                  | [Link](./lib/easy/2259_remove_digit_from_number_to_maximize_result.rb)                  |
 | 2264. Largest 3-Same-Digit Number in String                        | [Link](https://leetcode.com/problems/largest-3-same-digit-number-in-string/)                        | [Link](./lib/easy/2264_largest_3_same_digit_number_in_string.rb)                        |
+| 2278. Percentage of Letter in String                               | [Link](https://leetcode.com/problems/percentage-of-letter-in-string/)                               | [Link](./lib/easy/2278_percentage_of_letter_in_string.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 = '5.4.2'
+  s.version = '5.4.3'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'

lib/easy/2278_percentage_of_letter_in_string.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/percentage-of-letter-in-string/
+# @param {String} s
+# @param {Character} letter
+# @return {Integer}
+def percentage_letter(s, letter)
+  (s.count(letter).to_f / s.length * 100).to_i
+end

test/easy/test_2278_percentage_of_letter_in_string.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/2278_percentage_of_letter_in_string'
+require 'minitest/autorun'
+
+class PercentageOfLetterInStringTest < ::Minitest::Test
+  def test_default
+    assert_equal(33, percentage_letter('foobar', 'o'))
+    assert_equal(0, percentage_letter('jjjj', 'k'))
+  end
+end