2024-12-06 v. 7.2.5: added "535. Encode and Decode TinyURL"

Author: fartem

README.md

@@ -590,3 +590,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 516. Longest Palindromic Subsequence                            | [Link](https://leetcode.com/problems/longest-palindromic-subsequence/)                            | [Link](./lib/medium/516_longest_palindromic_subsequence.rb)                            | [Link](./test/medium/test_516_longest_palindromic_subsequence.rb)                            |
 | 523. Continuous Subarray Sum                                    | [Link](https://leetcode.com/problems/continuous-subarray-sum/)                                    | [Link](./lib/medium/523_continuous_subarray_sum.rb)                                    | [Link](./test/medium/test_523_continuous_subarray_sum.rb)                                    |
 | 524. Longest Word in Dictionary through Deleting                | [Link](https://leetcode.com/problems/longest-word-in-dictionary-through-deleting/)                | [Link](./lib/medium/524_longest_word_in_dictionary_through_deleting.rb)                | [Link](./test/medium/test_524_longest_word_in_dictionary_through_deleting.rb)                |
+| 535. Encode and Decode TinyURL                                  | [Link](https://leetcode.com/problems/encode-and-decode-tinyurl/)                                  | [Link](./lib/medium/535_encode_and_decode_tinyurl.rb)                                  | [Link](./test/medium/test_535_encode_and_decode_tinyurl.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 = '7.2.4'
+  s.version = '7.2.5'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'

lib/medium/535_encode_and_decode_tinyurl.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+$urls = {}
+
+# https://leetcode.com/problems/encode-and-decode-tinyurl/
+# @param {String} long_url
+# @return {String}
+def encode(long_url)
+  short_url = generate_short_url(long_url)
+  short_url = generate_short_url(long_url) while $urls.include?(short_url)
+
+  $urls[short_url] = long_url
+
+  short_url
+end
+
+# @param {String} long_url
+# @return {String}
+def generate_short_url(_long_url)
+  symbols = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
+
+  short_url = []
+  (0...6).each { |_| short_url << symbols[rand(symbols.size)] }
+
+  short_url.join
+end
+
+# @param {String} short_url
+# @return {String}
+def decode(short_url) = $urls[short_url]

test/medium/test_535_encode_and_decode_tinyurl.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/535_encode_and_decode_tinyurl'
+require 'minitest/autorun'
+
+class EncodeAndDecodeTinyURLTest < ::Minitest::Test
+  def test_default_one
+    assert_equal(
+      'https://leetcode.com/problems/design-tinyurl',
+      decode(
+        encode(
+          'https://leetcode.com/problems/design-tinyurl'
+        )
+      )
+    )
+  end
+end