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Merge pull request #652 from fartem/3_Longest_Substring_Without_Repeating_Characters
2024-06-24 v. 5.9.5: added "3. Longest Substring Without Repeating Characters"
2 parents 1a689c3 + 2117e07 commit e98ecdc

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-4
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README.md

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@@ -457,6 +457,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
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### Medium
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| Name | Link to LeetCode | Link to solution |
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|--------------------|--------------------------------------------------------|-------------------------------------------|
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| 2. Add Two Numbers | [Link](https://leetcode.com/problems/add-two-numbers/) | [Link](./lib/medium/2_add_two_numbers.rb) |
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| Name | Link to LeetCode | Link to solution |
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|---------------------------------------------------|---------------------------------------------------------------------------------------|--------------------------------------------------------------------------|
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| 2. Add Two Numbers | [Link](https://leetcode.com/problems/add-two-numbers/) | [Link](./lib/medium/2_add_two_numbers.rb) |
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| 3. Longest Substring Without Repeating Characters | [Link](https://leetcode.com/problems/longest-substring-without-repeating-characters/) | [Link](./lib/medium/3_longest_substring_without_repeating_characters.rb) |

leetcode-ruby.gemspec

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@@ -5,7 +5,7 @@ require 'English'
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::Gem::Specification.new do |s|
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s.required_ruby_version = '>= 3.0'
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s.name = 'leetcode-ruby'
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s.version = '5.9.4'
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s.version = '5.9.5'
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s.license = 'MIT'
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s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
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s.executable = 'leetcode-ruby'
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# frozen_string_literal: true
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# https://leetcode.com/problems/longest-substring-without-repeating-characters/
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# @param {String} s
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# @return {Integer}
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def length_of_longest_substring(s)
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last_index = ::Array.new(256, -1)
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index = 0
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result = 0
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(0...s.length).each do |i|
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c = s[i].ord
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index = [index, last_index[c] + 1].max
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result = [result, i - index + 1].max
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last_index[c] = i
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end
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result
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end
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# frozen_string_literal: true
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require_relative '../test_helper'
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require_relative '../../lib/medium/3_longest_substring_without_repeating_characters'
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require 'minitest/autorun'
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class LongestSubstringWithoutRepeatingCharactersTest < ::Minitest::Test
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def test_default
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assert_equal(3, length_of_longest_substring('abcabcbb'))
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assert_equal(1, length_of_longest_substring('bbbbb'))
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assert_equal(3, length_of_longest_substring('pwwkew'))
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end
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end

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