1662-check-if-two-string-arrays-are-equivalent.rb

# frozen_string_literal: true

# 1662. Check If Two String Arrays are Equivalent
# Easy
# https://leetcode.com/problems/check-if-two-string-arrays-are-equivalent

=begin
Given two string arrays word1 and word2, return true if the two arrays represent the same string, and false otherwise.
A string is represented by an array if the array elements concatenated in order forms the string.

Example 1:
Input: word1 = ["ab", "c"], word2 = ["a", "bc"]
Output: true
Explanation:
word1 represents string "ab" + "c" -> "abc"
word2 represents string "a" + "bc" -> "abc"
The strings are the same, so return true.

Example 2:
Input: word1 = ["a", "cb"], word2 = ["ab", "c"]
Output: false

Example 3:
Input: word1  = ["abc", "d", "defg"], word2 = ["abcddefg"]
Output: true

Constraints:
1 <= word1.length, word2.length <= 103
1 <= word1[i].length, word2[i].length <= 103
1 <= sum(word1[i].length), sum(word2[i].length) <= 103
word1[i] and word2[i] consist of lowercase letters.
=end

# @param {String[]} word1
# @param {String[]} word2
# @return {Boolean}
def array_strings_are_equal(word1, word2)
  word1.join == word2.join
end

# **************** #
#       TEST       #
# **************** #

require "test/unit"
class Test_array_strings_are_equal < Test::Unit::TestCase
  def test_
    assert_equal true, array_strings_are_equal(["ab", "c"], ["a", "bc"])
    assert_equal false, array_strings_are_equal(["a", "cb"], ["ab", "c"])
    assert_equal true, array_strings_are_equal(["abc", "d", "defg"], ["abcddefg"])
  end
end