LeetCode： Check If Two String Arrays are Equivalent

Question

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

Solution#1

def array_strings_are_equal(word1, word2)
  word1.join == word2.join
end

Solution#2

def array_strings_are_equal(word1, word2)
  i = 0
  j = 0
  first_word = String.new
  second_word = String.new

  while i < word1.length
    first_word = first_word + word1[i]
    i += 1
  end
  first_word

  while j < word2.length
    second_word = second_word + word2[j]
    j += 1
  end
  first_word == second_word
end