1662. 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

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.

#### SOLUTION:

class Solution {
fun arrayStringsAreEqual(word1: Array<String>, word2: Array<String>): Boolean {
var sb1: StringBuilder = StringBuilder()
word1.forEach { s -> sb1.append(s) }
var sb2: StringBuilder = StringBuilder()
word2.forEach { s -> sb2.append(s) }
return sb1.toString().equals(sb2.toString())
}
}
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