1662. Check If Two String Arrays are Equivalent #

Problem #

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.

Problem Summary #

Given two string arrays word1 and word2. If the strings represented by the two arrays are the same, return true; otherwise, return false. The string represented by an array is the string formed by concatenating all elements in the array in order.

Solution Approach #

Simple problem. Concatenate the strings in the 2 arrays in order, then compare whether str1 and str2 are the same.

Code #

package leetcode

func arrayStringsAreEqual(word1 []string, word2 []string) bool {
	str1, str2 := "", ""
	for i := 0; i < len(word1); i++ {
		str1 += word1[i]
	}
	for i := 0; i < len(word2); i++ {
		str2 += word2[i]
	}
	return str1 == str2
}