1662. Check If Two String Arrays are Equivalent (E)

Check If Two String Arrays are Equivalent (E)

题目

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 <= 10^3
• 1 <= word1[i].length, word2[i].length <= 10^3
• 1 <= sum(word1[i].length), sum(word2[i].length) <= 10^3
• word1[i] and word2[i] consist of lowercase letters.

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题意

判断两个字符串数组拼接成的字符串是否相等。

思路

直接拼接比较。

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代码实现

Java

class Solution {
    public boolean arrayStringsAreEqual(String[] word1, String[] word2) {
        StringBuilder sb1 = new StringBuilder(), sb2 = new StringBuilder();
        for (String s : word1) sb1.append(s);
        for (String s : word2) sb2.append(s);
        return sb1.toString().equals(sb2.toString());
    }
}