Description
Given a string s and an array of strings words, determine whether s is a prefix string of words.
A string s is a prefix string of words if s can be made by concatenating the first k strings in words for some positive k no larger than words.length.
Return true if s is a prefix string of words, or false otherwise.
Examples
Input: s = "iloveleetcode", words = ["i","love","leetcode","apples"]
Output: true
Explanation:
s can be made by concatenating "i", "love", and "leetcode" together.
Input: s = "iloveleetcode", words = ["apples","i","love","leetcode"]
Output: false
Explanation:
It is impossible to make s using a prefix of arr.Solution
var isPrefixString = function(s, words) {
let str = '';
for(let i = 0; i < words.length; i++) {
str = str.concat(words[i]);
if(s === str) {
return true;
}
}
return false;
};Result
Accepted
349/349 cases passed (106 ms)
Your runtime beats 17.91 % of javascript submissions
Your memory usage beats 91.04 % of javascript submissions (39.8 MB)
