0014-longest-common-prefix.ts

function longestCommonPrefix(strs: string[]): string {
    let res = '';

    for (let i = 0; i < strs[0].length; i++) {
        for (const s of strs) {
            if (i == s.length || s[i] !== strs[0][i]) {
                return res;
            }
        }
        res += strs[0][i];
    }

    return res;
}