14-longest-common-prefix.js

/**
 * @param {string[]} strs
 * @return {string}
 */
const longestCommonPrefix = function(strs) {
  const A = strs.concat().sort(),
    a1 = A[0] || "",
    a2 = A[A.length - 1] || "",
    L = a1.length,
    i = 0;
  while (i < L && a1.charAt(i) === a2.charAt(i)) i++;
  return a1.substring(0, i);
};