/**
* @param {string} haystack
* @param {string} needle
* @return {number}
*/
var strStr = function(haystack, needle) {
if(needle === "") return 0;
let array =haystack.split(needle);
if(array.length === 1) return -1;
return array[0].length
};
/**
* @param {string} haystack
* @param {string} needle
* @return {number}
*/
var strStr = function(haystack, needle) {
if(needle === "") return 0;
let array =haystack.split(needle);
if(array.length === 1) return -1;
return array[0].length
};
