join实现
Array.prototype.myJoin = function (x) {
let arr = Array.prototype.slice.call(this); // arr = this[0];
let newString = "";
for (let i of arr) {
newString += i + x;
}
return newString;
}
console.log([1, 45, "zx"].myJoin("?"));
Array.prototype.myJoin = function (x) {
let arr = Array.prototype.slice.call(this); // arr = this[0];
let newString = "";
for (let i of arr) {
newString += i + x;
}
return newString;
}
console.log([1, 45, "zx"].myJoin("?"));
