数组的filter方法
Array.prototype.MyFilter = function (callback) {
const res = [];
for (let i = 0; i < this.length; i++) {
callback(this[i], i, this) && res.push(this[i]);
}
return res;
};
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数组的filter方法Array.prototype.MyFilter = function (callback) {
const res = [];
for (let i = 0; i < this.length; i++) {
callback(this[i], i, this) && res.push(this[i]);
}
return res;
};