myForEach

标签：function index myForEach len callback thisArg

Array.prototype.myForEach = function (callback, thisArg = undefined) {
    if (typeof callback !== 'function') {
        throw new TypeError(`${callback} is not a function`);
    }
    let index = 0
    const len = this.length
    while (index < len) {
        if (index in this) callback.call(thisArg, this[index], index, this)
        index++
    }
}

　　

标签：function,index,myForEach,len,callback,thisArg
From： https://www.cnblogs.com/zhenjianyu/p/17128778.html