JS to call Apply bind understanding

Please refer to http://www.cnblogs.com/xljzlw/p/3775162.html
Call apply
var MTT = {    name: "MTT",    sayhello:function (age) {         console.log ("Hello, I Am", this.name + "+ Age" years Old ");}     ; var  xjs = {    name: "XJS",
};mtt.sayhello (24);   Hello, I am zlw years old

The Apply parameter needs to be in the form of an array, and the call parameter needs to be separated by commas 24,25

MTT Sayhello.call (XJS, 24);   Hello, I am xjs years old
MTT sayhello.apply (XJS, [24]);   Hello, I am xjs years old

The arguments that the bind method passes to the calling function can be listed individually or in an array. The most significant difference between the bind method and call, apply is the function that returns a binding context

//hello, I am xlj years old //hello, I am xlj years old

Bind

var bind = Function.prototype.call.bind (Function.prototype.bind), var zlw = {name: "ZLW"};function Hello () {  // Hello, I am ZLW

JS to call Apply bind understanding