The difference between the functions and methods javascript

1. What is the function?

First, look at the data type -------------------- data type introduced article

• Basic data types : numeric (number), string (string), Boolean (Boolean), null, undefined
• Complex data types : an object (object), the constructor (function), the array (Array), etc.
• Complex data type called reference data types

Function is a complex data types , it is stored in a stack inside the address stored in the stack inside the data

The concept of functions

For js, the function is arbitrary piece of code in a box inside

When I want to make this code is executed, direct the implementation of the box inside the code on the line

javascript authoritative guide explains:
function (function): function is a JavaScript snippet with the name (named) and parameters can be defined once many times transfer

2. What is the method?

The conceptual approach

javascript authoritative guide explains:
method (method): When the function and objects co-wrote together, function becomes a "method" (method) // When the function assigned to the object's attributes, we called the "method"

• Object :
  1. JavaScript, everything is an object: strings, numbers, arrays, dates, and so on.
  2. In JavaScript, the object is to have the properties and methods of data.

 	      var obj = {
 	        name : '张三',
 	        age : 18
	     }

Functions and objects co-wrote together

var obj = {
   name : '张三',
   age : 18
   fun : function(){
       console.log(this.name) //这里的this指向的是obj这个对象
     }//fun就成了该对象的一个方法
 }
	     
或者这样
var abc = function(){
    ......
}

3. The difference between the functions and methods

The functions and methods are essentially the same, but the method is a special case function is a function of the value assigned to the objects

The method is also a function, but rather special