ES6 Sharing--the deconstruction assignment of variables

the destructor assignment of a variable: ES6 allows you to extract values from arrays and objects in a certain pattern, assigning values to variables, which is called deconstruction (destructuring).

The previous wording:

var a = 1;var B = 2;

ES6 allowable wording:

Let [A, b] = [+];

General Purpose:

1. Value of exchange variable

[x, Y] = [y,x];

2. function returns multiple values

Function F1 () {return [+];} var [a,b,c] = F1 ();//Return JSON object: function F1 () {return {id:1,name: "Xiaoming"};} var {id,name} = f1 ();

3, the function of the order-free definition

Function F1 ({a,b,c}) {//...} F1 ({a=1,c=3,b=2});

4. Default values for parameters

Function F1 (a=1,b=2) {//...}

5. Traverse Map Deconstruction

var map = new map (), Map.set ("First": "Hello"), Map.set ("second": "World"),//Get key and Valuefor (let [key,value] of map) {//...} Get only keyfor (let [key] of map) {//...}

ES6 Sharing--the deconstruction assignment of variables