Spread, Rest and Destructuring assignment in JavaScript

spread operator: ..., 展開東西
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_operator (只講解ES6的)
ES6: array展開. e.g. array object展開成arguments丟進function or c=[...a]
ES7: object類. c= {...a, ...b}

rest operator:..., 變成一個, for destructuring arrays and objects
ES6 rest parameters: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters

function fun1(...theArgs) {
  console.log(theArgs.length);
}

Destructuringassignment [https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuringassignment](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment) Array destructuring
[a, b, ...rest] = [1, 2, 3, 4, 5]; 是Rest operator, ES6

Object destructuring c = {a:1, b:2};

{a, b} = c

or

({a, b} = {a:1, b:2})

其他:
var c= {a,b} -> ES6

用來測試的: http://ES6console.com/