fuchao2012

相同点

apply 、 call 、bind 三者都是用来改变函数的this对象的指向的； apply 、 call 、bind 三者第一个参数都是this要指向的对象，也就是想指定的上下文； apply 、 call 、bind 三者都可以利用后续参数传参；

不同点

bind 是返回对应函数，便于稍后调用；

fuchao2012

/*实现一个响应式的正方形布局，第一反应*/

.container{
	width:100%;
  	height:100vw;
}

/*

不过这货兼容性...只能说还行

fuchao2012

//Thanks to https://javascriptweblog.wordpress.com/2011/08/08/fixing-the-javascript-typeof-operator/

// typeof now
// Undefined => 		"undefined"
// Null => 				"object" 	*** fu*king mistake here ***
// Boolean => 			"boolean"
// Number => 			"number"
// String => 			"string"
// Object(uncallable) => "object"
// Array => 			"object"

fuchao2012

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

fuchao2012

// ES5-
if(!Object.prototype.isEmptyObject){
	Object.prototype.isEmptyObject = function(value){
    	for (var key in value) {
        	if (hasOwnProperty.call(value, key)) {
          		return false;
        	}
      	}
      	return true;
    }

fuchao2012

if(!String.prototype.trim){ //ES5 IE9+
//regexp
String.prototype.trim=function(){
	return this.replace(/(^\s+)|(\s+$)/g, '')
}
}

fuchao2012

//Fisher-Yates 舒服了

Array.prototype.shuffle=function(){
	let results = [], temp, acc = this.length >>> 0
    while(acc > 0){
    	temp = (Math.random() * acc--)>>>0
        [this[acc],this[temp]] = [this[temp], this[acc]]
    }
    return this
}

fuchao2012

// demo
let privateDataStore = {
	set(val){
    	let key = Symbol(Math.random().toString(32).substr(2))
        this[key]=val
        return key
    }
    get(key){
    	return this[key]
    }

fuchao2012

let fetch = ()=>{
	return new Promise((resolve, reject)=>{
    	api.call('fetch_data', (err, data)=>{
        	if(err) return 	reject(err)
            resolve(data)
        })
    })
}

fetch('data/url/to')

fuchao2012

function* fib(){
  let a=1, b=1
  yield a
  yield b
  while(true){
    let next = a+b
    a=b
    b=next
    yield next
  }