Random Array

shuffle.js

//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
}

//Little Shuffle 

Array.prototype.shuffle = function(){
	return this.sort(()=>.5 - Math.random())
}