...log(item);//black
console.log(colors);//["blue", "white", "red"]
//模拟反向队列
var count=colors.unshift("grey","voilet");
console.log(count);//5
console.log(colors);//["grey", "voilet", "blue", "white", "red"]
//重排序方法
var values=[1,2,3,4,5];
values.reverse();
console.log(va...