Array 与Array.of
console.log(Array(3)) // [empty x 3]
console.log(Array(3, 4)) // [3, 4]
console.log(new Array(3)) // [empty x 3]
console.log(new Array(3, 4)) // [3, 4]
console.log(Array.of(3)) // [3]
console.log(Array.of(3, 4)) // [3, 4]
请创建一个长度为100，值为对应下标的数组
[...Array(100).keys()]
Array.prototype.keys返回一个可迭代对象
终极版本防抖
function debunce(fn,wait,immediate){
var timer = null
var canRun = false
const debunced = function(fn,wait,immedaite){
return function(){
if(immeadiate){
}
}
}
debunced.cancel = function(){}
return debunced(fn,wait,immediate)
}
