//快排
function qSort(arr){
if(arr.length <= 1){
return arr;
}
const leftArr=[];
const rightArr=[];
//用数组方法取出要排序的一个数
const center = arr.shift();
arr.forEach((item,index)=>{
if(item<center){
leftArr.push(item);
}else{
rightArr.push(item);
}
})
const newArr = qSort(leftArr).concat(center,qSort(rightArr));
return newArr;
}
const arr1 = [3,5,7,1,2];
const re = qSort(arr1);
console.log(re);
<script>
//节流
function center(){
//核心代码
console.log(this);
}
document.onmousemove = throllted(center,500);
function throllted(fn,time){
let lastTime = 0;
return function (){
//获取时间戳来作为看门狗
let nowTime = Date.now();
//看门狗
if(nowTime - lastTime < time){
return;
}
lastTime= nowTime;
fn.call(this,arguments[0]);
}
}
</script>
<body>
<input type="text" id="inp">
<script>
const inp =document.getElementById("inp");
//核心代码
function center(e){
console.log(e);
consoel.log(this);
}
inp.oninput =debounce(center,300);
//封装一个防抖函数
function debounce(fn,time){
//初始化一个定时器
let timer = null;
return function () {
clearTimeout(timer);
var _this =this;
var e = arguments[0];
//使用定时器让代码延迟执行
timer =setTimeout(function () {
//控制核心函数的事件和对象
fn.call(_this,e)
}, time);
}
}
</script>
</body>
``
//深拷贝
//判断数据类型
function unType(data){
return Object.prototype.toString.call(data).slice(8.-1).toLowserCase();
}
function deepClone(data){
if(data === "object"){
var newObj ={};
}else if(data === "array"){
var newObj =[];
}else{
return data;
}
for(let key in data){
newObj[key] = deepClone(data[key]);
}
return newObj;
}
