js前端一些操作整理

异步加载js，

function loadScript(url, callback){
    var script = document.createElement("script")
    script.type = "text/javascript";
    if (script.readyState){ //IE
        script.onreadystatechange = function(){
            if (script.readyState == "loaded" || script.readyState == "complete"){
                script.onreadystatechange = null;
                callback();
            }
        };
    } else { //Others: Firefox, Safari, Chrome, and Opera
        script.onload = function(){
            callback();
        };
    }
    script.src = url;
    document.body.appendChild(script);
}

数组去重js，

function oSort(arr)
{
	var result ={};
	var newArr=[];
	for(var i=0;i<arr.length;i++)
	{
		if(!result[arr[i]])
		{
			newArr.push(arr[i])
			result[arr[i]]=1
		}
	}
	return newArr
}

深度克隆，

Object.prototype.deepClone=function(){
	function cloneObj(){}   
	cloneObj.prototype=this;
	var obj=new cloneObj();
	for(var o in obj){
		if(typeof(obj[o])=="object")obj[o]=obj[o].deepClone();
	}
	return obj;
}

原生js代码ajax，

var xmlHttp; 
function createxmlHttpRequest() { 
	if (window.ActiveXObject) { 
		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
	} else if (window.XMLHttpRequest) { 
		xmlHttp=new XMLHttpRequest(); 
	} 
	function doPost(url,data){ 
// 注意在传参数值的时候最好使用encodeURI处理一下，以防出现乱码 
createxmlHttpRequest(); 
xmlHttp.open("POST",url); 
xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 
xmlHttp.send(data); 
xmlHttp.onreadystatechange = function() { 
	if ((xmlHttp.readyState == 4) && (xmlHttp.status == 200)) { 
		alert('success'); 
	} else { 
		alert('fail'); 
	} 
} 
} 
} 

排序，

快速排序：
function oSort(arr)
{
	var left=[];
	var right=[];
	var oNum = Math.floor(arr.length/2);
	var oNumVode = arr.splice(oNum,1);
	for(var i=0;i<arr.length;i++)
	{
		if(arr[i]<oNumVode)
		{
			left.push(arr[i])
		}
		else
		{
			right.push(arr[i])
		}
	}
	return oSort(left).concat([oNumVode],oSort(right))
}

冒泡排序： 
var array = [5, 4, 3, 2, 1];
var temp = 0;
for (var i = 0; i < array.length; i++)
{
	for (var j = 0; j < array.length - i; j++)
	{
		if (array[j] > array[j + 1])
		{
			temp = array[j + 1];
			array[j + 1] = array[j];
			array[j] = temp;
		}
	}
}

这几天mark的一些代码，放在这里啦。

转载于:https://www.cnblogs.com/stonl/p/4451829.html