总结js常用函数和常用技巧

var Ajax = function(url, type success, error) {
 $.ajax({
 url: url,
 type: type,
 dataType: 'json',
 timeout: 10000,
 success: function(d) {
 var data = d.data;
 success && success(data);
 },
 error: function(e) {
 error && error(e);
 }
 });};// 使用方法：Ajax('/data.json', 'get', function(data) {
 console.log(data);});

function jsonp(config) {
 var options = config || {}; // 需要配置url, success, time, fail四个属性
 var callbackName = ('jsonp_' + Math.random()).replace(".", "");
 var oHead = document.getElementsByTagName('head')[0];
 var oScript = document.createElement('script');
 oHead.appendChild(oScript);
 window[callbackName] = function(json) { //创建jsonp回调函数
 oHead.removeChild(oScript);
 clearTimeout(oScript.timer);
 window[callbackName] = null;
 options.success && options.success(json); //先删除script标签，实际上执行的是success函数
 };
 oScript.src = options.url + '?' + callbackName; //发送请求
 if (options.time) { //设置超时处理
 oScript.timer = setTimeout(function () {
 window[callbackName] = null;
 oHead.removeChild(oScript);
 options.fail && options.fail({ message: "超时" });
 }, options.time);
 }};// 使用方法：jsonp({
 url: '/b.com/b.json',
 success: function(d){
 //数据处理
 },
 time: 5000,
 fail: function(){
 //错误处理
 } });

var validate = function(num) {
 var exp = /^1[3-9]\d{9}$/;
 return exp.test(num);};

var exp = /^[1-9]{1}[0-9]{14}$|^[1-9]{1}[0-9]{16}([0-9]|[xX])$/;

var exp = /^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$/;

$(window).scroll(function() {
 var a = $(window).scrollTop();
 if(a > 100) {
 $('.go-top').fadeIn();
 }else {
 $('.go-top').fadeOut();
 }});$(".go-top").click(function(){
 $("html,body").animate({scrollTop:"0px"},'600');});

function stopBubble(e){
 e = e || window.event; 
 if(e.stopPropagation){
 e.stopPropagation(); //W3C阻止冒泡方法 
 }else { 
 e.cancelBubble = true; //IE阻止冒泡方法 
 } }

var replaceAll = function(bigStr, str1, str2) { //把bigStr中的所有str1替换为str2
 var reg = new RegExp(str1, 'gm');
 return bigStr.replace(reg, str2);}

var getURLParam = function(name) {
 return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)', "ig").exec(location.search) || [, ""])[1].replace(/\+/g, '%20')) || null;};

function cloneObj(obj) {
 var o = obj.constructor == Object ? new obj.constructor() : new obj.constructor(obj.valueOf());
 for(var key in obj){
 if(o[key] != obj[key] ){
 if(typeof(obj[key]) == 'object' ){
 o[key] = mods.cloneObj(obj[key]);
 }else{
 o[key] = obj[key];
 }
 }
 }
 return o;}

var unique = function(arr) {
 var result = [], json = {};
 for (var i = 0, len = arr.length; i < len; i++){
 if (!json[arr[i]]) {
 json[arr[i]] = 1;
 result.push(arr[i]); //返回没被删除的元素
 }
 }
 return result;};

var isRepeat = function(arr) { //arr是否有重复元素
 var hash = {};
 for (var i in arr) {
 if (hash[arr[i]]) return true;
 hash[arr[i]] = true;
 }
 return false;};

function randombetween(min, max){
 return min + (Math.random() * (max-min +1));}

own.setCookie = function(cname, cvalue, exdays){
 var d = new Date();
 d.setTime(d.getTime() + (exdays*24*60*60*1000));
 var expires = 'expires='+d.toUTCString();
 document.cookie = cname + '=' + cvalue + '; ' + expires;};own.getCookie = function(cname) {
 var name = cname + '=';
 var ca = document.cookie.split(';');
 for(var i=0; i< ca.length; i++) {
 var c = ca[i];
 while (c.charAt(0) == ' ') c = c.substring(1);
 if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
 }
 return '';};

(function(a, b) {
 console.log(a+b); //30})(10, 20);

var arr = [12, 222, 44, 88];
arr.length = 2; //截取，arr = [12, 222]; 
arr.length = 0; //清空，arr will be equal to [].

var numbers = [5, 45822, 120, -215];
var maxInNumbers = Math.max.apply(Math, numbers); //45822
var minInNumbers = Math.min.apply(Math, numbers); //-215

0.1 + 0.2 == 0.3 //false

var arr = [1, 5, 6, 3]; //数字数组
arr.sort(function(a, b) {
 return a - b; //从小到大排
 return b - a; //从大到小排
 return Math.random() - 0.5; //数组洗牌
});

var arr = [{ //对象数组
 num: 1,
 text: 'num1'
}, {
 num: 5,
 text: 'num2'
}, {
 num: 6,
 text: 'num3'
}, {
 num: 3,
 text: 'num4'
}]; 
arr.sort(function(a, b) {
 return a.num - b.num; //从小到大排
 return b.num - a.num; //从大到小排
});

var obj = {a: 'aaa', b: 'bbb'};
var objStr = JSON.stringify(obj); // "{"a":"aaa","b":"bbb"}"
var newObj = JSON.parse(objStr); // {a: "aaa", b: "bbb"}

1.git config --global user.email xxx@163.com
2.git config --global user.name xxx
3.ssh-keygen -t rsa -C xxx@163.com(邮箱地址) // 生成ssh
4.找到.ssh文件夹打开，使用cat id_rsa.pub //打开公钥ssh串
5.登陆github，settings － SSH keys － add ssh keys （把上面的内容全部添加进去即可）

1、git config user.name / user.email //查看当前git的用户名称、邮箱
2、git clone https://github.com/jarson7426/javascript.git project //clone仓库到本地。
3、修改本地代码，提交到分支: git add file / git commit -m “新增文件”
4、把本地库推送到远程库: git push origin master
5、查看提交日志：git log -5
6、返回某一个版本：git reset --hard 123
7、分支：git branch / git checkout name / git checkout -b dev
8、合并name分支到当前分支：git merge name / git pull origin
9、删除本地分支：git branch -D name
10、删除远程分支： git push origin :daily/x.x.x
11、git checkout -b mydev origin/daily/1.0.0 //把远程daily分支映射到本地mydev分支进行开发
12、合并远程分支到当前分支 git pull origin daily/1.1.1
13、发布到线上：
 git tag publish/0.1.5
 git push origin publish/0.1.5:publish/0.1.5
14、线上代码覆盖到本地：
 git checkout --theirs build/scripts/ddos
 git checkout --theirs src/app/ddos