本文主要介紹了jquery源碼中常見的知識點以及javascript中原型鏈常見的知識點，非常的全面，這里推薦給小伙伴們。

一、jquery源碼中常見的知識點

1.string，number類型轉(zhuǎn)換的快捷方法

代碼如下:

// @param s為字符串，n為數(shù)字

function fn(obj){

//轉(zhuǎn)換為String類型

var s = obj +"";

//轉(zhuǎn)換為number類型

var n = +obj;

}

　　分享一個面試?yán)樱?/P>

//加會將其后面自動轉(zhuǎn)換成字符串

"64"+4="644"

//減會將其自動轉(zhuǎn)換成數(shù)字

"64"-4=60

　　2.bool類型轉(zhuǎn)換

　　!!obj，將其強制轉(zhuǎn)換為bool類型

代碼如下:

alert(!!0) //結(jié)果為false

alert(!!"33dd") //結(jié)果為true

　　!obj，取相反的bool類型

代碼如下:

alert(!0) //結(jié)果為true

alert(!"222333") //結(jié)果為false

　　3.=== 與 ==區(qū)別

　　=== 是嚴(yán)格相等，不會進行類型轉(zhuǎn)換，而 == 是不嚴(yán)格相等，會進行類型轉(zhuǎn)換。有些js的書中，建議開發(fā)人員永遠(yuǎn)不要用 == 或者 != 。

　　但是jquery源碼中，有用到“==”或者“!=”的情況 —— 判斷 undefined 和 null 的時候。

代碼如下:

//這里的判斷，將obj是null，obj是undefined都排除在外了

if(obj != null){

}

　　4.檢測obj是否為window對象

代碼如下:

//null == window.null為true

function isWindow(obj){

return obj != null && obj == window.obj;

}

　　5.|| 與 && 用法技巧

代碼如下:

//例 var aa=5; name = aa || {} ; alert(name) 則name為55

this.name = name || {} //如果name值存在，則值為name，反之為{}

//例 var aa=5; name = aa && {} ; alert(name) 則name為{}，因為aa為5，不為0則為真

this.name = bool && [] //如果bool為true，則值為[],反之則為bool

　　經(jīng)典實例:

代碼如下:

( window.foo || ( window.foo = "bar" ) );

alert(window.foo); //彈出 bar

// 為什么最后的結(jié)果是bar呢，其實可以看成是 undefined || bar 出來的結(jié)果肯定是bar

　　6.setTimeout(fn,0)與setTimeout(fn)區(qū)別

　　setTimeout(fn,0)與setTimeout(fn)都是延遲執(zhí)行，但是setTimeout(fn)比setTimeout(fn,0)延遲時間還要長，例

代碼如下:

function fn(){

var data = new Date();

for(var i=0;i<=1000;i++){

if(i==1000){

console.log("fn="+data.getTime());

}

}

}

function fn1(){

var data = new Date();

for(var i=0;i<=1000;i++){

if(i==1000){

console.log("fn1="+data.getTime());

}

}

}

setTimeout(fn,0),

setTimeout(fn1);

　　結(jié)果：

　　7.判斷是否為數(shù)值

代碼如下:

function isNumeric(obj){

return !isNaN(parseFloat(obj)) && isFinite(obj);

}

　　8.判斷是否為空對象

代碼如下:

function isEmptyObject(){

var name;

//遍歷不是空對象返回

for (name in obj) {

return false;

}

return true;

}

　　9.檢測對象類型

　　檢測obj對象類型，返回類型,通過Object.prototype.toString()來判斷類型，但是ie低版本兼容性有問題，因此采用{}.toString來監(jiān)測，返回為[object Array],[object Object],[object Function]

代碼如下:

// 類型判斷

function isType(type){

return function(o){

return Object.prototype.toString.call(o) === '[object ' + type + ']';

}

}

var isString = isType(“String”);

var isObject = isType("Object");

var isArray = isType("Array");

isString("I'm Barret Lee.");

isArray([1,2,3])；

isObject({});

　　10.jquery里的去除空格trim妙用

代碼如下:

//相當(dāng)于if (String.prototype.trim && “\uFEFF\xA0″.trim() !== “”)高級的瀏覽器已經(jīng)支持原生的String的trim方法，但是pFan還為了避免它沒法解析全角空白，所以加多了一個判斷：”\uFEFF\xA0″.trim() !== “”

vart core_version = "1.0",core_trim = core_version.trim;

function trim(){

core_trim && !core_trim.call("\uFEFF\xA0") ?

function (text) {

return text == null ?

"" :

core_trim.call(text); //這里按我的理解應(yīng)該為" ".trim.call(text),有點不明白轉(zhuǎn)換為"1.1.0".trim.call(text)

} :

// 高級的瀏覽器已經(jīng)支持原生的String的trim方法，如果瀏覽器不支持則采用

function (text) {

var whitespace = "[\\x20\\t\\r\\n\\f]",

rtrim = new RegExp("^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g");

return text == null ?

"" :

(text + "").replace(rtrim, "");

},

//nodeName函數(shù)是獲取dom節(jié)點的節(jié)點名字或者判斷其名字跟傳入?yún)?shù)是否匹配

nodeName: function(elem,name){

//IE下，DOM節(jié)點的nodeName是大寫的，例如DIV

return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();

}

}

　　11.jquery中檢測數(shù)組或者類數(shù)組中是否含存在傳入的值

代碼如下:

/**

檢查數(shù)組中是否存在傳入的值，如果存在就返回值所在的位置，如果不存在就返回-1。

*elem 規(guī)定需檢索的值。

*arr 數(shù)組

*i 可選的整數(shù)參數(shù)。規(guī)定在數(shù)組中開始檢索的位置。它的合法取值是 0 到 arr.length - 1。如省略該參數(shù)，則將從數(shù)組首元素開始檢索。

*/

function inArray(elem, arr, i){

var len;

if (arr) {

//如果瀏覽器支持Array擁有indexOf方法

if ([].indexOf) {

return [].indexOf.call(arr, elem, i);

}

len = arr.length;

//當(dāng)i為負(fù)數(shù)的時候，從數(shù)組后邊len+i的位置開始索引

//理解這個分成兩個部分i = i ? (i < 0 ? Math.max(0, len + i) : i) : 0;，i=i為true，執(zhí)行(i < 0 ? Math.max(0, len + i) : i)，反正執(zhí)行i=0

i = i ? i < 0 ? Math.max(0, len + i) : i : 0;

for (; i < len; i++) {

// 雙重檢測防止類似這樣的數(shù)組 ar = [];ar[1]=1;ar[0] = undefined; 0 in ar =false;a[0]===undefined;

// 0 in arr => arr[0]是否存在 'nme' in arr => arr['nme']是否存在

if (i in arr && arr[i] === elem) {

return i;

}

}

}

return -1;

}

二、javascript中原型鏈常見的知識點

　　1.hasOwnProperty()方法

　　 使用hasOwnProperty()方法可以檢測一個屬性是存在與實例，還是存在于原型中。這個方法從Object繼承，只在給定屬性存在于對象實例中時，才會返回true。

代碼如下:

function Person(){

this.age=25;

this.job="web";

}

Person.prototype={

name:'pingfan',

sayName:function(){

alert(this.name);

}

}

var person1=new Person();

//來自構(gòu)造函數(shù)，檢測屬性，也返回true

alert(person1.hasOwnProperty("age"));

//來自原型屬性，返回false

alert(person1.hasOwnProperty("name"));

person1.name='ping';

//來自實例屬性，返回true

alert(person1.hasOwnProperty("name"));

　　2.通過instanceOf保證只實例一次

代碼如下:

function shiCha(opt){

//只實例一次

if( !(this instanceof shiCha)){

return new shiCha(opt);

}

}

var shicha = shiCha();

　　3.javascript中Array.prototype.slice.call(arguments)　　

　　我們通?？吹紸rray.prototype.slice.call(arguments,1)或者Array.prototype.slice.call(arguments)，都有點摸不著頭腦，其實我們就是借助Array.prototype中slice()將arguments變成一個數(shù)組，并且使用該數(shù)組工作更方便，第二個參數(shù)是從索引值，開始將其變成數(shù)組，例Array.prototype.call("22223",2)和Array.prototype.call([1,2,3,4],2)，從字符串第二個開始。

代碼如下:

function sliArray(array){

//輸出為從索引1到索引3

return Array.prototype.slice.call(array,1,3);

}

alert(sliArray([1,2,3,4,5,6])) //結(jié)果為2,3

　　4. 利用空對象F，實現(xiàn)對象繼承，效率最高

代碼如下:

//利用空對象做媒介，進行繼承效果最佳

function inhert(C,P){

var F=function(){};

F.protototype = P.prototype;

C.prototype = new F();

C.prototype.constructor = C;

}

三、javascript中常用方法集

1. 常見的數(shù)組操作方法

　　數(shù)組去重：

代碼如下:

//數(shù)組去重原型

Array.prototype.unqie = function(){

var arr = this, len=this.length, obj={}, newArr=[];

while(len--){

if(obj[ arr[len] ] !== arr[len]){

obj[arr[len]] = arr[len]; newArr.push( arr[len]);

}

}

return newArr.reverse();

}

　　取數(shù)組中最大值：

代碼如下:

Array.prototype.arrMax=function(){

var arr=this, len=this.length,max=arr[0];

for(var i=1;i<len;i++){

if(max<arr[i]){

max=arr[i];

}

}

return max;

}

//數(shù)組中通過sort取最大值

Array.prototype.arrMax=function(){

var arr=this;

arr.sort(function(a,b){

return a-b;

})

return arr[arr.length-1];

}

//利用Math.max取數(shù)組最大值

Array.prototype.arrMax =function(){

var array = this;

return Math.max.apply(null, array);

}

alert([1,2,3,4,5,6,9,8,7,9].arrMax());

　　取數(shù)組中最小值：

代碼如下:

//數(shù)組中最的小值

Array.prototype.arrMin=function(){

var arr=this, len=this.length,min=arr[0];

for(var i=1;i<len;i++){

if(min>arr[i]){

min=arr[i];

}

}

return min;

}

//數(shù)組中通過sort取最的小值

Array.prototype.arrSortMin=function(){

var arr=this;

arr.sort(function(a,b){

return a-b;

})

return arr[0];

}

//利用Math.max取數(shù)組最大值

Array.prototype.arrSortMin =function(){

var array = this;

return Math.min.apply(null, array);

}

alert([1,2,3,4,5,6,9,8,7,9].arrSortMin());

　　復(fù)制數(shù)組：

代碼如下:

Array.prototype.copy =

function() {

return [].concat(this);

};

　　去除數(shù)組中只指定元素，只能去除一個，如果想多個，之前先用unique處理：

代碼如下:

Array.prototype.remove = function(value){

for(var i=0,len=this.length;i<len;i++)

{

if(this[i]==value){

this.splice(i, 1);

break;

}

}

return this;

}

　　2.操作document.loaction的方法集（這里借用了園友總結(jié)的相關(guān)方法）

代碼如下:

pFan.url = { //#URL

//參數(shù)：變量名，url為空則表從當(dāng)前頁面的url中取

getQuery: function (name, url) {

var u = arguments[1] || window.location.search

, reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)")

, r = u.substr(u.indexOf("?") + 1).match(reg)

;

return r != null ? r[2] : "";

}

, getHash: function (name, url) { //# 獲取 hash值

var u = arguments[1] || location.hash;

var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");

var r = u.substr(u.indexOf("#") + 1).match(reg);

if (r != null) {

return r[2];

}

return "";

}

, parse: function (url) { //# 解析URL

var a = document.createElement('a');

url = url || document.location.href;

a.href = url;

return {

source: url

, protocol: a.protocol.replace(':', '')

, host: a.hostname

, port: a.port

, query: a.search

, file: (a.pathname.match(/([^\/?#]+)$/i) || [, ''])[1]

, hash: a.hash.replace('#', '')

, path: a.pathname.replace(/^([^\/])/, '/$1')

, relative: (a.href.match(/tps?:\/\/[^\/]+(.+)/) || [, ''])[1]

, segments: a.pathname.replace(/^\//, '').split('/')

};

}

};

　　3.常用的正則表達式

代碼如下:

pFan.regExp = { //# 字符串匹配

//是否為 數(shù)字！整數(shù)，浮點數(shù)

isNum: function (num) { //# 是否為數(shù)組

return !isNaN(num);

}

, isEmail: function (mail) {//# 是否為 郵箱

return /^([a-z0-9]+[_\-\.]?)*[a-z0-9]+@([a-z0-9]+[_\-\.]?)*[a-z0-9]+\.[a-z]{2,5}$/i.test(mail);

}

, isIdCard: function (card) { //# 是否為 身份證

return /^(\d{14}|\d{17})(\d|[xX])$/.test(card);

}

, isMobile: function (mobile) { //# 是否為 手機

return /^0*1\d{10}$/.test(mobile);

}

, isQQ: function (qq) { //# 是否為 QQ

return /^[1-9]\d{4,10}$/.test(qq);

}

, isTel: function (tel) { //# 是否為 電話

return /^\d{3,4}-\d{7,8}(-\d{1,6})?$/.text(tel);

}

, isUrl: function (url) { //# 是否為 URL

return /https?:\/\/[a-z0-9\.\-]{1,255}\.[0-9a-z\-]{1,255}/i.test(url);

}

, isColor: function (color) { //# 是否為 16進制顏色

return /#([\da-f]{3}){1,2}$/i.test(color);

}

//@id ： 身份證 ，

// @now : 當(dāng)前時間 如：new Date('2013/12/12') , '2013/12/12'

// @age ： 允許的年齡

, isAdult: function (id, allowAge, now) { //# 是否年齡是否成年

var age = 0 // 用戶 年月日

, nowDate = 0 //當(dāng)前年月日

;

allowAge = parseFloat(allowAge) || 18;

now = typeof now == 'string' ? new Date(now) : (now || new Date());

if (!this.isIdCard(id)) {

return false;

}

//15位身份證

if (15 == id.length) {

age = '19' + id.slice(6, 6);

} else {

age = id.slice(6, 14);

}

// 類型轉(zhuǎn)換 整型

age = ~~age;

nowDate = ~~(Tydic.date.format('YYYYMMDD', now));

//比較年齡

if (nowDate - age < allowAge * 1e4) {

return false;

}

return true;

}

//浮點數(shù)

, isFloat: function (num) { //# 是否為 浮點數(shù)

return /^(([1-9]\d*)|(\d+\.\d+)|0)$/.test(num);

}

//正整數(shù)

, isInt: function (num) { //# 是否為 正整數(shù)

return /^[1-9]\d*$/.test(num);

}

//是否全為漢字

, isChinese: function (str) { //# 是否全為 漢字

return /^([\u4E00-\u9FA5]|[\uFE30-\uFFA0])+$/gi.test(str);

}

};

　　4.操作className的方法集

代碼如下:

PFan.conClass = {

hasClass:function(){

return ele.className.match(new RegExp('());

},

addClass:function(){

if (!hasClass(ele,cls)) ele.className += " "+cls;

},

removeClass:function(){

if (hasClass(ele,cls)) {

var reg = new RegExp('();

ele.className=ele.className.replace(reg,' ');

}

}

}

　　5.操作字符串方法

代碼如下:

pFan.string = { //# 字符串

codeHtml: function (content) { //# 轉(zhuǎn)義 HTML 字符

return this.replace(content, {

'&': "&"

, '"': """

, "'": '''

, '<': "<"

, '>': ">"

, ' ': " "

, '\t': " "

, '(': "("

, ')': ")"

, '*': "*"

, '+': "+"

, ',': ","

, '-': "-"

, '.': "."

, '/': "/"

, '?': "?"

, '\\': "\"

, '\n': "<br>"

});

}

//重復(fù)字符串

, repeat: function (word, length, end) { //# 重復(fù)字符串

end = end || ''; //加在末位

length = ~~length;

return new Array(length * 1 + 1).join(word) + '' + end;

}

//增加前綴

, addPre: function (pre, word, size) { //# 補齊。如給數(shù)字前 加 0

pre = pre || '0';

size = parseInt(size) || 0;

word = String(word || '');

var length = Math.max(0, size - word.length);

return this.repeat(pre, length, word);

}

//去除兩邊空格

, trim: function (text) { //# 去除兩邊空格

return (text || '').replace(/^\s+|\s$/, '');

}

//去除左邊空格

,ltrim:function(){

return s.replace( /^(\s*|　*)/, "");

}

//去除右邊空格

,rtrim:function(){

return s.replace( /(\s*|　*)$/, "");

}

//返回腳本內(nèi)容

,evalscript:function(s) {

if(s.indexOf('<script') == -1) return s;

var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;

var arr = [];

while(arr = p.exec(s)) {

var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;

var arr1 = [];

arr1 = p1.exec(arr[0]);

if(arr1) {

appendscript(arr1[1], '', arr1[2], arr1[3]);

} else {

p1 = /<script(.*?)>([^\x00]+?)<\/script>/i;

arr1 = p1.exec(arr[0]);

appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1);

}

}

return s;

}

//清除腳本內(nèi)容

,stripscript:function(){

return s.replace(/<script.*?>.*?<\/script>/ig, '');

}

//字符串替換

, replace: function (str, re) { //# 字符串替換

str = str || '';

for (var key in re) {

replace(key, re[key]);

};

function replace(a, b) {

var arr = str.split(a);

str = arr.join(b);

};

return str;

}

, xss: function (str, type) { //# XSS 轉(zhuǎn)義

//空過濾

if (!str) {

return str === 0 ? "0" : "";

}

switch (type) {

case "html": //過濾html字符串中的XSS

return str.replace(/[&'"<>\/\\\-\x00-\x09\x0b-\x0c\x1f\x80-\xff]/g, function (r) {

return "&#" + r.charCodeAt(0) + ";"

}).replace(/ /g, " ").replace(/\r\n/g, "<br />").replace(/\n/g, "<br />").replace(/\r/g, "<br />");

break;

case "htmlEp": //過濾DOM節(jié)點屬性中的XSS

return str.replace(/[&'"<>\/\\\-\x00-\x1f\x80-\xff]/g, function (r) {

return "&#" + r.charCodeAt(0) + ";"

});

break;

case "url": //過濾url

return escape(str).replace(/\+/g, "%2B");

break;

case "miniUrl":

return str.replace(/%/g, "%25");

break;

case "script":

return str.replace(/[\\"']/g, function (r) {

return "\\" + r;

}).replace(/%/g, ", ", ", "");

break;

case "reg":

return str.replace(/[\\\^\$\*\+\?\{\}\.\(\)\[\]]/g, function (a) {

return "\\" + a;

});

break;

default:

return escape(str).replace(/[&'"<>\/\\\-\x00-\x09\x0b-\x0c\x1f\x80-\xff]/g, function (r) {

return "&#" + r.charCodeAt(0) + ";"

}).replace(/ /g, " ").replace(/\r\n/g, "<br />").replace(/\n/g, "<br />").replace(/\r/g, "<br />");

break;

}

}

// badword , 過濾敏感詞

//@text : 要過濾的文本 , 類型 ：字符串

//@words : 敏感詞 ，類型，數(shù)組, 如 ： ['你妹', '我丟' ,'我靠']

// 如果 用 正則匹配， text 長度 100萬，words 100萬，需要 4秒！

, badWord: function (text, words) { //# 敏感詞過濾

text = String(text || '');

words = words || [];

var reg = new RegExp(words.join('|'), 'g')

, _self = this;

return text.replace(reg, function ($0) {

var length = String($0 || '').length;

return _self.repeat('*', length);

});

}

};

　　6.加密方法集

代碼如下:

pFan.encrypt = { //# 加密

md5: function (words) { //# md5 哈希算法

/*

* Crypto-JS 3.1.2

*

*/

var CryptoJS = function (s, p) {

var m = {}, l = m.lib = {}, n = function () { }, r = l.Base = { extend: function (b) { n.prototype = this; var h = new n; b && h.mixIn(b); h.hasOwnProperty("init") || (h.init = function () { h.$super.init.apply(this, arguments) }); h.init.prototype = h; h.$super = this; return h }, create: function () { var b = this.extend(); b.init.apply(b, arguments); return b }, init: function () { }, mixIn: function (b) { for (var h in b) b.hasOwnProperty(h) && (this[h] = b[h]); b.hasOwnProperty("toString") && (this.toString = b.toString) }, clone: function () { return this.init.prototype.extend(this) } }, q = l.WordArray = r.extend({ init: function (b, h) { b = this.words = b || []; this.sigBytes = h != p ? h : 4 * b.length }, toString: function (b) { return (b || t).stringify(this) }, concat: function (b) { var h = this.words, a = b.words, j = this.sigBytes; b = b.sigBytes; this.clamp(); if (j % 4) for (var g = 0; g < b; g++) h[j + g >>> 2] |= (a[g >>> 2] >>> 24 - 8 * (g % 4) & 255) << 24 - 8 * ((j + g) % 4); else if (65535 < a.length) for (g = 0; g < b; g += 4) h[j + g >>> 2] = a[g >>> 2]; else h.push.apply(h, a); this.sigBytes += b; return this }, clamp: function () { var b = this.words, h = this.sigBytes; b[h >>> 2] &= 4294967295 << 32 - 8 * (h % 4); b.length = s.ceil(h / 4) }, clone: function () { var b = r.clone.call(this); b.words = this.words.slice(0); return b }, random: function (b) { for (var h = [], a = 0; a < b; a += 4) h.push(4294967296 * s.random() | 0); return new q.init(h, b) } }), v = m.enc = {}, t = v.Hex = { stringify: function (b) { var a = b.words; b = b.sigBytes; for (var g = [], j = 0; j < b; j++) { var k = a[j >>> 2] >>> 24 - 8 * (j % 4) & 255; g.push((k >>> 4).toString(16)); g.push((k & 15).toString(16)) } return g.join("") }, parse: function (b) { for (var a = b.length, g = [], j = 0; j < a; j += 2) g[j >>> 3] |= parseInt(b.substr(j, 2), 16) << 24 - 4 * (j % 8); return new q.init(g, a / 2) } }, a = v.Latin1 = { stringify: function (b) { var a = b.words; b = b.sigBytes; for (var g = [], j = 0; j < b; j++) g.push(String.fromCharCode(a[j >>> 2] >>> 24 - 8 * (j % 4) & 255)); return g.join("") }, parse: function (b) { for (var a = b.length, g = [], j = 0; j < a; j++) g[j >>> 2] |= (b.charCodeAt(j) & 255) << 24 - 8 * (j % 4); return new q.init(g, a) } }, u = v.Utf8 = { stringify: function (b) { try { return decodeURIComponent(escape(a.stringify(b))) } catch (g) { throw Error("Malformed UTF-8 data"); } }, parse: function (b) { return a.parse(unescape(encodeURIComponent(b))) } },

g = l.BufferedBlockAlgorithm = r.extend({ reset: function () { this._data = new q.init; this._nDataBytes = 0 }, _append: function (b) { "string" == typeof b && (b = u.parse(b)); this._data.concat(b); this._nDataBytes += b.sigBytes }, _process: function (b) { var a = this._data, g = a.words, j = a.sigBytes, k = this.blockSize, m = j / (4 * k), m = b ? s.ceil(m) : s.max((m | 0) - this._minBufferSize, 0); b = m * k; j = s.min(4 * b, j); if (b) { for (var l = 0; l < b; l += k) this._doProcessBlock(g, l); l = g.splice(0, b); a.sigBytes -= j } return new q.init(l, j) }, clone: function () { var b = r.clone.call(this); b._data = this._data.clone(); return b }, _minBufferSize: 0 }); l.Hasher = g.extend({ cfg: r.extend(), init: function (b) { this.cfg = this.cfg.extend(b); this.reset() }, reset: function () { g.reset.call(this); this._doReset() }, update: function (b) { this._append(b); this._process(); return this }, finalize: function (b) { b && this._append(b); return this._doFinalize() }, blockSize: 16, _createHelper: function (b) { return function (a, g) { return (new b.init(g)).finalize(a) } }, _createHmacHelper: function (b) { return function (a, g) { return (new k.HMAC.init(b, g)).finalize(a) } } }); var k = m.algo = {}; return m

}(Math);

(function (s) {

function p(a, k, b, h, l, j, m) { a = a + (k & b | ~k & h) + l + m; return (a << j | a >>> 32 - j) + k } function m(a, k, b, h, l, j, m) { a = a + (k & h | b & ~h) + l + m; return (a << j | a >>> 32 - j) + k } function l(a, k, b, h, l, j, m) { a = a + (k ^ b ^ h) + l + m; return (a << j | a >>> 32 - j) + k } function n(a, k, b, h, l, j, m) { a = a + (b ^ (k | ~h)) + l + m; return (a << j | a >>> 32 - j) + k } for (var r = CryptoJS, q = r.lib, v = q.WordArray, t = q.Hasher, q = r.algo, a = [], u = 0; 64 > u; u++) a[u] = 4294967296 * s.abs(s.sin(u + 1)) | 0; q = q.MD5 = t.extend({

_doReset: function () { this._hash = new v.init([1732584193, 4023233417, 2562383102, 271733878]) }, _doProcessBlock: function (g, k) {

for (var b = 0; 16 > b; b++) { var h = k + b, w = g[h]; g[h] = (w << 8 | w >>> 24) & 16711935 | (w << 24 | w >>> 8) & 4278255360 } var b = this._hash.words, h = g[k + 0], w = g[k + 1], j = g[k + 2], q = g[k + 3], r = g[k + 4], s = g[k + 5], t = g[k + 6], u = g[k + 7], v = g[k + 8], x = g[k + 9], y = g[k + 10], z = g[k + 11], A = g[k + 12], B = g[k + 13], C = g[k + 14], D = g[k + 15], c = b[0], d = b[1], e = b[2], f = b[3], c = p(c, d, e, f, h, 7, a[0]), f = p(f, c, d, e, w, 12, a[1]), e = p(e, f, c, d, j, 17, a[2]), d = p(d, e, f, c, q, 22, a[3]), c = p(c, d, e, f, r, 7, a[4]), f = p(f, c, d, e, s, 12, a[5]), e = p(e, f, c, d, t, 17, a[6]), d = p(d, e, f, c, u, 22, a[7]), c = p(c, d, e, f, v, 7, a[8]), f = p(f, c, d, e, x, 12, a[9]), e = p(e, f, c, d, y, 17, a[10]), d = p(d, e, f, c, z, 22, a[11]), c = p(c, d, e, f, A, 7, a[12]), f = p(f, c, d, e, B, 12, a[13]), e = p(e, f, c, d, C, 17, a[14]), d = p(d, e, f, c, D, 22, a[15]), c = m(c, d, e, f, w, 5, a[16]), f = m(f, c, d, e, t, 9, a[17]), e = m(e, f, c, d, z, 14, a[18]), d = m(d, e, f, c, h, 20, a[19]), c = m(c, d, e, f, s, 5, a[20]), f = m(f, c, d, e, y, 9, a[21]), e = m(e, f, c, d, D, 14, a[22]), d = m(d, e, f, c, r, 20, a[23]), c = m(c, d, e, f, x, 5, a[24]), f = m(f, c, d, e, C, 9, a[25]), e = m(e, f, c, d, q, 14, a[26]), d = m(d, e, f, c, v, 20, a[27]), c = m(c, d, e, f, B, 5, a[28]), f = m(f, c, d, e, j, 9, a[29]), e = m(e, f, c, d, u, 14, a[30]), d = m(d, e, f, c, A, 20, a[31]), c = l(c, d, e, f, s, 4, a[32]), f = l(f, c, d, e, v, 11, a[33]), e = l(e, f, c, d, z, 16, a[34]), d = l(d, e, f, c, C, 23, a[35]), c = l(c, d, e, f, w, 4, a[36]), f = l(f, c, d, e, r, 11, a[37]), e = l(e, f, c, d, u, 16, a[38]), d = l(d, e, f, c, y, 23, a[39]), c = l(c, d, e, f, B, 4, a[40]), f = l(f, c, d, e, h, 11, a[41]), e = l(e, f, c, d, q, 16, a[42]), d = l(d, e, f, c, t, 23, a[43]), c = l(c, d, e, f, x, 4, a[44]), f = l(f, c, d, e, A, 11, a[45]), e = l(e, f, c, d, D, 16, a[46]), d = l(d, e, f, c, j, 23, a[47]), c = n(c, d, e, f, h, 6, a[48]), f = n(f, c, d, e, u, 10, a[49]), e = n(e, f, c, d,

C, 15, a[50]), d = n(d, e, f, c, s, 21, a[51]), c = n(c, d, e, f, A, 6, a[52]), f = n(f, c, d, e, q, 10, a[53]), e = n(e, f, c, d, y, 15, a[54]), d = n(d, e, f, c, w, 21, a[55]), c = n(c, d, e, f, v, 6, a[56]), f = n(f, c, d, e, D, 10, a[57]), e = n(e, f, c, d, t, 15, a[58]), d = n(d, e, f, c, B, 21, a[59]), c = n(c, d, e, f, r, 6, a[60]), f = n(f, c, d, e, z, 10, a[61]), e = n(e, f, c, d, j, 15, a[62]), d = n(d, e, f, c, x, 21, a[63]); b[0] = b[0] + c | 0; b[1] = b[1] + d | 0; b[2] = b[2] + e | 0; b[3] = b[3] + f | 0

}, _doFinalize: function () { var a = this._data, k = a.words, b = 8 * this._nDataBytes, h = 8 * a.sigBytes; k[h >>> 5] |= 128 << 24 - h % 32; var l = s.floor(b / 4294967296); k[(h + 64 >>> 9 << 4) + 15] = (l << 8 | l >>> 24) & 16711935 | (l << 24 | l >>> 8) & 4278255360; k[(h + 64 >>> 9 << 4) + 14] = (b << 8 | b >>> 24) & 16711935 | (b << 24 | b >>> 8) & 4278255360; a.sigBytes = 4 * (k.length + 1); this._process(); a = this._hash; k = a.words; for (b = 0; 4 > b; b++) h = k[b], k[b] = (h << 8 | h >>> 24) & 16711935 | (h << 24 | h >>> 8) & 4278255360; return a }, clone: function () { var a = t.clone.call(this); a._hash = this._hash.clone(); return a }

}); r.MD5 = t._createHelper(q); r.HmacMD5 = t._createHmacHelper(q)

})(Math);

return CryptoJS.MD5(words).toString();

}

// sha1

, sha1: function (words) { //# sha1 哈希算法

var CryptoJS = function (e, m) { var p = {}, j = p.lib = {}, l = function () { }, f = j.Base = { extend: function (a) { l.prototype = this; var c = new l; a && c.mixIn(a); c.hasOwnProperty("init") || (c.init = function () { c.$super.init.apply(this, arguments) }); c.init.prototype = c; c.$super = this; return c }, create: function () { var a = this.extend(); a.init.apply(a, arguments); return a }, init: function () { }, mixIn: function (a) { for (var c in a) a.hasOwnProperty(c) && (this[c] = a[c]); a.hasOwnProperty("toString") && (this.toString = a.toString) }, clone: function () { return this.init.prototype.extend(this) } }, n = j.WordArray = f.extend({ init: function (a, c) { a = this.words = a || []; this.sigBytes = c != m ? c : 4 * a.length }, toString: function (a) { return (a || h).stringify(this) }, concat: function (a) { var c = this.words, q = a.words, d = this.sigBytes; a = a.sigBytes; this.clamp(); if (d % 4) for (var b = 0; b < a; b++) c[d + b >>> 2] |= (q[b >>> 2] >>> 24 - 8 * (b % 4) & 255) << 24 - 8 * ((d + b) % 4); else if (65535 < q.length) for (b = 0; b < a; b += 4) c[d + b >>> 2] = q[b >>> 2]; else c.push.apply(c, q); this.sigBytes += a; return this }, clamp: function () { var a = this.words, c = this.sigBytes; a[c >>> 2] &= 4294967295 << 32 - 8 * (c % 4); a.length = e.ceil(c / 4) }, clone: function () { var a = f.clone.call(this); a.words = this.words.slice(0); return a }, random: function (a) { for (var c = [], b = 0; b < a; b += 4) c.push(4294967296 * e.random() | 0); return new n.init(c, a) } }), b = p.enc = {}, h = b.Hex = { stringify: function (a) { var c = a.words; a = a.sigBytes; for (var b = [], d = 0; d < a; d++) { var f = c[d >>> 2] >>> 24 - 8 * (d % 4) & 255; b.push((f >>> 4).toString(16)); b.push((f & 15).toString(16)) } return b.join("") }, parse: function (a) { for (var c = a.length, b = [], d = 0; d < c; d += 2) b[d >>> 3] |= parseInt(a.substr(d, 2), 16) << 24 - 4 * (d % 8); return new n.init(b, c / 2) } }, g = b.Latin1 = { stringify: function (a) { var c = a.words; a = a.sigBytes; for (var b = [], d = 0; d < a; d++) b.push(String.fromCharCode(c[d >>> 2] >>> 24 - 8 * (d % 4) & 255)); return b.join("") }, parse: function (a) { for (var c = a.length, b = [], d = 0; d < c; d++) b[d >>> 2] |= (a.charCodeAt(d) & 255) << 24 - 8 * (d % 4); return new n.init(b, c) } }, r = b.Utf8 = { stringify: function (a) { try { return decodeURIComponent(escape(g.stringify(a))) } catch (c) { throw Error("Malformed UTF-8 data"); } }, parse: function (a) { return g.parse(unescape(encodeURIComponent(a))) } }, k = j.BufferedBlockAlgorithm = f.extend({ reset: function () { this._data = new n.init; this._nDataBytes = 0 }, _append: function (a) { "string" == typeof a && (a = r.parse(a)); this._data.concat(a); this._nDataBytes += a.sigBytes }, _process: function (a) { var c = this._data, b = c.words, d = c.sigBytes, f = this.blockSize, h = d / (4 * f), h = a ? e.ceil(h) : e.max((h | 0) - this._minBufferSize, 0); a = h * f; d = e.min(4 * a, d); if (a) { for (var g = 0; g < a; g += f) this._doProcessBlock(b, g); g = b.splice(0, a); c.sigBytes -= d } return new n.init(g, d) }, clone: function () { var a = f.clone.call(this); a._data = this._data.clone(); return a }, _minBufferSize: 0 }); j.Hasher = k.extend({ cfg: f.extend(), init: function (a) { this.cfg = this.cfg.extend(a); this.reset() }, reset: function () { k.reset.call(this); this._doReset() }, update: function (a) { this._append(a); this._process(); return this }, finalize: function (a) { a && this._append(a); return this._doFinalize() }, blockSize: 16, _createHelper: function (a) { return function (c, b) { return (new a.init(b)).finalize(c) } }, _createHmacHelper: function (a) { return function (b, f) { return (new s.HMAC.init(a, f)).finalize(b) } } }); var s = p.algo = {}; return p }(Math);

(function () { var e = CryptoJS, m = e.lib, p = m.WordArray, j = m.Hasher, l = [], m = e.algo.SHA1 = j.extend({ _doReset: function () { this._hash = new p.init([1732584193, 4023233417, 2562383102, 271733878, 3285377520]) }, _doProcessBlock: function (f, n) { for (var b = this._hash.words, h = b[0], g = b[1], e = b[2], k = b[3], j = b[4], a = 0; 80 > a; a++) { if (16 > a) l[a] = f[n + a] | 0; else { var c = l[a - 3] ^ l[a - 8] ^ l[a - 14] ^ l[a - 16]; l[a] = c << 1 | c >>> 31 } c = (h << 5 | h >>> 27) + j + l[a]; c = 20 > a ? c + ((g & e | ~g & k) + 1518500249) : 40 > a ? c + ((g ^ e ^ k) + 1859775393) : 60 > a ? c + ((g & e | g & k | e & k) - 1894007588) : c + ((g ^ e ^ k) - 899497514); j = k; k = e; e = g << 30 | g >>> 2; g = h; h = c } b[0] = b[0] + h | 0; b[1] = b[1] + g | 0; b[2] = b[2] + e | 0; b[3] = b[3] + k | 0; b[4] = b[4] + j | 0 }, _doFinalize: function () { var f = this._data, e = f.words, b = 8 * this._nDataBytes, h = 8 * f.sigBytes; e[h >>> 5] |= 128 << 24 - h % 32; e[(h + 64 >>> 9 << 4) + 14] = Math.floor(b / 4294967296); e[(h + 64 >>> 9 << 4) + 15] = b; f.sigBytes = 4 * e.length; this._process(); return this._hash }, clone: function () { var e = j.clone.call(this); e._hash = this._hash.clone(); return e } }); e.SHA1 = j._createHelper(m); e.HmacSHA1 = j._createHmacHelper(m) })();

return CryptoJS.SHA1(words).toString();

}

// time33 哈希

, time33: function (words) { //# time33 哈希算法

words = words || '';

//哈希time33算法

for (var i = 0, len = words.length, hash = 5381; i < len; ++i) {

hash += (hash << 5) + words.charAt(i).charCodeAt();

};

return hash & 0x7fffffff;

}

}

　　7.日期方法集

代碼如下:

pFan.date = {

//返回時間戳

getTimeStamp:function(){

var timestamp=new Date().getTime();

return timestamp.toString();

},

//時間戳轉(zhuǎn)為日期格式

//@nS為時間戳

getLocalTime: function(nS) {

return new Date(parseInt(nS) * 1000).toLocaleString().substr(0,17);

},

//@time , 時間 , 如 new Date('2013/11/10 0:12:12')

//@pre ， 星期的 前綴，如：周 ，星期

//@ nums ，如：一二三四五六日

getWeek: function (time, pre, nums) { //# 獲取星期幾

time = typeof time == 'string' ? this.parse(time) : (time || new Date());

pre = pre || '星期'; //周

nums = nums || '日一二三四五六';

return pre + nums[time.getDay()];

},

//@formatType : YYYY, YY, MM

//@ time : new Date('2013/11/12')

//@weeks : 日一二三四五六

format: function (formatType, time, weeks) { //格式化輸出時間

var pre = '0',

formatType = formatType || 'YYYY-MM-DD',

weeks = weeks || '日一二三四五六',

time = time || new Date();

//格式化時間

return (formatType || '')

.replace(/yyyy|YYYY/g, time.getFullYear())

.replace(/yy|YY/g, Tydic.string.addPre(pre, time.getFullYear() % 100), 2)

.replace(/mm|MM/g, Tydic.string.addPre(pre, time.getMonth() + 1, 2))

.replace(/m|M/g, time.getMonth() + 1)

.replace(/dd|DD/g, Tydic.string.addPre(pre, time.getDate(), 2))

.replace(/d|D/g, time.getDate())

.replace(/hh|HH/g, Tydic.string.addPre(pre, time.getHours(), 2))

.replace(/h|H/g, time.getHours())

.replace(/ii|II/g, Tydic.string.addPre(pre, time.getMinutes(), 2))

.replace(/i|I/g, time.getMinutes())

.replace(/ss|SS/g, Tydic.string.addPre(pre, time.getSeconds(), 2))

.replace(/s|S/g, time.getSeconds())

.replace(/w/g, time.getDay())

.replace(/W/g, weeks[time.getDay()]);

}

}

簡簡單單，pfan！出來混的，一切都是要還的。

以上就是本文關(guān)鍵jQuery和js常用知識點的匯總小結(jié)了，希望大家能夠喜歡。

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