web前端|js教程
js_array扩展,js_string扩展
web前端-js教程
废话不多说了，直接给大家上array对象扩展代码了，具体代码如下所示：
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/*** Created by laixiangran on /01/07.* Array扩展*/(function() {// 遍历数组if (typeof Array.prototype.forEach != "function") {Array.prototype.forEach = function (fn, context) {for (var i = 0; i < this.length; i++) {if (typeof fn === "function" && Object.prototype.hasOwnProperty.call(this, i)) {fn.call(context, this[i], i, this);}}};}// 让数组中的每一个元素调用给定的函数，然后把得到的结果放到新数组中返回if (typeof Array.prototype.map != "function") {Array.prototype.map = function (fn, context) {var arr = [];if (typeof fn === "function") {for (var k = 0, length = this.length; k < length; k++) {arr.push(fn.call(context, this[k], k, this));}}return arr;};}// 把符合条件的元素放到一个新数组中返回if (typeof Array.prototype.filter != "function") {Array.prototype.filter = function (fn, context) {var arr = [];if (typeof fn === "function") {for (var k = 0, length = this.length; k < length; k++) {fn.call(context, this[k], k, this) && arr.push(this[k]);}}return arr;};}// 如果数组中的每个元素都能通过给定的函数的测试，则返回true，反之falseif (typeof Array.prototype.every != "function") {Array.prototype.every = function (fn, context) {var passed = true;if (typeof fn === "function") {for (var k = 0, length = this.length; k < length; k++) {if (passed === false) break;passed = !!fn.call(context, this[k], k, this);}}return passed;};}// 类似every函数，但只要有一个通过给定函数的测试就返回trueif (typeof Array.prototype.some != "function") {Array.prototype.some = function (fn, context) {var passed = false;if (typeof fn === "function") {for (var k = 0, length = this.length; k < length; k++) {if (passed === true) break;passed = !!fn.call(context, this[k], k, this);}}return passed;};}// 返回元素在数组的索引，没有则返回-1，从左到右if (typeof Array.prototype.indexOf != "function") {Array.prototype.indexOf = function (item, index) {var n = this.length,i = index == null ? 0 : index < 0 ? Math.max(0, n + index) : index;for (; i < n; i++) {if (i in this && this[i] === item) {return i}}return -1};}// 返回元素在数组的索引，没有则返回-1，从右到左if (typeof Array.prototype.lastIndexOf != "function") {Array.prototype.lastIndexOf = function (item, index) {var n = this.length,i = index == null ? n-1 : index = 0; i--) {if (i in this && this[i] === item) {return i;}}return -1;};}// 让数组元素依次调用给定函数，最后返回一个值（从左到右）if (typeof Array.prototype.reduce != "function") {Array.prototype.reduce = function (callback, initialValue) {var previous = initialValue, k = 0, length = this.length;if (typeof initialValue === "undefined") {previous = this[0];k = 1;}if (typeof callback === "function") {for (k; k -1; k-=1) {this.hasOwnProperty(k) && (previous = callback(previous, this[k], k, this));}}return previous;};}// 去掉重复项（唯一性），返回新数组if (typeof Array.prototype.uniq != "function") {Array.prototype.uniq = function() {var arr = [];arr[0] = this[0];for (var i = 1; i = 0; i--) {if (item === this[i]) {this.splice(i, 1);}}return this;};}// 打乱数组顺序if (typeof Array.prototype.shuffle != "function") {Array.prototype.shuffle = function() {var i = this.length;while (i) {var j = Math.floor(Math.random()*i);var t = this[--i];this[i] = this[j];this[j] = t;}return this;};}// 求数组的最大值if (typeof Array.prototype.max != "function") {Array.prototype.max = function() {return Math.max.apply({}, this)};}// 求数组的最小值if (typeof Array.prototype.max != "function") {Array.prototype.min = function() {return Math.min.apply({}, this)};} // 判断是否为数组if (typeof Array.prototype.isArray != "function") {Array.prototype.isArray = function() {return Object.prototype.toString.apply(this) === "[object Array]";};} }());
下面是string对象扩展代码如下所示：
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/**
* Created by laixiangran on /12/12.
* String扩展
*/
(function() {
// 十六进制颜色值的正则表达式
var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;
// RGB颜色转换为16进制
if (typeof String.prototype.rgbToHex != "function") {
String.prototype.rgbToHex = function() {
var that = this;
if (/^(rgb|RGB)/.test(that)) {
var aColor = that.replace(/(?:\(|\)|rgb|RGB)*/g,"").split(",");
var strHex = "#";
for (var i=0; i
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