扩展原生js的Array类
1 Array.prototype.add = function(item){ 2 this.push(item); 3 } 4 Array.prototype.addRange = function(items){ 5 var length = items.length; 6 if(length!=0){ 7 for (var index = 0; index < length; index++) { 8 this.push(items[index]); 9 10 } 11 } 12 } 13 Array.prototype.clear = function(){ 14 if(this.length>0){ 15 this.splice(0,this.length); 16 } 17 } 18 Array.prototype.isEmpty = function(){ 19 if(this.length == 0){ 20 return true; 21 } 22 else{ 23 return false; 24 } 25 } 26 Array.prototype.clone = function(){ 27 var clonedArray = []; 28 var length = this.length; 29 for (var index = 0; index < length; index++) { 30 clonedArray[index] = this[index]; 31 } 32 return clonedArray; 33 } 34 Array.prototype.contains = function(item){ 35 var index = this.indexOf(item); 36 return (index>=0); 37 } 38 Array.prototype.dequeue = function(){ 39 return this.shift(); 40 } 41 Array.prototype.indexOf = function(item){ 42 var length = this.length; 43 44 if(length!=0){ 45 for (var index = 0; index < length; index++) { 46 if(this[index] == item){ 47 return index; 48 } 49 } 50 } 51 return -1; 52 } 53 Array.prototype.insert = function(index,item){ 54 this.splice(index,0,item); 55 } 56 Array.prototype.joinstr = function(str){ 57 var newStr = new Array(this.length); 58 for (var i = 0; i < this.length; i++) { 59 newStr[i] = this[i]+str; 60 } 61 return newStr; 62 } 63 Array.prototype.queue = function(item){//入队 64 this.push(item); 65 } 66 Array.prototype.remove = function(item){ 67 var index = this.indexOf(item); 68 if(index >= 0){ 69 this.splice(index,1); 70 } 71 } 72 Array.prototype.removeAt = function(index){ 73 this.splice(index,1); 74 } 75 //给js原生Array增加each方法 76 Array.prototype.each = function(fn) 77 { 78 return this.length ? [fn(this.slice(0,1))].concat(this.slice(1).each(fn)) : []; 79 }; 80 81 [1,2,3,4].each(function(x){ 82 document.write(x + "<br/>"); 83 });
原生js的String类扩展
//获取字符数组 String.prototype.toCharArray = function(){ return this.split(""); } //获取N个相同的字符串 String.prototype.repeat = function(num){ var tmpArr = []; for (var i = 0; i < num; i++) { temArr.push(this); return temArr.join(""); } } //逆序 String.prototype.reverse = function(){ return this.split("").reverse().join(""); } //测试是否是数字 String.prototype.isNumeric = function() { var tmpFloat = parseFloat(this); if (isNaN(tmpFloat)) return false; var tmpLen = this.length - tmpFloat.toString().length; return tmpFloat + "0".Repeat(tmpLen) == this; } //测试是否是整数 String.prototype.isInt = function() { if (this == "NaN") return false; return this == parseInt(this).toString(); } // 合并多个空白为一个空白 String.prototype.resetBlank = function() { return this.replace(/s+/g, " "); } // 除去左边空白 String.prototype.LTrim = function() { return this.replace(/^s+/g, ""); } // 除去右边空白 String.prototype.RTrim = function() { return this.replace(/s+$/g, ""); } // 除去两边空白 String.prototype.trim = function() { return this.replace(/(^s+)|(s+$)/g, ""); } // 保留数字 String.prototype.getNum = function() { return this.replace(/[^d]/g, ""); } // 保留字母 String.prototype.getEn = function() { return this.replace(/[^A-Za-z]/g, ""); } // 保留中文 String.prototype.getCn = function() { return this.replace(/[^u4e00-u9fa5uf900-ufa2d]/g, ""); } // 得到字节长度 String.prototype.getRealLength = function() { return this.replace(/[^x00-xff]/g, "--").length; } // 从左截取指定长度的字串 String.prototype.left = function(n) { return this.slice(0, n); } // 从右截取指定长度的字串 String.prototype.right = function(n) { return this.slice(this.length - n); } // HTML编码 String.prototype.HTMLEncode = function() { var re = this; var q1 = [ /x26/g, /x3C/g, /x3E/g, /x20/g ]; var q2 = [ "&", "<", ">", " " ]; for ( var i = 0; i < q1.length; i++) re = re.replace(q1[i], q2[i]); return re; } // Unicode转化 String.prototype.ascW = function() { var strText = ""; for ( var i = 0; i < this.length; i++) strText += "&#" + this.charCodeAt(i) + ";"; return strText; }
时间: 2024-10-23 10:21:54