文章转自:http://www.cnblogs.com/zfc2201/archive/2012/12/16/2820335.html
JS String类拓展方法:
//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++)
tmpArr.push(this);
return tmpArr.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;
}
应用实例:
//页面显示
String.prototype.filterSpetialChar = function () { return this.replace('<', '<').replace('>', '>').replace('&', '&').replace('"', '"').replace('\'', ''');
}
引用:
"fnCreatedCell": function (nTd, sData, oData) {
$(nTd).html('<span class=actionLink onclick=skipPage("codetscount","' + oData.GName.filterSpetialChar() + '","' + oData.GModel + '")>' + oData.CodeTsCount + '</span>');
}