string.extensions.min.js

/*
 * StringExtensions
 * http://www.karalamalar.net/
 *
 * Copyright (c) 2009-2013 İzzet Emre Erkan
 * Licensed under Creative Commons Attribution-Share Alike 3.0 Unported License
 * http://creativecommons.org/licenses/by-sa/3.0/
 */
String.prototype.trimLeft=function(c){c=c||' ';return this.replace(new RegExp('^['+c+']+'),"")};String.prototype.trimRight=function(c){c=c||' ';return this.replace(new RegExp('['+c+']+$'),"")};String.prototype.trim=function(c){return this.trimLeft(c).trimRight(c)};String.prototype.padLeft=function(l,c){var s=this.toString();c=c||' ';while(s.length<l){s=c+s}return s};String.prototype.padRight=function(l,c){var s=this.toString();c=c||' ';while(s.length<l){s=s+c}return s};String.prototype.insert=function(p,c){var s=this.toString();return s.substring(0,p)+c+s.substring(p)};String.prototype.startsWith=function(s){return this.match('^'+s)===s};String.prototype.endsWith=function(s){return this.match(s+'$')===s};String.prototype.isNullOrEmpty=function(){return this===null||this.length===0};String.prototype.isNullOrWhitespace=function(){return this===null||this.replace(/\s/g,'').length===0};String.prototype.append=function(s,c){var t=this.toString();c=c||1;while(0<c){t=t+s;c--}return t};String.prototype.appendTo=function(s,c){var t=this.toString();return s.append(t,c)};String.prototype.prepend=function(s,c){var t=this.toString();c=c||1;while(0<c){t=s+t;c--}return t};String.prototype.prependTo=function(s,c){var t=this.toString();return s.prepend(t,c)};String.prototype.valiDate=function(){if(/^(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[-/.](19|20)[0-9]{2}$/.test(this)){var v=this.replace(/[- /]/g,'.').split('.'),d=parseInt(v[0],10),m=parseInt(v[1],10),y=parseInt(v[2],10),o=new Date(y,m-1,d);return o.getDate()===d&&o.getMonth()+1===m&&o.getFullYear()===y?o:false}else{return false}};// More info about valiDate: https://github.com/karalamalar/valiDate