Nodejs String Trim trim()

Method Source Code

String.prototype.trim = function(){
   var whitespace   = " \n\r\t\f\x0b\xa0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000";
   var l         = 0;
   var i         = 0;
   var str         = this + '';
   l = str.length;/*from  w w w  .j ava  2s . com*/
   for(i = 0; i < l; i++){
      if(whitespace.indexOf(str.charAt(i)) === -1){
         str = str.substring(i);
         break;
      }
   }
   l = str.length;
   for(i = l - 1; i >= 0; i--){
      if (whitespace.indexOf(str.charAt(i)) === -1) {
         str = str.substring(0, i + 1);
         break;
      }
   }
   return whitespace.indexOf(str.charAt(0)) === -1 ? str : '';
}

Related

1. trim()

   exports.version = '0.0.1';
   String.prototype.trim = function() { 
     return this.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
   

2. trim()

   String.prototype.trim = function () {
     return this.replace(/^ +/, '').replace(/ +$/, '');
   };
   

3. trim()

   String.prototype.trim = function() {
     return this.replace(/^\s+/, "").replace(/\s+$/, "");
   };
   

4. trim()

   String.prototype.trim = function() {
       "use strict";
       return this.replace(/^\s+|\s+$/g,"");
   };
   

5. trim()

   String.prototype.trim = function() {
     var str = this.replace(/^\s+/, '');
     for (var i = str.length - 1; i >= 0; i--) {
       if (/\S/.test(str.charAt(i))) {
         str = str.substring(0, i + 1);
         break;
     return str;
   ...
   

6. trim()

   String.prototype.trim = function() {
       return this.replace(/^\s+/g,"").replace(/\s+$/g,"");
   };
   

7. trim(c)

   String.prototype.trim = function (c) {
       if (c) {
           var r = new RegExp('(^' + c + ')|(' + c + '$)', 'g');
           return this.replace(r, '');
       } else {
           return this.replace(/^\s+|\s+$/g,'');
   };
   String.prototype.capitalize = function() {
   ...
   

8. trim(c, t)

   String.prototype.trim = function(c, t){
     return c = "[" + (c == undefined ? " " : c.replace(/([\^\]\\-])/g, "\\\$1")) + "]+",
     this.replace(new RegExp((t != 2 ? "^" : "") + c + (t != 1 ? "|" + c + "$" : ""), "g"), "");
   };
   

9. trim(c, t)

   String.prototype.trim = function(c, t){
     return c = "[" + (c == undefined ? " " : c.replace(/([\^\]\\-])/g, "\\\$1")) + "]+",
     this.replace(new RegExp((t != 2 ? "^" : "") + c + (t != 1 ? "|" + c + "$" : ""), "g"), "");
   };