Nodejs String Trim trim( ext )

Method Source Code

String.prototype.trim = function( ext )
{
   var chars = [/*from w  w  w .  j av a 2 s. c om*/
      " ", "\t", "\n", "\r"
   ];
   
   var s = this.copy();
   
   if( arguments.length > 0 ){
      for( var i in ext ){
         chars.push( ext[i] );
      }
   }
   
   while( chars.indexOf( s.charAt( 0 ) ) != -1 ){
      s = s.substring( 1, s.length );
   }
   while( chars.indexOf( s.charAt( s.length-1 ) ) != -1 ){
      s = s.substring( 0, s.length-1 );
   }
   return s;
};

Related

1. trim || (String.prototype.trim()

   String.prototype.trim || (String.prototype.trim = function() {
       var str = this.replace(/^\s\s*/, ''),
           ws = /\s/,
           i = str.length;
       while(ws.test(str.charAt(--i)));
       return str.slice(0, i + 1);
   });
   

2. trim()

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

3. trim( )

   String.prototype.trim = function( )
     return( this.replace(new RegExp("^([\\s]+)|([\\s]+)$", "gm"), "") );
   };
   

4. trim(()

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

5. trim(()

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

6. trim()

   String.prototype.trim = function(){
       return this.replace(/(^[\\s]*)|([\\s]*$)/g, "");
   

7. trim()

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