Nodejs String Trim trim(str)

Method Source Code

// Trim function taken from
// http://blog.stevenlevithan.com/archives/faster-trim-javascript
// Thank you for the quick trim!
String.prototype.trim = function(str) {
   str = str.replace(/^\s+/,'');
   for( var i = str.length - 1 ; i >= 0 ; i--) {
      if(/\S/.test(str.charAt(i))) {
            str = str.substring(0,i+1);//from w  w w. j  a  v a  2 s  .co m
            break;
      }
   }
   return str;
};

Related

1. trim(ch)

   String.prototype.trim = function(ch) {
       var r = new RegExp("^{0}+|{0}+$".format(ch || "\\s"), "g");
       return this.replace(r, "");
   };
   

2. trim(character)

   String.prototype.trim = function (character) {
     return this.trimLeft(character).trimRight(character);
   };
   

3. trim(charlist)

   'use strict';
   String.prototype.trim = function (charlist) {
     return this.ltrim(charlist).rtrim(charlist);
   };
   

4. trim(chars)

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

5. trim(fag='default')

   String.prototype.trim = function (fag='default'){
     const preg_arr = {'default':/(^\s*)|(\s*$)/,'left':/(^\s*)/,'right':/(\s*$)/};
     switch(fag){
       case 'left':
         return this.replace(preg_arr.left,'');
       break;
       case 'right':
         return this.replace(preg_arr.right,'');
       break;
   ...
   

6. trim(str)

   var trim = function (str) {
       return str.replace(/\s*/g, "");
   };
   

7. trim(ws)

   String.prototype.trim = function (ws)
       if(!this.length) return "";
       var tmp = this.stripNL().ltrim().rtrim();
       if(ws) return tmp.replace(/ +/g, ' ');
       else return tmp;
   String.prototype.rtrim = function ()
       if(!this.length) return "";
       return this.replace(/\s+$/g, '');
   String.prototype.ltrim = function ()
       if(!this.length) return "";
       return this.replace(/^\s+/g, '');
   String.prototype.stripNL = function ()
       if(!this.length) return "";
       return this.replace(/[\n\r]/g, '');
   

8. trim2()

   String.prototype.trim2 = function() {
     return this.replace(/^\s+|\s+$/g, '');
   };
   String.prototype.trim = function() {
     return this.replace(/^\s+/, '').replace(/\s+$/, '');
   };
   'foo     '.trim(); 
   '     foo'.trim(); 
   '  foo   '.trim(); 
   ...
   

9. trimBoth(s)

   String.prototype.trimBoth = function(s) {
       return this.replace(new RegExp("^" + s + "+|" + s + "+$", "gm"), "");