Nodejs String Trim Left lTrim()

Method Source Code

String.prototype.lTrim = function () {
   var $whitespace = new String(" \t\n\r");
   if ($whitespace.indexOf(this.charAt(0)) != -1) {
      var $i = this.length;
      var $j = 0;
      while ($j < $i && $whitespace.indexOf(this.charAt($j)) != -1) {
         $j++;/* w w w . j a  v  a2  s  .  co m*/
      }
      return this.substring($j, $i);
   }
   return new String(this);
};

Related

1. trimLeft(character)

   String.prototype.trimLeft = function (character) {
     character = character || ' ';
     return this.replace(new RegExp('^[' + character + ']+'), "");
   };
   

2. trimLeft(charlist = '\s')

   String.prototype.trimLeft = function(charlist = '\s') {
       return this.replace(new RegExp('^[' + charlist + ']+'), '');
   };
   

3. lTrim()

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

4. lTrim()

   String.prototype.lTrim = function(){
     str = this;
      var i;
       for(i=0;i<str.length;i++)
           if(str.charAt(i)!=" "&&str.charAt(i)!=" ")break;
       str=str.substring(i,str.length);
       return str;
   ...
   

5. lTrim()

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

6. lTrim(charlist)

   String.prototype.lTrim = function(charlist) {
     if (charlist === undefined)
       charlist = "\s";
     return this.replace(new RegExp("^[" + charlist + "]+"), "");
   };
   

7. leftTrim()

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

8. leftTrim()

   String.prototype.leftTrim = function() { 
      return this.replace(/(^\s*)/g, ""); 
   

9. leftTrim()

   String.prototype.leftTrim =function(){
       return this.replace(/^\s+/,'');