Nodejs String Padding Left lpad(character, count)

Method Source Code

/** /*from   w w w . ja  v  a  2 s.c  o  m*/
 * Left pad
 * @param {string} [character="0"]
 * @param {int} [count=2]
 */
String.prototype.lpad = function(character, count) {
   var ch = character || "0";
   var cnt = count || 2;

   var s = "";
   while (s.length < (cnt - this.length)) { s += ch; }
   s = s.substring(0, cnt-this.length);
   return s+this;
}

Related

1. lpad(character, count)

   String.prototype.lpad = function(character, count) {
       var ch = character || "0";
       var cnt = count || 2;
       var s = "";
       while (s.length < (cnt - this.length)) { s += ch; }
       s = s.substring(0, cnt-this.length);
       return s+this;
   var iterate = function(collection, iterator) {
   ...
   

2. lpad(count, pad)

   String.prototype.lpad = function(count, pad) {
     pad = pad || '0';
     str = this + '';
     return str.length >= count ? str : new Array(count - str.length + 1).join(pad) + str;    
   };
   String.prototype.rpad = function(count, pad) {
     pad = pad || '0';
     str = this + '';
     return str.length >= count ? str : str + new Array(count - str.length + 1).join(pad);    
   ...
   

3. lpad(count, pad)

   String.prototype.lpad = function(count, pad) {
       pad = pad || '0';
       str = this + '';
       return str.length >= count ? str : new Array(count - str.length + 1).join(pad) + str;
   };
   

4. lpad(l)

   String.prototype.lpad = function(l) {
     var s = this;
     while (s.length < l) { s = "0"+s; }
     return s;
   

5. lpad(len, padstr)

   String.prototype.lpad = function(len, padstr) {
     return Array(len + 1 - this.length).join(padstr) + this;
   };
   String.prototype.rpad = function(len, padstr) {
     return this + Array(len + 1 - this.length).join(padstr);
   };