Nodejs String Padding Left lpad(character, count)

Method Source Code

/**//from   ww w  .j a  v  a 2 s. com
 * Left pad
 *   ie.   "k".lpad("o",5)  --> "ooook"
 * @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;
}


var iterate = function(collection, iterator) {
    for (var i=0; i<collection.length; i++) {
        iterator(collection[i]);
    }
}

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;
   

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;