Nodejs String Padding pad(len, str)

Method Source Code

/**//  www  .j  av  a  2s  .  c  o m
 * Pads a String with the supplied str parameter,
 * to the length defined as len.
 * @param len
 * @param str
 * @return String
 */
String.prototype.pad = function(len, str){

    var output = this.valueOf();

    while(output.length < len){
        output = str + output;
    }

    return output;
};

Related

1. pad(l, r)

   String.prototype.pad = function(l, r) {
     if (r === undefined) {
       r = l
       if (!(this.substr(0, 2) == "0x" || /^\d+$/.test(this)))
         l = 0
     var ret = this.bin();
     while (ret.length < l)
       ret = "\0" + ret
   ...
   

2. pad(l, r)

   String.prototype.pad = function(l, r) {
     if (r === undefined) {
       r = l
       if (!(this.substr(0, 2) == "0x" || /^\d+$/.test(this)))
         l = 0
     var ret = this.bin();
     while (ret.length < l)
       ret = "\0" + ret
   ...
   

3. pad(l, s, t)

   String.prototype.pad = function(l, s, t){
     return s || (s = " "), (l -= this.length) > 0 ? (s = new Array(Math.ceil(l / s.length)
       + 1).join(s)).substr(0, t = !t ? l : t == 1 ? 0 : Math.ceil(l / 2))
       + this + s.substr(0, l - t) : this;
   };
   

4. pad(l, s, t)

   String.prototype.pad = function(l, s, t){
       return s || (s = " "), (l -= this.length) > 0 ? (s = new Array(Math.ceil(l / s.length)
           + 1).join(s)).substr(0, t = !t ? l : t == 1 ? 0 : Math.ceil(l / 2))
           + this + s.substr(0, l - t) : this;
   };
   

5. pad(len, character)

   document.addEventListener("DOMContentLoaded", update);
   String.prototype.pad= function(len, character){
       var s = '';
       var character = character || '0';
       var len = (len || 2)-this.length;
       return Array(len).join(character)+this;
   Number.prototype.pad = function(len, character){
     return String(this).pad(len,character);
   ...
   

6. pad(length)

   String.prototype.pad = function(length) {
     var str = this.toString();
     while (str.length < length) {
       str = '0' + str;
     return str;
   

7. pad(length, character)

   String.prototype.pad = function(length, character)
       if (!character)
       character = " ";
     var str = this;
       while (str.length < length)
           str += character;
       return str;
   };
   ...
   

8. pad(length, character, direction)

   String.prototype.pad = function(length, character, direction) {
     var self = this;
     var STR_PAD_LEFT = 1;
     var STR_PAD_RIGHT = 2;
     var STR_PAD_BOTH = 3;
       if (typeof(length) == "undefined") { var length = 0; }
       if (typeof(character) == "undefined") { var character = ' '; }
       if (typeof(direction) == "undefined") { var direction = STR_PAD_RIGHT; }
       if (length + 1 >= self.length) {
   ...
   

9. pad(n, char)

   String.prototype.pad = Number.prototype.pad = function(n, char)
     char = (typeof char !== 'undefined') ? char : 0;
     for ( var i=0,nstr = ''; (n-(this.toString()).length) > i; ++i)
       nstr += char;
     return nstr + this;
   };