Nodejs Number Format Pad zfill(n)

Method Source Code

Number.prototype.zfill = function (n) {
    var str = String(this);
    while (str.length < n) {
        str = "0" + str;
    }/*from   ww  w. j  a va  2s.co m*/
    return str;
};

Related

1. leftZeroPad(numZeros)

   Number.prototype.leftZeroPad = function(numZeros) {
           var n = Math.abs(this);
           var zeros = Math.max(0, numZeros - Math.floor(n).toString().length );
           var zeroString = Math.pow(10,zeros).toString().substr(1);
           if( this < 0 ) {
                   zeroString = '-' + zeroString;
           return zeroString+n;
   };
   ...
   

2. zeroPad(len)

   Number.prototype.zeroPad = function (len) {
     var s = String(this);
     var c = '0';
     len = len || 2;
     while (s.length < len) {
       s = c + s;
     return s;
   };
   ...
   

3. zeropad(n)

   Number.prototype.zeropad = function(n) {
      var str = "" + this;
      var len = n - str.length;
      var pad = "";
      while (len-- > 0) {
         pad += "0";
      return pad + str;
   };
   ...
   

4. zf(len)

   Number.prototype.zf = function(len){
       if(isNaN(len)) len = 2;
       return (this + '').pad(len, '0');
   };
   

5. zfill(length)

   Number.prototype.zfill = function(length) { 
       var str = this.toString();
       if (str.length < length) {
           for(var i = 0; i < length - str.length; i++) str = '0' + str
       return str;
   };