Nodejs Number Format Pad zfill(length)

Method Source Code

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
    }//from   www.jav  a  2s  . co  m

    return str;
};

Related

1. leftZeroFill(number, targetLength)

   function leftZeroFill(number, targetLength) {
       var output = number + '';
       while (output.length < targetLength) {
           output = '0' + output;
       return output;
   

2. 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;
   };
   ...
   

3. 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;
   };
   ...
   

4. 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;
   };
   ...
   

5. zf(len)

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

6. zfill(n)

   Number.prototype.zfill = function (n) {
       var str = String(this);
       while (str.length < n) {
           str = "0" + str;
       return str;
   };