Nodejs Utililty Methods Number Format Pad

Number.prototype.padLeft = function(max, c) {
  return this.toString().padLeft(max, c || '0');
};

Number.prototype.padLeft = function(n, str) {
    return Array(n-String(this).length+1).join(str||'0')+this;
};

Number.prototype.padRight = function(max, c) {
  return this.toString().padRight(max, c || '0');
};

Number.prototype.padWithDigits = function (n) {  
  var txt = this.toString();
  while(txt.length < n) {
    txt = '0' + txt;
  return txt;  
};

Number.prototype.padZeros = function(n){
  return this.toString().padZeros(n);
};

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

Number.prototype.LenWithZero = function(oCount) {
    var strText = this.toString();
    while (strText.length < oCount) {
        strText = '0' + strText;
    return strText;
};

Number.prototype.leadingZero = function(length) {
    return ('0'+this).slice(-length);

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

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;
};
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