Nodejs Number Format format(fmt)

Method Source Code

Number.prototype.format = function (fmt) {

    var s = this.toFixed(2).toString();

    var decimals = "";
    if (s.indexOf(".") > 0) {
        var arr = s.split('.');
        s = arr[0]; decimals = arr[1];//from   www. j av  a 2  s . co  m
    }

    if (this > 0 && this < 1000) {
        if (decimals != "" && parseInt(decimals) != 0) {
            return s + "." + decimals;
        }
        return s;
    }

    while (s.length % 3 != 0) {
        s = '0' + s;
    }

    var str = [], _s = s.split('');
    k = 0;
    for (var i = 0; i < _s.length; i++) {
        var a = _s[i];
        k++;
        str.push(a);
        if (k % 3 == 0) {
            str.push(",");
            k = 0;
        }
    }

    str.length = str.length - 1;

    var _formatted = str.join('').replace(/^0+/, '');
    if (decimals.length > 0
             && parseInt(decimals) != 0) {
        _formatted += '.' + decimals;
    }

    return _formatted.length == 0 ? '0' : _formatted;

};

Related

1. commafy()

   Number.prototype.commafy = function () {
     return String(this).commafy();
   String.prototype.commafy = function () {
     return this.replace(/(^|[^\w.])(\d{4,})/g, function($0, $1, $2) {
       return $1 + $2.replace(/\d(?=(?:\d\d\d)+(?!\d))/g, "$&,");
     });
   

2. format()

   Number.prototype.format = function () {
     var str = this.toString();
     var Re = /[^0-9]/g;
     var ReN = /(-?[0-9]+)([0-9]{3})/;
     str = str.replace(Re,'');              
     while (ReN.test(str)) { 
       str = str.replace(ReN, "$1,$2"); 
     return str;
   ...
   

3. format()

   Number.prototype.format = function() {
     var n = this, decPlaces = 2, decSeparator = ".", thouSeparator = ",", sign = n < 0 ? "-" : "", i = parseInt( n = Math.abs(+n || 0).toFixed(decPlaces)) + "", j = ( j = i.length) > 3 ? j % 3 : 0;
     return sign + ( j ? i.substr(0, j) + thouSeparator : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + thouSeparator) + ( decPlaces ? decSeparator + Math.abs(n - i).toFixed(decPlaces).slice(2) : "");
   };
   function isNumber(n) {
     return !isNaN(parseFloat(n)) && isFinite(n);
   var dayNames = new Array("Duminica", "Luni", "Marti", "Miercuri", "Joi", "Vineri", "Sambata");
   var monthNames = new Array("Ianuarie", "Februarie", "Martie", "Aprilie", "Mai", "Iunie", "Iulie", "August", "Septembrie", "Octobmrie", "Noiembrie", "Decembrie");
   ...
   

4. format(decimalPoints,thousandsSep,decimalSep)

   Number.prototype.format=function(decimalPoints,thousandsSep,decimalSep){
     var val=this+'',re=/^(-?)(\d+)/,x,y;
     if (decimalPoints!=null) val = this.toFixed(decimalPoints);
     if (thousandsSep && (x=re.exec(val))){
       for (var a=x[2].split(''),i=a.length-3;i>0;i-=3) a.splice(i,0,thousandsSep);
       val=val.replace(re,x[1]+a.join(''));
     if (decimalSep) val=val.replace(/\./,decimalSep);
     return val;
   ...
   

5. format(digit, separator)

   Number.prototype.format = function(digit, separator)
       if (typeof digit != 'number' || digit > 99) 
           throw new Error('Number.toFormattedString - Wrong argument.');
       var decimals = Math.round(((this - Math.floor(this)) * Math.pow(10, digit))).toString();
       while (digit - decimals.length > 0) 
           decimals = '0' + decimals;
       if (typeof separator != 'string' || separator.length != 1) 
           separator = '.';
       return Math.floor(this).toString() + separator + decimals.substr(0, digit);
   };
   

6. format(k, fixLength)

   Number.decPoint = ',';
   Number.thousand_sep = '.';
   Number.prototype.format = function (k, fixLength) {
       if (!k) k = 0;
       var neu = '';
       var sign = this < 0 ? '-' : '';
       var f = Math.pow(10, k);
       var zahl = Math.abs(this);
       zahl = '' + parseInt(zahl * f + .5) / f;
   ...
   

7. format(n, x)

   Number.prototype.format = function(n, x) {
     var re = '\\d(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\.' : '$') + ')';
     return this.toFixed(Math.max(0, ~~n)).replace(new RegExp(re, 'g'), '$&,');
   };
   

8. format(n, x)

   Number.prototype.format = function(n, x) {
       var re = '(\\d)(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\.' : '$') + ')';
       return this.toFixed(Math.max(0, ~~n)).replace(new RegExp(re, 'g'), '$1,');
   };
   

9. format(n, x)

   Number.prototype.format = function (n, x) {
       var re = '\\d(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\.' : '$') + ')';
       return this.toFixed(Math.max(0, ~~n));
   };