cbertelegni/README.md

## README.md

      
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              README.md
            
          
    Extensión de la clase Number para dar formato a los números en Javascript.

Forma de uso:

var n = 15425.56;
var output = n.format(2, ",", ".");
alert(output); // el resultado es "15.425,56"

  
## format_number.js
Number.prototype.format = function(c, d, t){
    var n = this;
    c = isNaN(c = Math.abs(c)) ? 2 : c;
    d = d === undefined ? "." : d;
    t = t === undefined ? "," : t;
    var s = n < 0 ? "-" : "",
    i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "",
    j = (j = i.length) > 3 ? j % 3 : 0;
    var nn = s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
    return nn;
};

## index.html
<html>
<head>
  <title>Ejemplo de formato de números</title>
  <script type="text/javascript" src="format_number.js"></script>
</head>
<body>
<script type="text/javascript">
  var n = 15425.56;
  var output = n.format(2, ",", ".");
  var output_2 = n.format(n % 1 === 0 ? null : 2, ",", ".");
  var output_3 = n.format(0, ",", ".");
  alert(output);    // "15.425,56"
  alert(output_2);    // "15.425,56"
  alert(output_3);  // "15.425"
</script>
</body>
</html>
	Number.prototype.format = function(c, d, t){
	var n = this;
	c = isNaN(c = Math.abs(c)) ? 2 : c;
	d = d === undefined ? "." : d;
	t = t === undefined ? "," : t;
	var s = n < 0 ? "-" : "",
	i = parseInt(n = Math.abs(+n \|\| 0).toFixed(c)) + "",
	j = (j = i.length) > 3 ? j % 3 : 0;
	var nn = s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
	return nn;
	};
	<html>
	<head>
	<title>Ejemplo de formato de números</title>
	<script type="text/javascript" src="format_number.js"></script>
	</head>
	<body>
	<script type="text/javascript">
	var n = 15425.56;
	var output = n.format(2, ",", ".");
	var output_2 = n.format(n % 1 === 0 ? null : 2, ",", ".");
	var output_3 = n.format(0, ",", ".");
	alert(output); // "15.425,56"
	alert(output_2); // "15.425,56"
	alert(output_3); // "15.425"
	</script>
	</body>
	</html>