UPDATE 8/15/2008 - For JavaScript - use '$'+(parseFloat('123.2')||0).toFixed(2) instead. I’ve been using this as of late and forgot to update this post a while ago.
UPDATE 2/18/2008 - Now works with negative values and properly formats ‘-.006′ as ‘-$0.01′ with cent rounding via Math.round() at precision level 2.
A quick function that was put together to parse strings/numbers (float as well) into a US Dollar formatted string. Case in point - we want the number 10000 to actually be turned into a string such as “$10,000.00″. This is a common function found in ColdFusion, PHP and the like. The function as follows is not anywhere as robust as it is in other languages - but it’s a good start for our entirely USD-based e-commerce applicaitons.
Flash version:
function dollarFormat (origNumber):String {
var procNum:Number = 0;
if (typeof origNumber == "string")
procNum = parseFloat(origNumber);
else if (typeof origNumber == "number")
procNum = origNumber;
else
return "";
var isNegative:Boolean = (procNum < 0) ? true : false;
procNum = Math.abs(procNum);
var numStr:String = (Math.round(procNum * 100)).toString();
if (numStr.length == 0 || numStr == "0") {
return ((isNegative) ? "-" : "") + "$0.00";
} else if (numStr.length == 1) {
return ((isNegative) ? "-" : "") + "$0.0" + numStr;
} else if (numStr.length == 2) {
return ((isNegative) ? "-" : "") + "$0." + numStr;
} else {
var dollarStr:String = numStr.substring(0, (numStr.length - 2));
var centStr:String = numStr.slice(-2);
var dollarOutStr:String = "";
for (var charItr = dollarStr.length; charItr >= 0; charItr--) {
dollarOutStr = ((((dollarStr.length - charItr) % 3) == 0 && dollarStr.length != charItr && charItr != 0) ? "," : "") + dollarStr.charAt(charItr) + dollarOutStr;
}
return ((isNegative) ? "-" : "") + "$" + dollarOutStr + "." + centStr;
}
}
Download this code: dollarFormat-snippet
this can be simply called in an external .as file to be used as an #include or as a static function in an imported actionscript class.
JavaScript version:
function dollarFormat (origNumber) {
var procNum = 0;
if (typeof(origNumber) == 'string')
procNum = parseFloat(origNumber);
else if (typeof(origNumber) == 'number')
procNum = origNumber;
else
return '';
var isNegative = (procNum < 0) ? true : false;
procNum = Math.abs(procNum);
var numStr = (Math.round(procNum * 100)).toString();
if (numStr.length == 0 || numStr == '0') {
return ((isNegative) ? '-' : '') + '$0.00';
} else if (numStr.length == 1) {
return ((isNegative) ? '-' : '') + '$0.0' + numStr;
} else if (numStr.length == 2) {
return ((isNegative) ? '-' : '') + '$0.' + numStr;
} else {
var dollarStr = numStr.substring(0, (numStr.length - 2));
var centStr = numStr.slice(-2);
var dollarOutStr = '';
for (var charItr = dollarStr.length; charItr >= 0; charItr--) {
dollarOutStr = ((((dollarStr.length - charItr) % 3) == 0 && dollarStr.length != charItr && charItr != 0) ? "," : "") + dollarStr.charAt(charItr) + dollarOutStr;
}
return ((isNegative) ? '-' : '') + '$' + dollarOutStr + '.' + centStr;
}
}
Download this code: dollarFormat-js-snippet
Here’s a little test output:
trace(this.dollarFormat(".004")); // outputs "$0.00"
trace(this.dollarFormat(".005")); // outputs "$0.01"
trace(this.dollarFormat(".014")); // outputs "$0.01"
trace(this.dollarFormat(".015")); // outputs "$0.02"
trace(this.dollarFormat(".019")); // outputs "$0.02"
trace(this.dollarFormat("000.123")); // outputs "$0.12"
trace(this.dollarFormat("1.234")); // outputs "$1.23"
trace(this.dollarFormat("12")); // outputs "$12.00"
trace(this.dollarFormat("123")); // outputs "$123.00"
trace(this.dollarFormat("1234")); // outputs "$1,234.00"
trace(this.dollarFormat("12345")); // outputs "$12,345.00"
trace(this.dollarFormat("123456")); // outputs "$123,456.00"
trace(this.dollarFormat("123457")); // outputs "$123,457.00"
trace(this.dollarFormat("1234578")); // outputs "$1,234,578.00"
trace(this.dollarFormat("12345789")); // outputs "$12,345,789.00"
Download this code: dollarFormat-output
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