angular filters for currency formatting

gistfile1.txt

angular.module("filters", [])
    .filter('round', function () {
        return function (input, precision) {
            return input ? parseFloat(input).toFixed(precision) : "";
        };
    })
    .filter('dollars', function () {
        return function (input) {
            return input ? '$' + input : ''
        };
    })
    .filter('commas', function () {
        return function (input) {
            return input ? input.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") : '';
        }
    })

Usage: {{ value | round:2 | commas | dollars }}

or even better, use the built-in currency filter... duh!

{{ value | currency }}

._.