string.Format for AngularJS

Angular.Filter.Format.js

/*	AngularJS string.Format filter
 *
 *	This filter provides string variable replacement similar to C# string.Format("{0}", "something");
 *
 *	Usage: {{ "From model: {0}; and a constant: {1};" | format:model.property:"constant":...:... }}
 */

(function (angular) {

	angular
		.module("ng")
		.filter("format", function () {
			return function (input) {
				var args = arguments;
				return input.replace(/\{(\d+)\}/g, function (match, capture) {
					return args[1*capture + 1];
				});
			};
		});

})(angular);

1*capture...? Isn't 1 * anything = anything

Just tried it in the console (enter the funny "typeless" world of javascript)
"1"+1 ="11"
1_"1"+1=2
so the 1_capture forces javascript to evaluate capture as number and then adds 1 resulting in a number.
else "1"+1 means append 1 to the string "1".

@miller45 thanks!
So recant PEMDAS still applies even when the variables aren't numbers

1*"3"+1 = 4

Use args[parseInt(capture, 10) + 1] which is understood by everyone, not some type conversion magic.

For "typeless" use:

args[Number(capture) + 1]

how to call this filter inside the controller

I guess you probably found a solution for that, however I will answer that for any future questions:

You can use that through $filter. In your controller parameters inject $filter so you can use any filter inside your controller by simply passing its name as a parameter, like this:

var value = $filter('filterName')(input);

Instead of using Number() for the parsing to a number you can add a + in front of it. Like return args[+capture + 1];