One way to get string.Format support in JavaScript

Time for a quick inspirational solution to have something similar in JavaScript as string.Format("Hello {0} {1}!", "Daniel", "Wertheim"); in C#.

String.prototype.apply = String.prototype.apply || function () {
    var arg,
        regExp,
        v = this.valueOf();

    if (!v)
        return;

    for (var i = 0, m = arguments.length; i < m; i++) {
        arg = arguments[i];
        if (arg === undefined)
            arg = null;

        regExp = new RegExp('\{' + i + '\}', 'gm');
        v = v.replace(regExp, arg);
    }

    return v;
};

This can now easily be used like this:

'Hello {0} {1}!'.apply("Daniel", "Wertheim");

Works for me, hope it’s to any help. Please feel free to suggest improvements.

//Daniel