More conforming implementation of Function.prototype.bind about jasmine-rails

[rymohr]

Nice catch. Not sure how the bind implementation I used even allowed my specs to pass.

Here's the corrected implementation:

http://jsfiddle.net/jCpkH/

if (typeof Function.prototype.bind !== "function") {
    Function.prototype.bind = function(context) {
        var slice = Array.prototype.slice;
        var fn = this;

        return function() {
            var args = slice.call(arguments, 1);

            if (args.length) {
                return arguments.length
                    ? fn.apply(context, args.concat(slice.call(arguments)))
                    : fn.apply(context, args);
            } else {
                return arguments.length
                    ? fn.apply(context, arguments)
                    : fn.call(context);
            }
        };
    };
}