Parse "hashbang" `#!` arguments like url query-string. [original source](https://gist.github.com/miohtama/1570295)

parse-hash-bang-arguments-in-javascript.js

/**
 * Parse hash bang parameters from a URL as key value object.
 * For repeated parameters the last parameter is effective.
 * If = syntax is not used the value is set to null.
 * #!x&y=3 -> { x:null, y:3 }
 * @param url URL to parse or null if window.location is used
 * @return Object of key -> value mappings.
 * @source https://gist.github.com/zaus/5201739
 */
function hashbang(url, i, hash) {
	url = url || window.location.href;

	var vars = {}, hashes = url.slice(url.indexOf('#!') + 2).split('&');

	for(i = hashes.length; i--;) {
		hash = hashes[i].split('=');

		vars[hash[0]] = hash.length > 1 ? hash[1] : null;
	}

	return vars;
}

this is a bit better:

    function hashbang(url, i, hash) {
        debugger;
        url = url || window.location.href;

        var pos = url.indexOf('#!');
        if( pos < 0 ) return [];
        var vars = [], hashes = url.slice(pos + 2).split('&');

        for(i = hashes.length; i--;) {
            hash = hashes[i].split('=');

            vars.push({ name: hash[0], value: hash.length > 1 ? hash[1] : null});
        }

        return vars;
    }