Hash.substitute.js

Hash.implement({
	substitute: function(template, regexp){
		return template.replace(regexp || (/\\?\{([^{}]+)\}/g), function(match, name){
			if (match.charAt(0) == '\\') return match.slice(1);
			if (this.get(name)) return this.get(name);
			if (name.contains(".")) {
				var found = this.getFromPath(name);
				return found ? found : "";
			}
		}.bind(this));
	}
});