Rails 3 routes in Javascript

rails3jsroutes.erb

<script type="text/javascript">
	var __RouteCurry = function(route){
		return function(options){
			var routeMod = route;
			if (typeof options == "string" || typeof options == "number"){
				routeMod = routeMod.replace(/:[a-zA-Z0-9\_]+/,options);
			}
			else{
				for(key in options){
					routeMod = routeMod.replace(":"+key, options[key]);
				}				
			}
			routeMod = routeMod.replace(/\([^\(]*:[^\(]+\)/g,"");
			routeMod = routeMod.replace(/\(|\)/g,"");
			return routeMod;
		}
	};
	
	var UrlFor = {
		<%= raw ((ActionController::Routing::Routes.named_routes.names.map do |route|
			"#{route} : __RouteCurry(#{ActionController::Routing::Routes.named_routes[route].path.to_json})"
		end).join(",") )
			%>
	};
	
</script>

This lets you to things like

UrlFor.people(1); // /people/1
UrlFor.people({id : 1}); // /people/1

and any other named routes your helpers already give you.

Regex on line 13 won't work for all routes. Nested optional parameters will mess it up, for example.