title: How to produce URL from router path and params in node.js
body: <p>Let's say I have a "router path" (not sure what the term is exactly) that is passed to express/restify to register a route (say, <code>'/category/:id'</code>) and a params object <code>{ id: 1234 }</code>. How I can combine them into URL <code>'/category/1234'</code>, is there an npm package that can do it?</p>