# Path-to-RegExpTurn an Express-style path string such as `/user/:name` into a regular expression.**Note:** This is a legacy branch. You should upgrade to `1.x`.## Usage```javascriptvarpathToRegexp=require('path-to-regexp');```### pathToRegexp(path, keys, options) -**path** A string in the express format, an array of such strings, or a regular expression -**keys** An array to be populated with the keys present in the url. Once the function completes, this will be an array of strings. -**options** -**options.sensitive** Defaults to false, set this to true to make routes case sensitive -**options.strict** Defaults to false, set this to true to make the trailing slash matter. -**options.end** Defaults to true, set this to false to only match the prefix of the URL.```javascriptvarkeys=[];varexp=pathToRegexp('/foo/:bar',keys);//keys = ['bar']//exp = /^\/foo\/(?:([^\/]+?))\/?$/i```## Live DemoYou can see a live demo of this library in use at [express-route-tester](http://forbeslindesay.github.com/express-route-tester/).## License MIT