Javascript regex preg_replace

Question

Regex (ported from PHP to Javascript, Node.js) applied on this string:

/users/:uid/posts/:pid
/users/:uid
/messages/:mid

The strings above, contain arguments (after the ":" symbol) untill the next forward slash, I replace these with a string regex. And eventually it should be like this:

/users/([a-zA-Z0-9\-\_]+)/posts/([a-zA-Z0-9\-\_]+)

So all the arguments in the routing, should be replaced with a regular expression string. I use the following code to achieve this:

var fixedRoute = route[url].replace(/\\\:[a-zA-Z0-9\_\-]+/, '([a-zA-Z0-9\-\_]+)');

The output is the same, the strings are not replaced. Can anyone help me with this regex?

Thanks alot

var routes = { 'GET /users/': { 'controller': 'users', 'action': 'get' } the first string 'GET /users/' would be the content of route[url] — onlineracoon
– onlineracoon, Commented Jul 31, 2012 at 0:25

GitaarLAB · Accepted Answer · 2012-07-31 00:31:36Z

1

You forgot the capturing group and it's backreference.

So that would become something like 'hihi-foobar'.replace(/foo(bar)/i, $1);
would render 'hihi-bar'.

UPDATE (based on comments above):

.replace(/:[upm]id/ig, ([a-zA-Z0-9\-\_]+));

edited Jul 31, 2012 at 0:31

answered Jul 31, 2012 at 0:08

GitaarLAB

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4 Comments

onlineracoon Over a year ago

I have tried using /g as global modifier but it did not work ... what else could be causing the problem?

onlineracoon Over a year ago

I don't understand with capturing group / back reference.

GitaarLAB Over a year ago

you don't need to anymore. Regex from update will replace 'uid', 'pid' and 'mid' with what you want. You can quickly try this regex over here and see that it works!

GitaarLAB Over a year ago

Thank you for the accept! Do you understand the regex or need extra explanation?

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