Exact string match with javascript regex

Question

I'm struggling with what is probably a very simple regex problem. I'm working on a simple prototype and need to know what page I'm on, so I don't reload it if the user clicks a menu widget to navigate to the same view.

I have two URLs the user can switch between:

http://localhost/TestMVC/Larry/LarryTiles

http://localhost/TestMVC/Larry/LarryTilesList

The URLs can also have some trailing querystring items, like this: http://localhost/TestMVC/Larry/LarryTilesList?filterValue=servers

LarryTiles is giving me the problem. "/\bLarryTiles\b/" worked on Friday (after answers from other questions here) but this doesn't match now. :)

I need to find exactly the strings "LarryTiles" and "LarryTilesList" in these two URLs but can't quite figure out how to do that. The URL changes between my local machine and the various servers where it's hosted, so I can't rely on position.

EDIT: added the example with a trailing querystring, which I'd forgotten. Sorry :(

jfriend00 · Accepted Answer · 2012-04-05 23:20:38Z

2

You can get the last path segment of an URL like this:

function getLastPathSegment(url) {
    var match = url.match(/\/([^\/]+)\/?$/);
    if (match) {
        return(match[1]);
    }
    return("");
}

// returns "LarryTiles"
getLastPathSegment("http://localhost/TestMVC/Larry/LarryTiles");     

// returns "LarryTilesList"
getLastPathSegment("http://localhost/TestMVC/Larry/LarryTilesList");

So, you could do this:

var endPath = getLastPathSegment(window.location.pathname);
if (endPath == "LarryTiles") {
    // some code
} else if (endPath == "LarryTilesList") {
    // some code
} else {
    // some code
}

edited Apr 5, 2012 at 23:20

answered Apr 5, 2012 at 21:48

jfriend00

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3 Comments

jfriend00 Over a year ago

Per new info from OP, I updated my example to use window.location.pathname so any query string or hash tag is already stripped off before comparison.

dex3703 Over a year ago

I'm testing this, but VS and Chrome both say there is an error in your regex.

jfriend00 Over a year ago

@dex3703 - Yes, sorry there was a typo that I've fixed.

anubhava · Accepted Answer · 2012-04-05 22:18:46Z

0

You can use this code:

str = 'http://localhost/TestMVC/Larry/LarryTiles?filterValue=servers';

if (str.match(/\/([^\/?]+)(?=\/$|\?|$)/)) {
   if (match[1] == 'LarryTiles')
       alert('LarryTiles found');
   else if (match[1] == 'LarryTilesList')
       alert('LarryTilesList found');
}

edited Apr 5, 2012 at 22:18

answered Apr 5, 2012 at 21:50

anubhava

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4 Comments

jfriend00 Over a year ago

This is vulnerable to a trailing slash.

anubhava Over a year ago

Agreed but URLs in OP's question don't have trailing slash.

anubhava Over a year ago

Based on your latest edited question I updated my answer to handle trailing slash, query string etc cases.

dex3703 Over a year ago

Thanks. I note this will find both "LarryTiles" and "/LarryTiles", but I just take match[1] as you have above. Works great. That's one scary regex!

mikevoermans · Accepted Answer · 2012-04-05 21:48:43Z

0

Seems like what you explained works, otherwise try this: http://jsfiddle.net/Wfz9d/

Do you have a case-sensitivity issue?

answered Apr 5, 2012 at 21:48

mikevoermans

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1 Comment

dex3703 Over a year ago

Case isn't an issue, though these are the URLs being used.

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