Question

I have an URL like this:

http://site.com/galleries/galleryname/imageID123/lightbox/

and using a script to replace the lightbox URL with nothing (when lightbox overlay is closed):

document.URL.replace('lightbox/', '')

Things get messy when user has a gallery also named “lightbox”, then the URL is:

http://site.com/galleries/lightbox/imageID123/lightbox/

I need to make sure that docment.URL.replace will replace only the last occurrence of the word.

Answer 1

try this

document.URL.replace(/lightbox\/$/, '')

Im talking as the parser :

document.URL.replace('lightbox/', '')

Ok , whenever i find lightbox/ i will replace it with "empty"
but wait ! there’s more than 1 . so I’ll do it .

but wait ! since you didnt supply the g flag – i will do it only to the first.
(if you did supply the g flag it will replace ALL occurrences !)

any way –

we dont want that.

so how do we tell him only the last ?

well use the $ sign. which represent the end of the string.

so i want you to replace only lightbox which has / after and the / is the END OF THE WORD.