From: Daniel Sheppard <daniels@...>
Date: 2006-06-07T11:19:21+09:00
Subject: Re: regex for splitting filenames

> I was wondering though if instead of the temp variable I 
> could just do:
> 
> fileroot, type = filename.split(/regex here?/)
> 
> I cannot find a way to write a regex that only matches the 
> last period in the 
> filename. Is there an elegant way to do this?

Not sure if it can be considered elegant, or if it'll work in all
situations, but:

fileroot, type = /^([^.]*$|.*(?=\.))\.?(.*)$/.match(filename)[1..2]

Seems to work for the tests I can think of:

fdasfa              => ["fdasfa", ""]
.fdsafds            => ["", "fdsafds"]
dda.dfasd           => ["dda", "dfasd"]
fdsafd.fdsdaf.fdsaf => ["fdsafd.fdsdaf", "fdsaf"]
fdasfas.            => ["fdasfas", ""]

Alternatively, the following might be easier to read:

fileroot, type = (/(.*)(\..*)/.match(filename)||[nil,filename])[1..2]