Re^3: Splitting an url in its components

Well, you can special-case it, but then it'll only work for .tar.gz:

s{\.(?:tar\.gz|[^.]+)\z}{};
[download]

The problem is that, in general, you can't know from a file name which part of it is "extension" and which part is not, unless you either have a clear-cut definition of what "extension" means (I don't know any that satisfies your requirement), or you have a list of all possible extensions.

Comment on Re^3: Splitting an url in its components Download Code

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Re^4: Splitting an url in its components by baurel (Sexton) on Jul 17, 2008 at 15:42 UTC
this is great and exactly what I was looking for :-) for my personal learning purposes: I don't fully understand the expression "(?:tar\.gz\|^.+)" - what does the part '?:tar\.gz' mean? thanks so far for your help ben	[reply]
Re^5: Splitting an url in its components by moritz (Cardinal) on Jul 17, 2008 at 15:48 UTC
There is no `?:tar\.gz` part, because `(?: ... )` has a distinct meaning (it's grouping without capturing), and `tar\.gz` just matches the string `tar.gz`.	[reply] [d/l] [select]
Re^5: Splitting an url in its components by Anonymous Monk on Jul 18, 2008 at 04:44 UTC
Use `<c> code here </c>` tags (Markup in the Monastery). Install YAPE::Regex::Explain, because use YAPE::Regex::Explain; print YAPE::Regex::Explain->new(qr~(?:tar\.gz\|[^.]+)~)->explain; __END__ The regular expression: (?-imsx:(?:tar\.gz\|[^.]+)) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- (?: group, but do not capture: ---------------------------------------------------------------------- tar 'tar' ---------------------------------------------------------------------- \. '.' ---------------------------------------------------------------------- gz 'gz' ---------------------------------------------------------------------- \| OR ---------------------------------------------------------------------- [^.]+ any character except: '.' (1 or more times (matching the most amount possible)) ---------------------------------------------------------------------- ) end of grouping ---------------------------------------------------------------------- ) end of grouping ---------------------------------------------------------------------- [download]	[reply] [d/l]