Mark Carroll grabbed a keyboard and wrote:
> David Guntner <david@guntner.com> writes:
>
>> Mark Carroll grabbed a keyboard and wrote:
> (snip)
>>> for i in *_????????_default\.m??
>>> do mv "$i" "`echo $i | sed 's/.\{17\}\(.\{4\}\)$/\1/'`"
>>> done
>>
>> Ooh, yea, that looks like it would do it, way better than what I came up
>> with if it doesn't require a specific number of fields. I'm a little
>> vague on my sed syntax, though. Could you break that down and explain
>> how that's doing what it does?
>
> Sure. First, the \ in the first line is superfluous. (-:
>
> The sed replacement is:
>
> - 17 characters, the count marked within \{ \}
> - 4 characters is capture group 1, marked within \( \)
> - the end of the string, marked with $
> replace with
> - group 1, marked with \1
>
> So,
> - the 17 are for the _????????_default
> - group 1 is for .m4a
> to replace _????????_default.m4a with .mp4
>
> Using the $ to anchor to the end of the string is the key here. I can be
> sloppy about what characters match because the glob in the for loop did
> my matching for me.
Very cool, and slick, too. :-) Thanks!
--Dave
Attachment:
smime.p7s
Description: S/MIME Cryptographic Signature