On Wed, Nov 24, 2004 at 08:57:03AM -0800, Trevor M. Lango wrote: > On Wednesday 24 November 2004 00:15, Foo Lim wrote: > > On Wed, 24 Nov 2004, Trevor M. Lango wrote: > > > On Tuesday 23 November 2004 23:41, Foo Lim wrote: > > > > On Tue, 23 Nov 2004, Trevor M. Lango wrote: > > > > > I have been reading the man pages and I'm lost. ?I want to scan > > > > > through an input file for an expression with this pattern: > > > > > > > > > > ? ? h.*.JPG > > > > > > > > > > and replace it with an expression with the following pattern: > > > > > > > > > > ? ? *.h.JPG > > > > > > > > > > Perl and awk both appear to be ideal candidates for just such a task > > > > > but I'm a serious newbie to both of 'em. ?Any help much appreciated! > > > > > > > > Hi Trevor, > > > > > > > > Does the pattern "h.*.JPG" match something like this: h.abc123.JPG ? > > > > > > Something like this: "h.#-##-####-####.###.JPG" > > > > > > > Since the period "." is a metacharacter in regular expressions. If > > > > that's the case, then a perl script like this would work: > > > > > > > > while (<>) { > > > > s/h\.(.*)\.JPG/$1.h.JPG/g; > > > > print; > > > > } > > > > > > > > FL > > > > The code above should work. If it's possible to have multiple files on a > > line, you may want to change the regex to this: > > > > s/h\.(.*?)\.JPG/$1.h.JPG/g; > > > > instead, so it will minimal match instead of do a greedy match. > > Okay I am not having any success. Perhaps I need to be more specific - I am > trying to scan through html files to replace the image references in lines > like this one: > > <img align=right src="/IMAGES/C/h.I-LP-CEUR-AD.003.jpg" > > In this particular example, I need to replace: > > h.I-LP-CEUR-AD.003.jpg > > with: > > I-LP-CEUR-AD.003.h.jpg > > Thank you for your responses!
Capitalization counts. If the files are named with a .jpg, then your regexp pattern has to say .jpg. If the files are named with a .JPG, then your regexp pattern has to say .JPG. There is a flag that you can add at the end (were the g is) to do a case insensitive match, but not to do a case insensitive, but not to make the replacement string case insensitive. -- I usually have a GPG digital signature included as an attachment. See http://www.gnupg.org/ for info about these digital signatures.
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