Re: [MLUG] String manipulation in C

[Mike Miller <EMAIL:PROTECTED>]

On Sun, 1 Jul 2007, Mike Miller wrote:

> On Sun, 1 Jul 2007, Mike Miller wrote:
>
> > perl -pi -e 's/^(.*?)ABC.*ABC(.*?)$/$1ABC$2/' file*.txt
>
>
> If you just wanted the lengths of the two strings you could do this:
>
> perl -pi -e 's/^(.*?)ABC.*ABC(.*?)$/length ($1) ." ABC ". length ($2)/e' file*.txt


One more:

perl -pi -e 's/(.*?)ABC(.*?)/length ($1) ." ABC ". $2/eg ; s/ ([^ ]+)$/" ". length ($1). "\n"/e' file*.txt

Testing:

echo 'asdfasdABCasdfasdfasdfABCasdfasdfasdfasdfasdfABCasdfasdfasdf' | perl -pe 's/(.*?)ABC(.*?)/length ($1) ." ABC ". $2/eg ; s/ ([^ ]+)$/" ". length ($1). "\n"/e'
7 ABC 12 ABC 20 ABC 13

That replaces all non-matching sequences with their lengths.  I used 
'asdf' because it is easy to type and you can still readily see the ABCs. 
With consecutive ABC strings it gives '0', as it should.

I know you want to do this in C, and I'm not trying to change your mind. 
I just wanted to try a few tricks to see what I might have done.  I don't 
do C programming but I am into learning perl and regexes, though I'm 
certainly very far from having mastered them.  In fact, I'll bet both Jon 
and Stephen would have better ways of doing what I did above.

Mike

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