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Re: grep
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From:
Sudarsan Raghavan
Date:
April 2, 2002 23:01
Subject:
Re: grep
Message ID:
3CAAA8AC.9CD1FC4A@india.hp.com
Sudarsan Raghavan wrote:
> Mandar Rahurkar wrote:
>
> > Hi,
> > thanks to everyone for replying however I think i failed to define the
> > problem accurately :
> >
> > i have files assigned to @files variable :
> >
> > 2168a5_vow_band_1.fea
> > 169b2_vow_band_1.fea
> > 2168d6_vow_band_1.fea
> > 2168d5_vow_band_1.fea
> > 169g3_vow_band_1.fea
> > neutral.txt
> >
> > And i want the files say for eg suffix d and 1 and with extension fea.The
> > thing is if i try to match d all will get matched for obvious reason.
> >
> > basically I wanna generate the same output as of the following command on
> > shell prompt :
> > ls ???[g][^1] *.fea
> > ** will generate all files whose 4th char is g followed by character which
> > is not 1.
>
> Loop through the array and check the value against this regexp
> m/.{3}g[^1].*\.fea/
This can also be written as m/.{3}g(?!1).*\.fea/
>
> If the array is being populated through some kind of file listing, my
> earlier suggestion
> holds.
>
> >
> >
> > ls ???[^g][^1] *.fea
> >
> > Many Thanks....please do send in ur replies.
> >
> > Mandar
> >
> > On Wed, 3 Apr 2002, Sudarsan Raghavan wrote:
> > 2168a5_vow_band_1.fea
> > > > 169b2_vow_band_1.fea
> > > > 2168d6_vow_band_1.fea
> > > > 169g3_vow_band_1.fea
> > > > neutral.txt
> > > >
> >
> > > Mandar Rahurkar wrote:
> > >
> > > > Hi,
> > > > I need to select particular files from list that looks like this :
> > 2168a5_vow_band_1.fea
> > > > 169b2_vow_band_1.fea
> > > > 2168d6_vow_band_1.fea
> > > > 169g3_vow_band_1.fea
> > > > neutral.txt
> > > >
> > > > 2168a5_vow_band_1.fea
> > > > 169b2_vow_band_1.fea
> > > > 2168d6_vow_band_1.fea
> > > > 169g3_vow_band_1.fea
> > > > neutral.txt
> > > >
> > > > This is how the list if files look like.I need files with only g for
> > > > eg
> > > > I can do it in linux as follows :
> > > > but this doesnt work in perl :
> > >
> > > Use the glob operator (perldoc -f glob and perldoc File::Glob)
> > > For e.g. to list files that start with 16
> > > perl -e 'print "$_\n" while (<16*>)'
> > > ^^^^^
> > > This is the how
> > > the glob operator is used for this e.g.
> > >
> > >
> > > >
> > > > ls ???[g][^1] *.fea
> > > > ls ???[^g][^1] *.fea
> > > >
> > > > I tried using :
> > > > exec(`ls ???[d][^1]*.fea > temp.neutral`) in perl doesnt work.
> > > > Please help...
> > > >
> > > > Many Thanks
> > > > Mandar
> > > >
> > > > __________________________________________________
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> > > >
> > > > --
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> > >
> > >
> > > --
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> > >
>
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