please cc the list On Fri, 2004-08-13 at 17:21, Errin Larsen wrote: > ok ... let's say I have an array composed of strings like this: > > ## foobar.txt ## > one two three > A B C > yes no maybe > > ## Perl Script ## > #!/usr/bin/perl > use strict; > use warnings; > my @myarray = `cat foobar.txt`; > > and now I want to put the first two words of each line into a hash, so > we'd end up with: > > my %myhash = ( one=>two, A=>B, yes=>no ); > > what's a nice, perl - y way of doing that?
perl -nae '$hash{$F[0]}=$F[1]; END{ # do something with %hash}'
That should do the trick
> --Errin
>
> On 13 Aug 2004 16:57:00 +0100, Jose Alves de Castro <[EMAIL PROTECTED]> wrote:
> > On Fri, 2004-08-13 at 16:51, Errin Larsen wrote:
> > > um, can anyone explain the 'print' function below to me?
> > >
> > > specifically ... this:
> > >
> > > 'print "@F[0,5]"'
> >
> > The -a signal splits the input lines and stores the resulting elements
> > in @F
> >
> > Example:
> >
> > perl -nae 'print "$F[1]\n"' file.txt
> >
> > where file.txt contains
> >
> > one two three
> > four five six
> >
> > prints:
> >
> > two
> > five
> >
> > Also, although this splitting on spaces, you can also use the -F signal
> > to define what you're splitting in.
> >
> > See `perldoc perlrun`
> >
> > HTH,
> >
> > jac
> >
> > PS:
> >
> > Oh, print "@F[0,5]", of course, prints the first six elements of @F, and
> > since they're between double quotes, they're joined with whatever is in
> > $" (usually a space)
> >
> >
> >
> > > How do I use this idea in a script instead of a command line? also,
> > > how is the input getting into this function? I mean, I understand $_
> > > and all, but on a command line, are we piping to that command? what's
> > > with the '@F'?
> > >
> > > Thanks for the help!
> > >
> > > --Errin
> > >
> > >
> > > On Fri, 13 Aug 2004 09:52:04 -0400, [EMAIL PROTECTED]
> > > <[EMAIL PROTECTED]> wrote:
> > > > Thanks too all who passed some knowledge on, but I ended up using :
> > > >
> > > > while (<D>) {
> > > >
> > > > ## look for 9840S and ebexpire
> > > > ## declare OFS = tab
> > > > ## tell split to split on IRS 0,1&5. very similar to awk
> > > > print $
> > > >
> > > > if (($_ =~ /9840S/) && ($_ =~ /ebexpire, ebexpire/ )) {
> > > > local $, = "\t";
> > > > print FOO +(split)[0,1,5], $/;
> > > > #print +(split)[0,1,5], $/;
> > > >
> > > > Derek B. Smith
> > > > OhioHealth IT
> > > > UNIX / TSM / EDM Teams
> > > > 614-566-4145
> > > >
> > > > "John W. Krahn" <[EMAIL PROTECTED]>
> > > > 08/13/2004 08:51 AM
> > > >
> > > > To: Perl Beginners <[EMAIL PROTECTED]>
> > > > cc:
> > > > Subject: Re: awk like question
> > > >
> > > > [EMAIL PROTECTED] wrote:
> > > > > All,
> > > >
> > > > Hello,
> > > >
> > > > > wasn't sure if this was received b/c I got a reurne to sender error.
> > > > >
> > > > >
> > > > > How can I print certain fields delimited by ' '?
> > > > > In awk I would write awk '{print $1, $6}' filename
> > > >
> > > > The Perl equivalent of that is:
> > > >
> > > > perl -lane 'print "@F[0,5]"'
> > > >
> > > > > Here is an out file that I want to grab data from :
> > > > >
> > > > > 04/29/04 11:00:28 [ 6687:ebexpire, [EMAIL PROTECTED] E00796 9840S 537
> > > >
> > > > > 2B0234233543E6A4
> > > > > 04/29/04 11:00:28 [ 6687:ebexpire, [EMAIL PROTECTED] E00830 9840S 571
> > > >
> > > > > D402325A8345ABDE
> > > > > 04/29/04 11:00:28 [ 6687:ebexpire, [EMAIL PROTECTED] E00066 9840S 127
> > > >
> > > > > 5202333193B75CBB
> > > > > 04/29/04 11:00:28 [ 6687:ebexpire, [EMAIL PROTECTED] E00501 9840S 168
> > > >
> > > > > 4B0233BABA5813F6
> > > > >
> > > > > I want fields one two and six or the date, time and E string.
> > > > > Does it matter whether I use a foreach or a while (<filehandle>) ?
> > > >
> > > > You could write that in Perl as:
> > > >
> > > > perl -lane 'print "@F[0,1,5]"'
> > > >
> > > > John
> > > > --
> > > > use Perl;
> > > > program
> > > > fulfillment
> > > >
> > > > --
> > > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > > For additional commands, e-mail: [EMAIL PROTECTED]
> > > > <http://learn.perl.org/> <http://learn.perl.org/first-response>
> > > >
> > > >
> > --
> > José Alves de Castro <[EMAIL PROTECTED]>
> > http://natura.di.uminho.pt/~jac
> >
> >
> >
--
José Alves de Castro <[EMAIL PROTECTED]>
http://natura.di.uminho.pt/~jac
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