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Re^2: get n lines before a pattern

by darklord_999 (Acolyte)
on Jul 25, 2012 at 14:55 UTC ( #983676=note: print w/replies, xml ) Need Help??


in reply to Re: get n lines before a pattern
in thread get n lines before or after a pattern

I have updated the details of my file. Please see the change . Sorry for the previous error.

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Re^3: get n lines before a pattern
by VinsWorldcom (Parson) on Jul 25, 2012 at 15:16 UTC

    Yes, the changes to the file in the OP certainly require an updated approach. What have you tried?

    I would loop through the file saving each key and either pushing to a data structure if the name matches or resetting and continuing.

    Pseudo code for the loop and structure I'd use:

    my @matches; my $FOUND = 0; my %info = {}; while (<INFILE>) { chomp $_; if (($_ =~ /^id/) and ($FOUND)) { push @matches \%info; $FOUND = 0; %info = {} } if ($_ =~ /^id/) { (undef, $info{id}) = split / /, $_} if ($_ =~ /^address/) { (undef, $info{address}) = split / /, $_} if ($_ =~ /^name/) { (undef, $info{fname}) = split / /, $_} ... if ($searchPattern eq $info{fname}) { $FOUND = 1; } }

    UPDATE: Added 'chomp' and updated 'split' commands as per kennethk suggestions to me.

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[stevieb]: Then throw in changes to Windows that throws everything you trusted right out the window.
[shmem]: that's why it is called "Windows"
[stevieb]: shmem thanks for the 'insight' :P
[shmem]: good thing that Sun already took "OpenWindows", otherwise I'd not stop to shudder imagining an "OpenWindows" from MS
[shmem]: more garbage in, more garbage out that would be
[stevieb]: I found that win10 broke a C# library I was using for one project while enhancing tests for a Perl dist, which breaks other Perl dists, and I'm about to throw my hands up on berrybrew. win2k12 broke one thing, win10 breaks something...
[stevieb]: ...unrelated which requires replacing a lot of code and a whole lib. I'm about to go nix only ffs
[shmem]: stevieb: what you're doing sounds afwully complex. Too much for me this evening to provide brighter insight ;-)
[stevieb]: I don't even own a Windows computer. Both my girl and I have a laptop each with Linux. I'm supporting Windows in some of my projects and I can't even guage whether it's worth it or not.

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