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Re: Extract line, matching more than one variable

by prasadbabu (Prior)
on Nov 12, 2008 at 12:20 UTC ( #723130=note: print w/replies, xml ) Need Help??


in reply to Extract line, matching more than one variable

Hi yads25,

Welcome to the Monastery! Make yourself at home.

To accomplish your task, go through perlopentut and perlre. Try some code and if you have any questions, you can come again here.

Prasad

  • Comment on Re: Extract line, matching more than one variable

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Re^2: Extract line, matching more than one variable
by yads25 (Initiate) on Nov 13, 2008 at 06:38 UTC
    Hi I tried the code....need debuging could you pl help..thank you.
    #!/usr/bin/perl -w $sasa_file= 'File1'; $pdbfile='File2'; # Remove the newline from the DNA filename open (MYXFILE,$sasa_file); open (PDBFILE, $pdbfile); while (<MYXFILE>){ chomp; @sa = split(/\t/,$_); #print "$sa[0] $sa[1] $sa[2]\n"; #$res = substr $_, 0, 4; #$res_no = substr $_, 4, 5; #$atom =substr $_, 9, 3; while (<PDBFILE>){ chomp; $res = substr $_, 17, 3; $res_no = substr $_, 22, 4; $atom =substr $_, 13, 3; #print " $res $res_no $atom \n" ; # works fine if (( $sa[0]eq$res)&&($sa[1]==$res_no)&&($sa[2] eq $atom)) { print "$_"; # does not print anything. } } } close MYXFILE; close PDBFILE;

      Hi yads25,

      Please use <code> tags to wrap the coding parts in your nodes.

      Can you please show us your sample file, so that we can give solutions without assumption.

      Prasad

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[Corion]: But now I want to register a one-shot for two events, of which only one will arrive, so my data structure doesn't work anymore...
[Lady_Aleena]: Corion, ouchy.
[Corion]: (maybe I should write this up as a SoPW) - currently, the "most efficient" data structure I come up with is a single array which I scan for the first fitting one-shot. Not efficient but I don't expect more than five outstanding one-shots anyway
[choroba]: can't you create a meta-key corresponding to the disjunction of the events?
[robby_dobby]: Corion: Heh. This whole thing smells of Strategy Pattern or MVC pattern.
[Corion]: And performance linear to the number of registered one-shots doesn't feel that bad. Maybe I should collect statistics on how many callbacks are outstanding ;)
[Corion]: choroba: Yes, but the longer I thought about efficient hashes mapping the event type back to their callbacks, and how to keep them in sync, the more I thought that all that optimization might just not be worth it, even if it's horribly inelegant
[Lady_Aleena]: My biggest problem with hashes at the moment is one with 2,501 keys.
[choroba]: how many event types are there?
[Corion]: Also I found that I can't conveniently weaken an array slot, which also is inconvenient, as I want my one-shots to disappear if the caller discards them

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