Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??


I have looked at the code and I have written a program that could be used as a starting point for what you are trying to achieve.

This program does not cover all of what you are trying to do, it simply goes up to splitting the milcar file and loading a hash. I hope this gives you an idea of some perl's best practises (or what I would consider best practises), and help you complete your task.

Kind regards.

use strict; # Please use these 2 pragmas use warnings; use autodie; #this one comes handy as well if (@ARGV !=4 ) { die "Ooops etc.."; } # a more descriptive name for your vars, otherwise you may as well # use $ARV[0], $ARGV[1] etc... my ($milcar_filename, $check_file, $matches_file, $three_column_file) += @ARGV; #use the 3 args version of open; open my $fh, '<', $milcar_filename; #prg will 'die' if file error due to the autodie pragm +a #store some values into a hash my %hash; while my $line(<$fh>) { chomp $line; # I assume here that the milcar file is pipe separated # but replace the separator with the separaor of your choice my ($last_name, $first_name, $integer1, $word1, $integer2, $word2, $real_number) = split /\|/, $line; #build a key, see if the key already exists, and # update with the latest int2 value, if larger. my $key = $last_name . '_' . $first_name; if (exists $hash{$key} ) { if ($integer2 > $hash{key} ) { $hash{$key} = $integer2; } } else { $hash{$key} = $integer2; } }

In reply to Re: Writing Program With Hashes and Loops For Files With Data in Columns by arnaud99
in thread Writing Program With Hashes and Loops For Files With Data in Columns by prpheart

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others perusing the Monastery: (7)
    As of 2017-07-24 19:31 GMT
    Find Nodes?
      Voting Booth?
      I came, I saw, I ...

      Results (357 votes). Check out past polls.