ybiC,

I think you want to look at an if exists statement for your hash. It will look at a primary key and return true if it exists. As for the sort, you are on your own for that, I haven't needed to learn that function yet. %^) Update: Posted this code per ybiC's request. Here is some code I pieced together that compared two files into a hash.


#!/usr/bin/perl -w

use strict;
use diagnostics;

my $file1 = "/home/scott/PerlHacks/post.office/file1";
my $file2 = "/home/scott/PerlHacks/post.office/file2";
my $hashOfLists;
my %hashOfLists;

open (FILE1, "$file1") or die "Could not open $file1 $!";
open (FILE2, "$file2") or die "Could not open $file2 $!";


######################################################
#####This block reads all of the items of the file into
#####a hash with the item being the key. Since I
##### was comparing 2 files each key received a
#####value of 1 if it was in the first file, 2 if
#####it was in both , and 3 if it was only in file 2
######################################################

foreach (<FILE1>)
{
chomp $_;
$hashOfLists{$_} =1;
}


foreach (<FILE2>)
{
chomp $_;
######################################################
#####if exists checks the hash to see if $_ exists.
##### If true $_'s value becomes 2,
#####if false, $_ gets a value of three ##############################
+########################
if (exists $hashOfLists{$_})
{
($hashOfLists{$_}) =2;
}
else
{
($hashOfLists{$_})=3;
}
}


close FILE1 or die "Could not close $file1 $!";
close FILE2 or die "Could not close $file2 $!";

[download]

"The social dynamics of the net are a direct consequence of the fact that nobody has yet developed a Remote Strangulation Protocol." -- Larry Wall



Edited by planetscape - added code tags

( keep:0 edit:18 reap:0 )

In reply to Re: extract uniques and sort by scottstef
in thread extract uniques and sort by ybiC

Title:
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, details, 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, summary, 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.