Here is what I got so far: 
open(FILE1, $ARGV[0]);
while($line = <FILE1>) {
        chomp($line);
    @words = split(/\t/, $line);
        $hash1{$words[0]} = $words[1];
}
close(FILE1);
open(FILE3, ">$ARGV[2]");
while (($key, $value) = each(%hash1)){
    print FILE3 $key."\t".$value."\n";
}

print "\n";
open(FILE1, $ARGV[1]);
%hash2 = map { chomp; split /\t/ } <FILE1>;
close(FILE1);
while (($key, $value) = each(%hash2)){
    print FILE3 $key."\t".$value."\n";
}

print "\n";

[download]
__DATA1__
trip    value1    value2
ATG    adsad    dsf
CTG    23432    2342
TTA    24312    144
CTT    452    5fw
ATA    rff    sgsh

__DATA2__
trip    value3
ATG    asdas
CCG    asdadd
TTA    24
CAT    45

__OUTPUT / DESIRED__
trip    value1    value2   value3
ATG    adsad    dsf    asdas
TTA    24312    144    24

[download]

In reply to Re: Hash w/ multiple values + merging by sophix
in thread Hash w/ multiple values + merging by sophix

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.