finished writing the full join in perl (after which have to do a sort and uniq to strip duplicates)....it's been running for 10 minutes now and still hasn't finished processing first file.....here's the code 
open(HOLDS,"<holds") or die;
while($hold=<HOLDS>) {
    chomp $hold;
    @holds = split(/\|/,$hold,-1);
    $lookup = $holds[0];
    open(COPIES,"<copies") or die;
    undef $matched;
    while($copy=<COPIES>) {
        chomp $copy;
        @copies = split(/\|/,$copy,-1);
        $matchfield = $copies[0];
        if($lookup eq $matchfield) {
            $matched = 1;
            print "hold and copy\n";
        }
    }
    if(!$matched) {
        print "hold\n";
    }
    close COPIES;
}
close HOLDS;
open(COPIES,"<copies") or die;
while($copy=<COPIES>) {
    chomp $copy;
    @copies = split(/\|/,$copy,-1);
    $lookup = $copies[0];
    open(HOLDS,"<holds") or die;
    undef $matched;
    while($hold=<HOLDS>) {
        chomp $hold;
        @holds = split(/\|/,$hold,-1);
        $matchfield = $holds[0];
        if($lookup eq $matchfield) {
            $matched = 1;
            print "copy and hold\n";
        }
    }
    if(!$matched) {
        print "copy\n";
    }
    close HOLDS;
}
close COPIES;

[download]

In reply to Re: Re: Re: many to many join on text files by aquarium
in thread many to many join on text files by aquarium

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.