It's a little difficult to understand the specific details (that and it's hard to read w/o
<code> tags), but I think I can figure out enough to help you.
Create a hash. Read the 10K file first. Use the 1st col as the key and the rest of the record as the value.
Then when you loop over the second file if the first col exists in the original hash, write whatever record you want to the file.
Here is some code - It may not do exactly what you want, but that is because I'm guessing your spec.
## UNTESTED
use strict;
my %hash;
open(FH,'<','oldfile') or die "$!\n";
foreach (<FH>) {
chomp;
my ($key,$data) = split(/\|/,$_,2);
$hash{$key} = $data;
}
close FH;
open(NEW,'<','newfile') or die "$_\n";
open(OUT,'>','outfile') or die "$_\n";
foreach (<NEW>) {
chomp;
my ($key) = split(/\|/,$_,2);
if ( exists $hash{$key} ) {
print OUT "$hash{$key}\n";
}
}
grep
One dead unjugged rabbit fish later...
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.