You can open a filehandle on a piped command and you can also use Perl's built-in grep to do what sed does in your code. Here's an example applied to a couple of nonsense files.

$ diff dddd eeee
2c2
< werfef
---
> werftef
7c7
< esdd
---
> es4dd
$
$ diff dddd eeee | sed -re '/^[><]/d'
2c2
---
7c7
---
$

[download]

The script to do the same job.

use strict;
use warnings;

my $file1 = q{dddd};
my $file2 = q{eeee};

my @diffs = do{
       open my $diffFH, q{-|}, qq{diff $file1 $file2}
          or die qq{fork: diff $file1 $file2: $!\n};
       grep ! m{^[><]}, <$diffFH>;
   };

print for @diffs;

[download]

The output, which is identical to that produced by diff and sed on the comand line.

$ ./spw765446
2c2
---
7c7
---
$

[download]

I hope this is useful.

Cheers,

JohnGG

In reply to Re: using system() and putting results into an array by johngg
in thread using system() and putting results into an array by lasagnashoe

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.