I have this script in which I am trying to clean up the tmp file output and use only arrays and variables. It does work, I created it a while back. 
open my $bpl_fh, '<', '/tmp/bpl.txt' or die $!;
chomp(my @words = <$bpl_fh>);
close $bplist_fh;

my $pattern = join '|', @words;
my @lines;
open my $fh, '<', '/tmp/lst.txt' or die "unable to open file '$file' f
+or reading : $!";
open my $fh2, '>', '/tmp/lst2a.txt' or die "unable to open file '$file
+' for reading : $!";
        while (<$fh>) {
        push @lines, $_ if /$pattern/;
 }
print $fh2 "$_\n" foreach @lines;
close $fh2;

[download]
So I have made bpl and bpout into an arrays but I am unsure of how to write the while statement. I want it to perform the same task as the above script but without using the /tmp/files to read from and output 
chomp(my @words = @bpl);

my $pattern = join '|', @words;

#my @lines;
my $item;


        while (@bpout) {
        my $item = (@bpout);
        push $item, $_ if /$pattern/;

 }
print "$_\n" foreach $item;

[download]
Does anyone have suggestions?

In reply to removing the need for tmp files from script by novice2015

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.