#! /usr/bin/perl

use strict;
use warnings;

my $id_file = '/path/to/file/with/ids.txt';
my $fasta_file = '/path/of/fasta/file.fasta';

open(my $fh, "<$id_file") or die $!;
my @ids = <$fh>;
close $fh;

{
  local $/ = "\n>";
  open(my $fh, "<$fasta_file") or die $!;
  while(my $entry = <$fh>){
    print $entry if(grep{$entry =~ /\Q$_\E/}@ids);
  }
}

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In reply to Re: pattern matching and array comparison by reneeb
in thread pattern matching and array comparison by Anonymous Monk

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