#!/usr/bin/perl

# http://perlmonks.org/?node_id=1169870

use strict;
use warnings;

$_ = <<END;
sid  1|FLPSDFFPS LLWFHISCL
sid  1|WIRTPPAYR YVNVNMGLK
sid  2|FLPSDFFPS LLWFHISCL
sid  2|FLPSDFFPS ELMNLATWV
sid  7|FLPSDFFPS ATVELLSFL
sid  7|VWIRTPPAY LLSFLPSDF
sid  9|VWIRTPPAY LLDTASALY
sid  9|FGRETVLEY PSDFFPSVR
END

s/^(sid\s+\d+\|).*\K\n\1/ /gm;

print;

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In reply to Re: concatenating elements of an array in twos by Anonymous Monk
in thread concatenating elements of an array in twos by Sandy_Bio_Perl

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