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As MidLifeXis points out, you need to chomp your newlines.

$ perl -E ' > open my $fa, q{<}, \ <<EOF1 or die $!; > file A line 1 > file A line 2 > EOF1 > > open my $fb, q{<}, \ <<EOF2 or die $!; > file B line 1 > file B line 2 > EOF2 > > say join q{,}, > map { chomp; $_ } scalar <$fa>, scalar <$fb>;' file A line 1,file B line 1 $

I hope this is helpful.

Update: A more complete example putting the $fa, $fb and $fc filehandles in an array and showing how you might cope if they contain fewer lines than $fi using eof.

$ perl -Mstrict -Mwarnings -E ' > open my $fi, q{<}, \ <<EOFi or die $!; > File I Line 1 > File I Line 2 > File I line 3 > EOFi > > open my $fa, q{<}, \ <<EOFa or die $!; > File A Line 1 > File A Line 2 > EOFa > > open my $fb, q{<}, \ <<EOFb or die $!; > File B Line 1 > File B Line 2 > File B Line 3 > EOFb > > open my $fc, q{<}, \ <<EOFc or die $!; > File C Line 1 > File C Line 2 > File C Line 3 > File C Line 4 > EOFc > > my @slaveFHs = ( $fa, $fb, $fc ); > while ( <$fi> ) > { > chomp; > say join q{,}, $_, > map { chomp; $_ } > map { eof $_ ? q{--eof--} : scalar <$_> } > @slaveFHs; > }' File I Line 1,File A Line 1,File B Line 1,File C Line 1 File I Line 2,File A Line 2,File B Line 2,File C Line 2 File I line 3,--eof--,File B Line 3,File C Line 3



In reply to Re: Scalar function by johngg
in thread Scalar function by gon770

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    [hippo]: Can anybody suggest a scalar value of $x for which ($x && !length $x) is true?
    [Corion]: hippo: If you have a Unicode-wise Perl then likely some zero-width characters in $x would work. Maybe $x = "\x{200b}" works.
    [Corion]: Hmm - no, that outputs 1 for me on 5.14 - perl -wle "my $x = qq(\x{200b}); warn $x; warn length $x"
    [hippo]: Smart - I'll give that a go. Thanks.
    [hippo]: Ah

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