Doing map { chomp; lc } <>; generates a "Useless use of lc in void context ..." error, lc $_ seems to solve that. You could avoid reading the whole file by explicitly doing a scalar <> twice.

$ cat zzzz
AAAA
BBBB
CCCC
DDDD
EEEE
$ perl -e '
> ( $dg, $vo ) = map { map { chomp; lc $_ } scalar <> } 1 .. 2;
> print qq{$dg, $vo\n};
> print q{-} x 15, qq{\n};
> print for <>;' zzzz
aaaa, bbbb
---------------
CCCC
DDDD
EEEE
$

[download]

I hope this is of interest.

Cheers,

JohnGG

Update: As ikegami points out, the warning I saw seems to be a figment of my imagination. Please ignore that part of the post.

In reply to Re^2: diamond operator multiple input by johngg
in thread diamond operator multiple input by mikejones

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