Hi Monks,

I'm trying to use hash slices, but I get a warning saying Scalar value @foo{qw#a b#} better written as $foo{qw#a b#} at -e line 1. - but I don't want a scalar value!

This works OK:

geedorah:/home/wstest# perl -E '$foo{a}=1; $foo{b}=2; say join",", @fo
+o{qw#a b#}'
1,2

[download]

But with warnings:

geedorah:/home/wstest# perl -wE '$foo{a}=1; $foo{b}=2; say join",", @f
+oo{qw#a b#}'
Scalar value @foo{qw#a b#} better written as $foo{qw#a b#} at -e line 
+1.
1,2

[download]

But if I take perl's advice, it (unsurprisingly) doesn't work:

geedorah:/home/wstest# perl -wE '$foo{a}=1; $foo{b}=2; say join",", $f
+oo{qw#a b#}'
Use of uninitialized value within %foo in join or string at -e line 1.

[download]

Thanks,

Pete

geedorah:/home/wstest# cat /etc/debian_version 
6.0.1

geedorah:/home/wstest# perl --version
This is perl, v5.10.1 (*) built for i486-linux-gnu-thread-multi
(with 51 registered patches, see perl -V for more detail)

Copyright 1987-2009, Larry Wall

Perl may be copied only under the terms of either the Artistic License
+ or the
GNU General Public License, which may be found in the Perl 5 source ki
+t.

Complete documentation for Perl, including FAQ lists, should be found 
+on
this system using "man perl" or "perldoc perl".  If you have access to
+ the
Internet, point your browser at http://www.perl.org/, the Perl Home Pa
+ge.

geedorah:/home/wstest#

[download]

In reply to Incorrect warning when using hash slices? by flipper

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