In sample code for Tk::MatchEntry there is code similar to this fragment:

my @choices = [qw/one two three four/];
my $me = $mw->MatchEntry(-choices => @choices);

[download]

However this also works:

my @choices = (qw/one two three four/);
my $me = $mw->MatchEntry(-choices => \@choices);

[download]

as does this:

my $choices = [qw/one two three four/];
my $me = $mw->MatchEntry(-choices => \@$choices);

[download]

While I think I understand what the last two variants are doing, I'm a little fuzzy on the first one - is it assigning an anonymous array to element 0 of @choices, or is something else going on? Is there any significant difference between each of the techniques?

Perl is Huffman encoded by design.

In reply to Passing arrays and references to arrays by GrandFather

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