They're both incorrect. If you'd use warnings you'd get a warning from the first construct.

$hash{$id} = (1,2,3); will set $hash{$id} = 3 (the last element in the list).

and $hash{$id} = @temp; will set $hash{$id} = 3 (the length of @temp).

You cannot literally make a hash with arrays as the values in Perl, you need array-references: 

$hash{$id} = [1,2,3]; # [ ... ] creates an anonymous array ref
@temp = (1,2,3);
$hash{$id} = \@temp; # \ makes an explicit reference to @temp

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Note that \(1,2,3) will make a list of references to 1, 2 and 3, so don't use that.

If you want to read one of the values from the array ref you do: 

$x = ${$hash{$id}}[0];
# or
$x = $hash{$id}[0];
# or
$x = $hash{$id}->[0];

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I like the last syntax best, because it makes it clear that there is a reference (more or less equivalent to a "pointer" in C speak) involved.

If you want to whole list of values from the array, you can do: 

my @values = @{$hash{$id}};

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perlref has a lot of info about this.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Regarding Hashes of Arrays by Joost
in thread Regarding Hashes of Arrays by Anonymous Monk

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