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Re: Hash of arrays generation

by SuicideJunkie (Vicar)
on Sep 04, 2012 at 18:17 UTC ( #991673=note: print w/replies, xml ) Need Help??

in reply to Hash of arrays generation

The former will make $HoA{$key} an array ref regardless of what it was before.

The latter will cause problems if $HoA{$key} was something other than an arrayref.

use strict; use warnings; my %HoA; $HoA{'bar'} = 'baz'; @{$HoA{'foo'}} = (1,2,3); @{$HoA{'bar'}} = (1,2,3);
Gives: Can't use string ("baz") as an ARRAY ref while "strict refs" in use at line 6.

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Re^2: Hash of arrays generation
by nemesisgus (Acolyte) on Sep 05, 2012 at 00:31 UTC

    Thank you both for answering.

    I didn't consider the case of an already defined key element. Thanks for pointing it out!

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