in reply to looking for a perl way to build a hash

Dirty golfer 
my $str1="a,b,c";
my $str2="1,2,3";
@h{eval$str1}=eval$str2

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Don't do that, see other replies!
English is not my mother tongue.
Les tongues de ma mère sont "made in France".

In Section Seekers of Perl Wisdom