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Re^2: hash deref confusion: Intermediate Perl

by tobyink (Canon)
on Jul 30, 2012 at 07:03 UTC ( #984370=note: print w/replies, xml ) Need Help??


in reply to Re: hash deref confusion: Intermediate Perl
in thread hash deref confusion: Intermediate Perl

I wouldn't really say it's a quirk. You're assigning a list of values to a list of hash slots, so the @ sigil is quite appropriate.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

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Re^3: hash deref confusion: Intermediate Perl
by Anonymous Monk on Jul 30, 2012 at 08:13 UTC

    I wouldn't really say it's a quirk. You're assigning a list of values to a list of hash slots, so the @ sigil is quite appropriate.

    Sure, from that perspective it makes sense, but IIRC TheLarry himself called this a mistake, its why perl6 always calls a %hash a  %hash{$key} not  $hash{$key}

      That's not specific to slices though. In Perl 6 sigils are not context-dependent; they are variable-dependent and context-invariant. In Perl 5, where sigils are used to indicate context, using @ for hash slices is pretty consistent with the rest of the language.

      perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

        .... using @ for hash slices is pretty consistent with the rest of the language

        It is, but its still quirky, look, there is a list on the right side:

        %hash = @list;

        @list = %hash;

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