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Re: use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20

by Anonymous Monk
on Nov 23, 2013 at 10:55 UTC ( #1064024=note: print w/ replies, xml ) Need Help??


in reply to use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20

What, is the second arrow necessary in $r->[1]->@*?


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Re^2: use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20
by Anonymous Monk on Nov 23, 2013 at 11:39 UTC
    I'll translate for you
    my @in = ( 2, 3 ); my @out = ( 1, \@in, 4 ); my $r = \@out; $r = [ 1, [ 2, 3 ], 4 ]; $r->[1]->@*; # equivalent to @{ $r->[1] } # equivalent to @{ $out[1] } # equivalent to @{ \@in }
      or $r->1->flatten
      How does that answers if $r->[1]@* is valid?

        How does that answers if $r->[1]@* is valid?

        It doesn't, it answers only the question I understood  Why is the second arrow necessary in $r->[1]->@*?  

        I've no idea if  $r->[1]@*   I usually don't run development builds of perl

        From the documentation I would guess the answer is no, but the test suite might be more revealing https://metacpan.org/source/SHAY/perl-5.19.5/t/op/postfixderef.t ; short look, looks like answer is no

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