in reply to Re^6: use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20 (*)
in thread use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20

it is a syntax error.

Depends on your version of Perl. It's called a index-value slice. It returns key,val,key,val,...

And the rest of the post is a straw man.

Showing that sigils don't indicate the type of value returned is not a straw many to disproving that sigils indicate the type of the value returned.

  • Comment on Re^7: use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20 (*)

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Re^8: use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20 (*)
by BrowserUk (Patriarch) on Dec 01, 2013 at 18:49 UTC
    it is a syntax error.

    Depends on your version of Perl. It's called a index-value slice. It returns key,val,key,val,...

    Really? In which release of perl did that work then?: 

    C:\test>\perl5.18\bin\perl -E"my %h=1..10; my $r = \%h; print %{ $r }[
+ 1,2 ];"
syntax error at -e line 1, near "}["
Execution of -e aborted due to compilation errors.

C:\test>\perl5.18\bin\perl -E"my @a=1..10; my $r = \@a; print %{ $r }[
+ 1,2 ];"
syntax error at -e line 1, near "}["
Execution of -e aborted due to compilation errors.

    [download]

    Or is this a preview of Yet Another Mis-Feature that'll have to be deprecated in a year or so?

    It will be sad indeed to see Perl die as a result of self-inflicted injuries.

    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.
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      Perl 5.19.4 and above. With hashes it seems fairly useful...

      sub new {
   my ($class, %args) = @_;
   my $self = { %args{"foo", "bar", "baz"} };
   bless $self, $class;
}

      [download]

      Used on arrays, a la %arr[1,2,3] it seems less so.

      See also

      use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name
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