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Re: Perl 6, defining a hash with interpolated string

by molecules (Monk)
on Aug 04, 2010 at 17:43 UTC ( #852927=note: print w/ replies, xml ) Need Help??


in reply to Perl 6, defining a hash with interpolated string

I'm not really sure, but it seems that the colon is effectively ignored in that context. Try the following:

use v6; my $item = :[:[:[$hkey]]]; say $item.perl; # outputs [[["somekey"]]]


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Re^2: Perl 6, defining a hash with interpolated string
by Mr_Micawber (Beadle) on Aug 04, 2010 at 19:12 UTC

    I think I was looking for the interpolating analog of this model for specifying a literal hash pair:

    %kv = :LiteralKey<LiteralValue>
      The last two of the following examples give you interpolation, but it is more of the "normal" interpolation you would expect in Perl.
      use v6; my %kv1 = :LiteralKey<LiteralValue>; say :%kv1.perl; my %kv2 = <LiteralKey>,<LiteralValue>; say :%kv2.perl; my $var3 = 'Literal'; my %kv3 = "{$var3}key",'LiteralValue'; say :%kv3.perl; my $var4 = 'LiteralKey'; my %kv4 = "$var4",'LiteralValue'; say :%kv4.perl;
      gives you
      "kv1" => {"LiteralKey" => "LiteralValue"} "kv2" => {"LiteralKey" => "LiteralValue"} "kv3" => {"Literalkey" => "LiteralValue"} "kv4" => {"LiteralKey" => "LiteralValue"}

        I noticed playing with this code that the output of .perl differs depending on if the colon is in front of the variable:

        say :%kv4.perl; #"kv1" => {"LiteralKey" => "LiteralValue"} say %kv4.perl; #{"LiteralKey" => "LiteralValue"}

        the colon seems to be plucking the Hash's name and creating a Pair with it.

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