raku

问题 Is the a way to use Perl 5 modules from CPAN from Rakudo Perl 6? For example, how can I use the venerable Perl 5 module, CGI, which hasn't been ported yet, in Perl 6. Update: And what this funky code from some early Perl 6 module: use CGI:from<perl5>; Is the :from<perl5> directive used to evoke some kind of a Perl 5 compatibility layer? Can't seem to find any documentation about it. 回答1: Use Inline::Perl5. The following example shows how to use the CPAN hosted Perl 5 module Text::Unidecode (

问题 Parrot is the virtual machine originally designed for Perl 6. What technical capabilities does the Parrot VM offer that competing virtual machines such as the Java Virtual Machine (JVM)/Hotspot VM and Common Language Runtime (CLR) lack? 回答1: The following answer was written in 2009. See also this 2015 update by raiph. To expand on @Reed and point out some highlights, Parrot's opcodes are at a far higher level than most virtual machines. For example, while most machines store integers and

问题 Parrot is the virtual machine originally designed for Perl 6. What technical capabilities does the Parrot VM offer that competing virtual machines such as the Java Virtual Machine (JVM)/Hotspot VM and Common Language Runtime (CLR) lack? 回答1: The following answer was written in 2009. See also this 2015 update by raiph. To expand on @Reed and point out some highlights, Parrot's opcodes are at a far higher level than most virtual machines. For example, while most machines store integers and

问题 Perl 6 seems to have an explosion of equality operators. What is =:= ? What's the difference between leg and cmp ? Or eqv and === ? Does anyone have a good summary? 回答1: =:= tests if two containers (variables or items of arrays or hashes) are aliased, ie if one changes, does the other change as well? my $x; my @a = 1, 2, 3; # $x =:= @a[0] is false $x := @a[0]; # now $x == 1, and $x =:= @a[0] is true $x = 4; # now @a is 4, 2, 3 As for the others: === tests if two references point to the same

问题 I am new to Perl 6. I have the following code in my Atom Editor, but I still don't understand how this works. I copied the following code, as the docs.raku.org said, but it seems that it does not work. So I changed the code to this: use v6; class HTTPHeader { ... } class HTTPHeader does Associative { has %!fields handles <self.AT-KEY self.EXISTS-KEY self.DELETE-KEY self.push list kv keys values>; method Str { say self.hash.fmt; } multi method EXISTS-KEY ($key) { %!fields{normalize-key $key}

问题 I know that perl6 will definetely allow importing perl5 code but I'm not able to do this. Here is perl6 code use perl5:Net::FTP; It reports an error Is there any configuration issue or it is not ready yet? 回答1: Use Inline::Perl5 to embed arbitrary Perl code in Raku or use Perl libraries as if they were Raku libraries. Inline::Perl5 appropriately packages and wraps a regular perl interpreter in MoarVM so that Rakudo can interop with Perl. The combination already supports: use ing Perl modules,

问题 I'm trying to import a Perl5 module I really like https://metacpan.org/pod/Data::Printer using advice from the manual page https://modules.perl6.org/dist/Inline::Perl5:cpan:NINE using a very simple script use Inline::Perl5; my $p5 = Inline::Perl5.new; $p5.use('Data::Printer'); but then I get this error: Unsupported type NativeCall::Types::Pointer<94774650480224> in p5_to_p6 in method p5_to_p6_type at /usr/lib/perl6/site/sources/130449F27E85303EEC9A19017246A5ED249F99E4 (Inline::Perl5) line 298

问题 I'm trying to import a Perl5 module I really like https://metacpan.org/pod/Data::Printer using advice from the manual page https://modules.perl6.org/dist/Inline::Perl5:cpan:NINE using a very simple script use Inline::Perl5; my $p5 = Inline::Perl5.new; $p5.use('Data::Printer'); but then I get this error: Unsupported type NativeCall::Types::Pointer<94774650480224> in p5_to_p6 in method p5_to_p6_type at /usr/lib/perl6/site/sources/130449F27E85303EEC9A19017246A5ED249F99E4 (Inline::Perl5) line 298

问题 I want to do something like this: die "Fatal error: application version $MY-APPLICATION-VERSION" Since a Perl6 module cannot assume the relative locations of files it was packaged with (for instance installed modules are all put into a flat directory structure) I can't just do $?FILE.IO.add("../META6.json").slurp . Is there a way to get the version declared in META6.json in a Perl6 app/module that may or may not be installed? 回答1: As of rakudo v2019.03 modules may access the Distribution

问题 I want to do something like this: die "Fatal error: application version $MY-APPLICATION-VERSION" Since a Perl6 module cannot assume the relative locations of files it was packaged with (for instance installed modules are all put into a flat directory structure) I can't just do $?FILE.IO.add("../META6.json").slurp . Is there a way to get the version declared in META6.json in a Perl6 app/module that may or may not be installed? 回答1: As of rakudo v2019.03 modules may access the Distribution