perl6

In Python, I can splice string like this: solo = A quick brown fox jump over the lazy dog solo[3:5] I know substr and comb is enough, I want to know if it's possible, However. Should I use a role to do this? How to slice a string Strings (represented as class Str ) are seen as single values and not positional data structures in Perl 6, and thus can't be indexed/sliced with the built-in [ ] array indexing operator. As you already suggested, comb or substr is the way to go: my $solo = "A quick brown fox jumps over the lazy dog"; dd $solo.comb[3..4].join; # "ui" dd $solo.comb[3..^5].join; # "ui"

Binder project looks promising. It helps in executing notebooks in a github repository by building an executable container. I am trying to build an executable container in binder with the following Dockerfile that has Perl 6 and Python 3 kernels: FROM sumdoc/perl-6 ENV NB_USER jovyan ENV NB_UID 1000 ENV HOME /home/${NB_USER} RUN adduser --disabled-password \ --gecos "Default user" \ --uid ${NB_UID} \ ${NB_USER} RUN apt-get update \ && apt-get install -y build-essential \ git wget libzmq3-dev ca-certificates python3-pip \ && rm -rf /var/lib/apt/lists/* && pip3 install jupyter notebook --no

Is there a way to start the Perl 6 REPL with definitions loaded from a file? I.e. let's say I have this in test.p6 : sub abc() { say 123; } I'd like to be able to start the perl6 REPL and load that file so that I can use abc interactively. I guess the easiest way would be to put your code in a .pm6 file, e.g. ./Foo.pm6 , mark the subroutines in question with is export and then start Rakudo Perl 6 like this: $ perl6 -I. -MFoo To exit type 'exit' or '^D' > abc 123 来源： https://stackoverflow.com/questions/45290418/start-repl-with-definitions-loaded-from-file

What is the best option to parse a binary structure with Perl6 . in Perl5 we have the pack/unpack methods on Perl6 they seems experimental is it possible to use Perl6 grammar to parse binary data let's say i have a file which have records on the following binary format : struct record { short int ut_type; char ut_line[UT_LINESIZE]; char ut_id[4]; char ut_user[UT_NAMESIZE]; char ut_host[UT_HOSTSIZE]; } is it possible to parse this file with Perl6 grammar ? What is the best option to parse a binary structure with Perl6? Especially given that you know about P5's pack/unpack, the new P5pack module

A continuation of this question , and probably an even more weird one. Can I e.g. concatenate two regexes using a sub ? (Of course, I understand, how to do it with a regex ) The following code is totally wrong, but I hope it can explain what I want to do: my Regex sub s12 ( $c, $v) { return / <{$c}> <{$v}> / } my regex consonant { <[a .. z] -[aeiou]> } my regex vowel { <[aeiou]> } my regex open_syllable { &s12( &consonant, &vowel ) } "bac" ~~ m:g/ <open_syllable> /; say $/; # should be 'ba' What you wrote is basically right, but you need to tweak the syntax a little. First, you should declare

I have a name which I'd like to give to a variable, in another string variable: my $name = '$a'; or simply my $name = 'a'; How to make the variable and to use it? I mean something like this (but it doesn't work): my $name = '$a'; my {$name} = 1; # Doesn't work say $a; # should be 1 A more general case. I have a list of variable names, say my @names = '$aa' ... '$cc'; How to declare and use the variable, whose name will be e.g. @names[2] ? According to documentation the lexical pad (symbol table) is immutable after compile time. Also (according to the same docs) it means EVAL cannot be used to