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Re: Perl 6, arrays, hashes, subroutines & basic file IO

by Anonymous Monk
on Oct 15, 2013 at 19:50 UTC ( #1058349=perlquestion: print w/ replies, xml ) Need Help??
Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

I am wondering if you can help me a bit on output data to a file. Here is my code:
use v6;
my $aa = ;
my $peplen = 4;
.print for
X('>', $aa xx $peplen);
my $filename = "amino_acid.txt";
my $op = open $filename, :a;
$op.print for X('>', $aa xx $peplen);
$op.close;

I can see the result on my command prompt, but can't see anything on my text file. Any help or suggestions will be greatly appreciated it. Thank you!!

Comment on Re: Perl 6, arrays, hashes, subroutines & basic file IO
Re^2: Perl 6, arrays, hashes, subroutines & basic file IO
by raiph (Friar) on Oct 16, 2013 at 15:44 UTC
    If you really want to contribute to development of Perl 6 (as opposed to development with Perl 6) for the next couple years, then fantastic -- welcome aboard!

    If you just want to use Perl to get stuff done then I strongly recommend you try to use Perl 5 instead. Perl 5 is considered by many to be a great tool for bioinformatics. In contrast Perl 6 is immature in many regards including not yet being able to use most Perl 5 code including almost all of the critically important CPAN.

    This site (PerlMonks) is almost entirely about Perl 5. You're in the right place if your focus is using or developing Perl 5. In contrast, for now, Perl 6 users and developers are generally better off visiting the IRC channel #perl6 on freenode.

    On #perl6 you'll find p6 experts happy to help beginners most hours of the day. Start by verifying that you have an up to date Perl 6 (#perl6ers will show you how to check) and then explain to #perl6 what you want to do with Perl 6 long term and what you are trying to do with the code you've quoted.


    In case it helps I'll cover a couple things here at PerlMonks. Running your code as it is with a current Rakudo Perl 6 errors out with:

    SORRY!
    ===
    Error while compiling
    Malformed initializer at ------> $aa = ;
    

    Fixing that and recompiling gives:

    invoke() not implemented in class 'X'
    

    So, what is X? To see the gist of something use .gist:

    .print for X.gist
    

    which returns:

    (X)
    

    This is the gist of package X i.e. not what you meant. So, time to visit #perl6. :)

    Hth.

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