TITLE

AUTHOR

code

=begin code :lang<raku>
#!/usr/bin/env perl6



use v6;

my $tempfile = open('output.txt', :w);
$tempfile.print("Hello world\n");
$tempfile.close;

# vim: expandtab shiftwidth=4 ft=perl6

=end code


root

Reading from a file


01-read-from-file.pl

Reading from the terminal


01-read-from-terminal.pl

Word-wrap paragraphs to a given length


01-word-wrap.pl

Lazily evaluate items in a list


lazy-evaluation.pl

para

L<Examples| file:../examples/index.podlite>


L<Download |file:../download/index.podlite>


React

=begin React :component<HeaderCol> :id<menu> 
=para L<Documentation|/doc/introduction>
=para L<Modules| /mods>
=para L<Examples| file:../examples/index.podlite>
=para L<Download |file:../download/index.podlite>
=para L<About|file:../about/index.podlite>
=para 🔍 K<⌘K>/K<ctrl-K>
=end React


HEADER

FOOTER

Write to a file


=begin code :lang<raku>
#!/usr/bin/env perl6

use v6;



my @fibonacci = 1, 1, { $^a + $^b } ... *;
say @fibonacci[6];     # 13

# vim: expandtab shiftwidth=4 ft=perl6

=end code


01-write-to-file.pl

Uses a minimum number of lines algorithm based upon
L<https://en.wikipedia.org/wiki/Line_wrap_and_word_wrap#Minimum_number_of_lines>.


=begin code :lang<raku>
use v6;



sub MAIN($input-file = $*SPEC.catdir($*PROGRAM-NAME.IO.dirname, "lorem.txt")) {
    for $input-file.IO.lines {
        print-wrapped(.words);
    }
}

my $space-width = 1;  # width of a space character

# Print words, new line at word wrap, new line for paragraph
sub print-wrapped (@words, $line-width = 60) {
    my $space-remaining = $line-width;
    my @words-in-line;
    for @words -> $word {
        my $word-length = $word.chars;
        if $word-length + $space-width > $space-remaining {
            @words-in-line.join(" ").say;
            $space-remaining = $line-width - $word-length;
            @words-in-line = ($word);
        }
        else {
            @words-in-line.push($word);
            $space-remaining = $space-remaining - ($word-length + $space-width);
        }
    }
    @words-in-line.join(" ").say;
}

# vim: expandtab shiftwidth=4 ft=perl6

=end code


The Raku Knowledge Base


=begin React :component<HeaderCol> :id<footer>  
=begin nested :!nested
=item1 B<Language>
    =item2 L<Get started|file:../getting-started/getting-started.podlite>
    =item2 L<Why Raku?|/doc/language/faq#Why-should-I-learn-Raku-What's-so-great-about-it>
    =item2 L<Try Raku|https://glot.io/new/raku>
    =item2 L<Raku cheat sheet|https://github.com/Raku/mu/blob/master/docs/Perl6/Cheatsheet/cheatsheet.txt>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<Raku on Exercism|https://exercism.org/tracks/raku>
    =item2 L<Wikipedia|https://en.wikipedia.org/wiki/Raku_(programming_language)>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=begin nested :!nested

=item1 B<L<Documentation|/doc>>
    =item2 L<Getting started, Migration guides from other languages, & Tutorials | file:../doc/introduction.podlite>
    =item2 L<Language References|file:../doc/reference.podlite>
    =item2 L<Type Reference| file:../doc/types.podlite>
    =item2 L<Miscellaneous| file:../doc/miscellaneous.podlite>
    =item2 L<FAQs (Frequently Asked Questions)|/doc/language/faq>
    =item2 L<Community|/doc/language/community>
    =item2 L<The list of all documents|file:../doc/index.podlite>

=item1 B<Resources>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>

=end nested
=begin nested :!nested

=item1 B<Resoures>
    =item2 L<Download | file:../download/index.podlite>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=item1 B<Learning>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Wikibook |https://en.wikibooks.org/wiki/Raku_Programming>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>
    =item2 L<Learn Raku in Y minutes|https://learnxinyminutes.com/docs/raku/>
    =item2 L<Golfing |https://github.com/AlexDaniel/raku-golf-cheatsheet>
=end nested
=begin nested :!nested

=item1 B<Explore>
    =item2 L<Raku Blog Aggregator|https://planet.raku.org/>
    =item2 L<Rakudo Weekly|https://rakudoweekly.blog/>
    =item2 L<The Weekly Challenge |https://perlweeklychallenge.org/>
    =item2 L<Raku Advent Calendar|https://raku-advent.blog/>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=end React


=begin React :component<CookieConsent> :id<CookieConsent> :buttonCaption("Got it!")
=para
This website uses cookies for analytics.
=end React


AUTHOR

See Also