head

code

item

root

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

README

Manifesto - Make a supply of the results of Promises


=begin code

use Manifesto;

my $manifesto = Manifesto.new;

for (^10).pick(*).map( -> $i { Promise.in($i + 0.5).then({ $i })}) -> $p {
    $manifesto.add-promise($p);
}

my $channel = Channel.new;

react {
    whenever $manifesto -> $v {
        $channel.send: $v;
    }
    whenever $manifesto.empty {
        $channel.close;
        done;
    }
}

say $channel.list;

=end code


This manages a collection of Promise objects and provides a Supply
of the result of the kept Promises.


This is useful to aggregate a number of Promises to a single stream
of results, which may then be used in, a C<react> or C<supply> block
or othewise tapped.


This returns the Supply on which will be emited the results of the
kept managed Promises, (it is named C<Supply> so the Manifesto object
can be 'coerced' into a Supply in for instance a C<whenever>.


method add-promise(Promise $promise) returns Bool


This adds a Promise to be managed by this object, it will return True if
the Promise was successfully added, it will not be added if it is not in
state C<Planned>.


This returns a Supply which will emit an event (with the value of True,)
whenever the list of C<Planned> Promises is exhausted.


This returns a Supply onto which the exceptions from broken Promises are
emitted.


method promises() returns Array[Promise]


This is a list of the Promises that are yet to be kept, when they are kept
(or broken,) then they will be removed.



class Manifesto {
    has Supplier $!supplier;
    has Promise  %!promises;

    has Supplier $!empty;
    has Supplier $!exception;

    has Lock $!promises-lock;



    submethod TWEAK() {
        $!supplier  = Supplier.new;
        $!empty     = Supplier.new;
        $!exception = Supplier.new;
        $!promises-lock = Lock.new;
    }

    method Supply( --> Supply ) {
        $!supplier.Supply;
    }

    method add-promise(Promise() $promise --> Bool ) {
        my Bool $rc;
        my $which = $promise.WHICH;
        if  $promise.status ~~ Planned {
            $promise.then(sub ($p ) {
                CATCH {
                    default {
                        $!exception.emit: $_;
                    }
                }
                $!supplier.emit: $p.result;
                $p;
            }).then( {
                $!promises-lock.protect({
                    %!promises{$which}:delete;
                    if %!promises.keys.elems == 0 {
                        $!empty.emit: True;
                    }
                });
            });
            $!promises-lock.protect({
                %!promises{$which} = $promise;
            });
            $rc = True;
        }
        $rc;
    }

    method empty( --> Supply ) {
        $!empty.Supply;
    }

    method exception( --> Supply ) {
        $!exception.Supply;
    }

    method promises() {
        %!promises.values;
    }
}
# vim: expandtab shiftwidth=4 ft=raku


Manifesto

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


README

Claim to stop the war

Add your claim

Show the manifest

License information

Contributor

Credits

Afterword

Manifest::StopWar v0.0.1

Authors

License

Dependencies

Test Dependencies

Provides

Documentation