Use for questions about the Perl 6 Junction type.
Perl 6 Junctions are a type of value that can represent multiple states at the same time. It collapses to a single Boolean value in tests.
Questions tagged [perl6-junction]
5 questions
13
votes
1 answer
Double junction arguments swapping sides
I'm confused about how double junctions are supposed to work.
This makes some sense:
say all('a', 'b', 'c') ~ any('d', 'e');
gives
all(any(ad, ae), any(bd, be), any(cd, ce))
This doesn't make sense:
say any('a', 'b', 'c') ~ all('d',…
Kegan Thorrez
- 133
- 6
9
votes
2 answers
Why do + and ~ affect Perl 6 junctions differently?
Add one to a junction of Ints:
put any( 1, 3, 7 ) + 1;
Now you have a junction of those Ints increased by one:
any(2, 4, 8)
So, 2 == any(2, 4, 8) is true.
Make a junction of strings and append to those strings:
put any( ) ~ 'amadryas';
You…
brian d foy
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8
votes
1 answer
Where is contains( Junction) defined?
This code works:
(3,6...66).contains( 9|21 ).say # OUTPUT: «any(True, True)»
And returns a Junction. It's also tested, but not documented.
The problem is I can't find its implementation anywhere. The Str code, which is also called from Cool,…
jjmerelo
- 22,578
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7
votes
1 answer
Can gather be used to unroll Junctions?
In this program:
use v6;
my $j = +any "33", "42", "2.1";
gather for $j -> $e {
say $e;
} # prints 33422.1
for $j -> $e {
say $e; # prints any(33, 42, 2.1)
}
How does gather in front of forchange the behavior of the Junction, allowing to…
jjmerelo
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- 86
7
votes
1 answer
In Perl 6, how can I replicate the behavior of Perl's List::Util::all?
I am trying to use a Junction to replicate behavior I am used to in Perl from List::Util::all.
I am using the all junction in the following statement:
# does not work
return not know(@possible-dates) and not know tell day all(@possible-dates);
not…
Hunter McMillen
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