/
Mixy.pm
59 lines (52 loc) · 1.53 KB
/
Mixy.pm
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my role Mixy does Baggy {
method default(--> Real) { 0 }
method total(--> Real) { [+] self.values }
method new-fp(*@pairs --> Mixy) {
my %e;
for @pairs {
when Pair {
(%e{$_.key.WHICH} //= ($_.key => 0)).value += $_.value;
}
default {
(%e{$_.WHICH} //= ($_ => 0)).value++;
}
}
for %e -> $p {
%e.delete_key($p.key) if $p.value.value == 0;
}
self.bless(:elems(%e));
}
multi method gist(Mixy:D $ : --> Str) {
my $name := self.^name;
( $name eq 'Mix' ?? 'mix' !! "$name.new" )
~ '('
# ~ %!elems.values.map( {
~ self.pairs.map( {
.value == 1 ?? .key.gist !! "{.key.gist}({.value})"
} ).join(', ')
~ ')';
}
method grab ($count = 1) {
fail ".grab is not supported on a {.self.^name}";
}
method pick ($count = 1) {
fail ".pick is not supported on a {.self.^name}";
}
method roll ($count = 1) {
my $total = [+] self.values.grep: * > 0;
my $rolls = $count ~~ Num ?? $total min $count !! $count;
# my @pairs := %!elems.values;
my @pairs := self.pairs;
map {
my $rand = $total.rand;
my $seen = 0;
my $roll;
for @pairs -> $pair {
next if ( $seen += $pair.value ) <= $rand;
$roll = $pair.key;
last;
}
$roll;
}, 1 .. $rolls;
}
}