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Baggy.pm
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Baggy.pm
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my role Baggy does QuantHash {
has %!elems; # key.WHICH => (key,value)
method BUILD (:%!elems) {}
method default(--> Int) { 0 }
method keys { %!elems.values.map( {.key} ) }
method values { %!elems.values.map( {.value} ) }
method kv { %!elems.values.map( {.key, .value} ) }
method elems(--> Int) { %!elems.elems }
method total(--> Int) { [+] self.values }
method exists ($k --> Bool) { # is DEPRECATED doesn't work in settings
DEPRECATED("the :exists adverb");
self.exists_key($k);
}
method exists_key($k --> Bool) {
%!elems.exists_key($k.WHICH);
}
method Bool { %!elems.Bool }
method hash(--> Hash) { %!elems.values.hash }
method invert(--> List) { %!elems.values.map: { ( .value => .key ) } }
method new(*@args --> Baggy) {
my %e;
# need explicit signature because of #119609
-> $_ { (%e{$_.WHICH} //= ($_ => 0)).value++ } for @args;
self.bless(:elems(%e));
}
method new-fp(*@pairs --> Baggy) {
my %e;
for @pairs {
when Pair {
(%e{$_.key.WHICH} //= ($_.key => 0)).value += $_.value.Int;
}
default {
(%e{$_.WHICH} //= ($_ => 0)).value++;
}
}
my @toolow;
for %e -> $p {
my $pair := $p.value;
@toolow.push( $pair.key ) if $pair.value < 0;
%e.delete_key($p.key) if $pair.value <= 0;
}
fail "Found negative values for {@toolow} in {self.^name}" if @toolow;
self.bless(:elems(%e));
}
method ACCEPTS($other) {
self.defined
?? $other (<+) self && self (<+) $other
!! $other.^does(self);
}
multi method Str(Baggy:D $ : --> Str) {
~ %!elems.values.map( {
.value == 1 ?? .key.gist !! "{.key.gist}({.value})"
} );
}
multi method gist(Baggy:D $ : --> Str) {
my $name := self.^name;
( $name eq 'Bag' ?? 'bag' !! "$name.new" )
~ '('
~ %!elems.values.map( {
.value == 1 ?? .key.gist !! "{.key.gist}({.value})"
} ).join(', ')
~ ')';
}
multi method perl(Baggy:D $ : --> Str) {
'('
~ %!elems.values.map( {"{.key.perl}=>{.value}"} ).join(',')
~ ").{self.^name}"
}
method list() { self.keys }
method pairs() { %!elems.values }
method grab ($count = 1) {
my @grab = ROLLPICKGRAB(self, $count, %!elems.values);
%!elems{ @grab.map({.WHICH}).grep: { %!elems{$_}.value == 0 } }:delete;
@grab;
}
method grabpairs($count = 1) {
(%!elems{ %!elems.keys.pick($count) }:delete).list;
}
method pick ($count = 1) {
ROLLPICKGRAB(self, $count, %!elems.values.map: { (.key => .value) });
}
method pickpairs ($count = 1) {
(%!elems{ %!elems.keys.pick($count) }).list;
}
method roll ($count = 1) {
ROLLPICKGRAB(self, $count, %!elems.values, :keep);
}
sub ROLLPICKGRAB ($self, $count, @pairs is rw, :$keep) is hidden_from_backtrace {
my $total = $self.total;
my $todo = $count ~~ Num
?? $total min $count
!! ($count ~~ Whatever ?? ( $keep ?? $Inf !! $total ) !! $count);
map {
my $rand = $total.rand.Int;
my $seen = 0;
my $selected;
for @pairs -> $pair {
next if ( $seen += $pair.value ) <= $rand;
$selected = $pair.key;
last if $keep;
$pair.value--;
$total--;
last;
}
$selected;
}, 1 .. $todo;
}
proto method classify-list(|) { * }
multi method classify-list( &test, *@list ) {
fail 'Cannot .classify an infinite list' if @list.infinite;
if @list {
# multi-level classify
if test(@list[0]) ~~ List {
for @list -> $l {
my @keys = test($l);
my $last := @keys.pop;
my $bag = self;
$bag = $bag{$_} //= self.new for @keys;
$bag{$last}++;
}
}
# just a simple classify
else {
self{test $_}++ for @list;
}
}
self;
}
multi method classify-list( %test, *@list ) {
samewith( { %test{$^a} }, @list );
}
multi method classify-list( @test, *@list ) {
samewith( { @test[$^a] }, @list );
}
proto method categorize-list(|) { * }
multi method categorize-list( &test, *@list ) {
fail 'Cannot .categorize an infinite list' if @list.infinite;
if @list {
# multi-level categorize
if test(@list[0])[0] ~~ List {
for @list -> $l {
for test($l) -> $k {
my @keys = @($k);
my $last := @keys.pop;
my $bag = self;
$bag = $bag{$_} //= self.new for @keys;
$bag{$last}++;
}
}
}
# just a simple categorize
else {
for @list -> $l {
self{$_}++ for test($l);
}
}
}
self;
}
multi method categorize-list( %test, *@list ) {
samewith( { %test{$^a} }, @list );
}
multi method categorize-list( @test, *@list ) {
samewith( { @test[$^a] }, @list );
}
}