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use SupplyTimeWindow;

my $s = Supplier.new;
my $t = $s.Supply.time-window: 1;

start react whenever $t { .say }
for ^10 -> $i { $s.emit: $i; sleep .5.rand }

SupplyTimeWindow creates time-window() new method on Supplyies that receives the size of the time window in seconds. Every time the original Supply emits, it will emit an Array with each value emitted less than time window's size seconds.

multi method time-window($seconds --> Supply) {...}

It also accepts a optional named parameter transform, it's a Callable that will be used to transform the time window array.

multi method time-window($seconds, :&transform! --> Supply) {...}