HH\ImmSet::lazy

Returns a lazy, access elements only when needed view of the current ImmSet

public function lazy(): HH\Rx\KeyedIterable<arraykey, Tv>;

Normally, memory is allocated for all of the elements of an ImmSet. With a lazy view, memory is allocated for an element only when needed or used in a calculation like in map() or filter().

Return Values

  • HH\Rx\KeyedIterable<arraykey, Tv> - an KeyedIterable representing the lazy view into the current ImmSet, where the keys are the same as the values.