HH\ImmVector::lazy

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

Description

public function lazy(): KeyedIterable<int,Tv>

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

Normally, memory is allocated for all of the elements of an ImmVector. 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

Examples

See Vector::lazy for usage examples.