HH\ImmVector::fromKeysOf

Creates an ImmVector from the keys of the specified container

public static function fromKeysOf<Tk as arraykey>(
  ?KeyedContainer<Tk, mixed> $container,
): ImmVector<Tk>;

Every key in the provided KeyedContainer will appear sequentially in the returned ImmVector, with the next available integer key assigned to each.

Parameters

• ?KeyedContainer<Tk,mixed> $container - The container with the keys used to create the current ImmVector.

Returns

• ImmVector<Tk> - An ImmVector built from the keys of the specified container.

Examples

See [Vector::fromKeysOf](</hack/reference/class/Vector/fromKeysOf/#examples>) for usage examples.