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Count

hphp/hack/manual/apis/Classes/HH/ImmSet/count.md

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:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Provides the number of elements in the current ImmSet

Hack
public function count(): int;

Returns

  • int - The number of elements in the current ImmSet.

Examples

See Set::count for usage examples.

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