Skip to main content

isEmpty

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.

Is the collection empty?

public function isEmpty(): bool;

Returns​

  • bool - Returns true if the collection is empty; false otherswise.