SkipWhile

:::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. :::

Returns an ImmVector containing the values of the current ImmVector starting after and including the first value that produces false when passed to the specified callback

public function skipWhile(
  (function(Tv): bool) $fn,
): ImmVector<Tv>;

That is, skips the continuous prefix of values in the current ImmVector for which the specified callback returns true.

The returned ImmVector will always be a subset (but not necessarily a proper subset) of the current ImmVector.

Parameters

• (function(Tv): bool) $fn - The callback used to determine the starting element for the returned ImmVector.

Returns

• ImmVector<Tv> - An ImmVector that is a subset of the current ImmVector starting with the value for which the callback first returns false.

Examples

See Vector::skipWhile for usage examples.