HH\Iterable::filter

Returns an Iterable containing the values of the current Iterable that meet a supplied condition.

Description

public function filter(
  (function(Tv):bool) $fn,
): Iterable<Tv>

Returns an Iterable containing the values of the current Iterable that meet a supplied condition.

Only values that meet a certain criteria are affected by a call to filter(), while all values are affected by a call to map().

Parameters

  • (function(Tv):bool) $fn - The callback containing the condition to apply to the Itearble values.

Return Values