ConstSet::filter

Returns a ConstSet containing the values of the current ConstSet that meet a supplied condition applied to each value

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

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

Guide

• Examples

Parameters

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

Returns

• ConstSet<Tv> - a ConstSet containing the values after a user-specified condition is applied.