MutableSet::map

Returns a MutableSet containing the values after an operation has been applied to each value in the current MutableSet.

Description

public function map(
  (function(Tv):Tu) $fn,
): MutableSet<Tu>

Returns a MutableSet containing the values after an operation has been applied to each value in the current MutableSet.

Every value in the current MutableSet is affected by a call to map(), unlike filter() where only values that meet a certain criteria are affected.

Parameters

  • (function(Tv):Tu) $fn - The callback containing the operation to apply to the current MutableSet values.

Return Values