ImmMap after an operation has been applied to each key and
value in current
public function mapWithKey<Tu>(
): ImmMap<Tk, Tu>;
Every key and value in the current
ImmMap is affected by a call to
filterWithKey() where only values that meet a
certain criteria are affected.
The keys will remain unchanged from the current
ImmMap to the returned
ImmMap. The keys are only used to help in the operation.
(function(Tk,Tv):Tu) $callback - The callback containing the operation to apply to the
ImmMap keys and values.
ImmMap<Tk, Tu> - an
ImmMap containing the values after a user-specified
operation on the current
ImmMap's keys and values is applied.