Method: Applies the callable to the value of the option if it is non-empty, and returns the return value of the callable directly.

Method: If the option is empty, it is returned immediately without applying the callable.

Method: If the option is empty, it is returned immediately without applying the callable.

Method: If the option is empty, it is returned immediately.

Method: If the option is empty, it is returned immediately.

Method: Binary operator for the initial value and the option’s value.

Method: foldLeft() but with reversed arguments for the callable.