flatMap<A, B> function

Transforms the value inside an Option using a function that returns an Option.

flatMap is used to apply a function that returns an Option to the value wrapped inside another Option. If the input Option is None, the result will also be None. If the input Option contains a value, the function will be applied to that value, and the resulting Option is returned.

Example:

Option<int> someValue = Some(10);

var doubled = flatMap<int, int>((x) => Some(x * 2))(someValue);  // Should result in Some(20)

var noneResult = flatMap<int, int>((x) => None())(someValue);    // Should result in None

var noneInput = flatMap<int, int>((x) => Some(x + 5))(None());  // Should result in None

@param f A function that takes a value of type A and returns an Option of type B. @return A function that takes an Option of type A and returns an Option of type B.