Pick

Applies the given chooser function to successive elements, returning the first result where function returns an option value that IsSome.

It works similar to Choose function, but in this case only the first value is returned.

Parameters	Returns
Func<T, Option<T2>> chooser IEnumerable<T> source	T2

Exceptions

Type	When
InvalidOperationException	The chooser function returns options with IsNone for all elements.

Usage

Getting the double of first odd number in a collection

//IEnumerable<int> source = { 2, 2, 4, 4, 6, 6, 7, 8, 9 }

int result = source.Pick(value => 
            {
                if(value % 2 == 1)
                    return value * 2;
                else
                    return Option<int>.None();
            });

//result = 14