Transforming IEnumerable<Option<T>> to IEnumerable<T>

[punmechanic]

What would be the correct way to transform an IEnumerable of Option to simply an IEnumerable of T?

Let's say for example that I have a list of values and I only care about the ones that definitely have values and would like to both filter out the ones that are None as well as cause the type signature to match.

[nlkl]

Hi,

The currently recommended way to do this is:

var values = options.SelectMany(option => option.ToEnumerable());

However, as of version 4 which is just around the corner, this will be provided as an extension method directly:

using Optional.Collections;

...

var values = options.Flatten();

The exact name of the extension method is still something I am considering though, and it might end up as options.Values() instead, to allow a similar extension method for Option<T, TException> exceptional values (options.Exceptions()).

Hope it helps.

/Nils

[punmechanic]

Cool, thanks!