Question

I have two Dictionary<Person,Boolean>.
dict a contains :

Person A -> false
Person B -> true,
Person C -> false;

dict b contains :

Person A -> true;
Person D -> false;

I want to have an result, which contains all Persons one time, and set Boolean to ture, if a person contains a true in one of both lists.

How can i solve this with dict.Union() ?

Thanks Kooki

Answer 1

Sounds like you could use:

var result = first.Union(second)
                  .GroupBy(x => x.Key)                // Group by dictionary keys
                  .ToDictionary(g => g.Key,           // Key for new dictionary
                                g => g.Any(p => p.Value)); // Any true values?