Question

I need to go through x number of objects. Each object will have (int) ID and (bool) Complete fields. The ID field will be unique. How do I find objects that have Complete==true and consecutive ID fields. For example, I want to find any 3 consecutive objects that meet this condition:

object (ID=1, Complete=true)
object (ID=2, Complete=true)
object (ID=3, Complete=false)
object (ID=4, Complete=true)
object (ID=5, Complete=true)
object (ID=6, Complete=true)

In the above, I should get objects 4, 5, 6. Another example:

object (ID=1, Complete=true)
object (ID=2, Complete=true)
object (ID=3, Complete=false)
object (ID=4, Complete=true)
object (ID=5, Complete=true)
object (ID=6, Complete=false)

In this case, 3 consecutive objects of Complete==true do not exist.

Answer 1

var triplets = list.Select((item, index) => list.Skip(index).Take(3));
var candidates = triplets.Where(triplet => (triplet.Count() == 3) && 
                                           (triplet.All(item => item.Complete)));