What are the differences between trait and abstract,

There is no difference in feeling. I really didn't think there is a difference in that scenario. I really didn't think there is a difference in that scenario.

Reply content:

I think there is no difference. I really didn't think there will be a difference in that scenario.

You cannot extend multiple abstract classes on one class, but you can use multiple trait

Abstract class is an article on the Type System, and the trait fragment is mixin.

	Type Constraints	Code reuse
Class	Yes	Yes
Interface	Yes	No
Trait	No	Yes