Polymorphic this is really useful for the 'cannot reference a type twice in the ...

tlarkworthy on Dec 1, 2015 | parent | context | favorite | on: Announcing TypeScript 1.7

Polymorphic this is really useful for the 'cannot reference a type twice in the type list' issue you get when doing generics. Since learning it I have used it many times. It's solves many issues like typing a clone method. Awesome addition!