Has a simple example of Dart event loop implementation

a) add the async keyword to the main() function. b) add the await keyword in front of the future object. Result: Once Dart encounters the await keyword, it sends all the code starting from that line to the event queue and waits for the future to complete. That’s why you see the number 2 before 3.

extension CurryFunction on R Function(S, T) { /// Curry a binary function with its first argument. R Function(T) curry(S first) => (T second) => this(first, second); }

Good explanation of type system in Dart as it relates to Function types

open, base, switch classes.

Also describes 1) a edge scenario where class is used as mixin, then it should define a factory constructor and be abstract. 2) if the same message on 2 mixins is 'move' the 'move' on the rightmost mixin is called (and no other mixin's 'move', unless the rightmost 'move' calls 'super'.

implements vs extends in Dart classes and mixins