Merge pull request #55 from Windows81/patch-1

Clarify Exercise 12.2

12-letterbox/README.md

@@ -18,3 +18,25 @@ Possible names:
 - Messaging style
 - Objects
 - Actors
+
+## Style #12.2
+
+Constraints:
+
+- For each 'thing' class, let's bring the `info` methods from the Things style (#11)
+
+- In the Things style, we used inheritance via a Python call to `super` to call a shared function from a base class
+
+- We should apply this concept of code-reuse, but make sure to do so without using inheritance
+
+- In typed languages, using delegates (or `Callable` in Python) is a recommended solution
+
+- Just like in style 11, we will not be calling `info` in the main routine
+
+Note:
+
+A [delegate](https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/delegates/using-delegates?source=recommendations) is a type that safely encapsulates a method, similar to a function pointer in C and C++. Unlike C function pointers, delegates are object-oriented, type safe, and secure
+
+Possible names:
+
+- Delegation