Invariants, Primitives

Learned about Invariants (how are these related if at all to business rule enforcement?) and topics of primitives, e.g. named primitives and how they can be a source of OO classes and regarding primitive obsession code smell.

C Basics

Was wondering about how the iterator over a pointer worked by simply adding 1 in final example of http://en.wikipedia.org/wiki/Struct_(C_programming_language). Answer:

Because pointers in BCPL and B are merely integer indices in the memory array, arithmetic on them is meaningful: if p is the address of a cell, then p+1 is the address of the next cell.

http://plan9.bell-labs.com/who/dmr/chist.html