> Most of us view code like a book, something to be ready in an orderly fashion. Do authors write books sequentially, first-chapter to last? Is code used sequ

> Most of us view code like a book, something to be ready in an orderly fashion. Do authors write books sequentially, first-chapter to last? Is code used sequentially, only in the same order those procedures are defined in a text-file? Does the text-file order of procedure definitions help us understand the call sequence?