Lecture Notes for February 18

Read for Today

• Sections 3.3 and 3.5.

Topics to Cover Today

• Information hiding
  • cognitive load
  • name conflicts
  • data abstraction integrity
  • run-time errors
  Tools for information hiding
  • separate compilation (Pascal, C)—joke!
  • OO classes with private and public access (Java, C++, Ruby)
  • modules (Modula-2, Haskell) with exporting and importing
  Haskell importing and exporting, qualified, as Binding of referencing environments
  • dynamic versus static scope
  • subroutine closures, first-class subroutines