The Haskell School of Expression

[freizl]

[freizl]

Chapter 1

• In Haskell, the objects that we perform calculations on are called expressions,
  and the objects that result from a calculation are called values.
  It is helpful to think of a value just as expression on which no more calculation can be carried out.
• You can think of types as set of expressions (or values) in which
  members of same set have much in common.