F# 4.0 Design Patterns

Chapter 1. Begin Thinking Functionally

A man with a chainsaw enters a hardware shop and says to the assistant: "Two weeks ago, you told me this thing would allow me to chop down 30 trees in an hour. But I can only manage one tree. I want to return this for a refund". The assistant says "let me see" and starts the chainsaw. The visitor jumps back screaming "What's that noise?!"-An old joke

The joke opening my narrative is very relevant to the subject of this chapter: in order to achieve the benefits expected from the use of any tool, you should know how to use that tool the right way. Moreover, an advanced tool used in a wrong manner may be even less productive than the corresponding simple one used the right way. A hammer outperforms a microscope ...