What Is Functional Programming

It produces programs by composing mathematical functions and avoids shared state & mutable data.

• Good to hear: Pure functions/function purity; Avoid side-effects; Simple function composition; Examples of functional languages: Lisp, ML, Haskell, Erlang,...

"Programming is how you get computers to solve problems".

There are two key phrases here which are important:

• You: without the programmer (you), the computer is useless. It does what you tell it to do.
• Solve problems: com...

Although “functional depression” isn’t a clinical diagnosis, for many people, it's a real problem.

This type of depression often goes undetected because when most people imagine a depressed individual, they think of someone who looks really sad or cries a lot. And while it...