Metaprogramming in Ruby

What is metaprogramming?

Here’s a definition from Metaprogramming Ruby 2:

Metaprogramming is writing code that manipulates language constructs at runtime.

Unlike in C, which has a distinction between compile time (language constructs available) and runtime (machine code), Ruby doesn’t have compile time at all. Most Ruby constructs are available at runtime making it a very metaprogramming friendly language.

Below are my notes in the form of Ruby metaprogramming patterns, approaches, and “spells” inspired by Metaprogramming Ruby 2.

From gist.github.com/BrianSigafoos