Metaprogramming
One thing seems to unite programmers, no matter how different they are otherwise: the enjoyment of jokes on recursion. There’s something in the programmer’s mind that appreciates a certain type of symmetry. When it comes to programming languages and programming paradigms, you’d be hard-pressed to find a more symmetrical type of language than one that can understand itself.
The corresponding programming paradigm is called metaprogramming, and programming languages that take this idea to the limit are known as homoiconic, meaning that a program can manipulate another program’s representation or its own as data. Programming languages that have this property include Lisp and its derived dialects, the latest being Clojure.
Metaprogramming is very powerful, but also very difficult to master, and can introduce a lot of issues in large projects. Some features connected to metaprogramming are available in modern languages, such as instrumentation...