Keep it Local (EmberConf 2021)

What do Steve McConnell’s variable scoping guidelines in Code Complete 2, pure functional programming, the data ownership system in Rust, classical object-oriented programming, the actor model in Erlang, and autotracking in Glimmer all have in common? Every one of them is aiming at the same key ingredient of robust, reliable software: the ability to “reason about your code.” But what does that actually mean?