Thoughts on Functional Programming Podcast

Yes. Locks slow down your code. But they enable your code to be correct! It’s a tradeoff, but who would ever trade correctness for a little speed? In this episode, we look at the tradeoff, how to make locks less of a speed tradeoff, and some alternatives.

Idempotence means duplicates don’t matter. It means you can safely retry an operation with no issues. The classic example is the elevator button: you press it twice and it does not call two elevators. We explore why we would want that property in an email server.

Commutativity is an algebraic property that means that order doesn’t matter. Because network messages arrive out of order, it’s the perfect property for distributed systems. In this episode, you’ll learn what it is (with some real world examples), why it’s useful, and 3 ways you can make an existing operation commutative.

Associativity is an algebraic property that enables us to easily break up a job into smaller jobs, do the jobs, then recombine the results. Associativity is the essence of composition. In this video, we go over what associativity is, why we want to use it, when to use it, and 3 keys for making an operation associative.

Timelines are a system I developed for modeling time in a distributed system. You will find timelines whenever you have multiple machines, multiple processes, multiple threads, or multiple async callback chains. Since virtually all software is distributed these days, modeling time is more important than ever. Functional programming may not have all the answers, but it is asking the right questions. In this episode, we go over what timelines are and how you can start to use them to model time in your software.

Hiring an on-site trainer can be expensive. But training itself doesn’t have to be expensive. In this episode, we go over 7 ways you can start training right away without breaking your budget.

Recursion is associated strongly with functional programming. We do use recursion more than imperative programmers do. But we also use iteration. In this episode, we talk about what recursion is, how to use it, when to use it, and when not to use it.

In functional programming, people often use the term side-effect. But what does it mean? Side-effect is any external effect a function has besides its return value.