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Showing posts from May, 2018

Scala Coding Exercise - A Recursive Implementation of an Immutable List

I recently got to code a list as an interview coding exercise from one of the FAANGs. I thought that it might be a good idea to post it there for future reference.

I went for a recursive and immutable implementation. It's quite naive and I would certainly not use it in production, but as an exercise it was fun writing it due to its elegance.

If you look at the list implementation in Scala 2.12, they went for an imperative solution for most methods... Elegance sometimes comes at too high a price in terms of performance!

So... Do I pass the Fizz Buzz test?

Functional Programming as a Case of Math Envy

Lies, damned lies, and mathematics. - Mark Twain

You know that something is fishy when people start using complex math when they don't need it.

Immutability, no side effects? Yes, when it makes sense. Every smart developer will get to this point eventually.

But category theory everywhere? I call it math envy.

Do you really think that because you are using only pure functions your program will be bug free? More performant? Faster to develop? Easier to maintain?