# First Make It Correct
73 min read
Way back in December, in the spirit of the times (it seems that everyone was either solving Advent of Code or looking for a job), like an elephant in a china shop, I found myself solving a…
#functional-programming
# Random Scala Tip #624: The Pitfalls of Option Blindness
7 min read
When we use Option, what do we really mean by it?
# Whiteboxish Macro Powers with Named Tuples
11 min read
I've recently stumbled upon a post on Scala Contributors by Kit Langton describing how he managed to create the illusion of adding automatically derived (publicly visible) members to a companion of a…
# Random Scala Tip #568: Beware of Leaking Iterators
5 min read
The Scala collections library defines an Iterator trait. As you might expect, a typical Iterator's implementation relies on mutable state.
# Random Scala Tip #697: Avoid Anonymous Functions as Dependencies
6 min read
Imagine that you're building an app and somewhere in your code you write something like this:
# Purify Your Tests Episode IV: The Monoids Strike Back
21 min read
Welcome back to yet another episode of test purification. In the last part we explored another benefit of adding type parameters to our code, the ability to work with very lean mocks. It's been a…
# Purify Your Tests III: Lean, Mean Testing Machine
13 min read
In the last part we saw how to make our code more declarative, and the tests more functional by introducing type parameters for the inner data flowing through our code. In this part we are going to…
# Purify Your Tests: 2 Parametric, 2 Declarative
13 min read
In the last part we learned how to purify our tests using type parameters. In this and following parts we'll see some further benefits of adding type parameters this way.
# Purify Your Tests
11 min read
Here's a fun little trick to purify your tests. When I say "purify" I mean it in the pure functional programming sense of making the tests side-effect-free. But more specifically, I'm going to show…
# When Are Functions Lazy Enough for Lists
9 min read
Recently, I've been TA-ing on an introduction to functional programming course, using Haskell. This is a very enlightening experience, as it once again proves the notion that the best way to learn…
