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Articles tagged with #scala
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 leetcode-style problem. Before I say anything else1, I would ...
Given this class: case class User( id: UserId, email: Option[Email], address: Option[Address], posts: Option[List[Post]], lastLogin: Option[Timestamp]) What does Option on each of the fields actually means? Well, after spending hours diggi...
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 class. Something that's no longer possible to achi...
The Tip The Scala collections library defines an Iterator trait. As you might expect, a typical Iterator's implementation relies on mutable state. And so for the today's tip: Beware of leaking Iterator instances outside the scope you initialized it ...
The Problem Imagine that you're building an app and somewhere in your code you write something like this: class DoFinanceStuff(cc: CreditCardService): def grabClientMoney(card: CardData) = val amount = // ... // ... cc.processPayment...
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 while since the last part, so please take a look there...
