Scala Errors & Edge Cases
Errors & Edge Cases for Scala: Writes the happy path well.
Who it is for
Writes the happy path well.
The behaviour people get wrong after they are already productive in the language.
You will get the most out of it if you have written Scala recently enough to read it without effort, and have been surprised by it at least once. If you are picking the language up for the first time, start with Scala Essentials and come back to this one.
It is also built for interview preparation: the questions are the ones that get asked because they separate people who have read the documentation from people who have hit the behaviour in production.
How long it takes
Planned at 90 graded questions, which is about 68 minutes of answering and roughly 18 days at five a day.
Nothing ships until every runnable snippet in it has been executed and matched against its answer.
Syllabus
What you will be asked about
This course is in production
It is planned as ten topics of ten questions, the same shape as every other course in the catalogue: one concept card, six multiple-choice questions, one predict-the-output, one ordering task and one matching task per topic. The topics themselves are mined from Scala Language Specification, and nothing is listed here until the questions exist and have been executed — a syllabus written before the content is a promise, and this page only carries facts.
Free and paid courses are decided per course, not per language, and this one will be included in a subscription.
The rest of the track
Scala at every depth
Scala Essentials
Essentials for Scala: Knows the syntax, not yet the behaviour.
Scala Core
Core for Scala: Works in it, has gaps.
Scala Data & Collections
Data & Collections for Scala: Comfortable, but surprised by how containers behave.
Scala Standard Library
Standard Library for Scala: Reaches for a dependency before the built-in.
Scala Idioms & Pitfalls
Idioms & Pitfalls for Scala: Fluent, writes it like another language.
Scala Advanced
Advanced for Scala: Confident; wants the traps.
Scala Performance
Performance for Scala: Has never measured anything.
Scala Testing
Testing for Scala: Tests the code they wrote, not the code they meant.
Scala Interview Questions
Interview Questions for Scala: Preparing, and short of time.
Scala Errors & Edge Cases is being written
Start with what is already live.
Every track that is already live works the same way: five questions a day, mixed across the courses you have enrolled in.
Browse the catalogue