Ravnary · an open library

Read one card.
Then the next.

Short, checked cards on things worth knowing, gathered into topics, subjects and paths, with questions alongside whenever you want to test yourself.

Huginn carries the thought out. Muninn brings it back.

Cards: 383
Topics: 50
Subjects: 6

Start here

Subject · Beginner to Advanced
Docker
Running software in containers, and building images that other people can run.
- Running Containers
- Building Images
5 topics · 29 cardsnot started
Subject · Beginner to Advanced
Java
Writing Java that compiles, runs, and models a problem with objects.
- The Language
- Objects
- When Things Go Wrong
15 topics · 131 cardsnot started
Subject · Intermediate to Advanced
Java Collections and Streams
Holding data in the right Java collection, and transforming it without writing a loop.
- Collections
- Pipelines
9 topics · 78 cardsnot started
Subject · Intermediate to Advanced
Java Concurrency
Running Java on more than one thread without corrupting the data underneath.
- Threads and What They Cost
- Why Shared State Breaks
- Locks
5 topics · 43 cardsnot started
Subject · Beginner to Advanced
Spring Core
Wiring a Java application together with Spring's IoC container, instead of doing it by hand.
- Why Spring Exists
- The Bean and the Container
- Wiring Beans Together
4 topics · 25 cardsnot started
Subject · Intermediate to Advanced
Spring Boot
Building a REST service with Spring Boot — wired for real data, validated, and fast enough to trust in production.
- Spring Boot Essentials
- Building REST APIs
- Data Access
12 topics · 77 cardsnot started

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