Good Code, Bad Code

2 Layers of abstraction

This chapter covers

• How to break a problem down into subproblems with clean layers of abstraction
• How layers of abstraction can help us achieve a number of the pillars of code quality
• APIs and implementation details
• How to break code into distinct layers of abstraction using functions, classes, and interfaces

Writing code is about solving problems. These can be high-level problems, such as “We need a feature to allow users to share photos,” all the way down to low-level problems such as “We need some code to add two numbers together.” Even if we’re not conscious of the fact we’re doing it, when we solve a high-level problem, we usually do it by breaking it down into multiple, smaller subproblems. A problem statement ...