Clean Code: A Handbook of Agile Software Craftsmanship (Robert C. Martin Series)

by Robert C. Martin

A place for everything, and everything in its place.

You should name a variable using the same care with which you name a first-born child.

You are reading this book for two reasons. First, you are a programmer. Second, you want to be a better programmer. Good. We need better programmers.

A building with broken windows looks like nobody cares about it. So other people stop caring. They allow more windows to become broken.

programming is a social activity.

One difference between a smart programmer and a professional programmer is that the professional understands that clarity is king. Professionals use their powers for good and write code that others can understand.

The first rule of functions is that they should be small. The second rule of functions is that they should be smaller than that.

FUNCTIONS SHOULD DO ONE THING. THEY SHOULD DO IT WELL. THEY SHOULD DO IT ONLY.

Side effects are lies.

This side effect creates a temporal coupling. That is, checkPassword can only be called at certain times

11. Those who felt that they could get away without recompiling and redeploying have been found—and dealt with.

Others who see that commented-out code won’t have the courage to delete it. They’ll think it is there for a reason and is too important to delete. So commented-out code gathers like dregs at the bottom of a bad bottle of wine.

Code formatting is important. It is too important to ignore and it is too important to treat religiously.

communication is the professional developer’s first order of business. Perhaps you thought that “getting it working” was the first order of business for a professional developer.