The Robert C. Martin Clean Code Collection (Collection)

Notice that the generatePrimes function is divided into sections such as declarations, initializations, and sieve. This is an obvious symptom of doing more than one thing. Functions that do one thing cannot be reasonably divided into sections.

So, another way to know that a function is doing more than “one thing” is if you can extract another function from it with a name that is not merely a restatement of its implementation [G34].

Remember that the people who read your code will be programmers. So go ahead and use computer science (CS) terms, algorithm names, pattern names, math terms, and so forth. It is not wise to draw every name from the problem domain because we don’t want our coworkers to have to run back and forth to the customer asking what every name means when they already know the concept by a different name.