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

The name of a variable, function, or class, should answer all the big questions. It should tell you why it exists, what it does, and how it is used.

it violates the Single Responsibility Principle7 (SRP) because there is more than one reason for it to change.

People are also afraid of renaming things for fear that some other developers will object. We do not share that fear and find that we are actually grateful when names change (for the better).

Functions should hardly ever be 20 lines long.