weekly | 前端周刊

Don’t Repeat Yourself

Good programmers are both lazy and very productive. They express a lot of functionality in very little code. Once you have established a pattern for something that gets repeated again in the code, it’s time to write a function, object, or module that encapsulates that pattern so that it can be easily reused.

Doing so also quarantines that functionality to a single spot in the code base, so that if you later find something wrong with the code or the algorithm, you only have to fix it in one place.

Do One Thing, And do it well, Less Is More

In order to aid readability and reduce the temptation to do more than one thing, functions should be as short as possible: Just enough code to do the one thing they were made to do, and no more. In most cases, functions should be just a handful of lines long. If they run much longer, consider breaking out subtasks and data into separate functions and objects.

Keep It Simple Stupid

Programmers are often tempted to come up with clever solutions to problems. That’s a good thing, of course, but sometimes programmers are too clever, and the solutions are cryptic. This tends to happen when a single line of code is used to accomplish more than a single atomic goal.