Comments should not duplicate the code (D.R.Y) - Deepstash

Comments should not duplicate the code (D.R.Y)

Your comments should be D.R.Y. The acronym stands for the programming maxim “Don’t Repeat Yourself.” This means that your code should have little to no redundancy. You don’t need to comment a piece of code that sufficiently explains itself. For example:

return a # Returns a

We can clearly see that 'a' is returned, so there’s no need to explicitly state this in a comment. It adds no information whatsoever and incurs a maintenance cost. This makes comments W.E.T., meaning you “wrote everything twice.”

14

24 reads

The idea is part of this collection:

Machine Learning With Google

Learn more about computerscience with this collection

Understanding machine learning models

Improving data analysis and decision-making

How Google uses logic in machine learning

Related collections

Similar ideas to Comments should not duplicate the code (D.R.Y)

Good comments do not excuse unclear code

A misuse of comments is to provide information that should have been in the code. An example is when someone names variables badly and then tries to add comments describing them:

# A dictionary of families who live in each city

mydict = {

"Midtow...

Read & Learn

20x Faster

without
deepstash

with
deepstash

with

deepstash

Personalized microlearning

100+ Learning Journeys

Access to 200,000+ ideas

Access to the mobile app

Unlimited idea saving

Unlimited history

Unlimited listening to ideas

Downloading & offline access

Supercharge your mind with one idea per day

Enter your email and spend 1 minute every day to learn something new.

Email

I agree to receive email updates