What are some good sites that have easy-to-learn languages such as terms and definitions?

Hello. I’m a novice programmer that tries to program during his spare time outside of work. Because of this, sometimes there will be big gaps in between and there will be a slip in knowledge.

I was wondering are there any sites that have like a cheat sheet of terms and definition and what certain code does. Not tutorial website because I have things like Udemy, Pluralsight, Treehouse. But just an easy site that acts like a cheat sheet with definitions, quick pictures, images etc.

Thanks