Get Clear With Functional Programming

I started my journey into learning Functional Programming (FP) with introduction to Ruby. And as days have passed, more and more modern languages include functional programming features. However, there were instances of confusion while exploring FP as coexisting with OOP. And each time I kept going back to this same article which explains its essence, its benefits and its ideas. Check it out, it will help a lot if you are currently in your baby steps towards FP.