How to Use Dependency Injection in Functional Programming

I'll show one of the problems Dependency Injection solves in Object Oriented Programming code bases, then show a similar technique in Functional code. You just use function arguments. Once you grok this, you'll be equipped to grok the more advanced partial application use.

[johnjackson]

This is so underrated!! This cleared up so much of my confusion when trying clean architecture.

[vinicch]

Awesome video! More people should watch this. You made it very easy to understand. Keep up the good work.

[MohamedCherifBOUCHELAGHEMdz]

I type my functions in typescript to define the “algebra”.
Usually I make functions with parameters that return a function but I think I’ll just try your idea here or maybe define dependencies type but it could be so much.
What do you think about fp dependency injection using reader monad?

[peristiloperis]

Love your videos. I'm a big fan since your first javascript lessons.

[aidiansvaant]

I thoroughly enjoyed this entire video. Very nice explanation of a ton of things, but one thing I noticed is you throw the word "deterministic" around a lot instead of something like "pure" when you mention side effects. Such as reading from disk maintaining a programs deterministic state. This doesn't really follow through, instead you should use the word "pure" because it makes more sense and it aligns with what you're teaching. Great video nevertheless.

[solisarg]

Fluid and fast, love the video. But probably non-english speakers will have a hard time trying to follow.