If setting out to find a vulnerability, how do you get started?

What is the “open ide, write print(“hello world”)” for this kind of work?

I mean the bindings and collections. For example, when you make an array in JS, the default syntax is a mutable list with a mutable binding:

    let xs = [ 1, 2, 3 ]

I should be more precise - there needs to be some way to mange effects. Monads with syntax extensions is simply the most common (Haskell, Scala, F#, Closure macros)

> and even if they are, modern c++ fully supports them, as does rust, javascript, etc. It's very common in javascript to use Array.map() and Array.flat().

JavaScript does not have good monad support. This is why async/await was added as a new language feature. Yeah, I know you can hack together something with generator functions, but it’s hardly idiomatic.

But we’re getting into the weeds here. My point is: I don’t consider a language to support FP when writing functional code in that language leads to lots of friction compared to what is idiomatic.

Have you ever tried FP in Java? It works for some toy thing but then you hit the lack of TCO, or the ridiculously long type names (not inferred) or the pyramid of doom…

You need expression orientation, immutability by default, persistent collections in the standard library, some way to handle monadic code, etc…

If what you need is available, however, then it can be so much better.

Records can have no state - compared to regular classes - so they are an anti-OOP feature.

FP is much more than this one language feature.

However, most developers wouldn’t understand, say, a result monad implemented via LINQ, so you’re still fighting the ecosystem somewhat.