The F# syntax would endlessly confuse me though. I'd always wonder whether |> join(' ') means join(x, ' ') or join(' ', x).
Just replace this:
x |> f
f(x)
xs
|> (x => x.join(' '))
(x => x.join(' '))(xs)
xs.join(' ')Does join(a)(b) mean join(a, b) or join(b, a)? Does it mean a.join(b) or b.join(a)? And is a or b the delimiter? I don't really feel confident without looking it up or trying it out. I have a similar problem with Haskell's function syntax a -> a -> a.
If the function was called makeJoinerBy(sep)(array), it would be somewhat clearer:
join = makeJoinerBy(' ')
result = join(array)(the requirement being that join(' ') returns a function that takes one arg)
The middle example would be using native stuff which is why you have the wrapper function (kinda like you'd have a function wrapping a callback)