winstonewert on Snake in Elm with WebGL

Comment on Snake in Elm with WebGL parent

Well, something like C-like, for maximum familiarity.

What functionality is difficult to render in C-like syntax?

Currying

I can get the same effect as currying with C syntax by deliberating invoking a special function:

    functools.partial(old_function, my_new_argument)

Is this such a useful thing that you need the functional style syntax to make it even easier to do?

orblivion 9y

You can do it in Python as you have, but it becomes second nature with Haskell (I can't speak to Elm directly). You might not even realize you're doing it.

Add 5 to each num in a list (using a pretend function called `add` in both languages to be fair):

  map(functools.partial(add, 5), nums)

  map (add 5) nums

Add 5 to each in a list of list of numbers:

  map(functools.partial(map, functools.partial(add, 5)), nums)

  map (map (add 5)) nums

winstonewert 9y

I suppose it would make more sense to write these as lambdas in a c style syntax

   nums.map(|sublist| sublist.map(|num| add(num, 5))

Maybe I haven't done enough functional programming yet, but I still like the explicitness of the C-style over the functional style.

kasbah 9y

Sorry, but there is nothing more explicit about using lambdas as you have done, it's simply redundant (notice the repetition of sublist and num arguments).

nathancahill 9y

Yes

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