Shaving behavior

[rtm]

I am wondering if shaving is something that makes sense as a feature of curry-this.

Shaving is a good thing, and of course there are times when we want to do that. However, to me it makes more sense to have this be a separate feature (probably in some other functional library), rather than baked into currying. Is there a precedent for shaving in other currying libraries? If I need shaving, I can write it quite easily as:

function shave(fn, n) { 
  return function() { return fn.apply(this, [].slice.call(arguments, 0, n); }; 
}

I'd rather do this explicitly myself rather than have it be a side effect of passing placeholders to the curry function. In this approach, fn::curry(_, _) is equivalent to fn::curry(), with no shaving implications.

[stoeffel]

We could split it into it's own module shave-this. So one could do:

fn::shave(3)::curry();

What say @tomekwi @hemanth @davidchase ?

[hemanth]

👎 Too much of chaining with ::

[tomek-he-him]

have it be a side effect of passing placeholders to the curry function.

It’s not a side-effect. It’s 100% pure and well-documented. Have you read the discussion at #17?

[tomek-he-him]

@rtm @stoeffel What might make sense in my opinion is split the functionality into curry and applyPartially (the latter name would need thinking over).

This way we’d have an explicit:

f::curry()

and:

f::applyPartially(_, 1, 2, _)

[tomek-he-him]

::curry needs to know the length of the function. Otherwise we wouldn’t be able to make sure that:

plus(1, 2, 3);  //» 6
plus(1)(2, 3);  //» 6
plus(1, 2)(3);  //» 6
plus(1)(2)(3);  //» 6

As for shaving – since it’s not possible to

plus(1)(2, 3)(4);

– it shouldn’t be possible to do this (the last argument should have no influence on the result):

plus(1, 2, 3, 4);

That’s most logical and least astonishing to me. But feel free to disagree @rtm!

[stoeffel]

Created a new org as a home for function-bind-syntax-modules. If someone wants to contrib a shave or partial feel free to do so 😸 We will publish the modules later under @thisables/curry, @thisables/shave, ...

[tomek-he-him]

“thisables” – the best name ever! 😃