title | tags |
---|---|
uncurry |
function,intermediate |
Uncurries a function up to depth n
.
- Return a variadic function.
- Use
Array.prototype.reduce()
on the provided arguments to call each subsequent curry level of the function. - If the
length
of the provided arguments is less thann
throw an error. - Otherwise, call
fn
with the proper amount of arguments, usingArray.prototype.slice(0, n)
. - Omit the second argument,
n
, to uncurry up to depth1
.
const uncurry = (fn, n = 1) => (...args) => {
const next = acc => args => args.reduce((x, y) => x(y), acc);
if (n > args.length) throw new RangeError('Arguments too few!');
return next(fn)(args.slice(0, n));
};
const add = x => y => z => x + y + z;
const uncurriedAdd = uncurry(add, 3);
uncurriedAdd(1, 2, 3); // 6