Uncurry a function

JavaScript version

// `fn` is a curried function
// `n` is the depth of parameters
const uncurry =
    (fn, n = 1) =>
    (...args) =>
        (
            (acc) => (args) =>
                args.reduce((x, y) => x(y), acc)
        )(fn)(args.slice(0, n));

Examples

const sum = (a) => (b) => (c) => a + b + c;
uncurry(sum, 1)(1)(2)(3); // 6
uncurry(sum, 2)(1, 2)(3); // 6
uncurry(sum, 3)(1, 2, 3); // 6