Discussion on: Any suggestions for books to learn Functional Programming Paradigm

const cf = (a) => (b) => (c) => (d) => { return a * b * c * d; }
const answer = cf(3)(4)(5)(6)
const paf = cf(3)(4)
const answer2 = paf(3)(4)

template<typename Function, typename... Arguments>
auto partial_application(Function function, Arguments... args) {
    return [=](auto... rest) {
        return function(args..., rest...);
    };
}
auto add6 = [](int a, int b, int c, int d, int e, int f) -> int { return a + b + c + d +e + f; }
auto pa1 = partial_application(add6, 4);
auto pa2 = partial_application(pa1, 5);
auto pax = pa2(10, 11, 12, 13);

auto c0 = curry(add6);
auto c1 = c0(4); // sort of kind of like pa1
auto c2 = c1(5); // sort of kind of like pa2
auto cx = c2(10)(11)(12)(13);
// note that c2 and pa2 are called in very different ways.
// cx and pax both equal 55.

let cf a b c d = a * b * c * d 
let answer = cf 3 4 5 6 
let paf = cf 3 4
let answer2 = paf 3 4