Instructions

Want to stretch your brain and practice some dark JavaScript forces? Here is the task - implement add function that passes the tests:

test(add(1, 2), 3);
test(add(3)(4)(), 7);
test(add(3)(4)(5), 12);

var three = add(3);
var four = add(4);
test(three, 3);
test(four, 4);
test(three(5), 8);
test(three(6), 9);
test(three(four), 7);
test(three(four)(three(four)), 14);

test(add(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15), 120);
test(add(1.5, 2), 3.5);

How to run

$ git clone https://github.com/frantic/currying
$ node nuts

Your task is to implement add function and make sure all tests pass.

Next level

Provide the shortest implementation that does not leak to the global scope.

Have fun :)