柯里化的实现

// 柯里化的实现
function add (a, b, c) {
    return a + b + c
}

function curry (fn) {
    function curried(...arg1) {
        if (arg1.length >= fn.length) {
            return fn.apply(this, arg1)
        } else {
            function curried2 (...arg2) {
                return curried.apply(this, [...arg1, ...arg2])
            }

            return curried2
        }
    }

    return curried;
}

const addCurry = curry(add);

console.log(addCurry(1, 2, 3));
console.log(addCurry(1)(2)(3));
console.log(addCurry(1, 2)(3));