SOURCE

function curry(func){
    return function curried(...args){
        if(args.length>=func.length){
            return func.apply(this,args)
        }else{
            return function (...moreArgs){
                return curried.apply(this,args.concat(moreArgs))
            }
        }
    }
}
function add(a, b, c) {
  return a + b + c;
}

const curriedAdd = curry(add);

console.log(curriedAdd(1)(2)(3)); // 输出 6
console.log(curriedAdd(1, 2)(3)); // 输出 6
console.log(curriedAdd(1)(2, 3)); // 输出 6