如何使函数与顺序调用和仅一个调用一起工作

Question

I'm trying to make a function work with this two calls:

func(1)(2); // 3
func(1, 2); // 3;

What i'm trying to do:

function func(x, y) {
  return (function(y) {
    return x + y;
  }(y));
}

But this won't work at all when i try to call in sequence. Is there other way to achieve that?

function add(x, y) {
  if (y) return x + y;
  return function(y) {
    return x + y;
  };
}

This would work, but i think it could be a better solution.

Thanks.

Answer 1

What you are looking for is called currying , here is how you could do it.

 function add(a, b){ if(typeof b !== 'undefined'){ return a + b; }else{ return function(c){ return a + c; } } } console.log(add(2, 3)); console.log(add(2)(3)); 

Also check this answer How to Write a function where the output for both “sum(2,3)” and “sum(2)(3)” will be 5

Answer 2

IMO没有这样做的充分理由，您有一个函数func(1, 2) ，如果要currify该currify ，只需用curry包装它，如果使用lodash ，则可以使用lodash var curried = _.curry(function)来咖喱一个函数var curried = _.curry(function) ，使您的函数干净