JavaScript 함수

const greet = function (greeting) {
  return function (name) {
    console.log(`${greeting} ${name}`);
  };
};

const greeterHey = greet('Hey');
greeterHey('bong');  // Hey bong
greeterHey('joon');  // Hey joon

greet('Hello')('bong');  // Hello bong

const greetArr = greeting => name => console.log(`${greeting} ${name}`);

greetArr('Hi')('bong');  // Hi bong

함수를 반환하는 함수.