JavaScript 函数柯里化

curry.js

function curry(fn) {
  return function curried(...args) {
    if (fn.length === args.length) {
      return fn.apply(this, args);
    }
    return (...extraArgs) => {
      return curried.apply(this, args.concat(extraArgs));
    };
  };
}

Assume we have a function, receiving several parameter and do something:

function doSomething(task1, task2, task3) {
  task1()
  task2()
  task3()
}

Then we should implement a fn to make function Curry:

function curry() {}

const curried = curry(doSomething)

curried(task1, task2, task3)
curried(task1, task2)(task3)
curried(task1)(task2)(task3)