如何在函数式编程中访问两个参数

Question

我有一个这样的管子pipe(    getUserData,    getLocationData,    someFunctionThatNeedBothUserAndLocationData)(input)我需要一个功能来访问这样的用户和位置数据function someFunctionThatNeedBothUserAndLocationData(user, location){    // do something}我怎样才能在函数式编程中做这样的事情？

Answer 1

用 不太可能pipe，因为后续函数是一元的（它们将前一个函数的结果作为参数）。一个汇聚功能有助于在这里我想！

const log = (user, location) => {

  console.log(`${user.name} is in ${location}`);

};

const getUserData = () => ({ name: 'Giuseppe' });

const getUserLocation = () => 'Bologna';

R.converge(log, [

  getUserData,

  getUserLocation,

])();

<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.26.1/ramda.js" integrity="sha256-xB25ljGZ7K2VXnq087unEnoVhvTosWWtqXB4tAtZmHU=" crossorigin="anonymous"></script>

Answer 2

我希望我不会太晚。

const pipedFunction = pipe(

    getUserData,

    getLocationData,

    someFunctionThatNeedBothUserAndLocationData

)(input)

const getLocationData = (userData) => [user, location]

const someFunctionThatNeedBothUserAndLocationData = (arg) => {

  const [user, location] = arg;

}

或者

const pipedFunction = pipe(

    getUserData,

    getLocationData,

    someFunctionThatNeedBothUserAndLocationData

)(input)

const getLocationData = (userData) => {user, location}

const someFunctionThatNeedBothUserAndLocationData = (arg) => {

  const {user, location} = arg;

}