创建助手函数以在我的redux reducer代码中重复使用以改变状态

//-------OPTION 1

//on helper file
function doStuff = (acc, product){
  //logic here
  return newProductsList;
}

//on reducer file
import {doStuff} from '../helpers/myHelper'
case Constants.MOVE_PRODUCT:      
  return {
    ...state,
    products: state.products.reduce((acc, product) => doStuff, [])
    };




//-------OPTION 2

//on helper file
const doAnotherStuff = (products) => products.reduce((acc, product) => {
 //logic here
},[]);


//on reducer file
import {doAnotherStuff} from '../helpers/myHelper'
case Constants.MOVE_PRODUCT:      
  return {
    ...state,
    products: doAnotherStuff(state.products)
 };