Redux Reselect selector to sort an array by date

orderListByDate.js

import { createSelector } from 'reselect';
import moment from 'moment';

export const orderListByDate = createSelector(state => {
  return state.sort((a,b) => {
    return moment.utc(b.startDate).diff(a.startDate);
  })
},
// the final paramenter in the createSelector 
// function must be a function that accepts as arguments 
// all returned results from the previous functions                                              
result => result
);