text: import { FETCH_POSTS, FETCH_POST, DELETE_POST } from '../actions'
  import _ from 'lodash'
  
  export default function(state = {}, action) {
      switch (action.type) {
          case DELETE_POST:
              return _.omit(state, action.payload)
  
          case FETCH_POST:
              // const post = action.payload.data;
              // const newState = { ...state  }
              // newState[post.id] = post
              // return newState
              return { ...state, [action.payload.data.id]: action.payload.data}
  
          case FETCH_POSTS:
              return _.mapKeys(action.payload.data, 'id') //change array to object
          default:
              return state
      }
  }