text: import type { Action } from "../actions/types";
  import { SET_INDEX } from "../actions/list";
  
  export type State = {
    list: string
  };
  
  const initialState = {
    list: [
      "React Native Starter Kit",
      "React Navigation",
      "NativeBase Easy Grid",
      "NativeBase",
      "CodePush",
      "Redux",
      "Messages"
    ],
    selectedIndex: undefined
  };
  
  export default function(state: State = initialState, action: Action): State {
    if (action.type === SET_INDEX) {
      return {
        ...state,
        selectedIndex: action.payload
      };
    }
    return state;
  }
  