indexOf filter map

if(this.testServiceVersions.indexOf(value) == -1) {}

// Update Cart
// store.dispatch(updateCart('Flour 1kg', 5, 110));

// Delete from Cart
// store.dispatch(deleteFromCart('Coffee 500gm'));

    case UPDATE_CART: {
      return {
        ...state,
        cart: state.cart.map(item => item.product === action.payload.product ? action.payload : item)
      }       //state store中数据     //每个product
    }

    case DELETE_FROM_CART: {
      return {
        ...state,
        cart: state.cart.filter(item => item.product !== action.payload.product)
      }
    }