我没有得到我想要的结果

Question

实际上我是 React redux 的新手，我正在构建一个项目，我想在其中更新数组中的特定对象我试过了，但我没有得到想要的结果

const coinState = {
  coins: [],
};
export const coinReducer = (state = coinState, action) => {
  switch (action.type) {
    case "AFTER_BUY": {
      return { ...state, coins: [...state.coins, action.payload] };
    }
    case "AFTER_SELL":
      return {
        ...state,
        coins: state.coins.filter(
          (c) => c.coinName !== action.payload.coinName
        ),
      };
    case "UPDATE_BUY": {
      const newArr = [...state.coins];
      newArr.map((coin) => {
        if (coin.id === action.payload.id) {
          Here i want to add previous and new state eg : coin.AmountofCoins=10 and
          payload coins is 10 then i want 20 as sum but
          getting 1010 as result
         
          coin.AmountOfCoins += action.payload.AmountOfCoins;

        }
      });
      return {
        coins: newArr,
      };
    }

Answer 1

您的一个或两个金额似乎是字符串而不是整数。尝试使用

coin.AmountOfCoins += parseInt(action.payload.AmountOfCoins, 10)

将其强制转换为整数。

我没有得到我想要的结果

Im not getting the result what i want

reactjs

react-redux