Question

我具有以下格式的数据：如果要删除“ 2019-06-28”怎么办？

我通过此代码制作数据

  let obj = this.state._markedDates.reduce((c, v) => Object.assign(c, {
                    [v]: {
                        selected: true,
                        marked: true
                    }
  }), {});
  this.setState({marked: obj});

现在我要删除对象内部的任何人都可以帮助我吗？我使代码在本机反应中

Object {
  "2019-06-20": Object {
    "marked": true,
    "selected": true,
  },
  "2019-06-28": Object {
    "marked": true,
    "selected": true,
  },
}

Answer 1

您可以从对象中删除键

const a = {
  "2019-06-20": {
    "marked": true,
    "selected": true,
  },
  "2019-06-28": {
    "marked": true,
    "selected": true,
  },
};

Object.keys(a).forEach(keyToBeDeleted => {
  // keyToBeDeleted has `2019-06-20` and `2019-06-28`
  if (keyToBeDeleted === '2019-06-28') {
     delete a[keyToBeDeleted]; // this will delete the key in your object as it is in loop. Treat your logic as per your requirements
  }
})

Answer 2

    public static byte[] ReplaceBytes(byte[] src, byte[] search, byte[] repl)
    {
        if (repl == null) return src;
        int index = FindBytes(src, search);
        if (index < 0) return src;
        byte[] dst = new byte[src.Length - search.Length + repl.Length];
        Buffer.BlockCopy(src, 0, dst, 0, index);
        Buffer.BlockCopy(repl, 0, dst, index, repl.Length);
        Buffer.BlockCopy(src, index + search.Length, dst, index + repl.Length,src.Length - (index + search.Length));
        return dst;
    }

    public static int FindBytes(byte[] src, byte[] find)
    {
        if(src==null|| find==null|| src.Length==0|| find.Length == 0 || find.Length> src.Length) return -1;
        for (int i = 0; i < src.Length - find.Length +1 ; i++)
        {
            if (src[i] == find[0])
            {
               for(int m=1;m< find.Length;m++)
               {
                    if (src[i + m] != find[m]) break;
                    if (m == find.Length - 1) return i;
               }
            }
        }
        return -1;
    }

如何从react（javascript）

2 个答案: