小编Sto*_*ent的帖子

我什么时候做 <CustomComponent function = {this.FunctionName}/>

而不是<CustomComponent function = {this.FunctionName.bind(this)}？

React 的文档提到bind()解决了这个有问题的不等式： obj.method();=/= var method = obj.method; method();。对方法的第二次调用与第一次调用有何不同？它是否无法访问正在调用它的对象实例的实例变量等？另外， a 中的参数到底是什么bind()- 即this.FunctionName.bind(this)绑定到FunctionName？

有人可以解释为什么下面的“ board”初始化不起作用吗？这是我的代码：

public partial class frmSudoku : Form
{
   Label[,] board;    

   public frmSudoku()
   {
      InitializeComponent();
      board = {{lblS00, lblS01, lblS02, lblS03, lblS04, lblS05, lblS06, lblS07, lblS08},
                 {lblS10, lblS11, lblS12, lblS13, lblS14, lblS15,lblS16,lblS17, lblS18},
                 {lblS20, lblS21, lblS22, lblS22, lblS24, lblS25, lblS26, lblS27, lblS28},
                 {lblS30, lblS31, lblS32, lblS33, lblS34, lblS35, lblS36, lblS37, lblS38},
                 {lblS40, lblS41, lblS42, lblS43, lblS44, lblS45, lblS46, lblS47, lblS48},
                 {lblS50, lblS51, lblS52, lblS53, lblS54, lblS55, lblS56, lblS57, lblS58},
                 {lblS60, lblS61, lblS62, lblS63, lblS64, lblS65, lblS66, lblS67, lblS68},
                 {lblS70, lblS71, …

也许我太忙于测试我的作业，但这是我的困境：

这是我的冒犯功能（或多或少）：

struct thing{
    char* data;
}

int function(struct thing* arg){
    if(arg->data == NULL)
        return -1; 
}

这是我的冒犯性输入：

struct thing *x = malloc(sizeof(struct thing));
function(x);

当我测试它时，valgrind 会输出这个：

struct thing{
    char* data;
}

int function(struct thing* arg){
    if(arg->data == NULL)
        return -1; 
}

我大约 99% 确定这是因为 valgrindx->data在尚未初始化NULL或分配时存在评估问题。有解决方法吗？