查询词典 nil pointer

Internally this just sets compare function pointer to NULL to ensure that

这只是设置内部比较函数指针为NULL，以确保

It's impossible to call a virtual function through a null pointer at runtime because of an uninitialized vtbl.

它不需要用对象指针·它节约了vtbls所需的内存·在运行时不可能发生因为没有初始化vtbl而通过一个空指针调用虚函数。

To ensure that the aName parameter is a pointer, use the macro NS_PRECONDITION to warn if null, follow with a null test in the line below, and return the error result code NS_ERROR_NULL_POINTER.

然后是个判空测试，在指针为空时返回错误码NS_ERROR_NULL_POINTER。

The pointer is not NULL but the object is long gone.

指针不为NULL，但对象已经不存在了。

Each theme has a next pointer, which should either be NULL or point to another theme in t he same file.

usplash 主题库在一个连接的列表里可以容纳多个主题，美国主题有一个 next 指针，它要么为空，要么指向另一个在同一文件中的主题。

Therefore, it is easy to detect the use of a NULL pointer.

因此，很容易去检测NULL指针的使用。

That is usually a null pointer, but it is not guaranteed.

通常是一个空指针，但并不保证总是这样。

First and foremost: it is fine to delete a null pointer.

首先最重要的一点：删除空指标是没有影响的。

What we do is to set that pointer to NULL in the PostNcDestroy.

我们做什么，是集指针 NULL ，在 PostNcDestroy 。

Return 0;} As you can see, what we do here is dereference a NULL pointer.

如你所见，我们在这里做的就是废弃一个NULL指针。

Multifold report forms and statistic diagrams can be generated and the control diagram required for working procedure can be produced.

生成各类统计报表，和统计图，做出工序控制所需的控制图。

The best example of their conservativeness would probably be the case of how they had treated Galileo.

我们从教廷如何对待伽利略就可看出他们对於科学性的新发现是多麼的恐惧。