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。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。