setting this pointer to null

When you call Release, you pass in the pointer you hold to the object, and ...

When you call Release, you pass in the pointer you hold to the object, and it NULLs it out . and you'll see why setting this to NULL won't work.

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Setting a pointer to 0 (which is "null" in standard C++, the NULL...

Setting a pointer to 0 (which is "null" in standard C++, the NULL define from C is somewhat different) avoids crashes on double deletes.

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In any other case, I always set a pointer to NULL after calling delete on i...

In any other case, I always set a pointer to NULL after calling delete on it. Then setting bar to NULL has just helped hide a bug if there was a.

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The former snippet assigns the next field of the struct pointed to by curre...

The former snippet assigns the next field of the struct pointed to by current to NULL. The second snippet makes the current pointer point at the.

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An object of a class cannot be set to NULL; however, you can set a pointer ...

An object of a class cannot be set to NULL; however, you can set a pointer (which contains a memory address of an object) to NULL. Example.

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So I have 3 pointers to monsters. They all start out as NULL. How should I ...

So I have 3 pointers to monsters. They all start out as NULL. How should I go about setting the pointer back to NULL after that monster dies?

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Setting unused pointers to NULL is a defensive style, protecting against da...

Setting unused pointers to NULL is a defensive style, protecting against dangling pointer bugs. If a dangling pointer is accessed after it is freed.

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It's because the pointer is passed by value and not by reference. If y...

It's because the pointer is passed by value and not by reference. If you want to change the pointer inside the function you need to pass the.

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Double deleting an object can result in the destructor being called twice, ...

Double deleting an object can result in the destructor being called twice, so some people favor setting it to NULL after deletion. This prevents.

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struct structure *elements; elements->pointer = NULL;. elements pointer ...

struct structure *elements; elements->pointer = NULL;. elements pointer points to nowhere. Dereferencing an invalid pointer (elements pointer).

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Don't use memset to initialize a null pointer as this will set the mem...

Don't use memset to initialize a null pointer as this will set the memory to all bits zero which is not guaranteed to be the representation of a null.

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The problem was you were de-referencing a free() 'ed pointer to set Yo...

The problem was you were de-referencing a free() 'ed pointer to set You are setting (glycan+i)->desc to NULL after glycan has been freed.

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I got in the habit of setting pointers to NULL after using a conservative g...

I got in the habit of setting pointers to NULL after using a conservative garbage collector with C code. Having no pointers to unused memory is.

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In the copy constructor you try to delete[] an uninitialized pointer: LFiel...

In the copy constructor you try to delete[] an uninitialized pointer: LField(const LField &clone) { //good code here, then if (val) //.

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This is Undefined Behaviour, and absolutely anything could happen, includin...

This is Undefined Behaviour, and absolutely anything could happen, including appearing to work. This is not reliable!! In this case, it doesn't.

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