Pointers

[Bob Sneidar]

When I was learning Pascal, I discovered that a handle was a pointer to a pointer. When I learned why that had to be, I decided to stick with Hypercard. :-)

Bob S


> On Oct 9, 2016, at 18:12 , JB <sundown at pacifier.com> wrote:
> 
> Livecode has imported foundation which gives users
> the ability to access those libraries and it was written
> you can use pointers.  Pointers are used in both C &
> objective-C.  You write them a little different but the
> basic concept is the same.  A pointer points to a
> location in memory.  A variable is an object which the
> pointer points to.  If variable X holds the integer 34 &
> is located in the memory stack at 4217 the pointer will
> simply hold that address which points you to 4217 in
> memory so you can access and change the contents
> of the memory at 4217 which is the object named X
> and it is a variable of the type int or another type.
> 
> To efficiently write code using pointers you need a
> good understanding of them.  Here is a link to one
> of the best tutorials I have seen on pointers;
> 
> http://pw1.netcom.com/~tjensen/ptr/pointers.htm
> 
> This is written for beginners but it is so good even
> many advanced programmers with a good knowledge
> of pointers will benefit greatly from reading it.
> 
> JB
> 
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