tjreedy at udel.edu
Thu Sep 1 18:17:53 CEST 2011
On 9/1/2011 11:38 AM, Bruce Leban wrote:
> On Thu, Sep 1, 2011 at 6:19 AM, Peio Borthelle
> <peio.borthelle at gmail.com
> <mailto:peio.borthelle at gmail.com>> wrot
> e.g. I have two images in a gui and they must stay at the same
> position (relatively one to the other) but follow the movements of
> the arrow keys (truthful!).
You put them in a frame so that their positions are relative to a frame
rather than absolute pixel positions. Then you move the frame. Relative
positioning is fundamental to computer graphics.
> What you're saying is you have objects in a gui which must be
> manipulated by simple variables rather than be encapsulated in a class.
The position should be an attribute of a class and relative to something.
> Fortran has a statement called COMMON which aliases variables.
This works because in Fortran a 'variable' is a block of memory. As I
remember, COMMON says to reuse memory for different variables.
> useful for reshaping arrays. Other than that, it's an easy way to
> confuse programmers and the compiler.
Terry Jan Reedy
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