[Gambas-user] How do I remove an element of a multidimensional array

[Tobias Boege]

On Fri, 05 Dec 2014, Gian wrote:
> Il 05/12/2014 13:42, Martin McGlensey ha scritto:
> > Hello,
> >
> >
> >
> > I need to remove one element of a  multidimensional array. The dimensions
> > are [10, 4]. I want to delete, for example, all elements of array row 1. Can
> > I do this?
> >
> >
> >
> > Marty
> >
> 
> A way not particulary clever? Copy your array in another with one row less.
> Hi
> Gianluigi
> 

And it doesn't get better than this if you stick to what I call "real multi-
dimensional (m-d) arrays". Their bounds (i.e. the number of dimensions and
the size of each dimension) are fixed after you created them. A typical real
m-d array declaration looks like this

  Dim myArray As Integer[Dim1, Dim2, ..., DimN]

If that's the way you declared your array, you can only solve your problem
by copying the wanted data into another, smaller array.

However, there is a second kind of m-d arrays in Gambas which I call "derived
m-d arrays". These are classes constructed by the interpreter at runtime out
of other classes. If you let it create array classes from array classes (and
so forth), you can achieve a m-d layout of your data BUT by using only 1-d
arrays over which you have more operations available, as you know.

An example of a declaration of a derived m-d array is

  Dim myArray As Integer[][]...[] ' As many brackets as you want dimensions

For the rest I must refer you to this thread[0] because the explanation is
a bit lengthy and I don't want to repeat it. Anyway, it turns out that the
derived m-d arrays are *way* more flexible and that you can delete rows,
columns and whatever you call their higher-dimensional analogues more easily.

If there are questions left, don't hesitate.

Regards,
Tobi

[0] http://sourceforge.net/p/gambas/mailman/message/32228140/

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