Re: newbee question...

[Jonathan Adamczewski <jadamcze@...>]

On 19 Oct 2000 KZerbe@t-online.de wrote:

> > How can I implement a USER-friendly method to work with 
> 2-dimensional
> > arrays/matrices. (i.e. create, redim, access elements etc.)? 
> > I'd like to allow my users to do something like:
> > arrayA = array(NumCols, NumRows)   --create array
> > numberB = getval(arrayA, Col, Pos)    --access elements
> > redim(arrayA, ColDelta, RowDelta)   --realloc
> > arrayC = arrayA     -- copy whole array
> > arrayD = arrayA+arrayB   --arithmetic operators
> > 
> > Do I have to use the USERDATA tag for arrayA, arrayB ..., or can I do 
> all
> > this with tables?
> > 
> 
> Forget the unflexibility of "legacy programming languages" like maybe C 
> or BASIC (>>yuck<<).
> You need not to "redimensioning" anything. Just add new elements- or 
> even dimensions. Even don't think about indexes being contigous
> 
> -A table can contain tables, so one solution for two dimensional 
> matrices can be a table of tables
> -you don't have to specify a size ever
> - to cleanup, just assign nil or leave the scope where the table
> is valid, the garbage collector does the rest
> 

Out of curiousity...

> c={1,3}
> print(c[0])
nil
> print(c[1])
1
> print(c[2])
3
>

Why does table indexing begin at 1 and not zero?  I guess this is just a
convention, but I've become accustomed to zero based arrays :)

Thanks

Jonathan.