Re: This is confusing me. What are these lines of code doing?

[Booth Martin <booth@xxxxxxxxxxxx>]

Would we have the same results if the code had been:
 D CollSO_DS       DS
 D CollTxt                       60    DIM(5)
 D CollCode

and used CollTxt(n) instead of CollTxt1 through CollTxt5?



Mel Rothman wrote:
> What makes this confusing, I think, is that it used "from - to" to define the fields' 
> positions instead of lengths and the overlay keyword.
>
> I would have coded it like this:
>
> D CollSO_DS       DS
> D CollCode                       3
> D  CollTxt1                     60
> D  CollTxt2                     60
> D  CollTxt3                     60
> D  CollTxt4                     60
> D  CollTxt5                     60
> D  CollTxt                      60    DIM(5) overlay(CollSO_DS:4)
>
>
> Mel Rothman
> Mel Rothman, Inc.
>
>
> Booth Martin wrote:
> > D CollSO_DS       DS
> > D CollTxt                       60    DIM(5)
> > D  CollTxt1               1     60
> > D  CollTxt2              61    120
> > D  CollTxt3             121    180
> > D  CollTxt4             181    240
> > D  CollTxt5             241    300
> > D CollCode              301    303
> >
> > This is confusing me.  What are these lines of code doing?  How long is
> > the data structure CollSO?  What happens if I increase the DIM from 5 to 10?