Re: pred & succ ?

[Martin Schultz <martin.schultz(at)dkrz.de>]

Andrew wrote:
> 
> In article <3A0FA91A.7BEE1D07@dkrz.de>,
>   Martin Schultz <martin.schultz@dkrz.de> wrote:
> >
> > FUNCTION pred, x
> >    RETURN, x-1
> > END
> > FUNCTION succ, x
> >    RETURN, x+1
> > END
> >
> 
> Thanks, Martin.  I take that as a "no", though.
> 
> I was thinking of a general, built-in (thus fast),
> function that returns the successor or predecessor
> of any ordinal variable.
> 
> I knew I could write x-1, etc.. :-)
> 

Well, the point is that x-1 already is quite fast because IDL is array
oriented. I'm not sure whether you could gain anything significant by
having this as a builtin function. 

Cheers,
Martin



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