Re: %Trim dilemma

On 1/27/06, Holden Tommy <Tommy.Holden@xxxxxxxxxxxxxxxxx> wrote:
>
> Eval-corr is the preposed opcode.
>
> On-error already exists.



Oh, and let's not forget Z-ADD and Z-SUB.. Those have been swimming in the
deep-end of the RPG pool for quite awhile.

Thanks,
> Tommy Holden
>
>
> -----Original Message-----
> From: rpg400-l-bounces+tommy.holden=hcahealthcare.com@xxxxxxxxxxxx
> [mailto:rpg400-l-bounces+tommy.holden=hcahealthcare.com@xxxxxxxxxxxx] On
> Behalf Of Booth Martin
> Sent: Friday, January 27, 2006 2:42 PM
> To: RPG programming on the AS400 / iSeries
> Subject: Re: %Trim dilemma
>
> This is a new one.  a hyphenated opcode???
>
>
>
> Holden Tommy wrote:
> > <snip> Now let's get on with
> > the real problems in RPG IV, like hyphens in opcode names!
> <vbg></snip>
> >
> > Umm can we at least get the opcodes..  Lol
> >
> > Hyphenated opcodes that work to spec > than no frickin' opcode IMO
> > hehe...
> >
> >
> > Thanks,
> > Tommy Holden
> >
> >
> > -----Original Message-----
> > From: rpg400-l-bounces@xxxxxxxxxxxx
> > [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Bob Cozzi
> > Sent: Friday, January 27, 2006 2:05 PM
> > To: 'RPG programming on the AS400 / iSeries'
> > Subject: **SPAM** RE: %Trim dilemma
> >
> > What's a "NULL Variable"?
> > Do you mean a field that can contain a X'00' or is considered null (as
> > in
> > *NULL in RPG IV)?
> > Does Oracle use null-terminated strings? If so, then a pointer to a
> null
> > value is an empty string. A null pointer is the same in Unix-based C
> as
> > it
> > is in RPG IV, for the most part.
> > Often C compilers map a 0 or X'00' to the word "null".
> > So  if (mystring == null) means, does the field contain a X'00' in
> > position
> > 1 (or offset zero of you're a C person).
> > In RPG IV, you can use %str() to move from/to null-terminated strings.
> > But
> > you're right, there is not "full null support" (whatever that might
> > mean,
> > but I agree that it seems that way).
> >
> > So if the l-value's length is ZERO, how many 9's should it be compared
> > with
> > in order for it to be false? Based the way *ALL'9' works, by matching
> > its
> > corresponding value's length, that would be zero 9's. Hence, they
> would
> > be
> > equal.
> > I've written tons of C code, and often have to check for a null
> > address/ptr
> > as well as a null value (pointing to X'00') to make sure I'm not
> > screwing
> > things up. Doing the following in this case, doesn't seem to strange.
> > I think this is just one of education, and acceptance. Now let's get
> on
> > with
> > the real problems in RPG IV, like hyphens in opcode names! <vbg>
> >
> > if %len(%Trim(myField)) > 0
> >     and %Trim(myField)= *ALL'9'
> > // now we're cookin'
> > endif
> >
> > -Bob Cozzi
> > www.RPGxTools.com
> > RPG xTools - Enjoy programming again.
> >
> >
> > -----Original Message-----
> > From: rpg400-l-bounces@xxxxxxxxxxxx
> > [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
> > On Behalf Of Wilt, Charles
> > Sent: Friday, January 27, 2006 1:52 PM
> > To: RPG programming on the AS400 / iSeries
> > Subject: RE: %Trim dilemma
> >
> > That's debatable, particularly when dealing with a language, like RPG,
> > that doesn't provide full NULL support.
> >
> > If you consider strings to be sets of characters, then you'd consider
> > that in set theory the NULL set and the EMPTY set are one and the
> same.
> >
> > Interesting tidbit, Oracle treats EMPTY strings as NULL strings and
> vice
> > versa.
> >
> > However, given that DB2 doesn't treat NULL strings as EMPTY strings,
> and
> > given that RPG doesn't support NULL variables, I probably should have
> > said empty instead of NULL <grin>
> >
> >
> > Charles Wilt
> > --
> > iSeries Systems Administrator / Developer
> > Mitsubishi Electric Automotive America
> > ph: 513-573-4343
> > fax: 513-398-1121
> >
> >
> >> -----Original Message-----
> >> From: rpg400-l-bounces@xxxxxxxxxxxx
> >> [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of
> >> Matt.Haas@xxxxxxxxxxx
> >> Sent: Friday, January 27, 2006 2:10 PM
> >> To: rpg400-l@xxxxxxxxxxxx
> >> Subject: RE: %Trim dilemma
> >>
> >> This isn't comparing null strings. It's comparing empty
> >> strings which is
> >> very different from null.
> >>
> >> Matt
> >>
> >
>
> --
> -----------------------------------
> Booth Martin
> http://martinvt.com
> -----------------------------------
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