Beginner's Guide to NetRexx

[David Requena]

Yes, options specified in source code take precedence over the ones specified at the compiler command line.
Obviously not all command line settings can be be specified as option in sources though.

El 04/11/2010 0:04, Kermit Kiser escribió:

That sounds great! Do the Options settings in the source code override the ones in the panel?

On 11/3/2010 3:29 PM, David Requena wrote:

Agreed.
It confuses even me to the point I usually leave all of them at defaults and set desired options in my sources.

It's even worse due to mixed enabled/disable defaults.
I think Satguru did it like this because it's trivial in code to get at options and append them to the compiler command line this way.

The whole UI is being reworked now and this is one of the things changing. From now on, options panel will be a list of affirmative option descriptions with a checkbox like:

- Emit formatted java code
- Move comments to java code
- Display compiler logo
- Display compilation time information
- etc

Default enabled options will initially be checked while default disabled ones will be unchecked. My be a "Set defaults" button will also be there.

Hope that makes for a much clearer user interface to options selection. Of course suggestions are welcome.

That said I personally prefer setting compiler options in source code as this makes it less likely to have broken compilations in a different environment with disparate options set. In particular binary/nobinary tend to cause lots of issues in this regard.


El 03/11/2010 21:43, Kermit Kiser escribió:

David -

I know what those options mean and why the interface shows them that way, but it still confuses the h*** out of me! I recommend scrapping that panel and building a completely new interface to set those options.

-- Kermit


On 11/3/2010 9:26 AM, David Requena wrote:

Bob,

The label reads "Select default Compiler Options to be overridden".
So when you select to override 'noformat' you effectively get 'format'.
Same applies to 'nocomments' which is the default. If you override 'nocomments' you get 'comments'.

I admit this is somewhat confusing.
This comes from the original NetRexxJe code and I never got to change it as I didn't want to confuse even more the users that were used to this behaviour in previous revisions.

El 03/11/2010 16:42, Robert Hamilton escribió:

But when I check noformat do I get formatted JAVA or do I get UNFormatted JAVA.  When I check NoComments  I get Comments.  This is illogical to me; maybe not to JAVA people.

BobH

On Wed, Nov 3, 2010 at 7:56 AM, David Requena <[hidden email]> wrote:

Yes, Bob

The default option is to nicely format the resulting java. This makes it more readable.
On the other hand line numbers in stack traces won't correspond to line numbers in you NetRexx source code.
When you use noformat the outcome is the inverse.

---
Saludos / Kind regards.
David Requena

El 03/11/2010 11:34, Robert Hamilton escribió:

Found 'noformat' so I check noformat to get formatting.  I guess that's not weird to JAVA folks, but it confusing to me.

Bobh

On Wed, Nov 3, 2010 at 5:27 AM, Robert Hamilton <[hidden email]> wrote:

I second that. . .

Is there a way to change the formatting of the JAVA code -- If that's what you call the -KEEP stuff ???

bobh

PS: also got

Exception in thread "main" java.lang.NullPointerException
    at COM.ibm.netrexx.process.NetRexxC.process(NetRexxC.nrx:212)
    at COM.ibm.netrexx.process.NetRexxC.main2(NetRexxC.nrx:123)
    at COM.ibm.netrexx.process.NetRexxC.main(NetRexxC.nrx:82)

from the red flashing msg tab after the abort msg appeared

bobh.

 

On Wed, Nov 3, 2010 at 5:11 AM, David Requena <[hidden email]> wrote:

IMHO it would be much easier if the tspecification explicitly stated tha in the reference implementation:

1 - automatic conversion is performed between String and Rexx types and vice versa.

2 - in the context of "say" and "parse" instructions any type (class) will get its toString() method called (via String.valueOf() in parse's case). Then the resulting String representation will be converted to Rexx as per rule 1 above.

3 - No other conversions are implicitly performed by the language processor.

As things are now, nothing in the specification explains why or how things like "say Date()" or "parse Date() foo bar" do actually work.

Again IMHO peeking at the java intermediate code, while being a worthy exercise, shouldn't be the only way to know what's going on.

-
Saludos / Kind regards,
David Requena

-----Original Message-----

From: René Jansen <[hidden email]>
Sender: [hidden email]

Date: Wed, 3 Nov 2010 10:03:42
To: IBM Netrexx<[hidden email]>
Reply-To: IBM Netrexx <[hidden email]>
Subject: Re: [Ibm-netrexx] Beginner's Guide to NetRexx

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[Kermit Kiser]

Sorry - on closer look, the temp data is in the source document. The code to extract it is like this:

pagereader=BufferedReader(InputStreamReader(InputStream URL(arg).getcontent ))
loop forever
   line=pagereader.readLine
   if line = null then leave
   if Rexx(line).pos('pwsid="SABE" pwsunit="english" pwsvariable="tempf"') =0 then iterate
   parse line . "value=" temp ">" .
   say temp
   end

On 11/3/2010 3:49 PM, Kermit Kiser wrote:

Fernando --

The code for reading the HTML content is slightly more complex and I am not sure that it is appropriate for an introduction, but I have added it for the purpose of discussion. Here is that code:

pagereader=BufferedReader(InputStreamReader(InputStream URL(arg).getcontent ))
loop forever
   line=pagereader.readLine
   if line = null then exit 0
   say line
   end

I am not sure if the data you want is actually in the high level page you mentioned as it seems to be a lot of Javascript code, but if it is there, it should be fairly easy to add a parse and check to the above snippet to find it.

-- Kermit


On 11/3/2010 1:59 PM, Fernando Cassia wrote:

On Wed, Nov 3, 2010 at 5:26 PM, Kermit Kiser [hidden email] wrote:

Hi Fernando -

Could you clarify that request slightly? Exactly what would you like to know
how to do?

I´m just saying that in this age of web-enabled apps, a sample code
snippet for requesting HTML from a remote URL (ie
http://www.wunderground.com/global/stations/87582.html ) and parsing
the received html using rexx / netrexx to obtain the current
temperature, would be of great help.

Most language tutorials in the 1990s focused on local files. These
days, most apps get data from the "cloud".

FC

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[Mike Cowlishaw]

Sounds good .. one minor tweak: change 'move' to 'copy'  (user might think the coments are removed from the NetRexx, otherwise :-).

 

Mike

The whole UI is being reworked now and this is one of the things changing. From now on, options panel will be a list of affirmative option descriptions with a checkbox like:

- Emit formatted java code
- Move comments to java code
- Display compiler logo
- Display compilation time information
- etc

Default enabled options will initially be checked while default disabled ones will be unchecked. My be a "Set defaults" button will also be there.

Hope that makes for a much clearer user interface to options selection. Of course suggestions are welcome.

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[David Requena]

Oh, exact wording to be revised :-)

I'll be extracting these from options descriptions at the docs.

BTW some does know if Thunderbird might be playing games with my spelling? I can't believe I wrote "maybe" as "my be"!

-
Saludos / Kind regards,
David Requena

-----Original Message-----
From: "Mike Cowlishaw" <[hidden email]>
Sender: [hidden email]
Date: Thu, 4 Nov 2010 07:53:08
To: 'IBM Netrexx'<[hidden email]>
Reply-To: IBM Netrexx <[hidden email]>
Subject: RE: [Ibm-netrexx] Beginner's Guide to NetRexx

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[measel]

Most pages aren’t all text, so another example:

 

method mammoth(urlName=Rexx) static signals MalformedURLException,FileNotFoundException,IOException returns String

 

  urln=URL(urlName)

  outfilename = String "\\output.zip"

  outdata = DataOutputStream(FileOutputStream(outfilename))

 

  in = BufferedInputStream(urln.openStream())

  

  instream = DataInputStream(in)

  loop forever

    onebyte = instream.readByte()

    outdata.writeByte(onebyte)

    catch e=EOFException

     /*   say e.getMessage()  */

                in.close()   

    end

 

  outdata.close()

 

return outfilename

 

From: [hidden email] [mailto:[hidden email]] On Behalf Of Kermit Kiser
Sent: Wednesday, November 03, 2010 5:49 PM
To: IBM Netrexx
Subject: Re: [Ibm-netrexx] Beginner's Guide to NetRexx

 

Fernando --

The code for reading the HTML content is slightly more complex and I am not sure that it is appropriate for an introduction, but I have added it for the purpose of discussion. Here is that code:

pagereader=BufferedReader(InputStreamReader(InputStream URL(arg).getcontent ))
loop forever
   line=pagereader.readLine
   if line = null then exit 0
   say line
   end

I am not sure if the data you want is actually in the high level page you mentioned as it seems to be a lot of Javascript code, but if it is there, it should be fairly easy to add a parse and check to the above snippet to find it.

-- Kermit


On 11/3/2010 1:59 PM, Fernando Cassia wrote:

On Wed, Nov 3, 2010 at 5:26 PM, Kermit Kiser [hidden email] wrote:

Hi Fernando -

Could you clarify that request slightly? Exactly what would you like to know

how to do?

I´m just saying that in this age of web-enabled apps, a sample code

snippet for requesting HTML from a remote URL (ie

http://www.wunderground.com/global/stations/87582.html ) and parsing

the received html using rexx / netrexx to obtain the current

temperature, would be of great help.

Most language tutorials in the 1990s focused on local files. These

days, most apps get data from the "cloud".

FC

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[Patrick Forhan]

On Wed, Nov 3, 2010 at 3:37 PM, Kermit Kiser <[hidden email]> wrote:
> Thanks for the input Patrick.
>
> At this time, the audience for this document seems to be those who have
> little to no experience with NetRexx and Java and perhaps little experience
> with programming generally.

If that is true, then I would minimize any reference to java in such a
document.  A detailed discussion about Java won't help newcomers.
It's certainly a more advanced topic.

> I can see the value of separate tracks for Java
> programmers and for Rexx programmers, but I doubt that I would have the time
> or background to create them.

Well, I'd be happy to contribute to a Java page.  I've been teasing my
co-workers for years about it.

> We will need a WIKI location first, I think.

Again, I'd be happy to temporarily or permanently host a wiki.  In
fact, it's so easy I went ahead and made one at
http://netrexx.muddyhorse.com/

Pat.

--
Defy mediocrity.
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[David Requena]

Just noted that www.netrexx.org already went alive.

Although not yet active there's a wiki section.

"this message has been removed", René? :-)

 

2010/11/4 Patrick Forhan <[hidden email]>

On Wed, Nov 3, 2010 at 3:37 PM, Kermit Kiser <[hidden email]> wrote:
> Thanks for the input Patrick.
>
> At this time, the audience for this document seems to be those who have
> little to no experience with NetRexx and Java and perhaps little experience
> with programming generally.

If that is true, then I would minimize any reference to java in such a
document.  A detailed discussion about Java won't help newcomers.
It's certainly a more advanced topic.

> I can see the value of separate tracks for Java
> programmers and for Rexx programmers, but I doubt that I would have the time
> or background to create them.

Well, I'd be happy to contribute to a Java page.  I've been teasing my
co-workers for years about it.

> We will need a WIKI location first, I think.

Again, I'd be happy to temporarily or permanently host a wiki.  In
fact, it's so easy I went ahead and made one at
http://netrexx.muddyhorse.com/

Pat.

--
Defy mediocrity.

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--
Saludos / Regards,
David Requena


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[Fernando Cassia-2]

On Thu, Nov 4, 2010 at 8:00 AM, Measel, Mike <[hidden email]> wrote:

> Most pages aren’t all text, so another example:
>
>
>
> method mammoth(urlName=Rexx) static signals
> MalformedURLException,FileNotFoundException,IOException returns String
>
>
>
>   urln=URL(urlName)
>
>   outfilename = String "\\output.zip"
>
>   outdata = DataOutputStream(FileOutputStream(outfilename))
>
>
>
>   in = BufferedInputStream(urln.openStream())
>
>
>
>   instream = DataInputStream(in)
>
>   loop forever
>
>     onebyte = instream.readByte()
>
>     outdata.writeByte(onebyte)
>
>     catch e=EOFException
>
>      /*   say e.getMessage()  */
>
>                 in.close()
>
>     end
>
>
>
>   outdata.close()
>
>
>
> return outfilename

That´s clear enough for me, Mike!. Thanks!

FC

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[George Hovey-2]

Re Rene's site.  The slogan is pretty good, but wouldn't "strong typing with less typing " be a bit punchier? (considered, but rejected, "strong typing for weak typists" ;) ).  Also, it's kind of crude from a graphic design standpoint.

On Thu, Nov 4, 2010 at 11:04 AM, David Requena <[hidden email]> wrote:

Just noted that www.netrexx.org already went alive.

Although not yet active there's a wiki section.

"this message has been removed", René? :-)

 

2010/11/4 Patrick Forhan <[hidden email]>

On Wed, Nov 3, 2010 at 3:37 PM, Kermit Kiser <[hidden email]> wrote:
> Thanks for the input Patrick.
>
> At this time, the audience for this document seems to be those who have
> little to no experience with NetRexx and Java and perhaps little experience
> with programming generally.

If that is true, then I would minimize any reference to java in such a
document.  A detailed discussion about Java won't help newcomers.
It's certainly a more advanced topic.

> I can see the value of separate tracks for Java
> programmers and for Rexx programmers, but I doubt that I would have the time
> or background to create them.

Well, I'd be happy to contribute to a Java page.  I've been teasing my
co-workers for years about it.

> We will need a WIKI location first, I think.

Again, I'd be happy to temporarily or permanently host a wiki.  In
fact, it's so easy I went ahead and made one at
http://netrexx.muddyhorse.com/

Pat.

--
Defy mediocrity.

_______________________________________________
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[hidden email]

--
Saludos / Regards,
David Requena


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[rvjansen]

George,

glad you noticed. I agree, but it is not the canonical text, I think that is Mike's. Yes, you are right about the graphics  - at least I will have the opportunity to change them both at once.

With these sites, the problem is to wait until it is acceptable, in which case it will take a really long time, or just put it online. I think the resurfacing of Pierantonio's tutorial warranted the immediate switching on of the site.

I am still wrestling with the choice of a a wiki. The ones I like are php, but of course I would like them to be NetRexx or at least Java. It has my attention however, and the wiki, maybe an interim one, will soon be there.

best regards,

René.

On 4 nov 2010, at 18:50, George Hovey wrote:

Re Rene's site.  The slogan is pretty good, but wouldn't "strong typing with less typing " be a bit punchier? (considered, but rejected, "strong typing for weak typists" ;) ).  Also, it's kind of crude from a graphic design standpoint.

On Thu, Nov 4, 2010 at 11:04 AM, David Requena <[hidden email]> wrote:

Just noted that www.netrexx.org already went alive.

Although not yet active there's a wiki section.

"this message has been removed", René? :-)

 

2010/11/4 Patrick Forhan <[hidden email]>

On Wed, Nov 3, 2010 at 3:37 PM, Kermit Kiser <[hidden email]> wrote:
> Thanks for the input Patrick.
>
> At this time, the audience for this document seems to be those who have
> little to no experience with NetRexx and Java and perhaps little experience
> with programming generally.

If that is true, then I would minimize any reference to java in such a
document.  A detailed discussion about Java won't help newcomers.
It's certainly a more advanced topic.

> I can see the value of separate tracks for Java
> programmers and for Rexx programmers, but I doubt that I would have the time
> or background to create them.

Well, I'd be happy to contribute to a Java page.  I've been teasing my
co-workers for years about it.

> We will need a WIKI location first, I think.

Again, I'd be happy to temporarily or permanently host a wiki.  In
fact, it's so easy I went ahead and made one at
http://netrexx.muddyhorse.com/

Pat.

--
Defy mediocrity.

_______________________________________________
Ibm-netrexx mailing list
[hidden email]

--
Saludos / Regards,
David Requena


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[George Hovey-2]

Rene,
I was just thinking aloud -- I didn't think any urgent action is required.

In case it's of use I've attached a PDF of the tutorial (assuming it is not too large - 1 MB).
George

On Thu, Nov 4, 2010 at 7:23 PM, René Jansen <[hidden email]> wrote:

George,

glad you noticed. I agree, but it is not the canonical text, I think that is Mike's. Yes, you are right about the graphics  - at least I will have the opportunity to change them both at once.

With these sites, the problem is to wait until it is acceptable, in which case it will take a really long time, or just put it online. I think the resurfacing of Pierantonio's tutorial warranted the immediate switching on of the site.

I am still wrestling with the choice of a a wiki. The ones I like are php, but of course I would like them to be NetRexx or at least Java. It has my attention however, and the wiki, maybe an interim one, will soon be there.

best regards,

René.

On 4 nov 2010, at 18:50, George Hovey wrote:

Re Rene's site.  The slogan is pretty good, but wouldn't "strong typing with less typing " be a bit punchier? (considered, but rejected, "strong typing for weak typists" ;) ).  Also, it's kind of crude from a graphic design standpoint.

On Thu, Nov 4, 2010 at 11:04 AM, David Requena <[hidden email]> wrote:

Just noted that www.netrexx.org already went alive.

Although not yet active there's a wiki section.

"this message has been removed", René? :-)

 

2010/11/4 Patrick Forhan <[hidden email]>

On Wed, Nov 3, 2010 at 3:37 PM, Kermit Kiser <[hidden email]> wrote:
> Thanks for the input Patrick.
>
> At this time, the audience for this document seems to be those who have
> little to no experience with NetRexx and Java and perhaps little experience
> with programming generally.

If that is true, then I would minimize any reference to java in such a
document.  A detailed discussion about Java won't help newcomers.
It's certainly a more advanced topic.

> I can see the value of separate tracks for Java
> programmers and for Rexx programmers, but I doubt that I would have the time
> or background to create them.

Well, I'd be happy to contribute to a Java page.  I've been teasing my
co-workers for years about it.

> We will need a WIKI location first, I think.

Again, I'd be happy to temporarily or permanently host a wiki.  In
fact, it's so easy I went ahead and made one at
http://netrexx.muddyhorse.com/

Pat.

--
Defy mediocrity.

_______________________________________________
Ibm-netrexx mailing list
[hidden email]

--
Saludos / Regards,
David Requena


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[KP Kirchdörfer]

Am Freitag, 5. November 2010, 00:23:44 schrieben Sie:

> George,
>
> glad you noticed. I agree, but it is not the canonical text, I think that
> is Mike's. Yes, you are right about the graphics  - at least I will have
> the opportunity to change them both at once. With these sites, the problem
> is to wait until it is acceptable, in which case it will take a really
> long time, or just put it online. I think the resurfacing of Pierantonio's
> tutorial warranted the immediate switching on of the site.
>
> I am still wrestling with the choice of a a wiki. The ones I like are php,
> but of course I would like them to be NetRexx or at least Java. It has my
> attention however, and the wiki, maybe an interim one, will soon be there.

It's not NetRexx and not Java, but what about memowiki  - at least part of the
rexx family?

kp
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[Jeff Hennick]

Unfortunately, Mr. Cowlishaw says: "Please note that these programs are
only available within IBM at present – sorry. " (
http://speleotrove.com/memowiki/ ). Let's not wait for this one to be
released!

On 11/4/2010 8:07 PM, KP Kirchdoerfer wrote:
> It's not NetRexx and not Java, but what about memowiki  - at least part of the
> rexx family?
>
> kp
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[Mike Cowlishaw]

 
> Unfortunately, Mr. Cowlishaw says: "Please note that these
> programs are only available within IBM at present - sorry. "
> ( http://speleotrove.com/memowiki/ ). Let's not wait for this
> one to be released!

Actually this one I do have a licence to release for non-commercial use :-).
Mostly haven't released the source because I don't want a full-time job
supporting/adding features on it.   I have a wishlist as long as my arm for it
already :-).

It would only be suitable for an 'owned' server because it uses GoServe, not a
generic server such as Apache.

Mike

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[Thomas.Schneider.Wien]

Hello Mike,

you really are a *computer giant* :-)

may I use your MemoWiki at www.thsitc.com ?

It's a .com page by history, but I am in process to open source all of
my software
there ...

Thomas Schneider.
==============================================================
Am 05.11.2010 08:40, schrieb Mike Cowlishaw:

>
>> Unfortunately, Mr. Cowlishaw says: "Please note that these
>> programs are only available within IBM at present - sorry. "
>> ( http://speleotrove.com/memowiki/ ). Let's not wait for this
>> one to be released!
> Actually this one I do have a licence to release for non-commercial use :-).
> Mostly haven't released the source because I don't want a full-time job
> supporting/adding features on it.   I have a wishlist as long as my arm for it
> already :-).
>
> It would only be suitable for an 'owned' server because it uses GoServe, not a
> generic server such as Apache.
>
> Mike
>
> _______________________________________________
> Ibm-netrexx mailing list
> [hidden email]
>
>

--
Thomas Schneider Projects ReyC & LOGOS on www.KENAI.com
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[Mike Cowlishaw]

Guess you didn't read my post ...

Mike

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of
> Thomas Schneider
> Sent: 07 November 2010 13:41
> To: IBM Netrexx
> Subject: Re: [Ibm-netrexx] MemoWiki
>
> Hello Mike,
>
> you really are a *computer giant* :-)
>
> may I use your MemoWiki at www.thsitc.com ?
>
> It's a .com page by history, but I am in process to open
> source all of my software there ...
>
> Thomas Schneider.
> ==============================================================
> Am 05.11.2010 08:40, schrieb Mike Cowlishaw:
> >
> >> Unfortunately, Mr. Cowlishaw says: "Please note that these
> programs
> >> are only available within IBM at present - sorry. "
> >> ( http://speleotrove.com/memowiki/ ). Let's not wait for
> this one to
> >> be released!
> > Actually this one I do have a licence to release for
> non-commercial use :-).
> > Mostly haven't released the source because I don't want a
> full-time job
> > supporting/adding features on it.   I have a wishlist as
> long as my arm for it
> > already :-).
> >
> > It would only be suitable for an 'owned' server because it uses
> > GoServe, not a generic server such as Apache.
> >
> > Mike
> >
> > _______________________________________________
> > Ibm-netrexx mailing list
> > [hidden email]
> >
> >
>
>
> --
> Thomas Schneider Projects ReyC & LOGOS on www.KENAI.com
> _______________________________________________
> Ibm-netrexx mailing list
> [hidden email]
>

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