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Chris
[SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 20:01    #1
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This always returns 0:

rx "say lastpos('abcdabcd', 'b')"


No matter what values I feed in, LASTPOS() always returns 0 which means "not found".

I can't get it to work under OS3.1 either. Has it ever worked? Is there an alternative function?


Edited by Chris on 2014/4/13 20:48:33
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eliyahu
Re: [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 20:13    #2
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@Chris

Quote:
This always returns 0:

rx "say lastpos('abcdabcd', 'b')"


No matter what values I feed in, LASTPOS() always returns 0 which means "not found".

I can't get it to work under OS3.1 either. Has it ever worked? Is there an alternative function?

while i don't know if there is a difference in how it's implemented in AREXX, using ANSI REXX on z/OS, the format is different:

LASTPOS(needle,haystack)
LASTPOS(needle,haystack,offset)

so if it's anything like ANSI REXX, then you'd want your code to be:

rx "say lastpos('b','abcdabcd')"

see if that works.

-- eliyahu
"Physical reality is consistent with universal laws. When the laws do not operate, there is no reality. All of this is unreal."
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zzd10h
Re: [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 20:32    #3
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@eliyahu
I confirm, "lastpos" ARexx works like on z/OS mainframe REXX.
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Chris
Re: [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 20:48    #4
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Wonderful, that works, thanks.

The documentation I always refer to is wrong. Well, the description appears to be correct, but the examples are the other way round.
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broadblues
Re: [SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 21:10    #5
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Which documentation is that?
Blender For OS4.x : Blues : Walker Broad
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Chris
Re: [SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 21:13    #6
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ARexx.guide
I'm not sure where I got it, but it has been my go-to reference for as long as I can remember (which, tbh, is only about as far as last Tuesday tea-time).
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broadblues
Re: [SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 22:01    #7
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@Chris

Okay, just wanted make sure it was anything official.

try:

http://wiki.amigaos.net/index.php/AmigaOS_Manual:_ARexx
Blender For OS4.x : Blues : Walker Broad
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eliyahu
Re: [SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 22:10    #8
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@broadblues

looks like the wiki is correct (link).

-- eliyahu
"Physical reality is consistent with universal laws. When the laws do not operate, there is no reality. All of this is unreal."
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Chris
Re: [SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 22:40    #9
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@broadblues

My AmigaGuide looks suspiciously similar to that, however as eliyahu notes, the wiki is correct.
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Severin
Re: [SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/13 22:59    #10
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@Chris

Try This, I've been using it for years.

ARexx For Beginners (& Others) .guide
Amiga user since 1985
AOS4, A-EON, IBrowse & Alinea Betatester

Ps. I hate the new amigans website. <shudder>
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ssolie
Re: [SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/14 16:51    #11
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@Chris
Quote:
My AmigaGuide looks suspiciously similar to that, however as eliyahu notes, the wiki is correct.

Some day I hope people will use the official documentation wiki as the first source of accurate information.
ExecSG Team Lead
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broadblues
Re: [SOLVED] [ARexx] Is LASTPOS() broken?
Posted on: 2014/4/14 19:59    #12
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@ssolie

Quote:
Some day I hope people will use the official documentation wiki as the first source of accurate information.


I have an animicon on my workbench which links directly to the wikki.
Blender For OS4.x : Blues : Walker Broad
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