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Re: [Bug-apl] ⎕NL 'var_name'

From: Juergen Sauermann
Subject: Re: [Bug-apl] ⎕NL 'var_name'
Date: Wed, 11 Mar 2015 12:28:21 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.4.0

Hi Christian,

there is no problem at all reporting something that looks like a GNU APL fault but turns out
to be a fault in the APL code.

As of today, GNU APL is definitely not 100% error-free, but every trouble report brings us
closer to that point. So please continue reporting.

/// Jürgen

On 03/11/2015 03:15 AM, Christian Robert wrote:
I will try to do that in the future, but it will be hard ;-) please forgive me.

completely out of the current subject, any one saw that video ?


it looks like a 100% "Dialog APL" advertising.

don't ever try to do it in "gnu apl(GPL 3)" nor even in my favorite "nars2000(GPL 3)", it wont work at all, will fail at
the first or second function definition.

but it was really fun to watch.

see you,


On 2015-03-10 22:03, Blake McBride wrote:
I've found that when learning a new system, it is easy to find bugs in it - which turn out to be a misunderstanding on my part. Take it from someone with years experience doing nothing but APL, GNU APL is pretty solid. If you encounter a bug, definitely look closely at your code.

Glad to help.


On Tue, Mar 10, 2015 at 8:49 PM, Christian Robert <address@hidden <mailto:address@hidden>> wrote:

    You are right. QuadNC do the right thing.

btw: this is why I asked for some kind of a "newbie" list for gnu apl. I don't want to bother the developpers at each time *I think* of a problem in the software. 9/10+ are my own ignorance.

    thanks, and still learning from near zero.


    On 2015-03-10 21:09, Blake McBride wrote:

        I think you are confusing ⎕NC and ⎕NL

On Tue, Mar 10, 2015 at 7:16 PM, Christian Robert <address@hidden <mailto:address@hidden> <mailto:address@hidden <mailto:address@hidden>>> wrote:


I'm pretty sure this was working a few days ago to test if a variable has a value or not at entry to a function.

             Is it broken or I miss something ?



             [0]   z←ncpu Time what;⎕io;start;stop;day;old_____ncpu
             [1]   →(1=⎕NL 'ncpu')/already_set
             [2]     ncpu←1 ⍝ the default
             [3]  already_set:
             [4]   ⎕io←0
             [5]   start←¯5↑⎕ts
             [6]   day←start[0]
             [7]   start ← 32 24 60 60 1000 ⊥ start
             [8]   old_ncpu←⎕SYL [25;1]
             [9]   ⍎what
             [10]  stop←¯5↑⎕ts
             [11]  ⎕SYL [25;1]← old_ncpu
             [12]  →(stop[0]=day)/ok
             [13]    stop[0]←stop[0]+1
             [14] ok:
             [15]  stop ← 32 24 60 60 1000 ⊥ stop
[16] z←(⍕(stop-start)÷1000),' seconds at num core = ',(⍕⎕syl[25;1]),' of ', ⍕⎕syl[24;1]
                    Time 'z←⍳1000'
             DOMAIN ERROR
             Time[1]  →(1=⎕NL 'ncpu')/already_set
                           ^           ^

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