Yes. It seems the APL2 example code is not very good. If an error occurs, you really don't want to just continue running. :-)
Regards, Elias On 5 August 2014 18:23, Juergen Sauermann <juergen.sauerm...@t-online.de> wrote: > Hi Elias, > > it was available ,but behaves differently. ⎕ES stops execution > while the ERR function only displays an error if it occurs. > > /// Jürgen > > > > > On 08/05/2014 06:42 AM, Elias Mårtenson wrote: > > Thank you. I see now how it works. Personally, I'd use Quad-ES to set an > error state instead. Was Quad-ES available on APL2? > > Regards, > Elias > > > On 5 August 2014 01:42, Juergen Sauermann <juergen.sauerm...@t-online.de> > wrote: > >> Hi Elias, >> >> ERR is indeed a function, defined on page 49 of that document. >> >> /// Jürgen >> >> >> >> On 08/04/2014 08:13 AM, Elias Mårtenson wrote: >> >> I was browsing the APL2 documentation, and came across the following code >> (page 56, on the PDF here >> <http://publibfp.boulder.ibm.com/epubs/pdf/h2110720.pdf>): >> >> [0] Z←NAME GETW N >> [1] ⍝ GET ITEMS N FROM THE TABLE NAMED NAME >> [2] Z←'' >> [3] →('NOT A VALID TABLE NAME' *ERR*~(⊂NAME)∊TABLES)/0 >> [4] TAB←⍎NAME >> [5] B←N∊TAB[;1] >> [6] →0ρ('ITEM(S)'((~B)/N)'NOT FOUND')*ERR*~^/B >> [7] →(~∨/B)/0 ⍝ EXIT IF NONE FOUND >> [8] Z←(TAB[;1]∊N)⌿›TAB >> >> What is ERR here? It seems like a function that sets some error state? >> It certainly looks like something useful to have. I can't think of any way >> I could build this myself though. >> >> Regards, >> Elias >> >> >> > >
