On 8-6-2011 7:00, Mathieu Dupont wrote:

This following code works, except that the first random is always the same (Analysis) for some reason. Anyone knows why ? \enableregime[il1]\starttext\startluacode userdata = userdata or {} math.randomseed( os.time() ) function userdata.random(...) context(arg[math.random(1, #arg)]) end\stopluacode\def\CHOOSERANDOM#1{\ctxlua{userdata.random(#1)}}\dorecurse{10}{\CHOOSERANDOM{"Maths", "Physics", "Algebra", "Analysis", "Chemistry", "Geometry", "Wave equation", "Schrödinger equation"}\par}\stoptext

Because context remembers the seed (is reported in the log). Delete the tuc file and you will get another value. We could get oscillation otherwise. ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Dear Hans, dear Mathieu, Thank you very much for your quick thoughts and solutions! It is amazing how fast one gets a solution to one's problem on this list… Just a note for Mathieu: I think that \enableregime[il1] is not needed in mkiv, since a unicode regime is the default there (however with mkii I use \enableregime[utf] but in the case we are discussing, one has to use lua, so mkiv is mandatory). Best regards: OK On 8 juin 2011, at 19:00, Mathieu Dupont wrote:

This following code works, except that the first random is always the same (Analysis) for some reason.

Anyone knows why ?

\enableregime[il1] \starttext \startluacode userdata = userdata or {} math.randomseed( os.time() ) function userdata.random(...) context(arg[math.random(1, #arg)]) end \stopluacode \def\CHOOSERANDOM#1{\ctxlua{userdata.random(#1)}} \dorecurse{10}{\CHOOSERANDOM{"Maths", "Physics", "Algebra", "Analysis", "Chemistry", "Geometry", "Wave equation", "Schrödinger equation"}\par} \stoptext

Mathieu

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From: otared@gmail.com Date: Wed, 8 Jun 2011 18:52:36 +0200 To: ntg-context@ntg.nl Subject: [NTG-context] Random selection of a word in a set with lua and mkiv

Hi all,

Assuming that we have a set of words or expressions, say {Maths, Physics, Algebra, Analysis, Chemistry, Geometry, Wave equation, Schrödinger equation} is it possible to write a lua function, named for instance randomselectword which returns one of the words or expressions selected at random in the above set? Indeed this is intended to be used in a TeX file processed with mkiv.

Thanks in advance for any idea and help.

Best regards: OK ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

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