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  Dienstag, 15. Oktober 2002

Study tomorrow: Permutations in K.

Combinations returned by {x _draw -x} contain every element from !x exactly once (as opposed to those returned by {x _draw x}).Der österreichische Erfinder des Internets/Erfinder des österreichischen Internets Josef Broukal wird zum sozialistischen Zugpferd. Somewhat amusing. Herr Rinner hofft auf künftige Alsvorlesungsanrechenbarkeit von Modern Times - allein, vergebens: "Ab sofort wird Broukal keine ZiB1-Sendungen mehr moderieren. Eine weitere Konsequenz ist ebenfalls bereits sicher: Nach Jahren wird erstmals nicht Broukal die ORF-Seher durch die Wahlnacht führen." — Damit wäre die letzte sich aus meinen Jugendtagen in die Gegenwart gerettet habenden On-Screen-Konstante der Vergangenheit anheimgefallen.

Zur Feier des Tages empfiehlt die Chefredaktion den Genuss des Broukal'schen Excel/VBA-Kurses für steirische Lehrerinnen und alle anderen auch (obschon der Einleitungstext zu diesem hoffen lässt, Broukal möge nur nicht Justizminster werden, denn: "Zuwiderhandelnde werden gnadenlos verfolgt").

chris 7835 days AGO
From an earlier discussion in the KServer Listbox I have:

comb:{,/x{n,''(+\#:'x)#\:,/1+x}/n:|!y-x-:1}

and

perm:{:[x>1;<:',/(!x),'\:perm[x-1];,0]}

[Note: Some internal vanilla processing must interfere with the
curly braces that naturally occur in the above expressions.]
which I found useful when playing with permutations and combinations. I also have a `short form' for `complete permutations' which I can probably dig up if it is needed.

chris 7835 days AGO
David, thanks for posting those! Curly braces and stars have to be escaped with a backslash. Vanilla isn't too K-friendly ...

To reset comment ownership just edit and store it again.

David Ness 7835 days AGO
Chris,

Thanks for straightening out my K code. I'll remember to backslash stuff next time. As to the `edit and store it again, I don't think I can, as you now `own' the comment---I think. Of course, I don't care so I am happy as it is...

Andreas 7835 days AGO
wg. Broukal: das hier schon gesehen?

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