langreiter.com plain, simple: comment-2002-10-15-1

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comment-2002-10-15-1

CREATED BY David Ness • LAST EDITED BY chris 7857 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.