f=.(#~ ([: */ 1 = +/&(=/~))"1)@(# #: [: i. ^~)
2 f 4
0 1
0 2
0 3
1 0
1 2
1 3
2 0
2 1
2 3
3 0
3 1
3 2
Den 21:30 fredag den 8. december 2017 skrev Jimmy Gauvin
<[email protected]>:
There is a recent thread you might be interested in:
http://jsoftware.com/pipermail/programming/2017-August/048275.html
I like this one from Arie Groeneveld
vari =: 4 :'y,/@:(],"1 0 -."1)^:(x-1) ,.y'
2 vari 'abc'
ab
ac
ba
bc
ca
cb
2 vari i.4
0 1
0 2
0 3
1 0
1 2
1 3
2 0
2 1
2 3
3 0
3 1
3 2
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