perm=: 3 : 0 z=. i.1 0
for. i.y do. z=.,/(0,.1+z){"2 1\:"1=i.>:{:$z end.
)
perm 3
0 1 2
0 2 1
1 0 2
1 2 0
2 0 1
2 1 0
NB. for. T do. B end.
i.3
0 1 2
How does this work? When is 0 1 2 true? How often does "B" get
executed?
Linda
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