Permutations by swapping: Difference between revisions
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Line 747:
=={{header|Nimrod}}==
<lang nimrod># iterative Boothroyd method
iterator permutations*[T](ys: openarray[T]): tuple[perm: seq[T], sign: int] =
var
d = 1
Line 772:
inc c[d]
if isMainModule:
for i in permutations([0,1,2]):
echo i
echo ""
for i in permutations([0,1,2,3]):
echo i</lang>
Output:
<pre>(perm: @[0, 1, 2], sign: 1)
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