From: Todd A. Jacobs on 3 Jun 2010 12:04
Ruby has a terrific implementation of single-valued permutations, but it
doesn't yield the results I expected when using arrays of arrays. For
[[1, 2], [2, 3]].permutation.to_a.include? [2, 1]
The reason is that there's no permutation of the sub-arrays, just of the
top-level array elements. Am I overlooking something obvious here? I'd
like the permutations to include randomization within each sub-array,
"Oh, look: rocks!"
-- Doctor Who, "Destiny of the Daleks"
From: botp on 3 Jun 2010 12:59
On Fri, Jun 4, 2010 at 12:04 AM, Todd A. Jacobs
> The reason is that there's no permutation of the sub-arrays, just of the
> top-level array elements.
you assumed that it has *only* sub-arrays
[[1, 2], :a, String, 3].permutation.to_a
> Am I overlooking something obvious here? I'd
> like the permutations to include randomization within each sub-array,
just include permutation of the sub then
kind regards -botp
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