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$\begingroup$ Actually, partitions[list,2] on its own appears to do the job just fine and about two times as fast as my solution. Simply use Map[list[[#]]&,partitions[Range... as I mentioned under ciao's answer. $\endgroup$

LLlAMnYP
– LLlAMnYP

2015-07-14 14:14:11 +00:00
Commented Jul 14, 2015 at 14:14
$\begingroup$ @LLlAMnYP That sounds like a much better idea. I'll write it up later and replace this mess. Thank you! $\endgroup$

Mr.Wizard
– Mr.Wizard

2015-07-15 00:12:22 +00:00
Commented Jul 15, 2015 at 0:12
$\begingroup$ ciao also warns that Map is quite slow to replace indices with elements, but see the comment thread under his answer for details :-) $\endgroup$

LLlAMnYP
– LLlAMnYP

2015-07-15 00:30:30 +00:00
Commented Jul 15, 2015 at 0:30

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