Thanks for that, AnomalousMonk.

"In the first, two different anonymous array references are being constructed. In the second, a single anonymous array reference is constructed and then repeated twice."

So how can we use this concise & convenient "x 2" syntax to generate the former?  I've just proposed a workaround here, but maybe there's a cleaner method.

Update: It looks as if I don't actually need an alternative, because the later should work for my needs, since I'll only be reading it, according to LanX.  But I'm still interested if you know of a concise efficient alternative, which would allow reading & writing.

In reply to Re^8: Combinations of lists, etc by tel2
in thread Combinations of lists to a hash by tel2

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