Re^3: Efficient but elegant Cross-Product iterator ?

Well yeah. You necessarily need to store the results of the subs somewhere, and in what else would store the results of the subs but in arrays?

Comment on Re^3: Efficient but elegant Cross-Product iterator ?

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Re^4: Efficient but elegant Cross-Product iterator ? by LanX (Saint) on Jun 20, 2020 at 22:00 UTC
NestedLoops allows to pass code-refs, i.e. they will be dynamically (re-)evaluated each time one loop-level is (re-)entered. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply]
Re^5: Efficient but elegant Cross-Product iterator ? by ikegami (Patriarch) on Jun 20, 2020 at 22:05 UTC
Ah, so it will create the arrays for you, cool. (Added the alternate solution to my earlier post.)	[reply]
Re^6: Efficient but elegant Cross-Product iterator ? by LanX (Saint) on Jun 20, 2020 at 22:12 UTC
It's also semantically different! The subs don't need to return a constant list, so each loop might restart with a new dynamic list. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply]