Can the last line in the above extract be written as my @rh_set = $read_set->can_read();?
Yes.

but are there any differences in the results themselves? Is one of them somehow "better" to use than the other?
No difference in results.

In reply to Re: Difference between can_read() and select() in IO::Select by Anonymous Monk
in thread Difference between can_read() and select() in IO::Select by anna_black

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