Re^3: Sort mechanics problems with objects and potentially contradicting comparisons (would cause infinite loop)

If you pass $a and $b explicitly, you might be able to reuse that sub outside of sort. The "efficiency" of the implicit $a and $b is not really a big deal.

$obj->_compare($a,$b)

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Re^4: Sort mechanics problems with objects and potentially contradicting comparisons (would cause infinite loop) by anonymized user 468275 (Curate) on Jun 01, 2016 at 16:21 UTC
It's not about efficiency. If $a and $b can't be relied on, any such use of the sort mechanism becomes definitively non-standard and the sort keyword would have to be avoided. One world, one people	[reply]
Re^5: Sort mechanics problems with objects and potentially contradicting comparisons (would cause infinite loop) by Anonymous Monk on Jun 01, 2016 at 16:26 UTC
They can be relied on, but they have scoping problems and can be confusing when your program spans multiple packages (see hakuex's edit).	[reply]