I understand that the prototype sub f ($) {} makes sure f is called with exactly one argument. I know I can't have formal args, but can use my ($a, $b) = @_ instead (or shift @_)

I know what $_ is used for, the way it gets its value in while (<>) and the way it is used implicitly in m/PATTERN/ and chomp. But I see that it can be used instead of function arguments (e.g. map prefers such functions). And I was asking if that was a preferred style.

In reply to Re^2: $_ functions vs argument-using functions by pldanutz
in thread $_ functions vs argument-using functions by pldanutz

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