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There's two cases I shift:
sub some_method { my $self = shift; my ($various, $other, $parameters) = @_; }
and something like
sub process_list { my ($some, $positional, $params) = splice @_, 0, 3; for(@_) { # ... } }

The first case is somewhat arbitrary and maybe a bit superstitious; I just like to consistently always shift off the $self when I'm writing OO code - something about that one parameter's significance makes it feel right to me.

The second case is plain and solid reasoning: I hate to name variables when I don't need to. Temporaries should always hold computed, not copied values, in my opinion. (You also have to work on @_ in case you wanted to modify the passed values - which of course is to be used seldomly and carefully and orthogonal to shifting.)

The second case is an exception of course though not exactly a red herring either.

So in general, I would agree; my (@variables) = @_; is preferred. There are good reasons not to, occasionally, however.

Makeshifts last the longest.


In reply to Re^2: Perl Programming guidlines/rules by Aristotle
in thread Perl Programming guidelines/rules by hakkr

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