Re (4): where do you put your subs

The parens/ampersand are not much of a problem...

I just wanted to point out that there is a side effect to not using parens on a subroutine/method call: the called subroutine "inherits" the @_ array of the caller. While most of you are probably aware of this it is something that can have some unintended consequences - hence my preference for always using the parens on subroutine calls.

Michael

Comment on Re (4): where do you put your subs

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Re: Re (4): where do you put your subs by Juerd (Abbot) on Mar 08, 2002 at 21:08 UTC
I just wanted to point out that there is a side effect to not using parens on a subroutine/method call: the called subroutine "inherits" the @_ array of the caller. Not entirely true. While `&foo` passes `@_`, `foo` and `foo()` and `&foo()` do not. Hence, imho for not passing `@_` the best solution is to avoid the ampersand where possible (which means you pretty much only use it to create references). Proof: `sub test { print "\@_: @_\n"; } @_ = qw(a b c); print 'test; # '; test; print '&test; # '; &test; print 'test(); # '; test(); print '&test(); # '; &test(); __END__ test; # @_: &test; # @_: a b c test(); # @_: &test(); # @_:` [download] 44696420796F7520732F2F2F65206F 7220756E7061636B3F202F6D736720 6D6521203A29202D2D204A75657264	[reply] [d/l]
Re: Re: Re (4): where do you put your subs by demerphq (Chancellor) on Mar 12, 2002 at 13:23 UTC
And then there is also the magical `goto &foo;` [download] But maybe we shouldnt go there... ;-) Yves / DeMerphq -- When to use Prototypes? Advanced Sorting - GRT - Guttman Rosler Transform	[reply] [d/l]
Re: Re: Re (4): where do you put your subs by mpeppler (Vicar) on Mar 08, 2002 at 21:17 UTC
My perl {3,4} training is showing, obviously... :-) Thanks for the correction. Michael	[reply]