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Re^3: On quoting the lhs of '=>'

by goibhniu (Hermit)
on Jul 09, 2008 at 15:35 UTC ( #696478=note: print w/replies, xml ) Need Help??

in reply to Re^2: On quoting the lhs of '=>'
in thread On quoting the lhs of '=>'

The way I read the perldoc quote posted by parv (but I'm no expert), the compiler says "Hmmmm, we have +BIRD. I have no idea what BIRD is (haven't decided yet), but no matter what it is, but there's this unary + in front of it. Lessee, that + isn't between a function and a list of arguments, so it must have no effect whatsoever. That leaves us with a bareword BIRD; I know what to do with that."

#my sig used to say 'I humbly seek wisdom. '. Now it says:
use strict;
use warnings;
I humbly seek wisdom.

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[Discipulus]: if more than 3 go for named variables LA
[Lady_Aleena]: Discipulus, it is at 2 now, but with what I am thinking about, it could go to 3. However, only 1 is needed. The second and third are optional.
[shmem]: straight list or named parameters - that depends on whether (and how many) optional arguments you have
[Discipulus]: if so a plain list is ok, imho
[Lady_Aleena]: shmem, I already have the plugin installed, just not active.
[shmem]: if you have 1 optional argument, place that at the end of the list. If you have more, go for named parameters.
[Lady_Aleena]: 1 manditory, 2 optional.
[Discipulus]: my ($need,$opta,$optb ) = @_; .. if $opta..
[shmem]: all else leads to trouble, even if the third argument depends on the existence of the second. That may become brittle.
[Discipulus]: but if have case like subname(15,undef,3 ) maybe bettere named parameters

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