On Thu, Jun 27, 2013 at 1:31 PM, Dr.Ruud <rvtol+use...@isolution.nl> wrote:
> On 27/06/2013 22:01, Shawn H Corey wrote:
>
>> On Thu, 27 Jun 2013 21:53:46 +0200
>> "Dr.Ruud" <rvtol+use...@isolution.nl> wrote:
>>
> See also 'Statement Modifiers' in perlsyn.
>>> There it is shown how to make next and last work with do{}. I read
>>> that as a rather funny way to discourage people from do-ing it.
>>>
>> "Here be dragons." I would say that was a warning to avoid it
>> altogether.
>>
>
> The "Here be dragons." there, is about something different, namely the "my
> $x if ... ;" type of code.
> (at least in the version I last read, 5.14.2
>
>
True. But, "do" should probably draw a more explicit caution in the docs
since there are less tricky ways in most cases.
However, there may be a few places when 'do' isn't always a don't :)
'do' might be a shorter, more readable idiom in the sense of "do something
until a condition occurs":
perl -e 'do {$in =<>; ... } until $in =~ /q/'
vs.
perl -e 'while ( $in = <>; ... ) { ... last if $in =~ /q/}'
--
Charles DeRykus
