Re: Surpised by foreach iterator limitation

Oddities in the for notation abound... The following is valid perl

foreach my $foo qw(bar baz) {   print $foo,$/  }
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:-)

---
demerphq

_{<Elian> And I do take a kind of perverse pleasure in having an OO assembly language...

• Update:

*Sigh* apparently people have missed the point here. The qw is special cased so you dont have to write
foreach my $foo (qw(bar baz)) { }
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Foo on you people who thought I was being sarcastic!

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•Re: Re: Surpised by foreach iterator limitation by merlyn (Sage) on Apr 09, 2003 at 15:47 UTC
Beware. That special syntax DWIMmery was introduced in 5.6. 5.5 and earlier required the outer parens. -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply]
qw// is special! by Mr. Muskrat (Canon) on Apr 09, 2003 at 15:28 UTC
++demerphq! I just read your update and now I can see what you mean. I've been using that syntax for some time and never even noticed the missing parentheses. So I set out to see if there are any other operators that would work in this situation without outer parentheses. So far I haven't found anything besides the `qw//` operator. `foreach` is expecting an operator that returns a natural list, generally the list operator: `(list)`. `qw//` works because it is an operator that returns a list at compile time! Am I missing any other operators that behave the same way?	[reply] [d/l] [select]
Re: Re: Surpised by foreach iterator limitation by Mr. Muskrat (Canon) on Apr 08, 2003 at 21:01 UTC
What is so odd about that? foreach loops over a normal list value. qw returns a normal list. The last line of a block doesn't require a semicolon. It looks quite normal to me. Unless of course you mean... foo bar baz. :-)	[reply]
Re: Re: Surpised by foreach iterator limitation by shotgunefx (Parson) on Apr 08, 2003 at 20:53 UTC
Odd indeed. -Lee "To be civilized is to deny one's nature."	[reply]


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