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FAQ 5.39 Why do I get weird spaces when I print an array of lines?
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FAQ 5.39 Why do I get weird spaces when I print an array of lines? PerlFAQ Server 03-16-2008
Posted by Abigail on March 17, 2008, 4:58 am
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 _
Ben Bullock (benkasminbullock@gmail.com) wrote on VCCCXI September
?? On Sun, 16 Mar 2008 06:03:03 -0700, PerlFAQ Server wrote:
??
?? > 5.39: Why do I get weird spaces when I print an array of lines?
?? >
?? > Saying
?? >
?? > print "@lines\n";
?? >
?? > joins together the elements of @lines with a space between them.
??
?? I recently learnt from a post here by Ben Morrow that it joins together
?? the elements of @lines with a $" between them:
??
?? ben ~ 502 $ perl -e '$"="bu";@ba=("bo","be");print "@ba\n";'
?? bobube
??
?? Shouldn't this FAQ entry mention $"?


No, it's a FAQ, not a reference guide.

People who set $" generally aren't surprised at having "weird spaces".


Abigail
--
srand 123456;$-=rand$_--=>@[[$-,$_]=@[[$_,$-]for(reverse+1..(@[=split
//=>"IGrACVGQ\x02GJCWVhP\x02PL\x02jNMP"));print+(map@[),"\n"

Posted by brian d foy on March 18, 2008, 5:15 pm
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> On Sun, 16 Mar 2008 06:03:03 -0700, PerlFAQ Server wrote:
>
> > 5.39: Why do I get weird spaces when I print an array of lines?
> >
> > Saying
> >
> > print "@lines\n";
> >
> > joins together the elements of @lines with a space between them.
>
> I recently learnt from a post here by Ben Morrow that it joins together
> the elements of @lines with a $" between them:
>
> ben ~ 502 $ perl -e '$"="bu";@ba=("bo","be");print "@ba\n";'
> bobube
>
> Shouldn't this FAQ entry mention $"?

The FAQ shouldn't mention $". The answer is not about how to change
what happens, but to recognize in the default case that interpolating
an array has behavior.

But, the answer could be better.

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