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Avoiding vivification with array sliceby jbert (Priest) |
on Sep 09, 2008 at 12:37 UTC ( [id://710067]=perlquestion: print w/replies, xml ) | Need Help?? |
jbert has asked for the wisdom of the Perl Monks concerning the following question: Hi Monks,
This surprised me in code recently:
Well, I actually ran into the issue with a foreach loop rather than a grep. I was thinking that the defined test would exclude any bits of the slice I didn't want - with no side effects. But clearly reading the value to test it's defined-ness is enough to vivify. Does anyone have a nice, concise syntax for looping over "the first N elements of an array, without vivification"? The best I can think of is:
which has the wart of requiring the additional variable @b.
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