•Re^2: Testing <> for undefined


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•Re^2: Testing <> for undefined

by merlyn (Sage)

on Jul 07, 2004 at 16:52 UTC ( [id://372461]=note: print w/replies, xml )

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in thread Testing <> for undefined

This code scares me. If you want to see if there is one argument, use @ARGV in a scalar context, comparing it to one. I could easily imagine people reading this code and not remembering that $#ARGV is one less than the number of arguments, and being very confused.

My rule is, use @ARGV when you want to talk about the number of elements, and reserve $#ARGV for getting the ending index for ranges.

-- Randal L. Schwartz, Perl hacker
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Re^3: Testing <> for undefined
by TrekNoid (Pilgrim) on Jul 07, 2004 at 17:21 UTC

My rule is, use @ARGV when you want to talk about the number of elements, and reserve $#ARGV for getting the ending index for ranges.

Thanks, merlyn... It's one of those things I learned to do one way when I was first learning Perl, and have never gone back and revisted it...

There's just so few things I can help people with in Perl, that I get excited when I see one I *can* answer :) Guess I'm destined to remain an acolyte for the foreseeable future :)

I'll make a note for future development

Trek

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