Re: how many elements in array?

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Re^2: how many elements in array? by Limbic~Region (Chancellor) on Apr 18, 2005 at 12:43 UTC
tcf03, $#one and scalar @one do not produce the same thing. Using scalar @one gives the number of elements, which is what was asked for, while $#one gives is the index of the last element. Cheers - L~R	[reply]
Re^3: how many elements in array? by RazorbladeBidet (Friar) on Apr 18, 2005 at 12:59 UTC
Although, technically, they actually could produce the same thing, if one were to modify `$[` to be 1 Update: Just a caveat that this is not recommended in the slightest :) as the docs for index say: The return value is based at 0 (or whatever you've set the $[ variable to--but don't do that). -------------- "But what of all those sweet words you spoke in private?" "Oh that's just what we call pillow talk, baby, that's all."	[reply] [d/l]
Re^4: how many elements in array? by Limbic~Region (Chancellor) on Apr 18, 2005 at 13:19 UTC
RazorbladeBidet, While perldoc perlvar highly discourages the modification of `$[`, I recognize that in some very odd situation it may be the most natural way to solve a problem. In this case, it would be doing something very un-natural for the sake of being correct. A little bit of knowledge is a dangerous thing. If you are going to give someone a loaded gun, please give them the instruction manual too. Cheers - L~R	[reply] [d/l]
Re^3: how many elements in array? by bradcathey (Prior) on Apr 18, 2005 at 13:02 UTC
Helpful in a `loop` as in: `for ( 0 .. $#one ) { ...do stuff to each element... }` [download] —Brad "The important work of moving the world forward does not wait to be done by perfect men." George Eliot	[reply] [d/l] [select]
Re^4: how many elements in array? by Limbic~Region (Chancellor) on Apr 18, 2005 at 13:11 UTC
bradcathey, There are lots of ways in which $#array can be useful otherwise it wouldn't exist in the language. My point was more about correctness. For instance, if I am doing the following: `my @ucase = grep { $_ eq uc() } @words; my $cnt = @ucase;` [download] I have the count of uppercase words, making all appropriate assumptions about @words. I would need to use $#ucase + 1^* since it doesn't produce a count of elements otherwise. This was not clear from the post that I was replying to. Cheers - L~R * As RazorbladeBidet points out, modifying `$[`, is one highly discouraged way of accomplishing the same thing.	[reply] [d/l] [select]


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