Hans Meier (John Doe) wrote: >>>From: Graeme McLaren [mailto:[EMAIL PROTECTED] >>> >>> If I have a variable, $var, and it contains an array how would I be >>> able to easily count the number of elements in the array? I've tried >>> creating a new array and pushing the original array on to it but that >>> creates an array of arrays. >>> >>> Basically I have: > > use strict; > use warnings; > >>> my $var = [ >>> 'a', >>> 'b', >>> 'c' >>> ] > > # shorter: > > my $var=[ qw/ a b c / ]; > >>> and I tried: > > my @array; > #or: > my @array=(); > > (sidenote: the second form must be used in contexts where the code is > persistent/preloaded and used several times, to ensure that @array is always > empty when the next execution hits the code again. Of course only *if* it > should start empty and not accumulate between executions)
Are you sure about that? Do you really understand what my() does? >>> push @array, $var; >>> >>> >>> and got: >>> >>> @array=[ >>> [ >>> 'a', >>> 'b', >>> 'c' >>> ] >>> ] > > You probably got this AoA (array of arrays) by using You mean AoAoA (Array of Arrays of Arrays.) John -- use Perl; program fulfillment -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
