[Pdx-pm] accessing list elements

Joshua Keroes jkeroes at eli.net
Wed Sep 3 18:07:46 CDT 2003

On (Wed, Sep 03 15:45), Michael Rasmussen wrote:
> When reading through some code I came across this:
> my $pic = $files[rand @files];
> huh?  rand returns a "random fractional number". And lists are
> accessed through integers.  
> Or not?
> A simple test case shows that you can access list members with
> fractional numbers.  This is handy, but puzzling behavior.
> I couldn't find a reference to this in the docs.
> Is there any explanation to this besides "Perl does what you expect"?

perl -le '@a=qw/a b c d/; print @a[0.923423,1.23432,2.345,3.87543]'
perl -le '@a=qw/a b c d/; for (0..9) { $n = rand(3); print "$n: $a[$n]" }'

Apparently, the array lookup implicitly converts the float to an int. Handy!


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