Re: How do I find the key of a specific hash element?

jshock wrote:
>
> For example:
> 
> my %weekdays = (
> 	0  => "SUN",
> 	1 => "MON",
> 	2 => "TUE",
> 	3 => "WED",
> 	4 => "THU",
> 	5 => "FRI",
> 	6 => "SAT",
> );

All those double quotes without any interpolation?

  my %weekdays;
  @weekdays{0..6}= qw/SUN MON TUE WED THU FRI SAT/;

> $weekdays{2}; # gives "TUE"
> 
> But what if I know "TUE" and want to find out what the key is? Is
> there a construct like $weekdays{"TUE"} that gives 2"

If you are certain that your values are unique then you can create an inverse hash:

  my %weeknames = reverse %weekdays;

  print $weeknames{TUE};

HTH,

Rob