On Wed, Jun 22, 2011 at 6:44 PM, josanabr <john.sanab...@gmail.com> wrote:
> Hi, > > I'm reading a program written in perl and I read this statement > > > -- > To unsubscribe, e-mail: beginners-unsubscr...@perl.org > For additional commands, e-mail: beginners-h...@perl.org > http://learn.perl.org/ > > > Without any more information I would have to say good, and what do you want form the list? (it really does help if you formulate a question and ask what it is that you want to know ;-) I suspect hat you are wondering what this means right? Lets dissect this a little: Lets take the inner most thing ($var2) this is obviously a scalar (or a reference to another variable (I'll explain why I am betting it is a scalar in a bit)) Then we see the following: $var1{...} this is the way one accesses a variable in a hash based on the key (the thing that goes between those brackets). Usually the keys used in a has are scalars of course there is nothing stopping anyone from using complex data structures as a key but it is performance wise not the smartest thing to do. The last bit then @{...} basically says treat what is in side the brackets as an array (which is what one would do if one is expecting an array reference to be returned from $var1's value associated with key $var2. So what would the data structure look like? { "Hash key 1" => \[ 'Array value 1', 'Array value 2', ... ], "Hash key 2" => \[ 'Array value 1', 'Array value 2', ... ], ... } Or in text form: $var1 is an hash containing keys associated with values which are references to arrays. I hope that explains things a little bit. :-) Regards, Rob
