passing hash to a function

[jtownsen]

Typically I pass a string a variables to my functions. However, as the list 
gets longer the script is harder to maintain. Rather than a list, I thought 
I might pass the function a hash (aka dictionary). I recall doing this when 
I took a Perl class, but don't recall the details.

Is it possible to pass the dictionary directly, e.g.
some_function (%some_hash);
Or do I need to pass the function a reference to the hash. Please jog my 
memory.

Thanks
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