On Jun 16, 2012, at 8:34 AM, Peter Haworth wrote:
> Wondering why rarray is passed by reference?
In the spirit of passing by reference, the answer is:
Refer to the dictionary under "@" for a user contributed note from
oli...@runrev.com.
In the spirit of passing by value, the answer is:
Passing a parameter by reference means that the data contained in the variable
is not duplicated as is the case with normal parameter passing. This is useful
in some cases for improving efficiency. Any situation where you are repeatedly
passing a large variable to a handler could potentially be speed up by making
it a reference parameter. Its important to keep track of which parameters are
passed by reference to prevent unexpected behavior. I tend to use a prefix of
"r" for reference parameters which a handler mutates ("return parameters", e.g.
command getTimeAndDate @rTime, @rDate).
-- Dick
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