[PerlChina] About required parameters in sub

Sun, 01 Aug 2010 09:03:16 -0700 

I saw someone uses the following syntax to define a subroutine:

sub SubName($$;$;$)

which means there are 2 required parameters? and the rest 2 are optional? I did 
a search but didn't find it. Anyone could give me a link?

Thanks in advance!

Andy

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