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  1. or download this
    mySub(
    opt1 => $value1
    opt2 => $value2
    opt3 => $value3
)
  2. or download this
    #!/usr/bin/perl
use strict;
...
    my $param = @_; 
    print $param->{uno}, "\n";
}
  3. or download this
    ~/programming/perl/oo$ ./test.pl 
Can't use string ("6") as a HASH ref while "strict refs" in use at ./t
+est.pl line 7.