Quickly: Using a sub as a method
Quickly now, let’s consider the difference between a sub and a method. When
programming Perl 6, the only significant difference between a sub and a
method is that a method always takes at least one positional argument
whereas a sub only takes what’s listed in the parameter list. In a method, the
required first positional parameter is not passed as part of the parameter list,
but assigned to self.
For example,
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