On 12/14/20 2:33 PM, ToddAndMargo via perl6-users wrote:
Hi All,
https://docs.raku.org/language/classtut
"A tutorial about creating and using classes
in Raku"
So far so good.
"Raku has a rich built-in syntax for defining
and using classes."
Uhhhh. Forgot something did we? What is a "class"?
Next up:
"A default constructor allows the setting of
attributes for the created object:"
Uhhhh. Forgot something else, did we? What is
an "object"?
The "tutorial" leaves "class" and "object" up to
the reader to guess at from what looks like an
interesting example.
But, again forgetting things, The tutorial also
leaves the syntax up for guess work as well. Not
described are "$.", "$!", ":$", ^$" what are they
and what are the rules for using them.
Next up:
my $r = Rectangle.new(
lower => Point.new(x => 0, y => 0),
upper => Point.new(x => 10, y => 10));
Why are we using ".new"?
Why are we using the syntax for a hash (=>)?
And:
$!upper.x
What is the rules and purpose for such? Why
the "!" and why the "."?
I do realize the documentation is not meant for
beginners, but rather a refresher for advanced
users that do not need it, but this link definitely
said "tutorial" -- fifth word in.
Would some kind soul please fill in the missing
parts of the "tutorial" for me?
Many thanks,
-T
Well, so far I have:
"class" is a definition of a custom structure of
of variables.
"object" is when you declare a structure using
a "class".
And I am still working on a "method" definition,
and where they fit into the classes declaration,
although I use methods extensively
say (-5..5).rand.truncate.abs**3
64
This is Perl 5's definition of method:
class method
A method whose invocant is a package name, not
an object reference. A method associated with
the class as a whole.
Not sure how to translate that to Raku
