Re: New VSI post on Youtube

On Tue, 27 Aug 2024 20:02:46 -0400, Arne Vajhøj wrote:

On 8/27/2024 5:47 PM, Lawrence D'Oliveiro wrote:

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On Tue, 27 Aug 2024 13:40 +0100 (BST), John Dallman wrote:

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In article <vadndu$1igfq$1@dont-email.me>, ldo@nz.invalid (Lawrence
D'Oliveiro) wrote:

 
You never had functions and classes as first-class objects in BASIC or
COBOL; you do in Python. You never had metaclasses in those languages;
you do in Python. You never had custom operator overloads in those
languages; you do in Python.

 
I suspect that he was more thinking philosophy than specific syntax and
functionality.

So was I. The one is definitely a reflection of the other.

Also note that those languages has also evolved.

And they had more time to do so. But they are still behind Python.

VB.NET has classes, lambdas and operator overload. Python metaclass does
not have a direct equivalent in VB.NET but AppDomain, compiler services
and extension methods should together provide similar functionality.

You know how in Python, you can instantiate OSError to report an OS
error code, and it automatically turns into the appropriate subclass
(e.g. FileNotFoundError) depending on the error code? These happen to
be built-in classes, but with metaclasses, you can do the same thing
with your own class hierarchy.

<https://gitlab.com/ldo/python_topics_notebooks/-/blob/master/Uses%20For%20Metaclasses.ipynb>