Vectors

[The Beez]

Hi 4tH-ers!

I'm polishing up my C++ knowledge and bumped into Vectors. Now, we already got dynamic arrays, so I decided to add an OOP wrapper around it - which technically means we got some kind of OOP arrays.

We already got dynamic strings, so..

When creating a vector you can initialize it with values (the Forth way). If you don't want to initialize the vector you have to supply "0" (meaning: no values). You can grow or shrink a vector, get and set values, push and pop values and get the current size.

No, it's not the full range of methods a C++ vector offers, but I think it covers most of the basics. You can always subclass it.

Gee, I'm really beginning to talk like a real OOP junkie..

Hans Bezemer

[Phillip Kelly]

Thanks Hans

Made note of this one!

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Yours Sincerely
Mr. Phillip Kelly
 

[The Beez]

Well, while I was at it I remembered some horrible program I wrote about an array of objects - called FOOSARRY.4PP

So I pulled it and plugged vectors into it - see if that could clean things up a bit.

I was not disappointed. I subclassed Vector, rewrote the constructor and destructor and added another method for good measure.

In short, the main program now looks like this:

10 0 instance Dogs Lassies             \ create a "dogs" vector of ten dogs
                 
Lassies -> barking                     \ now let all the dogs bark
Lassies delete                         \ delete the vector

https://sourceforge.net/p/forth-4th/code/HEAD/tree/trunk/4th.src/4pp/foosarry.4pp

Not too shabby! ;-)

Hans Bezemer

[Phillip Kelly]

That's very nice.

It is actually very similar to the Python pickle format used for serialization and deserialization of datasets for machine learning that I am reading about atm.

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[Phillip Kelly]

I should add, that it is the pickle dictionaries I am referring to in my last email...the formatting is similar

On Tue, Mar 21, 2023 at 3:26 AM The Beez <the.bee...@gmail.com> wrote:

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[The Beez]

.. and while was at it, I decided to use the DSTR.4PP lib in all FOOS programs. It was not too hard to implement. Got it right almost first time.

Hans Bezemer