[Cuis-dev] [Important] BackCompatibility and code breaking updates Re: Date conversion from string

[Juan Vuletich]

Hi Hilaire, All,

There are two serious bugs here.

One is the one you report: '48.1.1' asDate gives the date 2048/1/1. This 
makes no sense. Year 2000 was 26 years ago!

Another one is trying to autodetect between dd/mm/yyyy and mm/dd/yyyy. 
This is extremely risky. For instance, this is OK: `#('1/2/2004' 
'1/21/2004') collect: [ :s | s asDate ]` (both in January), but this is 
really wrong: `#('1/2/2004' '21/2/2004') collect: [ :s | s asDate ]` 
(answer is one in January and the other in February).

The only way to fix these is by breaking back compatibility.

To make this not too painful for you all Cuis users and developers, 
Besides the fix I pushed another change that adds the new 
BackCompatibilityAlert exception. This exception will be raised each 
time one of the modified methods answers a value that is different from 
what it used to be. It is not raised if the answered value is the same 
as before. You can resume it.

So, after updating Cuis, run all your tests, or use your packages and 
apps to find out if your code is affected. Any broken behavior will 
raise the exception and print a report in the Transcript. Now you can 
update your code. In this case, the recommended way would be to use four 
digits for years.

After some reasonable time, we can remove the old code and the 
generation of the exception, assuming that all relevant code is updated.

Please take a look, experiment with this, and give feedback.

Thanks,

On 2026-02-04 11:17 AM, Hilaire Fernandes via Cuis-dev wrote:
>
> Hi,
>
> I found Cuis makes some assumption when converting string to date.
>
> It is causing concerns in my Timeline model.
>
> Readhttps://github.com/istoa-eu/app/issues/1
>
> -- 
> http://mamot.fr/@drgeo
>
-- 
Juan Vuletich
www.cuis.st
github.com/jvuletich
researchgate.net/profile/Juan-Vuletich
independent.academia.edu/JuanVuletich
patents.justia.com/inventor/juan-manuel-vuletich
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