[Gambas-user] Possible CDATE issue Latest version

[Brian G]

----- On Nov 19, 2022, at 11:54 AM, Jussi Lahtinen <jussi.lahtinen at gmail.com> wrote: 

> Tobias, don't you think that this would be easier if the dates would mimic the
> behavior of a paper calendar?
> To me this is so obvious, it's old, proven tech and immune to timezone issues
> (and GNU Lib C supports it). Maybe I'm missing something?
> Of course, it is too late to modify the existing behavior, because of backward
> compatibility, but am I really the only one who thinks that would be a useful
> feature?

> Jussi

> On Sat, Nov 19, 2022 at 8:48 PM Tobias Boege via User < [
> mailto:user at lists.gambas-basic.org | user at lists.gambas-basic.org ] > wrote:

>> On Sat, 19 Nov 2022, Brian G wrote:
>>> ----- On Nov 19, 2022, at 9:43 AM, Benoit Minisini [
>>> mailto:benoit.minisini at gambas-basic.org | benoit.minisini at gambas-basic.org ]
>> > wrote:

>> > > Le 19/11/2022 à 17:26, Brian G a écrit :

>> > >> ----- On Nov 19, 2022, at 2:43 AM, Benoit Minisini
>>> >> [ mailto:benoit.minisini at gambas-basic.org | benoit.minisini at gambas-basic.org ]
>> > >> wrote:

>> > >>> Le 18/11/2022 à 20:36, Brian G a écrit :
>> > >>>> With the latest version of gambas, I am getting the strangest issue, I
>> > >>>> dont understand, not sure if its a bug
>> > >>>> cdate returns different values if called with a class public variable.
>> > >>>> Locks like possibly like in the last case
>> > >>>> its return the gmt time.

>> > >>>> Hello world 11/18/2022 11:30:56
>> > >>>> CDATE(now) 11/18/2022 11:30:56
>> > >>>> Eval("cdate(now)") 11/18/2022 11:30:56
>> > >>>> dim thedate as string = "CDate(now)"
>> > >>>> Try ddate = Eval(thedate) 11/18/2022 19:30:56.895


>> > >>> The printed strings are normal. What did you expect?

>> > >>> --
>> > >>> Benoît Minisini.


>>> >>> ----[ [ http://gambaswiki.org/wiki/doc/netiquette |
>> > >>> http://gambaswiki.org/wiki/doc/netiquette ] ]----

>> > >> I expect the times to all be the same, the last time printed is a different time
>> > >> zone
>> > >> although the same expression is being evaluated.


>> > > It can't be the same as in your script, 'ddate' is a string that
>> > > receives the result of evaluating an expression that returns a date.

>> > > Hence this date is converted to a string automatically with CDate() to
>> > > be put inside the 'ddate' variable, and so you get the UTC
>> > > representation of the date as returned by CDate().

>> > > Regards,

>> > > --
>> > > Benoît Minisini.


>>> > ----[ [ http://gambaswiki.org/wiki/doc/netiquette |
>> > > http://gambaswiki.org/wiki/doc/netiquette ] ]----
>> > Maybe I am just a bit thick but I had expected

>> > print cdate(now)

>> > and

>> > dim a as string = cdate(now)
>> > print a

>> > To produce the same output value!

>> > This is what is produced

>> > 11/19/2022 10:19:18
>> > 11/19/2022 18:19:18.16


>> No! The Print instruction converts dates to strings for humans, i.e.,
>> using the current locale, including timezone. By contrast, assigning
>> to a string variable uses the low-level conversion function CStr()
>> which does not use the current locale.

>> You should expect

>> Dim a As String = CDate(Now)
>> Print a

>> and

>> Print CStr(Now)

>> to produce the same output, as well as

>> Dim a As String = Str$(Now)
>> Print a

>> and

>> Print Now

>> And indeed, they do. The Print documentation tells you that.

>> Best,
>> Tobias

>> --
>> "There's an old saying: Don't change anything... ever!" -- Mr. Monk

>> ----[ [ http://gambaswiki.org/wiki/doc/netiquette |
>> http://gambaswiki.org/wiki/doc/netiquette ] ]----

> ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
I am sorry but that is crazy. 
both should use the same conversion as, this is incredibly confusing for the user. 

if i want something other that what print would diplay I can specify the correct conversion - cstr(now) 

print now 
and 
dim a as string = now 
print a 

should by common logic be equivelent, or have more confused users that anything else 

It would simplify so much if what is expected is shown. 
The default conversion should be he same for all uses of the date functions and values , and anything else shoul;d be specified. 

And what about the date(now) it is not working correctly at all it always a returns a time portion when it should only return the date according to the documentation. and the time is always 00:00:00 or 08:00:00 which is the diffrence to GMT for my location. 

This seems so messed up. 

"Failure is the key to success; 
each mistake teaches us something" .. Morihei Ueshiba 
Brian G 
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