[Gambas-user] Date(Now) with time component under Ubuntu?
rwe-sse at osnanet.de
Tue Dec 4 13:16:13 CET 2018
Am 04.12.18 um 12:56 schrieb Benoît Minisini:
> Le 04/12/2018 à 11:23, Rolf-Werner Eilert a écrit :
>> To give you an idea of the problem, here is a code snippet from this
>> second application, it is in Form_Open:
>> t$ = Date(Now)
>> heute = String.Mid(t$, 4, 2) & "-" & String.Left(t$, 2) & "-" &
>> String.Mid(t$, 7, 4)
>> DerTag.Tag = Date(Now)
>> DerTag.Text = "heute, " & Wochentag(Date(Now)) & ", " &
>> Replace(heute, "-", ".")
>> Today (4th December)
>> - t$ becomes "12.03.2018 23:00:00"
>> - 'heute' of course becomes "12-03-2018"
>> Now it's curious:
>> - DerTag.Tag becomes "04.12.2018 00:00:00" i. e. day and hour +1 !!
>> And of course, it goes wrong here:
>> - DerTag.Text becomes "heute, Dienstag, 03.12.2018"
>> How to solve this mess???
> Read carefully the documentation about Date(), avoid implicit conversion
> from Date to String, Read carefully the documentation about Print,
> CStr() and Str(), and just don't mix local and universal date
> For example, let's analyze the following expression:
> t$ = Date(Now) ' Assuming that t$ is a String variable
> Now -> Return a Date value corrresponding to the current date & time.
> Date(Now) -> Return the date part, in the current localization (i.e. the
> current timezone). It means that the time part is set to 00:00:00, but
> in the current timezone.
> t$ = Date(Now) -> Assign the previous date value to a string variable,
> hence applying first the automatic conversion from Date to String. So it
> actually means...
> t$ = CStr(Date(Now))
> CStr() converts the date into a UTC date representation, not in your
> local representation. So you won't see a pure date: the time is shifted
> according to your timezone.
> For the other expressions, I can't tell you, you don't give any
> information about the functions and variable you use.
> And I guess it worked before because you used a Gambas version where you
> had a bug in date / string conversion. I can't say more without you
> giving more details.
This explains it perfectly: I used an older Gambas version and
programmed based on a buggy date-string conversion. Guess this is
exactly what happened.
And now I understood how these conversions are really meant to function.
Thank you for that explanation!
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