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floyd084

_DateDiff help

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floyd084

Im trying to compare two strings which contain date information in the format "yyyy-mm-dd hh:mm:ss tt"

this is the code

$pcdate = _Now()
ConsoleWrite($tdate & " " & $pcdate & @CRLF)
  $DateCalc = _DateDiff('s', $tdate, $pcdate)
ConsoleWrite($DateCalc & " " & $tdate & " " & $pcdate & @CRLF)

I want to use a 12h format but _dateDiff seems to ignore that and assumes 24h, depending on the time i will somethimes get negative values and other times positive.

how do i force it to look at the am - pm part?

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kylomas

Where is $tdate comming from and what is it's value?

kylomas


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guinness

Search the Forum about converting a time from 24h to 12h. The date functions use 24h because not everywhere in the word use AM/PM.


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Updated: 22/04/2018

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kylomas

Also, look in the help file for the difference between _Now() and _NowCalc()

Edited by kylomas

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floyd084

$tdate is string value extracted from a text file the string is in format "yyyy-mm-dd hh:mm:ss tt"

i setup my registry so that _now also returns a string in format "yyyy-mm-dd hh:mm:ss tt"

here is an exmaple of the consolewrite line :

24816 2013-02-04 01:02:33 AM 2013-02-04 07:56:09 PM

24k seconds is about 6hrs, and 1:02am and 7:56 pm is obviously greater than 6 hrs.

Im going to try the format to 24hr, should work buy would prefer to have 12h if possible.

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BrewManNH

You can do it in 12 hour format, just not with any of the date/time functions in AutoIt, you'd have to create your own.


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floyd084

Thanks guys, I just ended up using the 24h format, works fine now.

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kylomas

floyd084,

Excellent, you may find somehing useful in this

;
#include <date.au3>
;

consolewrite(_HoursAndMinutes('2013-02-04 01:02:33 AM', '2013-02-04 07:56:09 PM') & @lf)
consolewrite(_HoursAndMinutes('2013-02-04 05:02:33 PM', '2013-02-05 07:56:09 AM') & @lf)
consolewrite(_HoursAndMinutes('2013-02-04 05:02:33 PM', '2013-02-04 07:56:09 AM') & @lf) ; <-- should be a negative value
consolewrite(_HoursAndMinutes('2013-02-04 05:02:33 PM', '2013-02-04 07:56:09 PM') & @lf)

func _HoursAndMinutes($StartDate, $EndDate)

    if stringinstr($EndDate,'PM') then
        $hour = stringregexp($EndDate,'( \d\d):',3)
        $hour[0] += 12
        $EndDate = stringregexpreplace($EndDate,' \d\d:', ' ' & $hour[0] & ':')
    endif

    if stringinstr($StartDate,'PM') then
        $hour = stringregexp($StartDate,'( \d\d):',3)
        $hour[0] += 12
        $StartDate = stringregexpreplace($StartDate,' \d\d:', ' ' & $hour[0] & ':')
    endif

    $min = _datediff('n',$StartDate,$EndDate)
    $hour = stringformat('%02s',Floor($min / 60))
    $min  = stringformat('%02s',Mod($min, 60))

    return $hour & ' hours ' & $min & ' minutes'

endfunc

kylomas


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guinness

kylomas,

Is there an option in Tidy to make functions/keywords lowercase or do you do this manually?

Thanks guys, I just ended up using the 24h format, works fine now.

Why? People gave you working examples.

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Updated: 22/04/2018

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jchd

Maybe simply because AM/PM format doesn't allow any standard collation, which is one more reason to avoid it at all cost as a computational format.

The same remark applies as well to YDM, DMY, ... date formats: they are all UI formats and should never make it in any kind of storage.

That's also why we store integral values as 2's complement integers and not strings of digits.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

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SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
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kylomas

@guinness,

Thanks, I did'nt know that. I usually use Tidy when code indentation is fucked up but now I'll run it on everything.

kylomas


Forum Rules         Procedure for posting code

"I like pigs.  Dogs look up to us.  Cats look down on us.  Pigs treat us as equals."

- Sir Winston Churchill

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