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Bluesmaster

weekDayDiff

9 posts in this topic

#1 ·  Posted (edited)

just a small one-liner contribution that came along today. Calculates the weekday based on another weekday and the diffrence in  days ($diff)  between them:

(I know you can do it by combining udfs but hey.. :geek: )

Mod( Mod( @WDAY + 7 + Mod( $diff , 7 ) , 7 ) + 6 , 7 ) + 1

best regards 

Bluesmaster

Edited by Bluesmaster

My UDF: [topic='156155']_shellExecuteHidden[/topic]

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ah sorry didnt knew this post. Very interesting.


My UDF: [topic='156155']_shellExecuteHidden[/topic]

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$diff is the ( + / -) difference in days that you want to calculate. I thought the snippet was to short to unnecessarily encapsulate it in a (better understandable)  func() 


My UDF: [topic='156155']_shellExecuteHidden[/topic]

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ah sorry my fault, the $diff must be numeric:

; Which weekday is tommorow ( +1 ) ?
$sourceDay = @WDAY
$diff =  1
ConsoleWrite(Mod( Mod( $sourceDay + 7 + Mod( $diff , 7 ) , 7 ) + 6 , 7 ) + 1 & @LF)



; Which weekday was yesterday ( -1 ) ?
$sourceDay = @WDAY
$diff =  -1
ConsoleWrite(Mod( Mod( $sourceDay + 7 + Mod( $diff , 7 ) , 7 ) + 6 , 7 ) + 1 & @LF)



; Which weekday is in a lot of days that you can never calculate in your head?
$sourceDay = @WDAY
$diff =  533
ConsoleWrite(Mod( Mod( $sourceDay + 7 + Mod( $diff , 7 ) , 7 ) + 6 , 7 ) + 1 & @LF)

My UDF: [topic='156155']_shellExecuteHidden[/topic]

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#8 ·  Posted (edited)

Your expression is uselessly complex:

Mod($sourceDay + Mod($diff, 7) + 6, 7) + 1

is enough, provided $sourceday is in the correct range.

Edited by jchd

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I had the feeling it was to complex but I couldnt figure it out :)  

Thank you jchd


My UDF: [topic='156155']_shellExecuteHidden[/topic]

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