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ISO DATE to reglar date?

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    #1

    ISO DATE to reglar date?

    is there way to translate an ISO DATE
    to conventional date?

    i believe string like 2009-W01-1

    to be converted back to normal date?
    like 01/01/2009 etc
    Tags: None
    #2
    Re: ISO DATE to reglar date?

    Hi Ken,

    This can be done with string manipulation.

    Once you have defined each aspect then you can create your own function.

    To start with, v_year=left("2009-W01-1",4)-> v_year="2009". etc.
    Regards
    Keith Hubert
    Alpha Guild Member
    London.
    KHDB Management Systems
    Skype = keith.hubert


    For your day-to-day Needs, you Need an Alpha Database!

    Comment

      #3
      Re: ISO DATE to reglar date?

      i was hoping there are codes already written,
      yes, we need first day of the years and add 7 days etc

      Comment

        #4
        Re: ISO DATE to reglar date?

        Actually Ken, according to one source,
        2009-W01-1
        would be 2008-12-29
        Another example given is that 2009-W53-7 would be 2010-01-03.

        I will check but I don't remember an Alpha function or UDF that is available.

        So if created maybe share the result.

        There are some ISO functions that may be of help in the Help file....

        http://support.alphasoftware.com/alp..._Functions.htm

        Keith's left() will work as the ISO date always will have the same format and number of characters in the string, but for future reference another function to always consider is word() if there is a consistent delimiter which in this case the dash is.
        Last edited by MikeC; 02-22-2009, 04:46 PM.
        Mike
        __________________________________________
        It is only when we forget all our learning that we begin to know.
        It's not what you look at that matters, it's what you see.
        Henry David Thoreau
        __________________________________________



        Comment

          #5
          Re: ISO DATE to reglar date?

          Hi Ken,

          There are a number of functions to convert dates into ISO values but none to convert an ISO date back to conventional date in Alpha.

          Check out the help file for ISO. Looking at the samples there, W53 could be done but might not be accurate.
          Regards
          Keith Hubert
          Alpha Guild Member
          London.
          KHDB Management Systems
          Skype = keith.hubert


          For your day-to-day Needs, you Need an Alpha Database!

          Comment

            #6
            Re: ISO DATE to reglar date?

            Code:
            ?iso_to_date("2009-W01-1")
= {01/05/2009}

            Comment

              #7
              Re: ISO DATE to reglar date?

              G,
              Unless there is another ISO date definition, then my example stands and your apparent UDF gives incorrect results. It looks as if your function is taking the first Monday of January instead of the first Monday of the week...should be fairly simple for you to adjust it. An interesting problem and most likely a bit of work to put the function together.

              For the ISO week date of 2009-W01-1 (which stands for the first day of the first week of the year 2009), the result should be 2008-12-29 (or 12-29-2008) which is Monday, the 29th of December, 2008.
              Mike
              __________________________________________
              It is only when we forget all our learning that we begin to know.
              It's not what you look at that matters, it's what you see.
              Henry David Thoreau
              __________________________________________



              Comment

                #8
                Re: ISO DATE to reglar date?

                Code:
                ?Iso_To_US("2009-W01-1")
= {12/29/2008}

                Comment

                  #9
                  Re: ISO DATE to reglar date?

                  Good deal--hopefully you let at least Ken know how you did this so that others don't have to reproduce your efforts!! :)
                  Mike
                  __________________________________________
                  It is only when we forget all our learning that we begin to know.
                  It's not what you look at that matters, it's what you see.
                  Henry David Thoreau
                  __________________________________________



                  Comment

                    #10
                    Re: ISO DATE to reglar date?

                    Iso_Week_to_date() posted in the code archive
                    Tim Kiebert
                    Eagle Creek Citrus
                    A complex system that does not work is invariably found to have evolved from a simpler system that worked just fine.

                    Comment

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