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Invert Date List

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  • Invert Date List

    I have this code that will display dates with the oldest first.Ex. 1/1/2002
    2/5/2002
    4/5/2002

    I would like to invert the listing.
    4/5/2002
    2/5/2002
    1/1/2002

    Thanks for your help...

    dim global vdate as c
    dim namearray(52) as C
    dim i as n

    i=1
    tbl=table.open("time_hx",file_ro_shared) 'open the payroll file
    tbl.index_primary_put("trandate") 'look at this index, its unique
    tbl.fetch_first()
    while .not.tbl.fetch_EOF()
    namearray(i)=dtoc(tbl.trandate) 'change the date to character
    i=i+1
    tbl.fetch_next()
    end while
    tbl.close()
    vdate=ui_get_list_array("Which Pay Date?",1,"namearray")
    vdate=alltrim(vdate)
    if vdate=""
    end
    end if

  • #2
    RE: Invert Date List

    Don:

    Add the line

    sort_array("namearray", 1)

    after the array is loaded and before you prompt for vdate.

    Craig

    Comment


    • #3
      RE: Invert Date List

      Craig,

      His array is of type C, and DTOC() formats the string equivalents for each date as "MM/DD/YYYY".

      So, you get this kind of sort:

      Code:
      dim myArray[5] as C
      myArray(1) = "01/01/2002"
      myArray(2) = "11/01/2001"
      myArray(3) = "01/01/2003"
      myArray(4) = "10/01/2000"
      myArray(5) = "01/01/2004"
      
      sort_array("myArray",1)
      for i = 1 to 5; ?myArray(i); next i
      
      11/01/2001
      10/01/2000
      01/01/2004
      01/01/2002
      01/01/2000
      The descending sort sorts each value from left
      to right, but this probably isn't what he wants.

      I think he'll need to change the array
      declaration so that it's of type D,
      or he'll need to convert the dates using
      DTOS(), which will create string equivalents
      formatted as "YYYYMMDD". If he uses
      DTOS() then a simple array sort descending
      will work fine.

      -- tom

      Comment


      • #4
        RE: Invert Date List

        Tom:

        Yes, you are correct. Sort_array() will not work in this case.

        I think I would consider resetting the index "trandate" to "descending" order before I went through the transitional changes you suggest... If the index "trandate" is sorted on date only, it will load the array properly to begin with.

        I'm also a big one on accurately dimensioning arrays by basing them on a record count, rather than a static dimension, and using for...next to load the array. This prevents the dreaded "array out of range" message from ever appearing. Of course, it's possible '52' is enough, but...

        Craig

        Comment


        • #5
          RE: Invert Date List

          Craig, I agree. In fact, that's my approach as well. Good ideas.

          -- tom

          Comment


          • #6
            RE: Invert Date List

            Thank you both for your speedy reply, but I need a little more help. Iím new to this so I have no clue how to make these corrections. Would appreciate how to modify me script.
            Thanks
            Don

            Comment


            • #7
              RE: Invert Date List

              It seemed more involved, but following your directions all I did was to change the index "trandate" to "descending" and it looks fineÖ Thanks Don

              Comment

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