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Lookupl(L as Lost, Logic

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  • Lookupl(L as Lost, Logic

    Sometimes a Picture can speak a Thousand words! As the title suggests trying to decipher the Help file Example of this function leaves me "mind boggled "
    “There is nothing like a dream to create the future.”
    But then again:
    Basic research is what I am doing when I don't know what I am doing and to steal ideas from one person is plagiarism; to steal from many is research!

  • #2
    Re: Lookupl(L as Lost, Logic

    It is not my mind that is boggled, it's my eyes! I can't read anything in that picture. Can you reference the URL?

    Comment


    • #3
      Re: Lookupl(L as Lost, Logic

      try this http://bellsinisrael.com/lookupl.jpg
      “There is nothing like a dream to create the future.”
      But then again:
      Basic research is what I am doing when I don't know what I am doing and to steal ideas from one person is plagiarism; to steal from many is research!

      Comment


      • #4
        Re: Lookupl(L as Lost, Logic

        Chris, sample tables would help us help you.

        Here's an example using AlphaSports:
        Code:
        'lookup the ship_same field value for customer_id = "00000037"
        
        ?lookupL("F","00000037","Ship_same","customer","Customer_I")
        = .T.
        The function takes 5 arguments:

        "F" tells the function to lookup the first matching record
        "00000037" is the search key, it must correspond to the indextag identified later
        "Ship_Same" is the field name from which a logical field value is to be returned
        "Customer" is the lookup table name
        "Customer_I" is the indextag name to be used to do the search

        Basically, the function loads a table, sets an index primary, and then does a indexed find by key using a search key that you specify. It then returns a logical field value from the found record, and then closes the table. You could do the same thing in a multi-step script, but this is easier.

        In this case, with the function

        LookupL()

        It wants to return a logical field value.

        Comment


        • #5
          Re: Lookupl(L as Lost, Logic

          Here is the example from the help file.
          Which part are you having a problem with?

          Comment


          • #6
            Re: Lookupl(L as Lost, Logic

            Hi Chris,
            I can read it fine so we must have similar screen resolutions....but I solve most problems "hands on" with samples as am terrible with guessing!!

            Here's a guess--

            Code:
             
            lookupl("F",reservation+"=17654",Active,"What_Drive:\Whatever_Folders\Clarify.dbf","A")
            Or maybe just "17654" instead of reservation+"=17654"



            EDIT:
            I see I am really slow this am!
            Last edited by MikeC; 05-03-2008, 10:04 AM. Reason: LATE!!!
            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


            • #7
              Re: Lookupl(L as Lost, Logic

              Still lost in L , have gone in a different direction to obtain required result. Will try from time to time to figure it out! The examples in the help file are a bit of a tongue twister in that both tables have same field names and index is almost the same context.
              “There is nothing like a dream to create the future.”
              But then again:
              Basic research is what I am doing when I don't know what I am doing and to steal ideas from one person is plagiarism; to steal from many is research!

              Comment


              • #8
                Re: Lookupl(L as Lost, Logic

                Are you trying to do one lookup in 2 tables at one time?
                Dave Mason
                [email protected]
                Skype is dave.mason46

                Comment


                • #9
                  Re: Lookupl(L as Lost, Logic

                  From a form based on the customers table I want to lookup the logical value of a ordernum in the clarify table
                  “There is nothing like a dream to create the future.”
                  But then again:
                  Basic research is what I am doing when I don't know what I am doing and to steal ideas from one person is plagiarism; to steal from many is research!

                  Comment


                  • #10
                    Re: Lookupl(L as Lost, Logic

                    done in the interactive window in v9.

                    Code:
                    dim xxx as L  'dimmed the var
                    First, acctnumber(numeric in my case), field, table, index
                    xxx = lookupl("F",2584,"Business","names","Acct")
                    
                    ?xxx
                    .T.
                    You can do this in field rules, calc field, xbasic, etc. In other words, it doesn't matter where you do it from as long as you supply the correct info.
                    Last edited by DaveM; 05-05-2008, 05:47 PM.
                    Dave Mason
                    [email protected]
                    Skype is dave.mason46

                    Comment


                    • #11
                      Re: Lookupl(L as Lost, Logic

                      Chris, you need to explain what you want to do. I'm not sure but my guess is that there is a problem in your basic table structure and you are trying to do something the wrong way. Your example leaves me with these questions:

                      1. The Customer table has a Reservation number. Does each "customer" have only one reservation number? (In other words, if the same customer comes in tomorrow, do we know that or is it a completely new record with no reference to the "original" customer from yesterday.)
                      2. Is the reservation number a numeric field or a character field?
                      3. How many orders can there be for any one reservation number?
                      4. IF there can be multiple order numbers for any one reservation, how will you identify the one you want.

                      And, the really big question: Do you actually want to look up the value or do you really want to look up the customer and just display the status of the order(s)? In this case....
                      (a) You don't need a lookup at all. Just create a set with the Clarify table linked to the Customer table and display the results on the form. (link by Reservation field in Customer to Order_num in Clarify table)
                      (b) If there is only one order (Clarify record) for each Customer, why do you even have a separate Clarify table?

                      Comment

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