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using eval

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    using eval

    I have used eval many times and never had a major problem. However I have not used it in relation to a table before. I have a table with fields called, slot1, slot2, slot3 etc up to 12.

    These fields will be updated according to a variable called start which is numeric and can be anything from 1 to 12.

    dim start_time as n
    dim cust_id as c
    dim tbl as p

    I have opened a table and wish to update one of the fields. I can use the following to update the field:

    if start = 1 then
    tbl.slot1 = cust_id
    end if

    However I would need to repeat that code 12 times.

    If I specify the slot with the following:

    tbl.eval("slot"+start_time) = cust_id
    I get an error saying, "variable if of different type.

    Could somebody help please?

    #2
    Re: using eval

    eval("tbl.slot"+alltrim(str(start_time))) = cust_id
    There can be only one.

    Comment


      #3
      Re: using eval

      Can you post a sample db?

      You may find you need to put the whole expression into a variable and then evaluate using the evaluate_template() function.

      For example

      vslot="slot"+start_time

      command="tbl."+vslot+"=cust_ID"
      evaluate_template(command)

      Not sure if my syntax is correct as my xbasic isn't good enough without trial and error with sample db.

      Comment


        #4
        Re: using eval

        Many thanks Stan,

        Your solution solved the problem perfectly.

        David

        Comment

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