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Evaluate_template Array not working

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    #1

    Evaluate_template Array not working

    My syntax is clearly wrong here:
    Code:
    TOM = table.openmap(vTable,vField1 + "," + vDataField1 + "," + vDataField2 + "," + vDataField3)
Dim Array[vSize] as P
Array.initialize_from_table(TOM,vFilter,vField1)
FOR i = 1 TO vSize        
    FOR m = 1 TO vNoItems        
        vDataHeight = evaluate_template("(vData * Array[" + i + "].vDataField" + m + ")/yMax")

    From the interactive editor, I get this:
    Code:
    evaluate_template("(vData * Array[" + i + "].vDataField" + m)
= Script:TEMPLATE line:1
    All the variables are properly defined and have values. What's wrong?
    Peter
    AlphaBase Solutions, LLC

     [email protected]
    https://www.alphabasesolutions.com
    Tags: None
    #2
    Re: Evaluate_template Array not working

    Do you want

    Code:
    evaluate_template("vDataHeight = (vData * Array[" + i + "].vDataField" + m + ")/yMax")
    or

    Code:
    vDataHeight = eval("(vData * Array[" + i + "].vDataField" + m + ")/yMax")
    There can be only one.

    Comment

      #3
      Re: Evaluate_template Array not working

      Sorry, my typo

      The 2nd code should have been:
      Code:
      ?evaluate_template("Array[" + i + "]" + "vDataField" + m)
= Script:TEMPLATE line:1
      I was trying to show that the array variable was not processing within evaluate template. Although this does:
      Code:
      Array[3].costs
= 563571
      So, ultimately I want this to work:
      Code:
      vDataHeight = evaluate_template("(vData * Array[" + i + "].vDataField" + m + ")/yMax")
      Peter
      AlphaBase Solutions, LLC

       [email protected]
      https://www.alphabasesolutions.com

      Comment

        #4
        Re: Evaluate_template Array not working

        Peter,

        I was trying to illustrate that if you are doing the assignment "outside" of the evaluation, I think you want eval() instead of evaluate_template().

        Code:
        i = 5
ABC5 = 27

? eval("ABC"+i)
= 27
        On the other hand if you want to do the assignment within the evaluation...

        Code:
        evaluate_template("ABC"+i+"=99")
? ABC5
= 99
        Might be easier to explain with simple substitution as

        Code:
        i = 1
m = 1
? ("(vData * Array[" + i + "].vDataField" + m + ")/yMax")
= "(vData * Array[1].vDataField1)/yMax"
        I don't think

        "(vData * Array[1].vDataField1)/yMax"

        is a suitable xbasic code line to feed to evaluate_template().
        EVALUATE_TEMPLATE() executes the Xbasic code specified by Expression.
        There can be only one.

        Comment

          #5
          Re: Evaluate_template Array not working

          Oops. Good point, Stan. Let me try that again. Thanks!
          Peter
          AlphaBase Solutions, LLC

           [email protected]
          https://www.alphabasesolutions.com

          Comment

            #6
            Re: Evaluate_template Array not working

            I guess the problem is still:

            Code:
            ?eval("vArray[" + i + "].vDataField" + m)
ERROR: Property not found
vArray[] not found.
            The eval won't evaluate.
            Peter
            AlphaBase Solutions, LLC

             [email protected]
            https://www.alphabasesolutions.com

            Comment

              #7
              Re: Evaluate_template Array not working

              Peter in your last post you are trying to concatenate string and numeric data types.

              Try this:

              Code:
              i = 1
dim vArray[4] as P
vArray[1].vDataField = "Test"
?eval("vArray[" + ltrim(str(i)) +"].vDatafield")
= "Test"

              Comment

                #8
                Re: Evaluate_template Array not working

                Tom, I don't think that addresses my problem. Notice that vDatafield + m is a variable with a field name dynamically assigned.

                vDataField1 = "costs" 'a field name, as an example.
                Peter
                AlphaBase Solutions, LLC

                 [email protected]
                https://www.alphabasesolutions.com

                Comment

                  #9
                  Re: Evaluate_template Array not working

                  Originally posted by Peter.Greulich View Post
                  I guess the problem is still:

                  Code:
                  ?eval("vArray[" + i + "].vDataField" + m)
ERROR: Property not found
vArray[] not found.
                  The eval won't evaluate.
                  When did vArray arrive?

                  Previous snippets don't mention it.

                  It does look like we forgot to handle vDatafield though.

                  ? eval("Array[" + i + "]."+vDataField + m)

                  Code:
                  vdata = 8
vdatafield = "costs"
i = 1
m = 1

? "("+vData+" * Array[" + i + "]."+vDataField + m + ")/yMax"
= "(8 * Array[1].costs1)/yMax"
                  There can be only one.

                  Comment

                    #10
                    Re: Evaluate_template Array not working

                    The string you pass to Eval() cannot contain numerics.

                    Code:
                    dim i as N
dim m as N
i = 1
m = 1
dim vArray[4] as P
vArray[1].vdatafield1 = "Test"
?eval("vArray["+ltrim(str(i))+"].vdatafield"+ltrim(str(m)))
= "Test"

                    Comment

                      #11
                      Re: Evaluate_template Array not working

                      Stan: Forget the vArray. I'm doing too many things at once.

                      Here's what happens w. your suggestion:

                      ? eval("Array[" + i + "]."+vDataField + m)
                      ERROR: Variable "vDataField" not found.
                      Peter
                      AlphaBase Solutions, LLC

                       [email protected]
                      https://www.alphabasesolutions.com

                      Comment

                        #12
                        Re: Evaluate_template Array not working

                        Tom, doesn't work w. my data set pulled from table:

                        ?eval("vArray["+ltrim(str(i))+"].vdatafield"+ltrim(str(m)))
                        ERROR: Property not found
                        vArray[] not found.
                        Peter
                        AlphaBase Solutions, LLC

                         [email protected]
                        https://www.alphabasesolutions.com

                        Comment

                          #13
                          Re: Evaluate_template Array not working

                          Although,this works using your data set, Tom:

                          ?eval("vArray[i].vdatafield"+m)
                          = "Test"

                          Numerical values are ok .
                          Peter
                          AlphaBase Solutions, LLC

                           [email protected]
                          https://www.alphabasesolutions.com

                          Comment

                            #14
                            Re: Evaluate_template Array not working

                            Notice that the 1st one works, but the substitution does not.

                            Code:
                            ? eval("Array[i]" + "." + vDataField2)
= 98452

? eval("Array[i]" + "." + "vDataField" + m)
ERROR: Property not found
Array[] not found.
                            Peter
                            AlphaBase Solutions, LLC

                             [email protected]
                            https://www.alphabasesolutions.com

                            Comment

                              #15
                              Re: Evaluate_template Array not working

                              Code:
                              dim array[8] as p
vdatafield = "costs"
i = 1
array[1].costs1 = 10

? "Array["+i+"]." + vDataField + m
= "Array[1].costs1"

? eval("Array["+i+"]." + vDataField + m)
= 10
                              There can be only one.

                              Comment

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