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skill code to manipulate string fields inside a form

Danilo P

 Hello,

Could someone suggest the reason why the following skill is wrong? Simply I need to clean field1, field2 and field3 in the form, but the "foreach"cycle in the clean() procedure doesn't do that. Only I am able to clean the field 3, with the command outside from the cycle.

Is there any difference between the fist way and the second way? Of course this is just a very simplified example, my code is more complex and I need to delete fields whose names are member of a list.

Thank you

Danilo

procedure(test()

let(()

      fields = list(

            list( hiCreateStringField( ?name 'field1 ?prompt "Field1" ?value "10" ) 10:10 100:100 40)

            list( hiCreateStringField( ?name 'field2 ?prompt "Field2" ?value "20" ) 110:10 100:100 40)

            list( hiCreateStringField( ?name 'field3 ?prompt "Field3" ?value "30" ) 210:10 100:100 40)

            list( hiCreateButton(?name 'cleanButton ?buttonText "clean" ?callback "clean()") 10:100 50:50)

      )

      hiCreateAppForm(?name 'test_form ?formTitle "TEST FORM" ?initialSize t ?fields fields )

      hiDisplayForm('test_form)

))


procedure(clean()

let(()

      foreach(item list("field1" "field2")

            test_form~>item~>value = ""

      )

      test_form~>"field3"~>value = ""

))

 

 

  • Hi Danilo,

    > Could someone suggest the reason why the following skill is wrong?
    > Simply I need to clean field1, field2 and field3 in the form, but the
    > "foreach"cycle in the clean() procedure doesn't do that. Only I am
    > able to clean the field 3, with the command outside from the cycle.
    >
    > foreach(item list("field1" "field2")
    > test_form~>item~>value = ""
    > )

    The ~> infix operator maps to the getSGq macro, which quotes its second
    argument—so that it does not get evaluated as a variable. You could use
    the "naked" get function instead:

    let( (widget)
    foreach(item list("field1" "field2")
    widget = get(test_form concat(item))
    widget~>value = ""
    )
    )

    Cheers, -D

    --
    http://crosstwine.com
    tel: +49 89 2189 2939
    cell: +49 174 3489 428

    “Strong Opinions, Weakly Held”
    — Bob Johansen

  • Thank you very much.

    It works of course, but most important aspectfor me is that I learnt something I completely ignored before.

    Cheers, Danilo 

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