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calculated value in ?headers of hiCreateReportField

The Consultant

Hi,

i creat a form with an report field. The value in the header should not a fixed value in the code, it should be a varialbe.

but i get an error, fixnum req.

 

here is the code

------------------------------------------------

width = 30x ( some digit)

reportField = hiCreateReportField(
        ?name       'reportField
        ?title      "Report"
        ?selectMode 'multiple
        ?headers    '(
                       ("obj-type"     75   'left)
                      ("l"            75   'left)
                      ("pp"           75   'left)
                      ("description"  width   'left)
                      )
        ?choices     ch
)

-----------------------------------------

 

 if i change with to e.g. 100 , everything is fine.

Parents

  • If you use '(...) the list is quoted which means that nothing is evaluated inside the list. You have a couple of choices:

            ?headers    list(
                          list("obj-type"     75   'left)
                          list("l"            75   'left)
                          list("pp"           75   'left)
                          list("description"  width   'left)
                          ) 

    Or you could use the backquote approach which allows selective evaluation of things preceded by a comma (note the 'left will be quoted - so don't really need the quote either):

            ?headers    `(
                          ("obj-type"     75   left)
                          ("l"            75   left)
                          ("pp"           75   left)
                          ("description"  ,width   left)
                          ) 

    Sometimes the backquote approach is cleaner because it is clearer when you are just inserting a small number of values into an otherwise static list structure. It's actually a macro which expands into list() (and other function calls).

    Regards,

    Andrew.

Reply

  • If you use '(...) the list is quoted which means that nothing is evaluated inside the list. You have a couple of choices:

            ?headers    list(
                          list("obj-type"     75   'left)
                          list("l"            75   'left)
                          list("pp"           75   'left)
                          list("description"  width   'left)
                          ) 

    Or you could use the backquote approach which allows selective evaluation of things preceded by a comma (note the 'left will be quoted - so don't really need the quote either):

            ?headers    `(
                          ("obj-type"     75   left)
                          ("l"            75   left)
                          ("pp"           75   left)
                          ("description"  ,width   left)
                          ) 

    Sometimes the backquote approach is cleaner because it is clearer when you are just inserting a small number of values into an otherwise static list structure. It's actually a macro which expands into list() (and other function calls).

    Regards,

    Andrew.

Children
No Data

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