Using a variable to refer to custom properties

[sritcp]

I have a repeat loop that strings together the names of custom properties

Code: Select all

repeat for each item tMenuChoice in sMenuList
      put the ("c" & tMenuChoice & "NumOfParas") of this card into tNum
........

which gives the compilation error: "Expression: bad factor" in the parenthesized region.
The parenthesis parses correctly if tested independently.

This raises a question: Do property names always have to be literal? That is, is the statement
put the variableContainingPropertyName of the yourObject
not possible?

Thanks,
Sri.

[Klaus]

Hi sri,

use IT:

Code: Select all

repeat for each item tMenuChoice in sMenuList
      get "c" & tMenuChoice & "NumOfParas"
      put the IT of this card into tNum
........

or a variable with its name already concatenated!

Code: Select all

repeat for each item tMenuChoice in sMenuList
      put "c" & tMenuChoice & "NumOfParas" into tProp
      put the tProp of this card into tNum
........

Best

Klaus

[magice]

Try it in a "do" statement.

[FourthWorld]

The suggestions given thus far are good ones, and here's one more I find especially convenient for cases in which I need to work with property names that can't be known in advance: use array syntax.

This will put a value into a custom property within a custom property set named "MyPrefs", and the second handler retrieves it:

Code: Select all

on SetValue pKey, pVal
   set the MyPrefs[pKey] of stack "SomePrefs" to pVal
   save stack "SomePrefs"
end SetValue

on GetValue pKey
    return the MyPrefs[pKey] of stack "SomePrefs"
end GetValue

[sritcp]

Thanks everyone, for the suggestions!

Klaus,
I didn't think of trying

Code: Select all

put "c" & tMenuChoice & "NumOfParas" into tProp
      put the tProp of this card into tNum

because I thought that was exactly what parenthesis did (evaluate what is inside it and put it in a temporary variable).
I guess logic doesn't always work!

Regards,
Sri.

[Klaus]

Hi sri,

Klaus,
I didn't think of trying

Code: Select all

put "c" & tMenuChoice & "NumOfParas" into tProp
      put the tProp of this card into tNum

because I thought that was exactly what parenthesis did (evaluate what is inside it and put it in a temporary variable).
I guess logic doesn't always work!

yep, the parenthesis sound logical, but the engine is extremely picky in this case


Best

Klaus

[phaworth]

I entered bug# 13086 at the QCC q wgile back. Seemed to get a favorable review by Mark Waddingham but it hasn't been fixed yet.
Pete