On 2023-10-24 18:00, Paul Dupuis via use-livecode wrote:
I think I found a oddity in the "currentCard" property.
The documentation states that the currentCard property return the short
name of the current card of a stack:
for example: put the currentCard of stack "Untitled 1" into tCardName
You can then execute code such as: set the myProperty of cd tCardName
of stack "Untitled 1" to tValue
...
But again, breaking that example above (set the myProperty of the
currentCard of stack "Untitled 1" to tValue) into 2 lines:
put the currentCard of stack "Untitled 1" into tCardName
set the myProperty of cd tCardName of stack "Untitled 1" to tValue
FAILS if the card has no name.
Something just seems off here?
As Jacque said, if an object has an empty name then the short name
returns `<chunk> id <id>` (i.e. an id chunk) - this is long standing
behavior and one which I'm not sure is entirely helpful (it should
perhaps just return empty!).
You see the same effect in other properties which return a 'short name'
- e.g. the menubar of a stack. So its entirely consistent with 'object
name' properties. (In these cases there is no string which such
properties could return which would help distinguish unnamed things and
that could be used to resolve them in some sort of chunk in a consistent
manner as object names can be arbitrary strings).
If you want to do stuff with the current card of a stack, then don't use
the currentCard property - 'this card of stack ...' *is* a chunk
reference and thus it doesn't care whether the card has a name or not.
If you want the long id of the current card of a stack to manipulate
'out of context' then use the long id:
put the long id of this card of stack ... into tCardId
Of course, if you really want to use the currentCard (for whatever
reason), then you need to make sure all your cards have names (which to
be fair, is a good habit to get into - as is naming all objects with
some, unique, name!).
Warmest Regards,
Mark.
--
Mark Waddingham ~ m...@livecode.com ~ http://www.livecode.com/
LiveCode: Build Amazing Things
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