Why does this not work ?

[Peter Bogdanoff]

I think that 'item 1 of t1’ has to be resolved to an object reference before it can be used with the vis property. The earlier lines are doing that, but not the last. 

It seems that LiveCode has gotten stricter with this in recent versions, requiring “of me” or such when referring directly to a control. Some later version of 8.1 was breaking my existing scripts for this very reason.

Peter

> On Jun 10, 2019, at 8:44 PM, Alex Tweedly via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> OK, this code produces an error - but I can't see why (and I worry about that :-)
> 
> I have a field inside a group inside a group ....,
> 
> and the following code :
> 
>> on mouseup
>>    local tName, t1, t2
>>    put the long name of fld "F" into tName
>>    put tName & ",12,13" into t1
>>    put "t1" && t1 &CR after msg
>> 
>>    put item 1 of t1 into t2
>>    set the vis of t2 to TRUE
>>    put "t2 was OK" &CR after msg
>> 
>>    set the vis of (item 1 of t1) to TRUE
>>    put "using parens OK" &CR after msg
>> 
>>    set the vis of item 1 of t1 to TRUE       -- this line fails !!
>>    put "here" &CR after msg
>> 
>> end mouseup
> that line fails, with the error message
> 
>> button "Button": execution error at line 14 (Chunk: error in object expression) near "field "F" of group id 1005 of group id 1007 of card id 1002 of stack "/Users/alextweedly/Dropbox (Personal)/Apps/objectchunk.livecode"
>> 
> 
> I just cant see why that doesn't work :-)
> 
> If I use parentheses, or if copy the first item over to a different variable), then it is all OK. But doing it directly (AFAICT) should work, and doesn't. What am I misunderstanding ?
> 
> Thanks
> 
> Alex.
> 
> 
> 
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