On 10/27/2014, 1:55 PM, dunb...@aol.com wrote:
on mouseUp
local b
answer b + 1
end mouseUp
Also works just fine, thank you, and therefore the engine still knows what to do
Right, because even if you put empty into the variable first (as in your
second message) the act of doing a math calculation forces the variable
to zero. It happens internally, so you don't see it.
put empty into b
put b = zero -- false
put b+1 -- 1, because empty has converted to zero internally
put b = zero -- false
The point being that until it is used, empty can be either empty or
zero. Usage determines the value. However, the last line above will put
"false", because the engine restores the original value if it was specified.
This throws an error:
on mouseUp
put b = zero -- false
put b = "" -- false
put b+1 -- ERROR
end mouseUp
So we can apparently confuse the engine into not knowing what the value
should be.
--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software | http://www.hyperactivesw.com
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