Odd Empty behavior

Peter Haworth pete at lcsql.com
Tue Jul 1 16:03:34 EDT 2014


Livecode always returns true if you test an array for empty, although I
think that behavior might have changed in a recent release. test["data"] is
an array since it has the "a1" subkey.

I think this will tell you if test["data"] has any subkeys or not and thus
whether it's empty or not:

if test["data"] is an array

Pete
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On Tue, Jul 1, 2014 at 11:58 AM, William Prothero <prothero at earthednet.org>
wrote:

> Folks:
> LC 6.6.0, OSX 10.9.3
> I have the following script:
>
>    put "XX" into test["data"]["a1"]
>    if test["data"] is empty then
>       answer "It is empty"
>    else
>       answer "Not empty"
>    end if
>
> I would think that if there was some value in test[“data”], it would
> return “Not empty”. However, it returns empty. I think this is a very
> unexpected behavior because I think of the “a1” value of test as a
> subarray, especially since test[“a1”] doesn’t have the set value. In fact,
> test[“data”] is not empty. It contains the subarray [“a1”].
>
> Is this a bug or just a livecode oddity?
>
> Thanks,
> Bill
>
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