valueDiff for arrays?

[Dick Kriesel]

> On Aug 7, 2018, at 9:29 PM, Jerry Jensen via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
>> On Aug 7, 2018, at 8:35 PM, Mark Wieder via use-livecode <use-livecode at lists.runrev.com> wrote:
>> 
>> On 08/07/2018 07:57 PM, Dick Kriesel via use-livecode wrote:
>>> On Aug 7, 2018, at 5:47 PM, Alex Tweedly via use-livecode <use-livecode at lists.runrev.com> wrote:
>>>> 
>>>> Is there an easy way to test whether an array is (currently) a sequence array ?
>>>> 
>>>> something easier than
>>>> put the extents of tArray into tmp
>>>> if item 1 of tmp = 1 AND item 2 of tmp = the number of elements in tArray then
>>> slightly easier, at least:
>>> function isSequence p
>>> return the extents of p is 1, number of elements in p
>>> end isSequence
>> 
>> If I'm understanding things right there's more to it:
>> The keys all have to be integers and (I think) only those integers from 1 to (the number of keys).
> 
> That was my understanding as well.
> .Jerry

"the extents" implements those rules, so "isSequence" doesn’t need to.

Or is there evidence "isSequence" fails?

— Dick