Retrieve List of Array Properties?

[Richard Gaskin]

Scott Rossi wrote:
> Recently, Dave Cragg wrote:
>> One further way...
>>
>>  get the customKeys["specialData"] of field 1
> 
> *THIS* is what I had in my mind of how it should work, but couldn't get the
> syntax right.  Thanks very much Dave.

Whoa.  Never seen that before.

I have mixed feelings about the syntax, wondering whether () might be 
more appropriate than [] in that context.

Has this been in the docs all these years and I've somehow missed it?

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  Richard Gaskin
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