In the 4D case and in the cases below (plus PHP), I suspect a collection is 
really just an "object" (hash table) with numeric keys instead of string keys. 
For example, if I write

$collection := New collection()
$collection[247] := "fred"

I doubt that it creates 247 (indexes 0-246) empty elements in the collection. 
Would love to hear confirmation or denial from some one at 4D that knows the 
internals.

John DeSoi, Ph.D.
 


> On Mar 21, 2018, at 4:19 PM, Lee Hinde via 4D_Tech <[email protected]> 
> wrote:
> 
> Please. You mean like an array in almost any other language:
> 
> python:
> x = ["fred", 2, {"test":4}]
> 
> javascript:
> var x = ["fred", 2, {"test":4}];

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