OK, like PHP arrays 

On 3/16/18, 8:23 AM, "4D_Tech on behalf of Jeff Grann via 4D_Tech" 
<4d_tech-boun...@lists.4d.com on behalf of 4d_tech@lists.4d.com> wrote:

    Haven’t worked with them yet, but my understanding is that a collection is 
an ordered list of values of possibly varying types.  In 4D arrays, all of the 
values must be the same type.  In a 4D collection, you can use mixed types as 
the elements.
    
    Example:
    
    $MyCollection[0]:=“Hello”
    $MyCollection[1]:=5
    $MyCollection[2]:=$AnObject
    $MyCollection[3]:=$AnArray
    $MyCollection[4]:=True
    
    ----------
    Jeff Grann
    SuccessWare, Inc.
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