twArrayAsList( aArray, cDelimiter )
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     Return a delimited list from a passed array.

       Arguments:

     aArray     - 'A' a One dimensional array of character strings.

     cDelimiter - 'C' Delimiter character. Defaults to a comma.

       Return:

     A string containing a delimited list of the passed array elements.

       Example:

     twArrayAsList( { "One", "Two",, "Four", Five" } )

                        -> One,Two,,Four,Five