Hi,

In message "Re: [RCR] array or with non-array"
    on Wed, 3 Aug 2005 23:31:05 +0900, Michael Campbell <michael.campbell / gmail.com> writes:

|Why not [2, 1, 3, 4] or [1, 3, 2, 4] or [1, 3, 4, 2] here? Arrays have
|an ordering; how do you specify where your new element goes?

It's random.  It uses Hash inside.

							matz.