From: Paul <tester.paul@...>
Date: 2010-09-23T07:35:09+09:00
Subject: Sorting problem with an Array of Arrays

Hi there, I have an array of arrays that looks like the following:

arr1 = [["ABC-1", 1271768400, 2],  ["ABC-2", 1271773800, 1],
 ["ABC-3", 1271863200, 2],  ["ABC-4", 1271869200, 2],
 ["AAA-1", 1271862000, 2],  ["DEF-1", 1271772000, 1]]

Desired sort order:
(1) label (1st element = all unique)
(2) different labels (e.g. AAA, DEF) need to be inserted according to
timestamp (2nd element), but maintain (1) label sort order; so AAA-2
can't come before AAA-1. (I don't have that data point here but it
happens)

=> I don't know how to do (2), so I just have the AoA sorted by (1)
right now.

Is there a way to do this?  I'm trying to find duplicate and
overlapping timestamps but my current method for checking this is
getting complicated, so I thought I'd check to see if there's a good
way to sort the data properly in the first place.

TIA.