From: Joel Pearson <lists@...>
Date: 2013-06-18T00:52:26+09:00
Subject: Re: Compare and sort one array according to another.

If the items within each array belong to each other, how about a 
multidimensional array?

arr = [
[ Obj1(prop1, prop2, id), OthrObj1(prop1, prop2, ref_id) ],
[ Obj2(prop1, prop2, id), OthrObj2(prop1, prop2, ref_id) ],
[ Obj3(prop1, prop2, id), OthrObj3(prop1, prop2, ref_id) ]
]


All the sorting is dealt with together then:

sorted_arr = arr.sort_by { |obj1, obj2| obj1.id }

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