Ruby sort by multiple values?

Question

I have an array of hashes:

a=[{ \'foo\'=>0,\'bar\'=>1 },
   { \'foo\'=>0,\'bar\'=>2 },
   ... ]

I want to sort the array first

Answer 1

comparison of Array with Array failed

This means (at least in my case) that the types of array elements are different. When I made sure all array items are of the same time (Integer, for example), sorting started to work.