Say I have a list of items with prices like this:
[{:dog=>3.0}, {:cat=>5.0},{:dog=>3.0}]
how could i collate the dog hashes as they are the same, and maybe produce something like this:
[{:dog=>6.0},{:cat=>5.0}]
or (it may be clearer to have something like this):
[{tally=>2, :dog=>3.0}, {tally=>1, :cat=>5.0}]
