de-duping an array of Hashes based on a given hash key

gistfile1.rb

#assumption that all Hashes have the de-dupe key, and the de-dupe key represents a unique
#identifier 
 
def dedupe_by_key array,key
  collector = {}

  array.each{|element|
    collector[element[key]] = element
  }

  collector.values
end