Change the key to Hashes in the Array from string to symbol.

gistfile1.rb

src = [{"a"=>"aaa", "b"=>"bbb"}, {"c"=>"ccc"}]
src.map{|x| x.each_with_object({}) {|(k, v), h| h[k.to_sym] = v}}
#=> [{:a=>"aaa", :b=>"bbb"}, {:c=>"ccc"}]