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Aug 16th, 2018
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  1. let array = ["1,8", "3,5", "2,5", "4"]
  2. let sortedArray = array.flatMap({ Double($0.replacingOccurrences(of: ",", with: ".")) }).sorted()
  3. print(sortedArray) //[1.8, 2.5, 3.5, 4.0]
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