user5102379 questions

user5102379 answers

• How to use java Map<String, Object> where scala Map[String, Any] is requred?
• How to initialize trait's vals in subtrait?
• How to sum values and group them by a key value in Scala's List of Map?
• Scala sys.env for undefined environment variables
• Scala code crashing with java.util.NoSuchElementException: next on empty iterator
• Is it possible and how to have var that can only be set once?
• Is there a naming convention for implicit classes?
• What `JObject(rec) <- someJArray` means inside for-comprehension
• Benefit of explicitly providing the method return type or variable type in scala