Hao Ren questions

• scala Int class abstract def without concrete implementation
• How to mock scala readLine
• Use Serializable lambda in Spark JavaRDD transformation
• why AnyVal can be converted into AnyRef at run time in Scala?
• Java Array initialization with type casting
• Difference between scala's ClassTag and TypeTag
• Difference when serializing a lazy val with or without @transient

Hao Ren answers