Daniel Wu questions

• failed to create ec2 instance using terraform if set security group
• how to get the column name list from a table in clojure
• Possible to run the same job with different trigger in quartz?
• How to handle null in Anorm
• what's the purpose of an empty trait in scala
• run sql in parallel using future: but the sql is not executed
• How to flatten a tuple, as flatMap is not defined over tuples?
• How to get a set of elements in a list based on element index in Scala?
• spring application doesn't quit
• Why need a blank line after process(aString)! in scala?

Daniel Wu answers