Implicit class providing requiring methods.
Implicit class providing requiring methods. This class is based on
Predef.ensuring in the Scala standard library. The difference is that
this class's methods throw IllegalArgumentExceptions rather than
AssertionErrors.
An example adapted from Predef's documentation:
import akka.util.Helpers.Requiring def addNaturals(nats: List[Int]): Int = { require(nats forall (_ >= 0), "List contains negative numbers") nats.foldLeft(0)(_ + _) } requiring(_ >= 0)
Converts a "currentTimeMillis"-obtained timestamp accordingly:
Converts a "currentTimeMillis"-obtained timestamp accordingly:
"$hours%02d:$minutes%02d:$seconds%02d.$ms%03dUTC"a "currentTimeMillis"-obtained timestamp
the formatted timestamp
Create a comparator which will efficiently use System.identityHashCode,
unless that happens to be the same for two non-equals objects, in which
case the supplied “real” comparator is used; the comparator must be
consistent with equals, otherwise it would not be an enhancement over
the identityHashCode.