莱布尼兹

ref :scala object 转Class Scala强制类型转换

   the flows of distributing a scala project by using scala sbt(scala simple build tool) plugin,sbt assembly plugin through 'create scala project','download dependent jars','publish scala project'...

  after a heavy cost time(primary at download huge number of jars),the first example from book 'learning spark' is run through.   the source code is very simple/** * Illustrates flatMap + co...