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mvn -Dtest=MyTest test
mvn -pl specific_project goal
mvn -Dmaven.test.skip=true install

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path to jrockit /usr/lib/jvm/java-6-jrmc4
then use 
sudo update-java-alternatives -l or -s to select your version of java


sudo update-alternatives --install /usr/bin/appletviewer appletviewer /usr/lib/jvm/java-6-jrmc4/bin/appletviewer 64
sudo update-alternatives --install /usr/bin/apt apt /usr/lib/jvm/java-6-jrmc4/bin/apt 64
sudo update-alternatives --install /usr/bin/extcheck extcheck /usr/lib/jvm/java-6-jrmc4/bin/extcheck 64
sudo update-alternatives --install /usr/bin/idlj idlj /usr/lib/jvm/java-6-jrmc4/bin/idlj 64
sudo update-alternatives --install /usr/bin/jarsigner jarsigner /usr/lib/jvm/java-6-jrmc4/bin/jarsigner 64

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clone with following remote submodules:
git clone git://github.com/stevej/emacs.git .emacs.d --recursive

update repo following remote submodules:
git submodule update --init --recursive

checkout remote branch
git checkout -b local-name origin/remote-name

delete remote branch

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sealed abstract class MyEnum
object MyEnum {
  def apply(str :String) :MyEnum { // do str conversions }

  object Val1 extends MyEnum
  object Val2 extends MyEnum
}

we need the abstract class for matching the enum type. It can't be a trait because the compiler gets confused with the apply method in the object. 

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v. 1.2.2 plugin dependencies are declared in application.properties
v. 1.3.7 plugin dependencies are declared in BuildConfig.groovy

null safe object navigation obj?.value
condensed ternary operator obj.value ?: "else this"
comparison <=>

call method on all objects in list listofobjs*.method
add items to list lst << "new item"
ranges .. ..< 

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child selector >
#parent > child

:last selector
#parent > *:last 
selects the last child of parent

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//Disable 3d acceleration
-Dsun.java2d.pmoffscreen=false

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package com.twitter.sbt

import sbt._
import Keys._
import Project.Initialize
import Process._
import scala.collection.JavaConversions._
import java.io.File

object CompileThrift extends Plugin {

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> sbt project [project]/[task]
> sbt project core/test

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var org_date_created;
var org_date_of_sale;

// zones ( local is for dev environments
local   = org.joda.time.DateTimeZone.getDefault();
cenZone = org.joda.time.DateTimeZone.forID('America/Chicago');

// dates from db in central
dc  = (new org.joda.time.DateTime( date_created )).withZoneRetainFields(cenZone);
dos = (new org.joda.time.DateTime( date_of_sale )).withZoneRetainFields(cenZone);