jeffscottbrown

@groovy.transform.CompileStatic
class TwoException extends Exception {
    public TwoException(Throwable t) {
        super(t)
    }
}

public TwoException(java.lang.Throwable);
  Code:
   0:  iconst_1

jeffscottbrown

core 2.3.x $ ./gradlew -Dtest.single=BinaryPluginSpec :grails-core:test --stacktrace
:buildSrc:compileJava UP-TO-DATE
:buildSrc:compileGroovy UP-TO-DATE
:buildSrc:processResources UP-TO-DATE
:buildSrc:classes UP-TO-DATE
:buildSrc:jar UP-TO-DATE
:buildSrc:assemble UP-TO-DATE
:buildSrc:compileTestJava UP-TO-DATE
:buildSrc:compileTestGroovy UP-TO-DATE
:buildSrc:processTestResources UP-TO-DATE

jeffscottbrown

    public interface MyInterface<T extends MyInterface> {
        T someMethod();
    }

    public class FirstWidget implements MyInterface<FirstWidget> {
        public FirstWidget someMethod() {
            return this;
        }
    }

jeffscottbrown

groovyquestion $ cat Demo.groovy 
class Demo {
    // this is an empty class
}
groovyquestion $ 
groovyquestion $ groovyc Demo.groovy 
groovyquestion $ 
groovyquestion $ javap -private Demo
Compiled from "Demo.groovy"
public class Demo implements groovy.lang.GroovyObject {

jeffscottbrown

mapstuff $ cat demo.groovy 

// This is just an example to demonstrate a possibilty,
// not a recommendation of best practice.

Map.metaClass.someMethodName = { key, defaultValue ->
    delegate.containsKey(key) ? delegate[key] : defaultValue
}

def map = [name: 'Jeff', town: 'St. Louis']

jeffscottbrown

/*
  Apparently http://stackoverflow.com/users/2970947/elliott-frisch doesn't believe that
  Java enums can have state.  
  
  http://stackoverflow.com/questions/24447233/store-enum-class-reference?noredirect=1#comment37829803_24447233
 */
 public enum MyEnum {
    ONE(1), TWO(2);

    public int value;

jeffscottbrown

grails11577 $ java -version
java version "1.8.0-ea"
Java(TM) SE Runtime Environment (build 1.8.0-ea-b106)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b48, mixed mode)
grails11577 $ 
grails11577 $ cat application.properties 
#Grails Metadata file
#Fri Jul 11 14:22:05 CDT 2014
app.grails.version=2.4.2
app.name=grails11577

jeffscottbrown

@Grab(group='org.gperfutils', module='gbench', version='0.4.2-groovy-2.1')

def smallList = [[first: 'John', last: 'test']]

def largListWithMatchAtEnd = []
10000.times { largListWithMatchAtEnd << [first: 'Johnx', last: 'test'] }
largListWithMatchAtEnd << [first: 'John', last: 'test']

def largListWithMatchInCenter = []
5000.times { largListWithMatchInCenter << [first: 'Johnx', last: 'test'] }

jeffscottbrown

joint_compile $ ls
FirstGroovy.groovy	FirstJava.java		SecondGroovy.groovy	SecondJava.java
joint_compile $ cat FirstGroovy.groovy 
class FirstGroovy {
    FirstJava firstJava
}

joint_compile $ cat FirstJava.java 
public class FirstJava {
    SecondGroovy secondGroovy;

jeffscottbrown

trait $ cat SomeTrait.groovy 
trait SomeTrait {
    int getMagicNumber() {
        42
    }
}
trait $ cat SomeClass.groovy 
class SomeClass implements SomeTrait {
    static magicNumber = 'Forty Two'
}