1. 1
201
http://www.flickr.com/photos/compujeramey

3. $ time groovy -e 'println "Hello, world!";'
Hello, world!
real 0m1.177s
user 0m1.321s
sys 0m0.171s
$ time groovyclient -e 'println "Hello,
world!";'
Hello, world!
real 0m0.029s
user 0m0.001s
sys 0m0.002s

4. http://jira.codehaus.org/browse/GROOVY-5101

5. https://github.com/downloads/kobo/groovyserv/
groovyserv-0.10-SNAPSHOT-21eda1f.jar

9. http://gihyo.jp/book/2011/978-4-7741-4727-7

16. http://www.flickr.com/photos/yto/

19. // this pipe generated by kiyotaka
def url = 'http://pipes.yahoo.com/pipes/pipe.run?_id=081f8f5039
194af0f25909129d6d007d&_render=rss'
def items = new XmlParser().parse(url).channel.item
def cols = 'pubDate title description'.tokenize()
groovy.swing.SwingBuilder.build {
frame(id:'f', title: 'Japanese Groovy Blogs', visible:true) {
scrollPane {
table {
tableModel(list: items) {
cols.each { col ->
closureColumn header: col, read: { it[col].text() }
}
}
}
}
}
f.pack()
}

21. http://www.flickr.com/photos/luilainez

24. http://www.flickr.com/photos/taniasaiz
!!
New

26. invite “You” to javaone

27. invite(“You”).to(javaone)

28. def invite(subject) {
[ to : { target -> target.add(subject) } ]
}
def javaone = []
invite(“You”).to(javaone)
assert javaone == ["Nakano”, "<Your Name>"]

29. def invite(subject) {
[ to : { target -> target.add(subject) } ]
}
def javaone = []
invite(“You”).to(javaone)
assert javaone == ["Nakano”, "<Your Name>"]

30. def invite(subject) {
[ to : { target -> target.add(subject) } ]
}
def javaone = []
invite(“You”).to(javaone)
assert javaone == ["Nakano”, "<Your Name>"]

31. def invite(subject) {
[ to : { target -> target.add(subject) } ]
}
def javaone = []
invite(“You”).to(javaone)
assert javaone == ["Nakano”, "<Your Name>"]

32. def invite(subject) {
[ to : { target -> target.add(subject) } ]
}
def javaone = []
invite(“You”).to(javaone)
assert javaone == ["Nakano”, "<Your Name>"]
javaone.add(“You”)

33. invite “You” to javaone

34. http://www.flickr.com/photos/larsjuh

36. http://www.flickr.com/photos/eiriknewth

38. !!
New
http://www.flickr.com/photos/striatic

40. @groovy.util.logging.Log
class Foo {
def method() {
log.info('info message')
log.fine('fine message')
log.severe('severe message')
}
}
new Foo().method()
$ groovy astLog.groovy
Nov 9, 2011 1:09:10 PM java_util_logging_Logger$info call
INFO: info message
Nov 9, 2011 1:09:10 PM java_util_logging_Logger$severe call
SEVERE: severe message

41. @Immutable
class Foo {
int x
Date date = new Date(1000)
}
def a = new Foo(x:1)
assert a.x == 1
assert a.date.getTime() == 1000
a.date.setTime(2000)
assert a.date.getTime() == 1000
a.x = 3

42. @Singleton
class Foo {
def hello() { "hello" }
}
assert Foo.instance.hello() == "hello"
// => Caught: java.lang.RuntimeException:
// Can't instantiate singleton Foo. Use Foo.instance
new Foo()

43. class StringList {
@Delegate
List<String> list = new ArrayList<String>()
}
def stringList = new StringList()
stringList.add("A")
stringList.add("B")
assert stringList == ["A", "B"]
stringList.each { print it }
// => AB

44. @HelloWorld
x
$ groovy sample.groovy
Hello, World!

45. @GroovyASTTransformationClass("org.jggug.kobo.gastah.HelloWorldASTTransformation")
@Retention(RetentionPolicy.RUNTIME)
public @interface HelloWorld {
String value()
}
@GroovyASTTransformation(phase = CompilePhase.CANONICALIZATION)
class HelloWorldASTTransformation extends ClassCodeVisitorSupport implements ASTTransformation {
SourceUnit sourceUnit // forced to override by super class
public void visit(ASTNode[] nodes, SourceUnit source) {
AnnotatedNode target = (AnnotatedNode) nodes[1]
AnnotationNode includeAnnotation = (AnnotationNode) nodes[0]
def additionNode = new AstBuilder().buildFromCode({
println "Hello, World!"
})[0]
def statements = additionNode.statements
//
source.getAST().getStatementBlock().getStatements().clear()
source.getAST().getStatementBlock().getStatements().addAll(0, statements)
}
}
https://github.com/nobeans/jggug-20110617

49. ld !
O
http://www.flickr.com/photos/solarbotics

51. ld !
O