fumokmm

import java.util.concurrent.ExecutorService
import java.util.concurrent.BlockingQueue
import java.util.concurrent.LinkedBlockingQueue
import java.util.concurrent.Executors
import java.util.concurrent.Callable

def executor = Executors.newSingleThreadExecutor()
// Closure as Interfaceパターン！
def future = executor.submit( {
  def list = []

fumokmm

@Grab(group='joda-time', module='joda-time', version='*')
import org.joda.time.*

//def rand_date(def fr, def to) { // java...
def rand_date = {fr,to->          // groovy!!
  def d = new DateTime(fr)
  def range = Days.daysBetween(d, new DateTime(to)).getDays() + 1
  d.plusDays((Integer)Math.floor(Math.random() * range)).toString("yyyy-MM-dd")
}

fumokmm

def worker = { latch, num ->
    println "ready: $num"
    latch.countDown()
    Thread.sleep(num * 10)
    println num
}

def latch = new java.util.concurrent.CountDownLatch(args.size())
args.each {
    Thread.start worker.curry(latch, it as int)

fumokmm

@GrabResolver(name='jsciencerepos', root='http://maven.obiba.org/maven2/')
@Grab('org.jscience:jscience:4.3.1')

import org.jscience.physics.amount.*

def a = Amount.valueOf("1 m")
def b = Amount.valueOf("2 m")

Amount.metaClass.negative {
    opposite()

fumokmm

class Hello {
  void hello(){ println "1" }
}
def a = new Hello()
def b = new Hello()
println '-' * 10

b.metaClass.hello = { println "2" } 
print '[1] '; a.hello() // => 1
print '[2] '; b.hello() // => 2 (metaClass.hello が呼ばれる)

fumokmm

def array = []
def tmp = ""
array = ('0'..'9') + ('a'..'z') + ('A'..'Z') + '_'

(1..16).each {
  tmp += array[Math.floor(Math.random() * array.size()) as int]
}
println tmp