Groovy puzzlers

if (true) {
    def key = 'x'
    def map = [key: 'treasure']
    def val = map.get(key)
    println val
}
if (true) {
    def map = [2: 'treasure']
    def key = 2
    def val = map."$key"
    println val
}
if (true) {
    List<Long> list = [1,2,3]
    def now = new Date()
    list << now
    println list
    println list*.class.name
}
if (true) {
    def map = [metaClass: "Frequency"]
    println "What's the $map.metaClass, dude?"
}

def static hello(n) {
    ['9': "Hell${n}, Alex!"]
}
def result = hello 09
println result