rrgroovy

assert 'HI, GROOVYIST' == 'Hi, Groovyist'.toUpperCase()
assert 'hi, groovyist' == 'Hi, Groovyist'.toLowerCase()

rrgroovy

// 1. String#substringを使う。
assert '0123456'.substring(2, 4) == '23'

// 2. Object#getAtで範囲を使う。 (GDK)
assert '0123456'[2..3] == '23'
assert '0123456'[2..<4] == '23'

rrgroovy

assert 'foobar' == 'foo' + 'bar'

rrgroovy

assert 100 == Math.abs(100)
assert 100 == Math.abs(-100)
assert 0 == Math.abs(0)

rrgroovy

'abcdef'.each {
  println it
}
for (s in '123456') {
  println s
}

rrgroovy

def origin = 'あいうえお'
def encoded = '%E3%81%82%E3%81%84%E3%81%86%E3%81%88%E3%81%8A'

assert URLEncoder.encode(origin, 'UTF-8') == encoded
assert URLDecoder.decode(encoded, 'UTF-8') == origin

rrgroovy

class BubbleSort {
  def list
  def sort() {
    def eachPairIndex = { Collection l ->
      def range = 0..<l.size()
      [range, range.tail()].transpose()
    }
    while (! eachPairIndex(this.list).inject(true) { rslt, idx ->
      if (! (this.list[idx[0]] < this.list[idx[1]]) ) {
        use(Collections){ this.list.swap(idx[0], idx[1]) }