groovy_loosies/cidr2.groovy

def packAddr(symbolic) {
  packd = 0
  symbolic.split(/\./).eachWithIndex { b, i ->
    packd |= (b as Long) << (8*(3-i))
  }
  return packd
}

def packIP(symbolic) {
  i = 0
  symbolic.split(/\./).inject(0) { p, b ->
    p |= (b as Long) << (8*(3-(i++)))
  }
}

def packIt(symbolic) {
  symbolic.split(/\./)*.toLong().inject([p:0,i:0]) { m, b ->
    [p: m.p |= b << (8*(3-m.i++)), i: m.i]
  }.p
}

def unpackIt(packed) {
  (0..3).collect(new ArrayList()) { i ->
    packed >>> (8*(3-i)) & 255
  }.join('.')
}

def addr = '198.50.24.68'
def pckd = 3325171780

println packIt(addr)
println unpackIt(pckd)

[addr.split(/\./),[24,16,8,0]].transpose().collect(new HashSet()) { m ->
  (m[0]as Long) << m[1]
}.sum()