Groovy Метод remove на списке и на диапазоне

Q = [6, 5, 4, 3, 2, 1] 
println "Q = $Q"
N = Q.remove(1)
println "N = $N"
println "Q = $Q"

Q = 6..1
println "Q = $Q"
N = Q.remove(1)
println "N = $N"
println "Q = $Q"

def Spisok() {
  N = []; Q = n..1
   for(i in Q) {N += Q.remove((int)Math.random()*i)}
     N
}

package groovy
def Vvod() {print "Vvedite n = "; s = System.in.newReader().readLine(); n = s as Integer}
def Vector() {N = []; Q = n..1; for(i in Q) {T = (int)Math.random()*i; N += Q[T]; Q -= Q[T]}; N}
def Vivod() {println "Spisok = $N"}
while(1) {
  Vvod(); if(n == 0) break
  Vector(); Vivod()
}

package groovy
def Vvod() {print "Vvedite n = "; s = System.in.newReader().readLine(); n = s as Integer}
def Vector() {
  W = []; for(j in n..1) {W += j}
   N = []; for(i in n..1) {N += W.remove((int)Math.random()*i)}
}
def Razmer() {def D = {W = Math.sqrt(n)}; while(D{}%1 != 0) ++n; W}
def Shag(j) {
  L = ""; for(i in 1..s.size()) L += " "; for(i in 1..(j as String).size()) L -= " "
}
def Vivod() {
  println "Spisok!"; R = 1
   for(j in N) {Shag(j); if(R%W != 0) print "$L $j" else {print "$L $j"; println()}; ++R} 
     println()
}
while(1) {
  Vvod(); if(n == 0) break
  Vector(); Razmer(); Vivod()
}