Break out of multiple for loops in Ceylon

Question

Let's say I have I several nested for loops in Ceylon. How do I break out of all the loops:

variable Integer? something = null;
for (i in 0:3) {
  for (j in 0:3) {
    for (k in 0:3) {
      something = someFunction(i,j,k);
      if (something exists) {
        // break out of everything, we found it
      }
    }
  }
}

Answer 1

One way to do it is to wrap the whole thing in a closure and then call it using return when you want to break out of everything:

Integer? doLoops() {
  for (i in 0:3) {
    for (j in 0:3) {
      for (k in 0:3) {
        Integer? something = someFunction(i,j,k);
        if (something exists) {
          return something;
        }
      }
    }
  }
  return null;
}
Integer? something = doLoops();

Because Ceylon supports closures, you can also read and write other values outside the function in the scope where doLoops is defined.