out := make([]Range, 0, len(in1)+len(in2))
	i, j := 0, 0
	for {
		var cur Range
		if i < len(in2) && j < len(in1) {
			if in2[i].Start < in1[j].Start {
				cur = in2[i]
				i++
			} else {
				cur = in1[j]
				j++
			}
		} else if i < len(in2) {
			cur = in2[i]
			i++
		} else if j < len(in1) {
			cur = in1[j]
			j++
		} else {
			break
		}

            return "  - ";
        }
    }

    private static class NumberedPrefixer implements Prefixer {
        private int cur = 0;

        @Override
        public String nextPrefix() {
            return "  " + ++cur + ". ";
        }
    }

// and what services it will be a member of, and enqueue the union of these.
// old and cur must be *v1.Pod types.
func (e *Controller) updatePod(old, cur interface{}) {
	services := endpointsliceutil.GetServicesToUpdateOnPodChange(e.serviceLister, old, cur)
	for key := range services {
		e.queue.AddAfter(key, e.endpointUpdatesBatchPeriod)
	}
}

      !foreach(case, !tail(cases),
               "$_self.cast<StringAttr>().getValue() == \"" # case # "\""),
      prev, cur, prev # " || " # cur)>,
  "string attribute whose value is " #
    !foldl(/*init*/!head(cases), /*list*/!tail(cases),
           prev, cur, prev # ", or " # cur)>;

// TODO: Use EnumAttr to define the common attribute cases

def TF_ConvnetDataFormatAttr : StringBasedAttr<

	if c.opts.SystemNamespace != "" {
		registerHandlers[*v1.Namespace](
			c,
			c.namespaces,
			"Namespaces",
			func(old *v1.Namespace, cur *v1.Namespace, event model.Event) error {
				if cur.Name == c.opts.SystemNamespace {
					return c.onSystemNamespaceEvent(old, cur, event)
				}
				return nil
			},
			nil,
		)
	}

	// Envoy can send two DiscoveryRequests with same version and nonce.
	// when it detects a new resource. We should respond if they change.
	prev := sets.New(previousResources...)
	cur := sets.New(request.ResourceNames...)
	removed := prev.Difference(cur)
	added := cur.Difference(prev)

	// We should always respond "alwaysRespond" marked requests to let Envoy finish warming
	// even though Nonce match and it looks like an ACK.

			result += ", " + r1.String() + r.a.String()
		} else if r.cnt > 2 {
			if (uint16(r.cnt) + ((uint16(r.r) - uint16(V0)) & 31)) > 32 {
				for i := 1; i < int(r.cnt); i++ {
					cur := V0 + Reg((uint16(r.r)-uint16(V0)+uint16(i))&31)
					result += ", " + cur.String() + r.a.String()
				}
			} else {
				r1 := V0 + Reg((uint16(r.r)-uint16(V0)+uint16(r.cnt)-1)&31)
				result += "-" + r1.String() + r.a.String()
			}
		}

	if job.DeletionTimestamp == nil && needsCleanup(job) {
		tc.enqueue(logger, job)
	}

}

func (tc *Controller) updateJob(logger klog.Logger, old, cur interface{}) {
	job := cur.(*batch.Job)
	logger.V(4).Info("Updating job", "job", klog.KObj(job))

	if job.DeletionTimestamp == nil && needsCleanup(job) {
		tc.enqueue(logger, job)
	}
}

	logger.V(4).Info("Add DB", "podDisruptionBudget", klog.KObj(pdb))
	dc.enqueuePdb(logger, pdb)
}

func (dc *DisruptionController) updateDB(logger klog.Logger, old, cur interface{}) {
	// TODO(mml) ignore updates where 'old' is equivalent to 'cur'.
	pdb := cur.(*policy.PodDisruptionBudget)
	logger.V(4).Info("Update DB", "podDisruptionBudget", klog.KObj(pdb))
	dc.enqueuePdb(logger, pdb)
}

// up. If the labels of the pod have changed we need to awaken both the old
// and new replica set. old and cur must be *v1.Pod types.
func (rsc *ReplicaSetController) updatePod(logger klog.Logger, old, cur interface{}) {
	curPod := cur.(*v1.Pod)
	oldPod := old.(*v1.Pod)
	if curPod.ResourceVersion == oldPod.ResourceVersion {
		// Periodic resync will send update events for all known pods.