/// <summary>
/// Creates a new instance of a DynamicPropertyReader
/// </summary>
/// <param name="sourceType">The assembly qualified name of the type against which the property should be invoked</param>
/// <param name="propertyName">The name of the property to be 'gotten' and evaluated against</param>
/// <exception cref="System.ArgumentNullException">Thrown if the sourceType or propertyName arguments are null or empty strings</exception>
/// <exception cref="System.TypeLoadException">Thrown if the sourceType is not a valid .NET type, or cannot be loaded</exception>
public DynamicPropertyReader(string sourceType, string propertyName)
{
if (string.IsNullOrEmpty(sourceType))
{
throw new ArgumentNullException("sourceType");
}
if (string.IsNullOrEmpty(propertyName))
{
throw new ArgumentNullException("propertyName");
}
// Attmpt to get the type, and throw a TypeLoadException if not found
Type type = Type.GetType(sourceType, true);
_fastPropertyGetter = new FastPropertyGetter(propertyName, type);
if (_fastPropertyGetter.PropertyType == typeof(string))
{
_comparator = StringComparator.Instance;
}
else if (typeof(IConvertible).IsAssignableFrom(_fastPropertyGetter.PropertyType) &&
typeof(IComparable).IsAssignableFrom(_fastPropertyGetter.PropertyType))
{
_comparator = NumericComparator.Instance;
}
else
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture,
Resources.DoesNotImplementRightInterfaces,
propertyName, sourceType));
}
}
public TreeMap(IComparator <K> comparator)
{
m_comparator = comparator;
m_root = null;
m_count = 0;
}
/// <summary>
/// Creates a new instance of a DynamicPropertyReader
/// </summary>
/// <param name="sourceType">The assembly qualified name of the type against which the property should be invoked</param>
/// <param name="propertyName">The name of the property to be 'gotten' and evaluated against</param>
/// <exception cref="System.ArgumentNullException">Thrown if the sourceType or propertyName arguments are null or empty strings</exception>
/// <exception cref="System.TypeLoadException">Thrown if the sourceType is not a valid .NET type, or cannot be loaded</exception>
public DynamicPropertyReader(string sourceType, string propertyName)
{
if (string.IsNullOrEmpty(sourceType))
throw new ArgumentNullException("sourceType");
if (string.IsNullOrEmpty(propertyName))
throw new ArgumentNullException("propertyName");
// Attmpt to get the type, and throw a TypeLoadException if not found
Type type = Type.GetType(sourceType, true);
_fastPropertyGetter = new FastPropertyGetter(propertyName, type);
if (_fastPropertyGetter.PropertyType == typeof (string))
{
_comparator = StringComparator.Instance;
}
else if (typeof (IConvertible).IsAssignableFrom(_fastPropertyGetter.PropertyType) &&
typeof (IComparable).IsAssignableFrom(_fastPropertyGetter.PropertyType))
{
_comparator = NumericComparator.Instance;
}
else
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture,
Resources.DoesNotImplementRightInterfaces,
propertyName, sourceType));
}
}
/// <summary>Return the items of an Iterable as a sorted list.</summary>
/// <?/>
/// <param name="items">The collection to be sorted.</param>
/// <returns>A list containing the same items as the Iterable, but sorted.</returns>
public static IList <T> Sorted <T>(IEnumerable <T> items, IComparator <T> comparator)
{
IList <T> result = ToList(items);
result.Sort(comparator);
return(result);
}
/**
* Appends to the <code>builder</code> the deep comparison of
* two <code>Object</code> arrays.
*
* <ol>
* <li>Check if arrays are the same using <code>==</code></li>
* <li>Check if for <code>null</code>, <code>null</code> is less than non-<code>null</code></li>
* <li>Check array length, a short length array is less than a long length array</li>
* <li>Check array contents element by element using {@link #Append(Object, Object, IComparator)}</li>
* </ol>
*
* This method will also will be called for the top level of multi-dimensional,
* ragged, and multi-typed arrays.
*
* @param lhs left-hand array
* @param rhs right-hand array
* @param comparator <code>IComparator</code> to use to compare the array elements,
* <code>null</code> means to treat <code>lhs</code> elements as <code>Comparable</code>.
* @return this - used to chain append calls
* @throws ClassCastException if <code>rhs</code> is not assignment-compatible
* with <code>lhs</code>
* @since 2.0
*/
public CompareToBuilder Append(Object[] lhs, Object[] rhs, IComparator comparator)
{
if (comparison != 0)
{
return(this);
}
if (lhs == rhs)
{
return(this);
}
if (lhs == null)
{
comparison = -1;
return(this);
}
if (rhs == null)
{
comparison = +1;
return(this);
}
if (lhs.Length != rhs.Length)
{
comparison = (lhs.Length < rhs.Length) ? -1 : +1;
return(this);
}
for (int i = 0; i < lhs.Length && comparison == 0; i++)
{
Append(lhs[i], rhs[i], comparator);
}
return(this);
}
public virtual void TestGroup()
{
string[] input = new string[] { "0 ab", "0 bb", "0 cc", "1 dd", "2 dd", "2 kj", "3 kj", "3 kk" };
int[] counts = new int[] { 3, 1, 2, 2 };
IComparator <string> fieldOne = IComparer.Comparing(null);
int index = 0;
int group = 0;
foreach (IEnumerable <string> set in Iterables.Group(Arrays.AsList(input), fieldOne))
{
string sharedKey = null;
int thisCount = 0;
foreach (string line in set)
{
string thisKey = line.Split(" ")[0];
if (sharedKey == null)
{
sharedKey = thisKey;
}
else
{
NUnit.Framework.Assert.AreEqual(sharedKey, thisKey, "Wrong key");
}
NUnit.Framework.Assert.AreEqual(line, input[index++], "Wrong input line");
thisCount++;
}
NUnit.Framework.Assert.AreEqual(counts[group++], thisCount, "Wrong number of items in this iterator");
}
NUnit.Framework.Assert.AreEqual(input.Length, index, "Didn't get all inputs");
NUnit.Framework.Assert.AreEqual(counts.Length, group, "Wrong number of groups");
}
/// <summary>
/// search on searchable using DFS algorithm
/// </summary>
/// <param name="searchable">obj that can be searched on</param>
/// <param name="comparator">irrelevant</param>
/// <returns>the solution of the DFS algorithm:
/// path to the goal and the number of state that evaluated</returns>
public override Solution <T> Search(ISearchable <T> searchable, IComparator <T> comparator = null)
{
HashSet <T> labeled = new HashSet <T>();
State <T> state = searchable.GetInitializeState();
state.Cost = 1;
state.CameFrom = null;
AddToOpenList(state);
while (OpenListSize > 0)
{
state = PopOpenList();
if (state.Equals(searchable.GetGoalState()))
{
return(BackTrace(ref state));
}
if (!labeled.Contains(state.Getstate()))
{
labeled.Add(state.Getstate());
List <State <T> > succerssors = searchable.GetAllPossibleStates(state);
foreach (State <T> s in succerssors)
{
if (!labeled.Contains(s.Getstate()))
{
s.Cost = state.Cost + 1;
s.CameFrom = state;
AddToOpenList(s);
}
}
}
}
return(null);
}
public IIterator CreateIterator(IComparator comparator)
{
if (RestartsCount == 0)
return new EmptyIterator();
IncrementUsage(); // make sure that this object won't be disposed before its iterator
return new BlockIterator(comparator, this);
}
public Detected(GameObject detected, string detectedName, GameObject agent, IComparator comparator)
{
this.detected = detected;
this.agent = agent;
this.detectedName = detectedName;
this.comparator = comparator;
status = true;
}
public IComparator <TEvaluatedFeatureVector, TTemplate, TTemplatedFeatureVector> getComparator()
{
if (this.comparator == null)
{
this.comparator = this.createComparator();
}
return(comparator);
}
public Property(String name, IComparator comparator, double low, double high)
{
Name = name;
Comparator = comparator;
LowProbability = low;
HighProbability = high;
IsAnalyzed = comparator.IsTokenized();
IsIdProperty = false;
}
public virtual void TestArrayComparator()
{
IComparator <bool[]> ac = Comparators.GetArrayComparator();
NUnit.Framework.Assert.IsTrue(ac.Compare(new bool[] { true, false, true }, new bool[] { true, false, true }) == 0);
NUnit.Framework.Assert.IsTrue(ac.Compare(new bool[] { true, false, true }, new bool[] { true, false }) > 0);
NUnit.Framework.Assert.IsTrue(ac.Compare(new bool[] { true, false, true }, new bool[] { true, false, true, false }) < 0);
NUnit.Framework.Assert.IsTrue(ac.Compare(new bool[] { false, false, true }, new bool[] { true, false, true }) < 0);
}
public int CompareTo(Slice other, IComparator comparator = null)
{
if (comparator == null)
{
comparator = ByteWiseComparator.Default;
}
return comparator.Compare(this, other);
}
public void SortChildren(IComparator <IEntity> compare)
{
if (children == null)
{
return;
}
ZIndexSorter.Instance().Sort(children, compare);
}
public DefaultFilterField(
IComparator comparator,
string value,
string fieldName)
{
Comparator = comparator;
Value = value;
FieldName = fieldName;
}
public Property(String name, IComparator comparator, double low, double high)
{
Name = name;
Comparator = comparator;
LowProbability = low;
HighProbability = high;
IsAnalyzed = comparator.IsTokenized();
IsIdProperty = false;
}
public virtual void TestNullSafeComparator()
{
IComparator <int> comp = Comparators.NullSafeNaturalComparator();
NUnit.Framework.Assert.AreEqual(0, comp.Compare(null, null));
NUnit.Framework.Assert.AreEqual(-1, comp.Compare(null, int.Parse(42)));
NUnit.Framework.Assert.AreEqual(1, comp.Compare(int.Parse(42), null));
NUnit.Framework.Assert.AreEqual(-1, comp.Compare(11, 18));
NUnit.Framework.Assert.AreEqual(0, comp.Compare(11, 11));
}
public MergingIterator(IComparator comparator, IList<IIterator> children)
{
if (children == null)
throw new ArgumentNullException("children");
this.comparator = comparator;
this.children = children;
direction = Direction.Forward;
current = null;
}
public void EnsureComparator(IComparator comparator)
{
var a = AdditionalComparators.ToList();
if (!a.Any(x => comparator.Value.Equals(x.Value, StringComparison.OrdinalIgnoreCase)))
{
a.Add(comparator);
}
AdditionalComparators = a;
}
public virtual void TestMerge3()
{
IList <string> a = Arrays.AsList("a", "b", "d", "e");
IList <string> b = Arrays.AsList("b", "c", "d", "e");
IList <string> c = Arrays.AsList("a", "b", "c", "e", "f");
IComparator <string> comparator = IComparer.NaturalOrder();
IEnumerator <Triple <string, string, string> > iter = Iterables.Merge(a, b, c, comparator).GetEnumerator();
NUnit.Framework.Assert.AreEqual(iter.Current, new Triple <string, string, string>("b", "b", "b"));
NUnit.Framework.Assert.AreEqual(iter.Current, new Triple <string, string, string>("e", "e", "e"));
NUnit.Framework.Assert.IsTrue(!iter.MoveNext());
}
public virtual void TestListComparator()
{
IComparator <IList <string> > lc = Comparators.GetListComparator();
string[] one = new string[] { "hello", "foo" };
string[] two = new string[] { "hi", "foo" };
string[] three = new string[] { "hi", "foo", "bar" };
NUnit.Framework.Assert.IsTrue(lc.Compare(Arrays.AsList(one), Arrays.AsList(one)) == 0);
NUnit.Framework.Assert.IsTrue(lc.Compare(Arrays.AsList(one), Arrays.AsList(two)) < 0);
NUnit.Framework.Assert.IsTrue(lc.Compare(Arrays.AsList(one), Arrays.AsList(three)) < 0);
NUnit.Framework.Assert.IsTrue(lc.Compare(Arrays.AsList(three), Arrays.AsList(two)) > 0);
}
public BlockBuilder(Stream stream, StorageState storageState, IComparator comparator, int blockRestartInterval)
{
_storageState = storageState;
if (blockRestartInterval < 1)
throw new InvalidOperationException("BlockRestartInternal must be >= 1");
_stream = new CrcStream(stream);
IsEmpty = true;
OriginalPosition = stream.Position;
_comparator = comparator;
_blockRestartInterval = blockRestartInterval;
_lastKeyBuffer = storageState.Options.BufferPool.Take(storageState.Options.MaximumExpectedKeySize);
}
public BackupAction(string name, string source, string destination, IBackup bmode, IComparator comparator,
int copies = 1, bool archive = false, string pass = "")
{
ActionName = name;
SourcePath = source;
DestinationPath = destination;
FilesToCopy = RecursiveFileFinder.ProcessPath(source, true);
BackupProcessor = bmode;
Comparator = comparator;
BackupCopies = copies;
Archive = archive;
ArchivePassword = pass;
}
public DynamicTreeSplitting(
IEvaluator <TState, TMetric> evaluator,
IBrancher <TNode, TState, TMetric> brancher,
IComparator <TMetric> comparator,
IStateTransitions <TState, TNode, TMetric> stateTransitions
)
{
_evaluator = evaluator;
_brancher = brancher;
_comparator = comparator;
_stateTransitions = stateTransitions;
_manualResetEvent = new ManualResetEvent(false);
}
public static AnyType findMax <AnyType>(AnyType[] a, IComparator <AnyType> cmp)
{
int maxIndex = 0;
for (int i = 1; i < a.Length; i++)
{
if (cmp.Compare(a[i], a[maxIndex]) > 0)
{
maxIndex = i;
}
}
return(a[maxIndex]);
}
void Start()
{
HumanStrategy h1 = new HumanStrategy("Yamada", 170, 60, 20);
HumanStrategy h2 = new HumanStrategy("Sato", 175, 55, 20);
comparator = new AgeComparator();
resultAge = Compare(h1, h2);
comparator = new HeightComparator();
resultHeight = Compare(h1, h2);
print("age :" + resultAge);
print("height :" + resultHeight);
}
void Start()
{
Human h1 = new Human("aaa", 170, 60, 20);
Human h2 = new Human("bbb", 175, 55, 20);
_comparator = new AgeComparator();
resultage = compare(h1, h2);
_comparator = new HeightComparator();
resultheight = compare(h1, h2);
print("age :" + resultage);
print("height :" + resultheight);
}
public virtual void TestComparators()
{
c.Clear();
c.SetCount("b", 3.0);
c.SetCount("p", -5.0);
c.SetCount("a", 2.0);
c.SetCount("s", 4.0);
IList <string> list = new List <string>(c.KeySet());
IComparator <string> cmp = Counters.ToComparator(c);
list.Sort(cmp);
NUnit.Framework.Assert.AreEqual(4, list.Count);
NUnit.Framework.Assert.AreEqual("p", list[0]);
NUnit.Framework.Assert.AreEqual("a", list[1]);
NUnit.Framework.Assert.AreEqual("b", list[2]);
NUnit.Framework.Assert.AreEqual("s", list[3]);
IComparator <string> cmp2 = Counters.ToComparatorDescending(c);
list.Sort(cmp2);
NUnit.Framework.Assert.AreEqual(4, list.Count);
NUnit.Framework.Assert.AreEqual("p", list[3]);
NUnit.Framework.Assert.AreEqual("a", list[2]);
NUnit.Framework.Assert.AreEqual("b", list[1]);
NUnit.Framework.Assert.AreEqual("s", list[0]);
IComparator <string> cmp3 = Counters.ToComparator(c, true, true);
list.Sort(cmp3);
NUnit.Framework.Assert.AreEqual(4, list.Count);
NUnit.Framework.Assert.AreEqual("p", list[3]);
NUnit.Framework.Assert.AreEqual("a", list[0]);
NUnit.Framework.Assert.AreEqual("b", list[1]);
NUnit.Framework.Assert.AreEqual("s", list[2]);
IComparator <string> cmp4 = Counters.ToComparator(c, false, true);
list.Sort(cmp4);
NUnit.Framework.Assert.AreEqual(4, list.Count);
NUnit.Framework.Assert.AreEqual("p", list[0]);
NUnit.Framework.Assert.AreEqual("a", list[3]);
NUnit.Framework.Assert.AreEqual("b", list[2]);
NUnit.Framework.Assert.AreEqual("s", list[1]);
IComparator <string> cmp5 = Counters.ToComparator(c, false, false);
list.Sort(cmp5);
NUnit.Framework.Assert.AreEqual(4, list.Count);
NUnit.Framework.Assert.AreEqual("p", list[3]);
NUnit.Framework.Assert.AreEqual("a", list[2]);
NUnit.Framework.Assert.AreEqual("b", list[1]);
NUnit.Framework.Assert.AreEqual("s", list[0]);
}
public static int Search(T[] collection, T key, IComparator <T> comparator)
{
if (collection == null)
{
throw new ArgumentNullException(nameof(collection));
}
if (collection.Length == 0)
{
throw new ArgumentException(nameof(collection));
}
int min = 0;
int max = collection.Length - 1;
while (min <= max)
{
int mid = (min + max) / 2;
int comperedValue = 0;
if (comparator != null)
{
comperedValue = comparator.Compare(key, collection[mid]);
}
else
{
var enumerable = key as IComparable <T>;
if (enumerable != null)
{
comperedValue = enumerable.CompareTo(collection[mid]);
}
else
{
throw new InvalidOperationException();
}
}
if (comperedValue == 0)
{
return(mid);
}
if (comperedValue < 0)
{
max = mid - 1;
}
else
{
min = mid + 1;
}
}
return(-1);
}
/// <summary>Finds and returns the key in this Counter with the smallest count.</summary>
/// <remarks>
/// Finds and returns the key in this Counter with the smallest count.
/// Ties are broken by comparing the objects using the given tie breaking
/// Comparator, favoring Objects that are sorted to the front. This is useful
/// if the keys are numeric and there is a bias to prefer smaller or larger
/// values, and can be useful in other circumstances where random tie-breaking
/// is not desirable. Returns null if this Counter is empty.
/// </remarks>
public virtual E Argmin(IComparator <E> tieBreaker)
{
int min = int.MaxValue;
E argmin = null;
foreach (E key in map.Keys)
{
int count = GetIntCount(key);
if (argmin == null || count < min || (count == min && tieBreaker.Compare(key, argmin) < 0))
{
min = count;
argmin = key;
}
}
return(argmin);
}
public SerialAlfaBetaSearch(
IEvaluator <TState, TMetric> evaluator,
IBrancher <TNode, TState, TMetric> brancher,
IComparator <TMetric> comparator,
IStateTransitions <TState, TNode, TMetric> stateTransitions,
TMetric maxValue,
TMetric minValue
)
{
_evaluator = evaluator;
_brancher = brancher;
_comparator = comparator;
_stateTransitions = stateTransitions;
_minValue = minValue;
_maxValue = maxValue;
}
/// <summary>Finds and returns the key in this Counter with the largest count.</summary>
/// <remarks>
/// Finds and returns the key in this Counter with the largest count.
/// Ties are broken by comparing the objects using the given tie breaking
/// Comparator, favoring Objects that are sorted to the front. This is useful
/// if the keys are numeric and there is a bias to prefer smaller or larger
/// values, and can be useful in other circumstances where random tie-breaking
/// is not desirable. Returns null if this Counter is empty.
/// </remarks>
public virtual E Argmax(IComparator <E> tieBreaker)
{
int max = int.MinValue;
E argmax = null;
foreach (E key in KeySet())
{
int count = GetIntCount(key);
if (argmax == null || count > max || (count == max && tieBreaker.Compare(key, argmax) < 0))
{
max = count;
argmax = key;
}
}
return(argmax);
}
/// <summary> Sorts its argument (destructively) using insert sort; in the context of this package
/// insertion sort is simple and efficient given its relatively small inputs.
///
/// </summary>
/// <param name="vector">vector to sort
/// </param>
/// <param name="comparator">comparator to define sort ordering
/// </param>
public static void InsertionSort(ArrayList vector, IComparator comparator)
{
int max = vector.Count;
for (int i = 1; i < max; i++)
{
object value_Renamed = vector[i];
int j = i - 1;
object valueB;
while (j >= 0 && comparator.Compare(valueB = vector[j], value_Renamed) > 0)
{
vector[j + 1] = valueB;
j--;
}
vector[j + 1] = value_Renamed;
}
}
public static void Sort <T>(T[] arr, IComparator <T> comparator)
{
T temp = default(T);
for (int iteration = 0; iteration < arr.Length; iteration++)
{
for (int index = 0; index < arr.Length - 1; index++)
{
if (comparator.Compare(arr[index], arr[index + 1]) > 0)
{
temp = arr[index + 1];
arr[index + 1] = arr[index];
arr[index] = temp;
}
}
}
}
public override void Sort(List <T> list, int start, int end, IComparator <T> comparator)
{
for (int i = start + 1; i < end; i++)
{
T current = list[i];
T prev = list[i - 1];
if (comparator.Compare(current, prev) < 0)
{
int j = i;
do
{
list[j--] = prev;
} while (j > start && comparator.Compare(current, prev = list[j - 1]) < 0);
}
}
}
public SingleColumnValueFilter(
byte[] columnFamily,
byte[] columnQualifier,
CompareType compareOp,
IComparator comparatorObj,
bool filterIfMissing,
bool latestVersionOnly
)
{
ColumnFamily = columnFamily;
ColumnQualifier = columnQualifier;
CompareOp = compareOp;
ComparatorObj = comparatorObj;
FilterIfMissing = filterIfMissing;
LatestVersionOnly = latestVersionOnly;
Name = ConstString.FilterPath + nameof(SingleColumnValueFilter);
}
/// <summary>
/// Contructs a new instance of the FastPropertyReader
/// </summary>
/// <param name="wrappedPropertyReader">The <see cref="PropertyReader"/> to be wrapped</param>
/// <param name="propertyName">The name of the property to be retrieved from the result</param>
public FastPropertyReader(PropertyReader wrappedPropertyReader, string propertyName)
{
_fastPropertyGetter = new FastPropertyGetter(propertyName, wrappedPropertyReader.PropertyType);
_wrappedPropertyReader = wrappedPropertyReader;
if (_fastPropertyGetter.PropertyType == typeof(string))
{
_comparator = StringComparator.Instance;
}
else if (typeof(IConvertible).IsAssignableFrom(_fastPropertyGetter.PropertyType) &&
typeof(IComparable).IsAssignableFrom(_fastPropertyGetter.PropertyType))
{
_comparator = NumericComparator.Instance;
}
else
{
_comparator = ObjectComparator.Instance;
}
}
public DiceCoefficientComparator()
{
_subcomp = new ExactComparator();
}
public BlockIterator(IComparator comparator, Block parent)
{
_comparator = comparator;
_parent = parent;
_keyBuffer = _parent._storageOptions.BufferPool.Take(_parent._storageOptions.MaximumExpectedKeySize);
}
private bool BeforeFile(IComparator comparator, Slice key, FileMetadata file)
{
// Empty 'key' occurs after all keys and is therefore never before 'file'
return (key.IsEmpty() == false && comparator.Compare(key, file.SmallestKey.UserKey) < 0);
}
private bool AfterFile(IComparator comparator, Slice key, FileMetadata file)
{
// Empty 'key' occurs before all keys and is therefore never after 'file'
return (key.IsEmpty() == false && comparator.Compare(key, file.LargestKey.UserKey) > 0);
}
public ItemState Get(InternalKey key, ulong fileNumber, long fileSize, ReadOptions readOptions, IComparator comparator,
out Stream stream)
{
Table table = FindTable(fileNumber, fileSize);
Tuple<Slice, Stream> result = table.InternalGet(readOptions, key);
stream = null;
if (result == null)
{
return ItemState.NotFound;
}
bool shouldDispose = true;
try
{
InternalKey internalKey;
if (!InternalKey.TryParse(result.Item1, out internalKey))
{
return ItemState.Corrupt;
}
if (comparator.Compare(internalKey.UserKey, key.UserKey) == 0)
{
bool isFound = internalKey.Type == ItemType.Value;
if (!isFound)
{
return ItemState.Deleted;
}
stream = result.Item2;
shouldDispose = false;
return ItemState.Found;
}
return ItemState.NotFound;
}
finally
{
if (shouldDispose && result.Item2 != null)
result.Item2.Dispose();
}
}
public JaccardIndexComparator()
{
_subcomp = new ExactComparator();
}
public ProcessedVideoBuilder(IVideoAdjuster videoAdjuster, IAudioAdjuster audioAdjuster, IComparator comparator)
{
_videoAdjuster = videoAdjuster;
_audioAdjuster = audioAdjuster;
_comparator = comparator;
}
public void SetComparator(IComparator comp)
{
_subcomp = comp;
}
public void Sort(IComparator<IEntity> comparator)
{
ZIndexSorter.Instance().Sort(children, comparator);
}
