System.Func.Invoke(T)

public static IReadOnlyList<TRes> Combine<T,TRes>(T arg, IReadOnlyList<T> rest, Func<T, TRes> mapper)
        {
            if (rest.Count < 1)
            {
                return new[] { mapper(arg) };
            }
            var result = new TRes[rest.Count + 1];
            result[0] = mapper(arg);

            for (int i = 0; i < rest.Count; i++)
            {
                result[i + 1] = mapper(rest[i]);
            }

            return result;
        }

public static IReadOnlyList<TRes> Combine<TRes,T>(IReadOnlyList<TRes> arg1, T arg2, T[] rest, Func<T, TRes> mapper)
        {
            if (arg1.Count < 1)
            {
                return Combine(arg2, rest, mapper);
            }

            var result = new TRes[arg1.Count +1 +rest.Length];
            for (int i = 0; i < arg1.Count; i++)
            {
                result[i] = arg1[i];
            }

            result[arg1.Count] = mapper(arg2);

            for (int i = 0; i < rest.Length; i++)
            {
                result[arg1.Count + 1+ i] = mapper(rest[i]);
            }
            return result;
        }

public static IReadOnlyList<TRes> SelectToReadOnlyList<T, TRes>(this IReadOnlyList<T> source, Func<T, TRes> mapper)
        {
            source.replacedertNotNull($"\"{nameof(source)}\" cannot be null");
            mapper.replacedertNotNull($"\"{nameof(mapper)}\" cannot be null");

            TRes[] result = new TRes[source.Count];
            for (int i = 0; i < source.Count; i++)
            {
                result[i] = mapper(source[i]);
            }
            return result;
        }

public static IReadOnlyList<TRes> SelectToReadOnlyList<T, TRes>(this IReadOnlyList<T> source, Predicate<T> predicate, Func<T, TRes> mapper)
        {
            source.replacedertNotNull($"\"{nameof(source)}\" cannot be null");
            mapper.replacedertNotNull($"\"{nameof(mapper)}\" cannot be null");
            predicate.replacedertNotNull($"\"{nameof(predicate)}\" cannot be null");

            int count = 0;

            for (int i = 0; i < source.Count; i++)
            {
                if (predicate(source[i]))
                {
                    count++;
                }
            }

            TRes[] result = new TRes[count];
            if (count > 0)
            {
                int resultIndex = 0;
                for (int i = 0; i < source.Count; i++)
                {
                    if (predicate(source[i]))
                    {
                        if (resultIndex >= result.Length)
                        {
                            throw new SqExpressException("The predicate function should be idempotent",
                                new IndexOutOfRangeException());
                        }

                        result[resultIndex] = mapper(source[i]);
                        resultIndex++;
                    }
                }

                if (resultIndex != result.Length)
                {
                    throw new SqExpressException("The predicate function should be idempotent");
                }
            }
            return result;
        }

public static Il2CppReferenceArray<T> Remove<T>(this Il2CppReferenceArray<T> reference, Func<T, bool> predicate) where T : Model {
            List<T> bases = new List<T>();
            foreach (var tmp in reference)
                if (!predicate(tmp))
                    bases.Add(tmp);

            return new(bases.ToArray());
        }

public static Il2CppSystem.Collections.Generic.IEnumerable<C> SelectI<T, R, C>(this IEnumerable<T> enumerable, Func<T, R> predicate) where R : Model where C : Model {
            var bases = new Il2CppSystem.Collections.Generic.List<C>();
            var enumerator = enumerable.GetEnumerator();
            while (enumerator.MoveNext())
                bases.Add(predicate(enumerator.Current).Cast<C>());
            return bases.Cast<Il2CppSystem.Collections.Generic.IEnumerable<C>>();
        }

public async void Execute(object parameter)
        {
            await _asyncExecute((T)parameter);
        }

public static Il2CppReferenceArray<T> Remove<T>(this Il2CppReferenceArray<T> reference, Func<T, bool> predicate) where T : Il2CppObjectBase {
            List<T> bases = new List<T>();
            foreach (var tmp in reference)
                if (!predicate(tmp))
                    bases.Add(tmp);

            return new(bases.ToArray());
        }

private string ResolveIfNode<T>(IfNode node, T parameter)
        {
            if (node.Delegate == null)
            {
                lock (this)
                {
                    var context = new ExpressionActivator();
                    var result = context.Create<T>(node.Test);
                    node.Delegate = result.Func;
                }
            }
            var func = node.Delegate as Func<T, bool>;
            if (func(parameter))
            {
                return ResolveTextNode(new TextNode { Value = node.Value });
            }
            return string.Empty;
        }

public static void Throws<T>(Action testCode, Func<T, bool> ex) where T : Exception
        {
            try
            {
                testCode();
            }
            catch (T t)
            {
                if (ex(t) == false)
                    throw new Exception("Different exception information", t);
                return;
            }
            catch
            {
                throw;
            }
            throw new Exception("No exception");
        }

public async Task<T> TryGetFromCache<T>(
            string key, 
            Func<Task<T>> renewObjectFunc,
            Func<T, Task<bool>> isCachedObjectValidFunc)
        {
            if (_cacheDictionary.TryGetValue(key, out var cachedObj))
            {
                var obj = (T) cachedObj;

                if (await isCachedObjectValidFunc(obj))
                {
                    return obj;
                }
            }

            var newObj = await renewObjectFunc();

            await CacheObject(newObj, key);

            return newObj;

        }

public static Dictionary<string, string> Serialize(T obj)
        {
            if (typeof(ISerializable).IsreplacedignableFrom(typeof(T)))
                return _serializer.Value(obj);
            else
                return _propertySerializer.Value(obj);
        }

public static IEnumerable<T> TakeUntilIncluding<T>(this IEnumerable<T> list, Func<T, bool> predicate)
    {
        foreach (T el in list)
        {
            yield return el;
            if (predicate(el))
                yield break;
        }
    }

public Maybe<TResult> Select<TResult>(Func<T, TResult> selector)
        {
            if (selector == null)
                throw new ArgumentNullException(nameof(selector));
 
            if (this.HasItem)
                return new Maybe<TResult>(selector(this.Item));
            else
                return new Maybe<TResult>();
        }

public Maybe<TResult> Select<TResult>(Func<T, TResult> selector)
        {
            if (selector == null)
                throw new ArgumentNullException(nameof(selector));

            if (this.HasItem)
                return new Maybe<TResult>(selector(this.Item));
            else
                return new Maybe<TResult>();
        }

internal static U[] Select<T, U>(this IReadOnlyList<T> list, Func<T, U> selector)
        {
            U[] result = new U[list.Count];

            for (int i = 0; i < result.Length; i++)
            {
                result[i] = selector(list[i]);
            }

            return result;
        }

public static bool IsContains<T>(this List<T> list, Func<T, bool> func)
        {
            for(var i = 0; i < list.Count; i++)
            {
                if(func(list[i]) == true)
                {
                    return true;
                }
            }

            return false;
        }

public virtual void Drow()
        {
            if (DataSource == null) return;
            if (LineHeight == 0) LineHeight = TextHeight;

            ScrollPosition = GUI.BeginScrollView(
                Area
                , ScrollPosition
                , new Rect(0, 0, Area.width - WidthScrollLine, DataSource.Count * LineHeight));
            
            var rect = new Rect(0, 0, Area.width - WidthScrollLine, LineHeight);
            for (int i = 0; i < DataSource.Count; i++)
            {
                //светлый фон каждой второй строки
                if (OddLineHighlight && i % 2 == 1)
                {
                    Widgets.DrawAltRect(rect);
                }

                //отрисовка строки
                DrowLine(i, DataSource[i], rect);

                //выделенная строка
                if (ShowSelected && i == SelectedIndex)
                {
                    Widgets.DrawHighlightSelected(rect);
                    //Widgets.DrawHighlight(rect);
                }
                //подсветка строки под курсором
                if (!OddLineHighlight && Mouse.IsOver(rect))
                {
                    Widgets.DrawHighlight(rect);
                }
                //всплывающая подсказка
                if (Tooltip != null)
                {
                    var tt = Tooltip(DataSource[i]);
                    if (!string.IsNullOrEmpty(tt))
                    {
                        TooltipHandler.TipRegion(rect, tt);
                    }
                }

                //событие нажатия на строку
                if (Widgets.ButtonInvisible(rect))
                {
                    SelectedIndex = i;
                    if (OnClick != null) OnClick(i, DataSource[i]);
                }
                rect.y += LineHeight;
            }

            GUI.EndScrollView();
        }

public Slice EncodeKey(T value)
			{
				return m_encoder(value);
			}

public Slice EncodeValue(T value)
			{
				return m_encoder(value);
			}

public void TransformRange(int index, int length, Func<T, T> converter)
		{
			if (root == null)
				return;
			int endIndex = index + length;
			int pos = index;
			while (pos < endIndex) {
				int endPos = Math.Min(endIndex, GetEndOfRun(pos));
				T oldValue = this[pos];
				T newValue = converter(oldValue);
				SetRange(pos, endPos - pos, newValue);
				pos = endPos;
			}
		}

public void Transform(Func<T, T> converter)
		{
			if (root == null)
				return;
			Node prevNode = null;
			for (Node n = root.LeftMost; n != null; n = n.Successor) {
				n.value = converter(n.value);
				if (prevNode != null && comparisonFunc(prevNode.value, n.value)) {
					n.count += prevNode.count;
					UpdateAugmentedData(n);
					RemoveNode(prevNode);
				}
				prevNode = n;
			}
			CheckProperties();
		}

public static async Task<R> Then<T, R>(this Task<T> task, [NotNull] Func<T, R> inlineContinuation)
		{
			// Note: we use 'await' instead of ContinueWith, so that we can give the caller a nicer callstack in case of errors (instead of an AggregateExecption)

			var value = await task.ConfigureAwait(false);
			return inlineContinuation(value);
		}

public R Convert(T value)
			{
				return this.Converter(value);
			}

public object ConvertBoxed(object value)
			{
				return (object)this.Converter(Idenreplacedy<T>.FromObject(value));
			}

public bool Equals(T x, T y) {
            return _selector(x).Equals(_selector(y));
        }

public int GetHashCode(T obj) {
            return _selector(obj).GetHashCode();
        }

public static IEnumerable<double> MovingAverage<T>(this IEnumerable<T> inputStream, Func<T, double> selector, int period)
        {
            var ma = new MovingAverage(period);
            foreach (var item in inputStream)
            {
                ma.Push(selector(item));
                yield return ma.Current;
            }
        }

public virtual async Task<bool> RefreshAsync()
        {
            if (_isRefreshing) return false;
            _isRefreshing = true;

            if (ChildrenProvider == null) return AbortRefresh();
            var enumerable = await ChildrenProvider(Content);
            if (enumerable == null) return AbortRefresh();

            var collection = enumerable.ToList();
            if (!collection.Any()) return AbortRefresh();

            var children = collection.Select(GenerateLazyTreeNode).ToList();
            children.ForEach(item => item.Parent = this);

            SetChildrenCache(children.AsReadOnly());

            _isRefreshing = false;
            return true;
        }

public bool CanExecute(T parameter) => _canExecute?.Invoke(parameter) ?? true;

public async Task Execute(T parameter)
        {
            IsExecuting = true;
            var invoke = _execute?.Invoke(parameter);
            if (invoke != null) await invoke;
            IsExecuting = false;
        }

public IDownloaderBuilder Configure<T>(Func<T, IRemotePathProvider> remotePathProviderInterceptor) where T : IRemotePathProvider
        {
            Guards.ThrowIfNull(remotePathProviderInterceptor);

            _remotePathProviderInterceptor = _remotePathProviderInterceptor
                .Then(item => remotePathProviderInterceptor((T)item));
            return this;
        }

public static void AddMultiple<T>(this IList<KeyValuePair<String, String>> collection, String key, IEnumerable<T> values, Func<T, String> convert)
        {
            ArgumentUtility.CheckForNull(collection, "collection");
            ArgumentUtility.CheckStringForNullOrEmpty(key, "name");

            if (convert == null) convert = (val) => val.ToString();

            if (values != null && values.Any())
            {
                StringBuilder newValue = new StringBuilder();
                KeyValuePair<String, String> matchingKvp = collection.FirstOrDefault(kvp => kvp.Key.Equals(key));
                if (matchingKvp.Key == key)
                {
                    collection.Remove(matchingKvp);
                    newValue.Append(matchingKvp.Value);
                }

                foreach (var value in values)
                {
                    if (newValue.Length > 0)
                    {
                        newValue.Append(",");
                    }
                    newValue.Append(convert(value));
                }

                collection.Add(new KeyValuePair<String, String>(key, newValue.ToString()));
            }
        }

public static void AddMultiple<T>(this NameValueCollection collection, String name, IEnumerable<T> values, Func<T, String> convert)
        {
            ArgumentUtility.CheckForNull(collection, "collection");
            ArgumentUtility.CheckStringForNullOrEmpty(name, "name");

            if (convert == null) convert = (val) => val.ToString();

            if (values != null)
            {
                foreach (var value in values)
                {
                    collection.Add(name, convert(value));
                }
            }
        }

public static T? FirstOrNullable<T>(this IEnumerable<T> source, Func<T, bool> predicate)
		where T : struct
		{
			source.ThrowOnNull(nameof(source));
			return source.Cast<T?>().FirstOrDefault(v => predicate(v.Value));
		}

public void RpcServer<T>(string key, Func<T, Task<RpcResult>> handler)
        {
            if (string.IsNullOrWhiteSpace(key))
                throw new ArgumentNullException(nameof(key));

            if (handler == null)
                throw new ArgumentNullException(nameof(handler));

            _logger.LogWarning($"{DateTime.Now} RabbitMQ RpcServer 启动 " +
                               $"[{key}] " +
                               $"......");

            var channel = _rabbitMqClientProvider.Channel;

            channel.QueueDeclare(queue: _config.GetRpcServerQueueKey(key), durable: false, exclusive: false, autoDelete: true, arguments: null);

            //channel.BasicQos(0, 1, false);

            var consumer = new EventingBasicConsumer(channel);
            channel.BasicConsume(queue: _config.GetRpcServerQueueKey(key), autoAck: false, consumer: consumer);
            consumer.Received += async (model, ea) =>
            {
                var props = ea.BasicProperties;
                var replyProps = channel.CreateBasicProperties();
                replyProps.CorrelationId = props.CorrelationId;
                RpcResult response = null;

                try
                {
                    _logger.LogDebug($"{DateTime.Now}：RpcServer [{key}] 收到消息： {Encoding.Default.GetString(ea.Body.ToArray())}");
                    
                    response = await handler.Invoke(_serializerProvider.Deserialize<T>(ea.Body.ToArray()));
                }
                catch (Exception e)
                {
                    _logger.LogError(e, $"{DateTime.Now} RabbitMQ RpcServer [{key}] 执行异常 {e.Message} ");
                    
                    response = new RpcResult($"RpcServer [{key}] 执行异常", e);
                }
                finally
                {
                    channel.BasicPublish(exchange: "", routingKey: props.ReplyTo, basicProperties: replyProps, body: _serializerProvider.SerializeBytes(response));
                    channel.BasicAck(ea.DeliveryTag, false);
                }
            };
        }

public bool TryConstrainValue(object inputValue, out object outputValue)
            {
                if (CanAcceptValue(inputValue))
                {
                    outputValue = _constraint((T)inputValue);
                    return true;
                }

                outputValue = default;
                return false;
            }

public void AddToEndOfChain(IValueConstraint<T> constraint)
        {
            if (constraint is null)
            {
                return;
            }

            Func<T, T> PreviousTotal = constraint.TotalFunc;
            TotalFunc = (x) => MyFunc(PreviousTotal(x));;
        }

public static bool Every<T>(List<T> list, Func<T, bool> func)
        {
            for (int i = 0; list != null && i < list.Count; ++i)
            {
                if (!func(list[i])) return false;
            }

            return true;
        }

public static T First<T>(IList<T> list, Func<T, bool> condition)
        {
            for (int i = 0; list != null && i < list.Count; ++i)
            {
                if (condition(list[i])) return list[i];
            }

            return default(T);
        }

public static void ForEach<T, V, P1>(IList<T> list, Func<T, V> selector, Action<V, P1> action, P1 param1)
        {
            for (int i = 0; list != null && i < list.Count; ++i)
            {
                action(selector(list[i]), param1);
            }
        }

public static void ForEach<T, V, P1, P2>(IList<T> list, Func<T, V> selector, Action<V, P1, P2> action, P1 param1, P2 param2)
        {
            for (int i = 0; list != null && i < list.Count; ++i)
            {
                action(selector(list[i]), param1, param2);
            }
        }

public static void ForEach<T, V, P1, P2, P3>(IList<T> list, Func<T, V> selector, Action<V, P1, P2, P3> action, P1 param1, P2 param2, P3 param3)
        {
            for (int i = 0; list != null && i < list.Count; ++i)
            {
                action(selector(list[i]), param1, param2, param3);
            }
        }

public static Func<T, T> Pipe<T>(IList<Func<T, T>> list)
        {
            // OPEN POINT: Is it possible to make Reduce more flexible and use it here instead of this custom implementation
            return x =>
            {
                T acreplacedulator = x;
                for (int i = 0; list != null && i < list.Count; ++i)
                {
                    acreplacedulator = list[i](acreplacedulator);
                }

                return acreplacedulator;
            };
        }

public static R Reduce<R, T>(IList<T> list, Func<R, R, R> reducer, Func<T, R> getValue, R initialValue, Func<T, bool> skip = null)
        {
            R acreplacedulator = initialValue;
            for (int i = 0; list != null && i < list.Count; ++i)
            {
                if (skip != null && skip(list[i]))
                {
                    continue;
                }

                acreplacedulator = reducer(acreplacedulator, getValue(list[i]));
            }

            return acreplacedulator;
        }

public static R Reduce<R, T, P1>(IList<T> list, Func<R, R, P1, R> reducer, Func<T, R> getValue, R initialValue, P1 reducerParam1, Func<T, bool> skip = null)
        {
            R acreplacedulator = initialValue;
            for (int i = 0; list != null && i < list.Count; ++i)
            {
                if (skip != null && skip(list[i]))
                {
                    continue;
                }

                acreplacedulator = reducer(acreplacedulator, getValue(list[i]), reducerParam1);
            }

            return acreplacedulator;
        }

public static byte[] FromArray<T>(T[] data, int sizeOfPrimitiveType, Func<T, byte[]> arr, DateTimeOffset? timestamp = null)
        {
            byte[] array = new byte[data.Length * sizeOfPrimitiveType];

            for (int i = 0; i < data.Length; i++)
            {
                var res = arr(data[i]);
                Array.Copy(res, 0, array, sizeOfPrimitiveType * i, sizeOfPrimitiveType);
            }

            return array.AppendTimestamp(timestamp);
        }

public static U[] Map<T, U>(ICollection<T> source, Func<T, U> func)
        {
            U[] result = new U[source.Count];
            int i = 0;

            foreach (T sVal in source)
            {
                result[i++] = func(sVal);
            }

            return result;
        }

public static U[] Map<T, U>(IEnumerable<T> source, Func<T, U> func)
        {
            List<U> result = new List<U>();

            foreach (T sVal in source)
            {
                result.Add(func(sVal));
            }

            return result.ToArray();
        }

public static C Filter<C, T>(ICollection<T> source, Func<T, bool> predicate) where C : ICollection<T>, new()
        {
            C result = new C();
            foreach (T val in source)
            {
                if (predicate(val))
                {
                    result.Add(val);
                }
            }

            return result;
        }