Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / Microsoft / Scripting / Utils / CollectionExtensions.cs / 1305376 / CollectionExtensions.cs
/* **************************************************************************** * * Copyright (c) Microsoft Corporation. * * This source code is subject to terms and conditions of the Microsoft Public License. A * copy of the license can be found in the License.html file at the root of this distribution. If * you cannot locate the Microsoft Public License, please send an email to * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound * by the terms of the Microsoft Public License. * * You must not remove this notice, or any other, from this software. * * * ***************************************************************************/ using System.Collections.Generic; using System.Collections.ObjectModel; using System.Diagnostics; #if !MICROSOFT_SCRIPTING_CORE using System.Diagnostics.Contracts; #endif using System.Runtime.CompilerServices; namespace System.Dynamic.Utils { internal static class CollectionExtensions { ////// Wraps the provided enumerable into a ReadOnlyCollection{T} /// /// Copies all of the data into a new array, so the data can't be /// changed after creation. The exception is if the enumerable is /// already a ReadOnlyCollection{T}, in which case we just return it. /// #if !MICROSOFT_SCRIPTING_CORE [Pure] #endif internal static ReadOnlyCollectionToReadOnly (this IEnumerable enumerable) { if (enumerable == null) { return EmptyReadOnlyCollection .Instance; } var troc = enumerable as TrueReadOnlyCollection ; if (troc != null) { return troc; } var builder = enumerable as ReadOnlyCollectionBuilder ; if (builder != null) { return builder.ToReadOnlyCollection(); } var collection = enumerable as ICollection ; if (collection != null) { int count = collection.Count; if (count == 0) { return EmptyReadOnlyCollection .Instance; } T[] clone = new T[count]; collection.CopyTo(clone, 0); return new TrueReadOnlyCollection (clone); } // ToArray trims the excess space and speeds up access return new TrueReadOnlyCollection (new List (enumerable).ToArray()); } // We could probably improve the hashing here internal static int ListHashCode (this IEnumerable list) { var cmp = EqualityComparer .Default; int h = 6551; foreach (T t in list) { h ^= (h << 5) ^ cmp.GetHashCode(t); } return h; } #if !MICROSOFT_SCRIPTING_CORE [Pure] #endif internal static bool ListEquals (this ICollection first, ICollection second) { if (first.Count != second.Count) { return false; } var cmp = EqualityComparer .Default; var f = first.GetEnumerator(); var s = second.GetEnumerator(); while (f.MoveNext()) { s.MoveNext(); if (!cmp.Equals(f.Current, s.Current)) { return false; } } return true; } internal static IEnumerable Select (this IEnumerable enumerable, Func select) { foreach (T t in enumerable) { yield return select(t); } } // Name needs to be different so it doesn't conflict with Enumerable.Select internal static U[] Map (this ICollection collection, Func select) { int count = collection.Count; U[] result = new U[count]; count = 0; foreach (T t in collection) { result[count++] = select(t); } return result; } internal static IEnumerable Where (this IEnumerable enumerable, Func where) { foreach (T t in enumerable) { if (where(t)) { yield return t; } } } internal static bool Any (this IEnumerable source, Func predicate) { foreach (T element in source) { if (predicate(element)) { return true; } } return false; } internal static bool All (this IEnumerable source, Func predicate) { foreach (T element in source) { if (!predicate(element)) { return false; } } return true; } internal static T[] RemoveFirst (this T[] array) { T[] result = new T[array.Length - 1]; Array.Copy(array, 1, result, 0, result.Length); return result; } internal static T[] RemoveLast (this T[] array) { T[] result = new T[array.Length - 1]; Array.Copy(array, 0, result, 0, result.Length); return result; } internal static T[] AddFirst (this IList list, T item) { T[] res = new T[list.Count + 1]; res[0] = item; list.CopyTo(res, 1); return res; } internal static T[] AddLast (this IList list, T item) { T[] res = new T[list.Count + 1]; list.CopyTo(res, 0); res[list.Count] = item; return res; } internal static T First (this IEnumerable source) { var list = source as IList ; if (list != null) { return list[0]; } using (var e = source.GetEnumerator()) { if (e.MoveNext()) return e.Current; } throw new InvalidOperationException(); } internal static T Last (this IList list) { return list[list.Count - 1]; } internal static T[] Copy (this T[] array) { T[] copy = new T[array.Length]; Array.Copy(array, copy, array.Length); return copy; } } internal static class EmptyReadOnlyCollection { internal static ReadOnlyCollection Instance = new TrueReadOnlyCollection (new T[0]); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. /* **************************************************************************** * * Copyright (c) Microsoft Corporation. * * This source code is subject to terms and conditions of the Microsoft Public License. A * copy of the license can be found in the License.html file at the root of this distribution. If * you cannot locate the Microsoft Public License, please send an email to * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound * by the terms of the Microsoft Public License. * * You must not remove this notice, or any other, from this software. * * * ***************************************************************************/ using System.Collections.Generic; using System.Collections.ObjectModel; using System.Diagnostics; #if !MICROSOFT_SCRIPTING_CORE using System.Diagnostics.Contracts; #endif using System.Runtime.CompilerServices; namespace System.Dynamic.Utils { internal static class CollectionExtensions { /// /// Wraps the provided enumerable into a ReadOnlyCollection{T} /// /// Copies all of the data into a new array, so the data can't be /// changed after creation. The exception is if the enumerable is /// already a ReadOnlyCollection{T}, in which case we just return it. /// #if !MICROSOFT_SCRIPTING_CORE [Pure] #endif internal static ReadOnlyCollectionToReadOnly (this IEnumerable enumerable) { if (enumerable == null) { return EmptyReadOnlyCollection .Instance; } var troc = enumerable as TrueReadOnlyCollection ; if (troc != null) { return troc; } var builder = enumerable as ReadOnlyCollectionBuilder ; if (builder != null) { return builder.ToReadOnlyCollection(); } var collection = enumerable as ICollection ; if (collection != null) { int count = collection.Count; if (count == 0) { return EmptyReadOnlyCollection .Instance; } T[] clone = new T[count]; collection.CopyTo(clone, 0); return new TrueReadOnlyCollection (clone); } // ToArray trims the excess space and speeds up access return new TrueReadOnlyCollection (new List (enumerable).ToArray()); } // We could probably improve the hashing here internal static int ListHashCode (this IEnumerable list) { var cmp = EqualityComparer .Default; int h = 6551; foreach (T t in list) { h ^= (h << 5) ^ cmp.GetHashCode(t); } return h; } #if !MICROSOFT_SCRIPTING_CORE [Pure] #endif internal static bool ListEquals (this ICollection first, ICollection second) { if (first.Count != second.Count) { return false; } var cmp = EqualityComparer .Default; var f = first.GetEnumerator(); var s = second.GetEnumerator(); while (f.MoveNext()) { s.MoveNext(); if (!cmp.Equals(f.Current, s.Current)) { return false; } } return true; } internal static IEnumerable Select (this IEnumerable enumerable, Func select) { foreach (T t in enumerable) { yield return select(t); } } // Name needs to be different so it doesn't conflict with Enumerable.Select internal static U[] Map (this ICollection collection, Func select) { int count = collection.Count; U[] result = new U[count]; count = 0; foreach (T t in collection) { result[count++] = select(t); } return result; } internal static IEnumerable Where (this IEnumerable enumerable, Func where) { foreach (T t in enumerable) { if (where(t)) { yield return t; } } } internal static bool Any (this IEnumerable source, Func predicate) { foreach (T element in source) { if (predicate(element)) { return true; } } return false; } internal static bool All (this IEnumerable source, Func predicate) { foreach (T element in source) { if (!predicate(element)) { return false; } } return true; } internal static T[] RemoveFirst (this T[] array) { T[] result = new T[array.Length - 1]; Array.Copy(array, 1, result, 0, result.Length); return result; } internal static T[] RemoveLast (this T[] array) { T[] result = new T[array.Length - 1]; Array.Copy(array, 0, result, 0, result.Length); return result; } internal static T[] AddFirst (this IList list, T item) { T[] res = new T[list.Count + 1]; res[0] = item; list.CopyTo(res, 1); return res; } internal static T[] AddLast (this IList list, T item) { T[] res = new T[list.Count + 1]; list.CopyTo(res, 0); res[list.Count] = item; return res; } internal static T First (this IEnumerable source) { var list = source as IList ; if (list != null) { return list[0]; } using (var e = source.GetEnumerator()) { if (e.MoveNext()) return e.Current; } throw new InvalidOperationException(); } internal static T Last (this IList list) { return list[list.Count - 1]; } internal static T[] Copy (this T[] array) { T[] copy = new T[array.Length]; Array.Copy(array, copy, array.Length); return copy; } } internal static class EmptyReadOnlyCollection { internal static ReadOnlyCollection Instance = new TrueReadOnlyCollection (new T[0]); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- WeakReferenceList.cs
- ServiceManager.cs
- NameValueFileSectionHandler.cs
- ViewStateAttachedPropertyFeature.cs
- HatchBrush.cs
- XPathItem.cs
- ImmutableClientRuntime.cs
- DetailsViewModeEventArgs.cs
- CircleHotSpot.cs
- WebBrowserDocumentCompletedEventHandler.cs
- HttpRuntime.cs
- DotAtomReader.cs
- XamlToRtfWriter.cs
- Pair.cs
- WorkflowApplicationEventArgs.cs
- DLinqTableProvider.cs
- FrugalMap.cs
- ByValueEqualityComparer.cs
- CustomSignedXml.cs
- HexParser.cs
- WindowsEditBoxRange.cs
- ContentTextAutomationPeer.cs
- MonitorWrapper.cs
- SerTrace.cs
- HWStack.cs
- JsonGlobals.cs
- SelectedDatesCollection.cs
- InvariantComparer.cs
- CSharpCodeProvider.cs
- SatelliteContractVersionAttribute.cs
- HashCodeCombiner.cs
- Viewport3DVisual.cs
- HebrewNumber.cs
- EntityContainer.cs
- StrokeCollection.cs
- FlowchartStart.xaml.cs
- PeerResolver.cs
- _HTTPDateParse.cs
- FontFamilyValueSerializer.cs
- XPathNavigatorKeyComparer.cs
- SdlChannelSink.cs
- NameObjectCollectionBase.cs
- _RequestCacheProtocol.cs
- CacheEntry.cs
- WpfKnownMemberInvoker.cs
- WindowsBrush.cs
- URIFormatException.cs
- QueryLifecycle.cs
- CustomErrorsSection.cs
- CharKeyFrameCollection.cs
- CompositeActivityMarkupSerializer.cs
- CanonicalizationDriver.cs
- ColumnReorderedEventArgs.cs
- latinshape.cs
- Variable.cs
- TriggerActionCollection.cs
- ParentUndoUnit.cs
- DefaultTextStoreTextComposition.cs
- XomlCompilerParameters.cs
- DashStyle.cs
- TreeViewTemplateSelector.cs
- OutKeywords.cs
- FrameDimension.cs
- BindingExpressionUncommonField.cs
- XmlnsDictionary.cs
- QuadraticBezierSegment.cs
- SmtpNtlmAuthenticationModule.cs
- CookieProtection.cs
- FontDriver.cs
- FormViewDeleteEventArgs.cs
- _HTTPDateParse.cs
- OracleInternalConnection.cs
- ColumnWidthChangingEvent.cs
- SpotLight.cs
- ResourceCategoryAttribute.cs
- BitVector32.cs
- PolicyStatement.cs
- FileLogRecordStream.cs
- HtmlInputImage.cs
- Tuple.cs
- Metadata.cs
- ISAPIRuntime.cs
- UiaCoreTypesApi.cs
- MDIControlStrip.cs
- HeaderedContentControl.cs
- NativeBuffer.cs
- CanonicalXml.cs
- SparseMemoryStream.cs
- IncrementalHitTester.cs
- Image.cs
- StatusBar.cs
- Separator.cs
- NullReferenceException.cs
- ClientSettingsSection.cs
- PathGradientBrush.cs
- EntityContainerEmitter.cs
- Border.cs
- FacetDescription.cs
- _LocalDataStore.cs
- GradientStop.cs