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Diffstat (limited to 'MediaBrowser.Model/Extensions/LinqExtensions.cs')
| -rw-r--r-- | MediaBrowser.Model/Extensions/LinqExtensions.cs | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/MediaBrowser.Model/Extensions/LinqExtensions.cs b/MediaBrowser.Model/Extensions/LinqExtensions.cs deleted file mode 100644 index 09ace42e8..000000000 --- a/MediaBrowser.Model/Extensions/LinqExtensions.cs +++ /dev/null @@ -1,97 +0,0 @@ -using System; -using System.Collections.Generic; - -namespace MediaBrowser.Model.Extensions -{ - // MoreLINQ - Extensions to LINQ to Objects - // Copyright (c) 2008 Jonathan Skeet. All rights reserved. - // - // Licensed under the Apache License, Version 2.0 (the "License"); - // you may not use this file except in compliance with the License. - // You may obtain a copy of the License at - // - // http://www.apache.org/licenses/LICENSE-2.0 - // - // Unless required by applicable law or agreed to in writing, software - // distributed under the License is distributed on an "AS IS" BASIS, - // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - // See the License for the specific language governing permissions and - // limitations under the License. - - public static class LinqExtensions - { - /// <summary> - /// Returns all distinct elements of the given source, where "distinctness" - /// is determined via a projection and the default equality comparer for the projected type. - /// </summary> - /// <remarks> - /// This operator uses deferred execution and streams the results, although - /// a set of already-seen keys is retained. If a key is seen multiple times, - /// only the first element with that key is returned. - /// </remarks> - /// <typeparam name="TSource">Type of the source sequence</typeparam> - /// <typeparam name="TKey">Type of the projected element</typeparam> - /// <param name="source">Source sequence</param> - /// <param name="keySelector">Projection for determining "distinctness"</param> - /// <returns>A sequence consisting of distinct elements from the source sequence, - /// comparing them by the specified key projection.</returns> - - public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> source, - Func<TSource, TKey> keySelector) - { - return source.DistinctBy(keySelector, null); - } - - public static TSource[] ToArray<TSource>(this IEnumerable<TSource> source, int count) - { - if (source == null) throw new ArgumentNullException("source"); - if (count < 0) throw new ArgumentOutOfRangeException("count"); - var array = new TSource[count]; - int i = 0; - foreach (var item in source) - { - array[i++] = item; - } - return array; - } - - /// <summary> - /// Returns all distinct elements of the given source, where "distinctness" - /// is determined via a projection and the specified comparer for the projected type. - /// </summary> - /// <remarks> - /// This operator uses deferred execution and streams the results, although - /// a set of already-seen keys is retained. If a key is seen multiple times, - /// only the first element with that key is returned. - /// </remarks> - /// <typeparam name="TSource">Type of the source sequence</typeparam> - /// <typeparam name="TKey">Type of the projected element</typeparam> - /// <param name="source">Source sequence</param> - /// <param name="keySelector">Projection for determining "distinctness"</param> - /// <param name="comparer">The equality comparer to use to determine whether or not keys are equal. - /// If null, the default equality comparer for <c>TSource</c> is used.</param> - /// <returns>A sequence consisting of distinct elements from the source sequence, - /// comparing them by the specified key projection.</returns> - - public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> source, - Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer) - { - if (source == null) throw new ArgumentNullException("source"); - if (keySelector == null) throw new ArgumentNullException("keySelector"); - return DistinctByImpl(source, keySelector, comparer); - } - - private static IEnumerable<TSource> DistinctByImpl<TSource, TKey>(IEnumerable<TSource> source, - Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer) - { - var knownKeys = new HashSet<TKey>(comparer); - foreach (var element in source) - { - if (knownKeys.Add(keySelector(element))) - { - yield return element; - } - } - } - } -} |
