generated/runtime/BuildTime/CollectionExtensions.cs
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/*--------------------------------------------------------------------------------------------- * Copyright (c) Microsoft Corporation. All rights reserved. * Licensed under the MIT License. See License.txt in the project root for license information. *--------------------------------------------------------------------------------------------*/ using System; using System.Collections.Generic; using System.Linq; namespace Commvault.Powershell.Runtime.PowerShell { internal static class CollectionExtensions { public static T[] NullIfEmpty<T>(this T[] collection) => (collection?.Any() ?? false) ? collection : null; public static IEnumerable<T> EmptyIfNull<T>(this IEnumerable<T> collection) => collection ?? Enumerable.Empty<T>(); // https://stackoverflow.com/a/4158364/294804 public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> collection, Func<TSource, TKey> selector) => collection.GroupBy(selector).Select(group => group.First()); } } |