61 lines
2.8 KiB
C#
61 lines
2.8 KiB
C#
// Copyright (C) 2025, The Duplicati Team
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// https://duplicati.com, hello@duplicati.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#nullable enable
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using System.Collections.Generic;
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using System.Linq;
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namespace Duplicati.Library.Utility;
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/// <summary>
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/// Contains extension methods for <see cref="IEnumerable{T}"/>.
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/// </summary>
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public static class EnumerableExtensions
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{
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/// <summary>
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/// Filters a sequence of values to exclude null elements.
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/// </summary>
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/// <param name="source">The sequence to filter.</param>
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/// <returns>A sequence that contains only the non-null elements from the input sequence.</returns>
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public static IEnumerable<T> WhereNotNull<T>(this IEnumerable<T?> source)
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=> source.Where(x => x != null)
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.Select(x => x!);
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/// <summary>
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/// Filters a sequence of values to exclude null elements.
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/// </summary>
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/// <param name="source">The sequence to filter.</param>
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/// <returns>A sequence that contains only the non-null elements from the input sequence.</returns>
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public static IEnumerable<T> WhereNotNull<T>(this IEnumerable<T?> source) where T : struct
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=> source.Where(x => x != null)
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.Select(x => x.Value);
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/// <summary>
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/// Filters a sequence of values to exclude null or whitespace elements.
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/// </summary>
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/// <param name="source">The sequence to filter.</param>
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/// <returns>A sequence that contains only the non-null and non-whitespace elements from the input sequence.</returns>
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public static IEnumerable<string> WhereNotNullOrWhiteSpace(this IEnumerable<string?> source)
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=> source.Where(x => !string.IsNullOrWhiteSpace(x))
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.Select(x => x!);
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}
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