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| 1 | +// ****************************************************************************************************************************** |
| 2 | +// |
| 3 | +// Copyright (c) 2018-2022 InterlockLedger Network |
| 4 | +// All rights reserved. |
| 5 | +// |
| 6 | +// Redistribution and use in source and binary forms, with or without |
| 7 | +// modification, are permitted provided that the following conditions are met |
| 8 | +// |
| 9 | +// * Redistributions of source code must retain the above copyright notice, this |
| 10 | +// list of conditions and the following disclaimer. |
| 11 | +// |
| 12 | +// * Redistributions in binary form must reproduce the above copyright notice, |
| 13 | +// this list of conditions and the following disclaimer in the documentation |
| 14 | +// and/or other materials provided with the distribution. |
| 15 | +// |
| 16 | +// * Neither the name of the copyright holder nor the names of its |
| 17 | +// contributors may be used to endorse or promote products derived from |
| 18 | +// this software without specific prior written permission. |
| 19 | +// |
| 20 | +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 21 | +// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | +// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 23 | +// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| 24 | +// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | +// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 26 | +// SERVICES, LOSS OF USE, DATA, OR PROFITS, OR BUSINESS INTERRUPTION) HOWEVER |
| 27 | +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 28 | +// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 29 | +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | +// |
| 31 | +// ****************************************************************************************************************************** |
| 32 | + |
| 33 | +namespace System.Collections.Generic; |
| 34 | + |
| 35 | +public static class IEnumerableOfClassExtensions |
| 36 | +{ |
| 37 | + public static IEnumerable<T> NonNulls<T>(this IEnumerable<T?>? values) where T : class |
| 38 | + => values.Safe().Skip(item => item is null)!; |
| 39 | + |
| 40 | + public static T[] NonEmpty<T>([NotNull] this T[] items, [CallerArgumentExpression("items")] string? parameterName = null) => |
| 41 | + items is null || items.Length == 0 ? throw new ArgumentException("Should not be empty", parameterName) : items; |
| 42 | +} |
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