28 lines
1.0 KiB
C#
28 lines
1.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace FruityFoundation.Base.Extensions;
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public static class EnumerableExtensions
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{
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public static IEnumerable<T> ConditionalConcat<T>(this IEnumerable<T> enumerable, bool isConditionValid, IEnumerable<T> second) =>
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!isConditionValid ? enumerable : enumerable.Concat(second);
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public static IEnumerable<T> ConditionalWhere<T>(this IEnumerable<T> enumerable, bool isConditionValid, Func<T, bool> pred) =>
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!isConditionValid ? enumerable : enumerable.Where(pred);
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public static IEnumerable<TOutput> Choose<TInput, TOutput>(this IEnumerable<TInput> enumerable, Func<TInput, TOutput?> mapper)
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where TInput : class? =>
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enumerable
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.Select(mapper)
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.Where(x => x is not null)
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.Cast<TOutput>();
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public static IEnumerable<TOutput> Choose<TInput, TOutput>(this IEnumerable<TInput> enumerable, Func<TInput, TOutput?> mapper)
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where TOutput : struct =>
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enumerable
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.Select(mapper)
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.Where(x => x.HasValue)
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.Select(x => x!.Value);
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} |