45 lines
1.2 KiB
C#
45 lines
1.2 KiB
C#
namespace PkmnLib.Static.Utils;
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/// <summary>
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/// Extension methods for <see cref="IEnumerable{T}"/>.
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/// </summary>
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public static class EnumerableHelpers
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{
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/// <summary>
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/// Returns all elements of the enumerable that are not null.
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/// </summary>
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public static IEnumerable<T> WhereNotNull<T>(this IEnumerable<T?> enumerable) where T : class =>
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enumerable.Where(x => x is not null)!;
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/// <summary>
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/// Finds the index of a value in an enumerable. Returns -1 if the value is not found.
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/// </summary>
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public static int IndexOf<T>(this IEnumerable<T> enumerable, T value)
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{
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var index = 0;
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foreach (var item in enumerable)
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{
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if (item is null)
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{
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if (value is null)
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return index;
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continue;
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}
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if (item.Equals(value))
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return index;
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index++;
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}
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return -1;
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}
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public static void RemoveAll<T>(this IList<T> list, Func<T, bool> predicate)
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{
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for (var i = list.Count - 1; i >= 0; i--)
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{
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if (predicate(list[i]))
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list.RemoveAt(i);
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}
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}
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} |