ClearScript/ClearScript/Util/ArrayHelpers.cs at master · ehtick/ClearScript · GitHub

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// Licensed under the MIT license.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

namespace Microsoft.ClearScript.Util

{

internal static class ArrayHelpers

{

public static void Iterate(this Array array, Action<int[]> action)

{

if (array.Rank > 0)

{

var dimensions = Enumerable.Range(0, array.Rank);

if (dimensions.Aggregate(1, (count, dimension) => count * array.GetLength(dimension)) > 0)

{

Iterate(array, new int[array.Rank], 0, action);

}

private static void Iterate(Array array, int[] indices, int dimension, Action<int[]> action)

{

if (dimension >= indices.Length)

{

action(indices);

}

else

{

var lowerBound = array.GetLowerBound(dimension);

var upperBound = array.GetUpperBound(dimension);

for (var index = lowerBound; index <= upperBound; index++)

{

indices[dimension] = index;

Iterate(array, indices, dimension + 1, action);

}

public static T[] GetEmptyArray<T>()

{

return EmptyArray<T>.Value;

}

public static async IAsyncEnumerable<T> AsAsyncEnumerable<T>(this T[] array)

{

foreach (var item in array)

{

await Task.CompletedTask;

yield return item;

}

#region Nested type: EmptyArray<T>

private static class EmptyArray<T>

{

public static readonly T[] Value = new T[0];

}

#endregion

}

ClearScript/ClearScript/Util/ArrayHelpers.cs at master · ehtick/ClearScript · GitHub

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