68 lines
1.8 KiB
C#
68 lines
1.8 KiB
C#
// Copyright 2010-2024 Google LLC
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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namespace Google.OrTools
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{
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using System;
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using System.Collections.Generic;
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public static class NestedArrayHelper
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{
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public static T[] GetFlatArray<T>(T[][] arr)
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{
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int flatLength = 0;
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for (var i = 0; i < arr.GetLength(0); i++)
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flatLength += arr[i].GetLength(0);
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int idx = 0;
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T[] flat = new T[flatLength];
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for (int i = 0; i < arr.GetLength(0); i++)
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{
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for (int j = 0; j < arr[i].GetLength(0); j++)
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flat[idx++] = arr[i][j];
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}
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return flat;
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}
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public static T[] GetFlatArrayFromMatrix<T>(T[,] arr)
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{
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int flatLength = arr.GetLength(0) * arr.GetLength(1);
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int idx = 0;
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T[] flat = new T[flatLength];
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for (int i = 0; i < arr.GetLength(0); i++)
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{
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for (int j = 0; j < arr.GetLength(1); j++)
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flat[idx++] = arr[i, j];
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}
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return flat;
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}
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public static int[] GetArraySecondSize<T>(T[][] arr)
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{
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var result = new int[arr.GetLength(0)];
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for (var i = 0; i < arr.GetLength(0); i++)
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{
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if (arr[i] is not null)
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result[i] = arr[i].Length;
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}
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return result;
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}
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}
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} // namespace Google.OrTools
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