将Jagged数组转换为IEnumerable >？(Convert Jagged Array to IEnumerable>?)

将Jagged数组转换为IEnumerable >？(Convert Jagged Array to IEnumerable>?)

我有这个Jagged数组：

（ n在编译时给出，所以请假设所有值都已存在）

int[][] jagged = new int[n][]; jagged[0] = new int[3]; jagged[0][0] = 2; // Please ignore the dummy values.... jagged[0][1] = 55; jagged[0][2] = 4; jagged[1] = new int[3]; jagged[1][0] = 6; jagged[1][1] = 3; jagged[1][2] = 7; ... ... jagged[n] = new int[3]; jagged[n][0] = 9; jagged[n][1] = 5; jagged[n][2] = 1;

我想从这个结构创建一个IEnumerable<KeyValuePair<int,int>> ，其中：

关键是： dummy value ， 值为 n （虚拟值是唯一的）

（除了信息 - 我需要将图片映射到用户）

所以对于第一组我想：

{2-> 0} {55-> 0} {4-> 0}

对于组#2

{6 -> 1} {3-> 1} {7-> 1} ... ... etc

但作为一个整体清单：

因此，最终结果应为1 IEnumerable KeyValuePair<int,int> ：

{2-> 0} {55-> 0} {4-> 0} {6 -> 1} {3-> 1} {7-> 1} ... {9 -> n} {5-> n} {1-> n}

题 ：

是否有任何Linq'y方式吗？（而不是循环遍历循环）？

I have this Jagged Array :

(n is given at compile time , so please assume that all values are already there)

int[][] jagged = new int[n][]; jagged[0] = new int[3]; jagged[0][0] = 2; // Please ignore the dummy values.... jagged[0][1] = 55; jagged[0][2] = 4; jagged[1] = new int[3]; jagged[1][0] = 6; jagged[1][1] = 3; jagged[1][2] = 7; ... ... jagged[n] = new int[3]; jagged[n][0] = 9; jagged[n][1] = 5; jagged[n][2] = 1;

I want to create a IEnumerable<KeyValuePair<int,int>> from this structure where :

key is : dummy value and the value is the n ( dummy value is unique)

(aside info - I need to map pictures to users)

So for group #1 I want:

{2-> 0} {55-> 0} {4-> 0}

for group #2

{6 -> 1} {3-> 1} {7-> 1} ... ... etc

But as a whole list :

So final result should be 1 IEnumerable of KeyValuePair<int,int>:

{2-> 0} {55-> 0} {4-> 0} {6 -> 1} {3-> 1} {7-> 1} ... {9 -> n} {5-> n} {1-> n}

Question :

Is there any Linq'y way of doing it ?(instead of loops over loops ) ?

最满意答案

foreach (var t in jagged.SelectMany((row, rowIndex) => row.Select(value => new KeyValuePair<int, int>(value, rowIndex)))) { Console.WriteLine("{0} - {1}", t.Key, t.Value); } foreach (var t in jagged.SelectMany((row, rowIndex) => row.Select(value => new KeyValuePair<int, int>(value, rowIndex)))) { Console.WriteLine("{0} - {1}", t.Key, t.Value); }