Differences

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--- swdev:dotnet:arrays [2011/04/08 11:18]
smayr
+++ swdev:dotnet:arrays [2011/05/24 15:48] (current)
smayr [Resources]
@@ Line 17: / Line 17: @@
 <code csharp>
 // allocate memory
-int array[][] = new int[2][10];
+int array[,] = new int[2][10];
 // use array
 array[0,2] = 15;
 </code>
+=== Getting Dimensions ===
+When traversing an array using loops, for example, there are a couple of ways to do it:
+<code csharp>
+// Single Dimension
+int SingleDimArr[] = new int[10];
+for (int i = 0; i < SingleDimArr.Length; i++) // rows
+{
+    SingleDimArr[i, 0] = 0;
+}
+// Multi-dimensions
+int DoubleDimArr[,] = new int[2,10];
+for (int i = 0; i < DoubleDimArr.GetLength(0); i++) // rows
+{
+    for (int j = 0; j < DoubleDimArr.GetLength(1); j++)  // columns
+    {
+        DoubleDimArr[i, j] = 0;
+    }
+}
+</code>
+Alternatively, you can traverse without knowing dimensions if you simply need the array values:
+<code csharp>
+int[,] arr = new int[,] {{1,2,3}, {4,5,6}, {7,8,9}, {10,11,12}};
+foreach(int a[] in arr)
+{
+  foreach(int i in a)
+  {
+    Console.WriteLine(i);
+  }
+}
+</code>
+== Resources ==
+  * [[http://www.csharp-station.com/Tutorials/Lesson02.aspx|C# Tutorial: Lesson 2: Arrays]]
+  * [[http://msdn.microsoft.com/en-us/library/aa288453(v=vs.71).aspx|MSND: Arrays Tutorial]]