Typical print of jagged arrays
I am currently working with a lot of arrays and for debugging purposes I wrote a generic method Print()
to print different types of arrays
static void Main()
{
Print(new double[]{ 1, 2, 3 });
// Output: [ 1, 2, 3 ]
}
static void Print<T>(T[] array)
{
int size = array.Length;
if (size == 0)
return;
string str = "[ ";
for (int i = 0; i < size; i++)
{
str += array[i].ToString();
if (i < size - 1)
str += ", ";
}
str += " ]";
Console.WriteLine(str);
}
which still works. Then I wanted to print an array of arrays, for example double[][]
, and tried the following:
static void Main()
{
Print(new double[][]
{
new double[] { 1, 2 },
new double[] { 3, 4 },
new double[] { 5, 6 },
});
// Output: [ 1, 2 ]
// [ 3, 4 ]
// [ 5, 6 ]
}
static void Print<T>(T[] array)
{
if (array.Length == 0)
return;
if (array[0].GetType().IsArray)
{
foreach (var element in array)
{
Print<T>(element);
}
}
else
{
int size = array.Length;
string str = "[ ";
for (int i = 0; i < size; i++)
{
str += array[i].ToString();
if (i < size - 1)
str += ", ";
}
str += " ]";
Console.WriteLine(str);
}
}
I just wanted to check if the elements are array
again arrays, and if so, I call the Print function again for each element
one array
. But it Print(element)
doesn't work because it element
has a type T
, not T[]
, and I don't know how to tell the compiler what T
is an array in this case . What do I need to do to make this work?
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You must provide 2 overloads of your method Print
- you can call the 1D version from the 2D version as you like:
static void Print<T>(T[][] array)
{
Console.WriteLine("Print 2D Array");
}
static void Print<T>(T[] array)
{
Console.WriteLine("Print 1D Array");
}
Live example: http://rextester.com/LYBUN44476
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You can do this using dynamics:
void Main()
{
Print(new double[][]
{
new double[] { 1, 2 },
new double[] { 3, 4 },
new double[] { 5, 6 },
});
// Output: [ 1, 2 ]
// [ 3, 4 ]
// [ 5, 6 ]
}
static void Print(dynamic array)
{
if (array.Length == 0)
return;
if (array[0].GetType().IsArray)
{
foreach (var element in array)
{
Print(element);
}
}
else
{
int size = array.Length;
string str = "[ ";
for (int i = 0; i < size; i++)
{
str += array[i].ToString();
if (i < size - 1)
str += ", ";
}
str += " ]";
Console.WriteLine(str);
}
}
If you want to test less of the code - I suggest using LinqPad where you have AnyType.Dump () method and you don't have to implement anything;)
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