I'm fairly new with C# and having trouble converting some array types.
JavaScript code:
function toMatrix(list, elementsPerSubArray) {
var matrix = [], i, k;
for (i = 0, k = -1; i < list.length; i++) {
if (i % elementsPerSubArray === 0) {
k++;
matrix[k] = [];
}
matrix[k].push(list[i]);
}
return matrix;
}
I have tried converting the code but I struggle with the arrays in C#.
This may be easy to some, how would I do this?
Thanks.
Here is an attempt. I used a generic parameter for the item type:
List<List<T>> toMatrix<T>(List<T> list, int elementsPerSubArray)
{
var matrix = new List<List<T>>();
int k = -1;
for (int i = 0 ; i < list.Length; i++)
{
if (i % elementsPerSubArray == 0)
{
k++;
matrix.Add(new List<T>());
}
matrix[k].Add(list[i]);
}
return matrix;
}
Test:
List<int> input = new List<int> { 1, 2, 3, 4, 5, };
var result = toMatrix(input, 2);
foreach (var outer in result)
Console.WriteLine(string.Join(", ", outer));
matrix.Aggregate(new T[0], (array, matrixRow) => array.Concat(matrixRow).ToArray());. This is why I love Linq: it's a glimpse into a functional programming view of the world, implemented in what was originally an object-oriented language.A Linq version would look like this.
using System.Linq;
using System.Collections.Generic;
public T[][] ToMatrix<T>(T[] array, int elementsPerSubArray)
{
var list = new List<T[]>();
while (array.Any())
{
list.Add(array.Take(elementsPerSubArray).ToArray());
array = array.Skip(elementsPerSubArray).ToArray();
}
return list.ToArray();
}
Converting back can be achieved in one line:
public T[] ToArray<T>(T[][] matrix)
{
return matrix.Aggregate(new T[0], (array, matrixRow) => array.Concat(matrixRow).ToArray());
}
