
Sorting Algorithm

This is a sorting algorithm.   It may be applied to a set of data in order to sort it.    
For comparing various sorts, see compare sorts.  
For other sorting algorithms,   see sorting algorithms,   or:

O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
O(n2) sorts
Bubble sort |
Cocktail sort |
Cocktail sort with shifting bounds |
Comb sort |
Cycle sort |
Gnome sort |
Insertion sort |
Selection sort |
Strand sort
other sorts
Bead sort |
Bogo sort |
Common sorted list |
Composite structures sort |
Custom comparator sort |
Counting sort |
Disjoint sublist sort |
External sort |
Jort sort |
Lexicographical sort |
Natural sorting |
Order by pair comparisons |
Order disjoint list items |
Order two numerical lists |
Object identifier (OID) sort |
Pancake sort |
Quickselect |
Permutation sort |
Radix sort |
Ranking methods |
Remove duplicate elements |
Sleep sort |
Stooge sort |
[Sort letters of a string] |
Three variable sort |
Topological sort |
Tree sort


Task

Implement a permutation sort, which proceeds by generating the possible permutations
of the input array/list until discovering the sorted one.

Pseudocode:

while not InOrder(list) do
    nextPermutation(list)
done



 
public static class PermutationSorter
{
    public static void Sort<T>(List<T> list) where T : IComparable
    {
        PermutationSort(list, 0);
    }
    public static bool PermutationSort<T>(List<T> list, int i) where T : IComparable
    {
        int j;
        if (issorted(list, i))
        {
            return true;
        }
        for (j = i + 1; j < list.Count; j++)
        {
            T temp = list[i];
            list[i] = list[j];
            list[j] = temp;
            if (PermutationSort(list, i + 1))
            {
                return true;
            }
            temp = list[i];
            list[i] = list[j];
            list[j] = temp;
        }
        return false;
    }
    public static bool issorted<T>(List<T> list, int i) where T : IComparable
    {
	    for (int j = list.Count-1; j > 0; j--)
        {
	        if(list[j].CompareTo(list[j-1])<0)
            {
		        return false;
	        }
	    }
	    return true;
    }
}
 