
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

Bogosort a list of numbers.



Bogosort simply shuffles a collection randomly until it is sorted.

"Bogosort" is a perversely inefficient algorithm only used as an in-joke.

Its average run-time is   O(n!)   because the chance that any given shuffle of a set will end up in sorted order is about one in   n   factorial,   and the worst case is infinite since there's no guarantee that a random shuffling will ever produce a sorted sequence.

Its best case is   O(n)   since a single pass through the elements may suffice to order them.



Pseudocode:

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



The Knuth shuffle may be used to implement the shuffle part of this algorithm.




import rand
 
fn shuffle_array(mut arr []int) {
    for i := arr.len - 1; i >= 0; i-- {
        j := rand.intn(i + 1)
        arr[i], arr[j] = arr[j], arr[i]
    }
}
 
fn is_sorted(arr []int) bool {
    for i := 0; i < arr.len - 1; i++ {
        if arr[i] > arr[i + 1] {
            return false
        }
    }
    return true
}
 
fn sort_array(mut arr []int) {
    for !is_sorted(arr) {
        shuffle_array(mut arr)
        println('After Shuffle: $arr')
    }
}
 
fn main() {
    mut array := [6, 9, 1, 4]
    println('Input: $array')
    sort_array(mut array)
    println('Output: $array')
}