JavaScript Searching and Sorting Algorithm: Bogosort

Last update on May 30 2022 10:06:20 (UTC/GMT +8 hours)

JavaScript Searching and Sorting Algorithm: Exercise-14 with Solution

Write a JavaScript program to sort a list of elements using Bogosort.

In computer science, bogosort is a particularly ineffective sorting algorithm based on the generate and test paradigm. The algorithm successively generates permutations of its input until it finds one that is sorted. It is not useful for sorting, but may be used for educational purposes, to contrast it with other more realistic algorithms.

Sample Solution: -

HTML Code:

<!DOCTYPE html>
  <html>
  <head>
  <meta charset="utf-8">
  <title>JavaScript program of Bogosort</title>
  </head>
  <body></body>
</html>

JavaScript Code:

function Bogosort(arr){
    var isSorted = function(arr){
        for(var i = 1; i < arr.length; i++){
            if (arr[i-1] > arr[i]) {
                return false;
            }
        }
        return true;
    };

    function shuffle(arr){
        var count = arr.length, temp, index;

        while(count > 0){
            index = Math.floor(Math.random() * count);
            count--;

            temp = arr[count];
            arr[count] = arr[index];
            arr[index] = temp;
        }

        return arr;
    }

   function sort(arr){
        var sorted = false;
        while(!sorted){
            arr = shuffle(arr);
            sorted = isSorted(arr);
        }
        return arr;
    }

    return sort(arr);
}


var arra = [3, 0, 2, 5, -1, 4, 1]; 
console.log("Original Array Elements"); 
console.log(arra); 
console.log("Sorted Array Elements"); 
console.log(Bogosort(arra));

Sample Output:

Original Array Elements
[3,0,2,5,-1,4,1]
Sorted Array Elements
[-1,0,1,2,3,4,5]

Flowchart:

JavaScript Searching and Sorting Algorithm Exercises: Bogosort

Live Demo:

See the Pen searching-and-sorting-algorithm-exercise-14 by w3resource (@w3resource) on CodePen.

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Next: Write a JavaScript program to sort an array of numbers, using the bucket sort algorithm.

JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());

Ref: https://bit.ly/2BXbp04