JavaScript Searching and Sorting Algorithm: Gnome sort

Last update on May 30 2022 10:06:40 (UTC/GMT +8 hours)

JavaScript Searching and Sorting Algorithm: Exercise-10 with Solution

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

Gnome sort is a sorting algorithm originally proposed by Dr. Hamid Sarbazi-Azad (Professor of Computer Engineering at Sharif University of Technology) in 2000 and called "stupid sort" (not to be confused with bogosort), and then later on described by Dick Grune and named "gnome sort".
The algorithm always finds the first place where two adjacent elements are in the wrong order, and swaps them. It takes advantage of the fact that performing a swap can introduce a new out-of-order adjacent pair only next to the two swapped elements.

A visualization of the gnome sort:

Sample Solution: -

HTML Code:

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

JavaScript Code:

function gnomeSort(arr) 
{
    function moveBack(i) 
  {
        for( ; i > 0 && arr[i-1] > arr[i]; i--)
        {
            var t = arr[i];
            arr[i] = arr[i-1];
            arr[i-1] = t;
        }
    }
    for (var i = 1; i < arr.length; i++) 
    {
        if (arr[i-1] > arr[i]) moveBack(i);
    }
    return 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(gnomeSort(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: Gnome sort

Live Demo:

See the Pen searching-and-sorting-algorithm-exercise-10 by w3resource (@w3resource) on CodePen.

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Previous: Write a JavaScript program to sort a list of elements using Comb sort.
Next: Write a JavaScript program to sort a list of elements using Counting sort.

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