JavaScript: Bubble Sort algorithm

Last update on May 30 2022 10:02:18 (UTC/GMT +8 hours)

JavaScript Function: Exercise-24 with Solution

Write a JavaScript function to apply Bubble Sort algorithm.

Note : According to wikipedia "Bubble sort, sometimes referred to as sinking sort, is a simple sorting algorithm that works by repeatedly stepping through the list to be sorted, comparing each pair of adjacent items and swapping them if they are in the wrong order".

Sample array: [12, 345, 4, 546, 122, 84, 98, 64, 9, 1, 3223, 455, 23, 234, 213]
Expected output: [3223, 546, 455, 345, 234, 213, 122, 98, 84, 64, 23, 12, 9, 4, 1]

Step by step pictorial presentation:

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Bubble Sort algorithm</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function bubble_Sort(a)
{
    var swapp;
    var n = a.length-1;
    var x=a;
    do {
        swapp = false;
        for (var i=0; i < n; i++)
        {
            if (x[i] < x[i+1])
            {
               var temp = x[i];
               x[i] = x[i+1];
               x[i+1] = temp;
               swapp = true;
            }
        }
        n--;
    } while (swapp);
 return x; 
}

console.log(bubble_Sort([12, 345, 4, 546, 122, 84, 98, 64, 9, 1, 3223, 455, 23, 234, 213]));

Output:

[3223,546,455,345,234,213,122,98,84,64,23,12,9,4,1]

Flowchart:

Live Demo:

See the Pen javascript-function-exercise-24 by w3resource (@w3resource) on CodePen.

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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