Bubble Sort is the simplest sorting algorithm that works by repeatedly swapping the adjacent elements if they are in the wrong order.
In order to know more about it. Please refer Bubble Sort
Approach:
- Create an array of random values and render a bar corresponding to that value in terms of height.
- Create a function for bubble sort which compares the adjacent bar in order to swap the bar.
- In order to get better visualization, set the color to the bar which is currently being processed (red in example shown below).
Example:
<!DOCTYPE html> <html> <head> <title>Bubble Sort</title>
<meta charset="UTF-8">
<script src=
type="text/javascript"></script>
<style>
body {
padding: 0;
}
canvas {
vertical-align: top;
}
</style>
</head> <body> <script type="text/javascript">
// Set Global Variables
let values = [];
let w = 20;
// To store the state of each bar
// in order to change the color
let states = [];
function setup() {
// Create Canvas of Size Windows
// Width * Windows Height
createCanvas(800, 400);
// Insert Random values in array
values = new Array(floor(width/w));
for(let i = 0; i < values.length; i++) {
values[i] = float(random(height));
states[i] = -1;
}
// Print Unsorted Array
print("Unsorted Array:" + values);
// Call to bubble sort function
bubbleSort(values, 0, values.length);
// Print Sorted Array
print("Sorted Array:" + values);
}
// Definition of bubble sort
async function bubbleSort(arr, start, end) {
if(start >= end) {
return;
}
for(var i = 0; i < end-1; i++) {
for(var j = 0; j < end-i-1; j++) {
if(arr[j] >= arr[j+1]) {
states[j] = 1;
// Call to swap function
await swap(arr, j, j+1);
states[j+1] = 0;
}
states[j] = 2;
}
}
return arr;
}
// Definition of draw function
function draw() {
background(51);
for(let i = 0; i < values.length; i++) {
stroke(0);
fill(255);
if(states[i] == 0) {
fill(255, 0, 0);
}
else if (states[i] == 1) {
// Element currently sorting
fill("#58FA82");
}
else {
fill(255);
}
rect(i*w, height - values[i], w, values[i]);
}
}
// Definition of swap function
async function swap(arr, a, b) {
await sleep(20);
let t = arr[a];
arr[a] = arr[b];
arr[b] = t;
}
// Definition of sleep function
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
</script>
</body> </html> |
Output: