## DEV Community

Yigal Ziskand

Posted on • Updated on

# Bubble Sort (3 min recap)

## Motivation

It's shiny benefit is it's implementation simplicity, but be aware (it comes with a heavy price) it should not be applied on large datasets since its performance is O(n)^2 which is quite... terrible...

## Basic Idea

The basic idea is very simple - we should go over each item in our collection by comparing the current item with its right closes neighbor.
In case we find that the left item is bigger then right one [left > right] - we simply switch their places and continue to the next neighbors.

This way we make sure that the biggest number is always BUBBLED UP to the most right place.
If we continue this procedure for each item in the collection then we can claim that we have incrementally sorted collection of items

## Pseudo Code

``````done = false
while !done
done = true
for i = 0 .. items.length
if items[i] > items[i + 1]
swap(a[i], a[i + 1])
done = false
``````

## Code Snippet

``````  let dataSet = [1, 6, 2, 3, 4, 5, 7];

const bubbleSort = () => {
let done = false;
while (!done) {
done = true;

for (let i = 0; i < dataSet.length; i++) {
if (dataSet[i] && dataSet[i + 1] && dataSet[i] > dataSet[i + 1]) {
[dataSet[i], dataSet[i + 1]] = [dataSet[i + 1], dataSet[i]];

done = false;
}
}
}
};
``````

## Example

Since Svelte compiler allows us to write almost identical to standard JS - i have sketched a simple example of the algorithm triggered by a button click.
BubbleSort (Svelte REPL)

## Top comments (2)

Ashique

This is a nice little example of bubble sort for beginners.

Yigal Ziskand • Edited

yep, its just a short recap of the algorithm (3 min target)