Bubble sorts are usually the best way to start learning about sorting algorithms. There are more efficient sorts available such as an insertion sort or a merge sort. They compare adjacent items in a list and swap them if they are not in the right order. As soon as the list is sorted, the algorithm stops running.īubble sorts are a simple way to sort a list.
This algorithm is more efficient because it does not perform any unnecessary comparisons. Var sortedList = sortItems(numbersToSort) Is 9 greater than 12? No, so nothing happens.Īfter this iteration, our list looks like this: Is 9 greater than 2? Yes, so the items swap. Is 3 greater than 9? No, so nothing happens. In the next iteration, our program makes the following comparisons: It will continue to do so until we order every item. Our algorithm has iterated through the list once. Our list is now starting to look more ordered. 12 is greater than 2, so these items swap: This process continues until we compare every item in the list.ĩ is not greater than 12, so these items stay in the same place. Otherwise, the items stay in the same place.ĩ is greater than 3 so the positions of the first two elements swap: If the first number is greater than the second number, we swap the items. To start our sort, we will compare the first and second numbers. We’ll begin by talking about how bubble sorts work, and then we will implement one in JavaScript. Optimized bubble sorts stop executing after an iteration has finished if no swapping has occurred. Regular bubble sorts make all possible comparisons irrespective of whether an array is sorted. There are two types of bubble sorts: regular and optimized. Bubble sorts work in both ascending or descending order. Another way of thinking about this is that the largest values “bubble up” at the end of the list. The bubble sort got its name because it loops through a list and moves all the largest values to the end. Otherwise, the element remains in the same place. If an element is not in the right order, we swap the element with the one before. , and you consent to receive offers and opportunities from Career Karma by telephone, text message, and email.Ī bubble sort, or a “sinking sort,” is a simple sorting algorithm that compares a pair of adjacent elements in a list.
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