Bubble sort using TypeScript
Bubble sort is considered the simplest sorting algorithm to implement. We’ll approach the problem in two ways. Once using a set number of iterations, and next using an idiomatic approach.
We’ll be covering this problem using TypeScript / Javascript
I was wondering if you could help me understand how the swap line works.
[array[j], array[j + 1]] = [array[j + 1], array[j]];Instead of swapping, it looks like the line is setting a new two item array to another new two item array.
@brent, if you see the the array[j] and array[j + 1] are indexes in the array and we are just swapping the values at the index.
@Basarat, how does the code get out of while (true) loop in the Idiomatic implementation?
@Basarat, never mind I got it. Didn't realize the flag set was inside the while loop.
@Basarat: I created arrays of 10K and 50K random integers. I sorted the same array in nodejs using both bubble sort examples. The idiomatic example performs slower that the basic sort example. Is that expected?
##############################################
# #
***** bubble sort *****
# #
##############################################
bubbleSortProcessing-[10000]: 4758.006ms
earlyTerminationBubbleSortProcessing-[10000]: 4994.364ms
[nodemon] clean exit - waiting for changes before restart
[nodemon] restarting due to changes...
[nodemon] starting `node ./index.js`
##############################################
# #
***** bubble sort *****
# #
##############################################
bubbleSortProcessing-[50000]: 119734.447ms
earlyTerminationBubbleSortProcessing-[50000]: 125780.788ms
[nodemon] clean exit - waiting for changes before restart
I did notice a performance gain with Idiomatic sort using smaller data sets.
##############################################
# #
***** bubble sort *****
# #
##############################################
bubbleSortProcessing-[500]: 16.692ms
earlyTerminationBubbleSortProcessing-[500]: 12.605ms
[nodemon] clean exit - waiting for changes before restart
I was wondering if you could help me understand how the swap line works.
[array[j], array[j + 1]] = [array[j + 1], array[j]];Instead of swapping, it looks like the line is setting a new two item array to another new two item array.
^ For anyone wondering about this too, check out this SO answer https://stackoverflow.com/questions/872310/javascript-swap-array-elements
This is using array destructuring to swap elements. I'd seen it with variables, but not on arrays like this before.