Bubble sort using TypeScript

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.