Quick Sort

Quick sort is an extremely efficient sorting technique that divides a large array of data into smaller arrays. A huge array is split into two arrays, one of which contains values less than the specified value, say pivot, on which the partition is based, and the other of which contains values larger than the pivot value.

Quicksort divides an array and then recursively calls itself twice to sort the two resulting subarrays. This approach is very efficient for huge data sets since its average and worst-case complexity are both O(n2).

Quick Sort Pivot Algorithm

Based on our understanding of partitioning in quick sort, we will now try to write an algorithm for it, which is as follows.

Quick Sort Pivot Pseudocode
The pseudocode for the above algorithm can be derived as −
function partitionFunc(left, right, pivot) leftPointer = left rightPointer = right - 1 while True do while A[++leftPointer] < pivot do //do-nothing end while while rightPointer > 0 && A[--rightPointer] > pivot do //do-nothing end while if leftPointer >= rightPointer break else swap leftPointer,rightPointer end if end while swap leftPointer,right return leftPointer end function
Quick Sort Algorithm
Using pivot algorithm recursively, we end up with smaller possible partitions. Each partition is then processed for quick sort. We define recursive algorithm for quicksort as follows −
Step 1 − Make the right-most index value pivot Step 2 − partition the array using pivot value Step 3 − quicksort left partition recursively Step 4 − quicksort right partition recursively
Quick Sort Pseudocode
To get more into it, let see the pseudocode for quick sort algorithm −
procedure quickSort(left, right) if right-left <= 0 return else pivot = A[right] partition = partitionFunc(left, right, pivot) quickSort(left,partition-1) quickSort(partition+1,right) end if end procedureStep 1 − Choose the highest index value has pivot
Step 2 − Take two variables to point left and right of the list excluding pivot
Step 3 − left points to the low index
Step 4 − right points to the high
Step 5 − while value at left is less than pivot move right
Step 6 − while value at right is greater than pivot move left
Step 7 − if both step 5 and step 6 does not match swap left and right
Step 8 − if left ≥ right, the point where they met is new pivot
0

1,983 thoughts on “Quick Sort”

  1. When I read an article on this topic, casinosite the first thought was profound and difficult, and I wondered if others could understand.. My site has a discussion board for articles and photos similar to this topic. Could you please visit me when you have time to discuss this topic?

    0
  2. SlimCrystal Reviews: Why SlimCrystal Reusable Water Bottle is the Best Choice
    for Your Lifestyle
    SlimCrystal is a unique water bottle that comes with a container of natural crystals.

    When water is poured into the bottle, it comes in contact with the crystals which then infuse the liquid with their healing properties.
    This helps you to reduce weight ; experience various other health benefits.

    SlimCrystal is a revolutionary water bottle that adds crystal energy to your drinking
    water, aiding weight loss goals by providing a natural balance to the body.Consuming 2 to 3 liters of water from
    SlimCrystal on a daily basis is believed to have numerous advantages such as aiding in weight reduction, aiding digestion, enhancing energy levels and
    boosting overall wellness.

    This review will uncover all that you need to know about SlimCrystal and how
    it currently functions. Keep reading to find out more.

    0
  3. I am curious to find out what blog system you happen to be working with?
    I’m experiencing some minor security issues with my latest blog and I would like to
    find something more safe. Do you have any suggestions?

    0
  4. Oh my goodness! Incredible article dude!
    Thank you so much, However I am encountering issues
    with your RSS. I don’t understand the reason why I can’t join it.
    Is there anybody else having similar RSS problems?
    Anyone that knows the answer will you kindly respond?
    Thanks!!alpilean weight loss reviews amazon (Timothy)

    0
  5. I love your blog.. very nice colors & theme. Did you design this website yourself or did you hire
    someone to do it for you? Plz respond as I’m looking to construct my own blog and would like to find out where u got this from.
    appreciate it

    0
  6. What i do not realize is in fact how you are no longer
    really a lot more neatly-liked than you may be now. You’re very intelligent.
    You understand thus considerably in relation to this topic, made me in my view believe it from a lot of
    various angles. Its like women and men don’t seem to be fascinated until it is one thing to do with Girl gaga!
    Your individual stuffs excellent. All the time deal with it up!

    0
  7. Hey there! This is my first comment here so I just wanted to give a quick shout out
    and tell you I genuinely enjoy reading through your blog posts.
    Can you recommend any other blogs/websites/forums that deal with the
    same topics? Appreciate it!

    0
  8. I love your blog.. very nice colors & theme. Did you design this website yourself or did you hire someone to do it for you? Plz respond as I’m looking to construct my own blog and would like to know where u got this from. thank you

    0
  9. Today, while I was at work, my cousin stole my iphone and tested to see if it can survive a thirty foot drop, just so she can be a youtube sensation. My iPad is now destroyed and she has 83 views. I know this is totally off topic but I had to share it with someone!

    0
  10. I am really impressed with your writing skills as well as with the layout on your blog.
    Is this a paid theme or did you customize it yourself?
    Either way keep up the nice quality writing, it is rare to see a nice blog like this one nowadays.

    0
  11. You are so awesome! I do not suppose I’ve read through something like that
    before. So wonderful to find another person with genuine
    thoughts on this issue. Seriously.. thanks for
    starting this up. This site is one thing that
    is needed on the web, someone with some originality!

    0
  12. Howdy very nice web site!! Man .. Excellent .. Superb .. I’ll bookmark your site and take the feeds additionallyKI’m glad to seek out so many useful info here in the post, we want develop more techniques on this regard, thank you for sharing. . . . . .

    0
  13. I simply couldn’t depart your website before suggesting that I really loved the usual info a person provide in your visitors? Is going to be back continuously in order to investigate cross-check new posts

    0
  14. I’ve read some good stuff here. Definitely worth bookmarking for revisiting. I surprise how much effort you put to make such a magnificent informative website.

    0
  15. Hi! I just wanted to ask if you ever have any trouble with hackers? My last blog (wordpress) was hacked and I ended up losing a few months of hard work due to no back up. Do you have any methods to stop hackers?

    0
  16. great put up, very informative. I ponder why the other experts of this sector don’t understand this. You should proceed your writing. I am confident, you have a huge readers’ base already!

    0
  17. I just couldn’t depart your site before suggesting that I extremely enjoyed the standard info a person provide for your visitors? Is going to be back often to check up on new posts

    0