Shuffling / Ordering Lists

05 Mar

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Lists are data structures that are used to create and/or manipulate different sets of values/elements.

In AppyBuilder / AI, Lists can be created by converting a CSV data into a List such as below:

Some apps, such as game apps (e.g. cards) require shuffling or randomizing a list. The shuffling would require coding (sometimes complicated) to make the shuffling happen. AppyBuilder has now developed an extension that can be used both in AppyBuilder OR MIT AI to perform shuffling using only one Shuffle block as shown below!

The extension also includes Sorting block for sorting a list in ASCeding (1) or DESCending (-1) order:

Wanna reverse a list? Then use Reverse block as shown below:

Need to get rid of duplicate items? Then use RemoveDuplicates block like shown below:


Looking for .aix? Get it from AppyBuilder community HERE


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Posted by on March 5, 2017 in Uncategorized


15 responses to “Shuffling / Ordering Lists

  1. Justin Stowers

    December 16, 2017 at 11:47 pm

    When I feed a list into the sort block it doesn’t actually sort it. Am I doing something wrong? I have checked to make sure it is in fact a list.

    • Hossein Amerkashi

      December 17, 2017 at 8:03 am

      It should work. You can post screenshot of your blocks to and we’ll help you there

      • ashish

        May 6, 2018 at 4:21 am

        Hey, how do I use your extension for this

        In the CSV file (contains a single row with suppose 10 col), in my app at a click of a button how can I display the content of that row in SEQUENTIAL order. I know how to use pick a random list, but not able to do it sequentially!

  2. bombur (Christian Hoehne)

    October 25, 2017 at 4:35 am

    Hi, I would like to try your ListUtils extension, but I cannot find the download link for the .aix file on this page. Where can I find it? I also followed the link to the AppyBuilder community, I also registeredan account there, but then I am lost. Sorry for this stupid question, it is the first time for me. Please help.

  3. Germán

    April 27, 2017 at 6:14 am

    Hi Hossein, thank you for te Appy Builder, it’s a great tool!
    Do you know how to create a list of more than 50 items with the make a list mutator? There’s a point where I can’t items after the last item anymore.

  4. Rudolph Karstadt

    March 27, 2017 at 4:27 pm

    Thank you for your extension, it is very useful.
    I found a little ‘issue’. I’ve used the SortList to sort a List in a List.
    ((2 a b c d e)(1 k l m n o)(3 r s t u v)).
    I don’t know if the extension is indended for this, but it works and sort thy List by the first item. The result is a List with 3 items:
    ((1 k l m n o)(2 a b c d e)(3 r s t u v)). – OK – but the items (1 k l m n o)… are no longer Lists but Text with spaces. So the items k or l … can not seperated with the Select ListItem block.
    I have found out, that the ‘Split at Spaces’ block can convert it back to a List.(after removing the parentheses)


  5. Paolo

    March 7, 2017 at 5:04 am

    Hi Hossein, I have tested your extension “ListUtils.aix” , it works well and is very fast!
    It works fine only with string lists…
    If you use a list of numbers, for example: “1, 2, 3, 10”, it sorts them so: “1, 10, 2, 3”
    Can you create an extension for a numeric list?

    • Hossein Amerkashi

      March 7, 2017 at 7:14 am

      Paolo, Glad that you like the extension.
      Sort is string-based not numeric based. It behaves sames sorting data in Excel when you have mixed numeric / alpha data

  6. radiobip

    March 6, 2017 at 8:06 am

    Many thanks Hossein. Congratulations on the excellent work and dedication in improving our work tools. Hug!

    Carlos Alberto

    2017-03-05 22:45 GMT-03:00 Hossein Amerkashi’s Blog :

    > Hossein Amerkashi posted: “Lists are data structures that are used to > create and/or manipulate different sets of values/elements. Lists can be > created using by converting a CSV data into a List such as below: Some > apps, such as game apps (e.g. cards) require shuffling or random” >


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