wanna fetch random number?

RE: wanna fetch random number?

Peter Lewis — Fri, 17 May 2024 12:48:50 GMT

Yep the todatasubset() approach that Mike posted is the more general approach to sorting, but the rank() approach from my post works in a few scenarios like this where you're sorting by numbers (and is slightly fewer lines of code) 🙂

RE: wanna fetch random number?

Mathieu Drouin — Fri, 17 May 2024 01:00:27 GMT

Peter Lewis had also posted a solution for this problem a while ago I believe

community.appian.com/.../generate-random-and-unique-numbers-for-a-specific-range

RE: wanna fetch random number?

Mike Schmitt — Thu, 16 May 2024 13:46:07 GMT

thanks! i believe someone else originally gave me the idea for the assignment of a randomized sort index to the original array - maybe you (not sure, sorry). Credit where credit is due if it were possible, but I just re-typed it in this case from memory. I think i'll save it as a tool going forward though, it seems potentially useful.

RE: wanna fetch random number?

Stefan Helzle — Thu, 16 May 2024 13:32:31 GMT

That's a nice solution :-)

RE: wanna fetch random number?

Mike Schmitt — Thu, 16 May 2024 13:05:53 GMT

step 1: generate list of possible returns (this can be an enumerated list or any other list, for the sake of flexibility)

step 2: create a "wrapper object" list where each list is assigned a random sort value

step 3: sort by the sort value, essentially randomizing the list

step 4: grab the first N results from the randomized list and return [note: paging lets us do this more easily]

a!localVariables(
  local!myValues: enumerate(100)+1,  /* can be any list */
  local!numberToReturn: 30,  /* can be whatever you want */
  
  local!sortableObjectList: a!forEach(
    local!myValues,
    a!map(
      originalIndex: fv!index,
      sortValue: rand()*10,  /* resolves as decimal between 0 and 10, for readability */
      value: fv!item
    )
  ),
  
  local!sortedPage: todatasubset(
    arrayToPage: local!sortableObjectList,
    pagingConfiguration: a!pagingInfo(
      startIndex: 1,
      batchSize: local!numberToReturn,
      sort: a!sortInfo(
        field: "sortValue",
        ascending: true()
      )
    )
  ),
  
  local!sortedPage.data.value
)

RE: wanna fetch random number?

Konduru Chaitanya — Thu, 16 May 2024 10:35:57 GMT

PreetikA15

Just replace the enumerate to 30 instead of 15. Below is the same code what Stefan has mentioned.

a!localVariables(
  local!vals: tointeger(rand(100) * 50),
  index(
    union(local!vals, local!vals),
    enumerate(30) + 1,
    null
  )
)

RE: wanna fetch random number?

venkatrea696188 — Thu, 16 May 2024 10:22:09 GMT

I think stefan got the answer for your question.

Look into this thread,

RE: wanna fetch random number?

PreetikA15 — Thu, 16 May 2024 10:19:57 GMT

thanks for your response, i want to duplicate to be removed too.

RE: wanna fetch random number?

venkatrea696188 — Thu, 16 May 2024 10:11:06 GMT

tointeger(rand(30)*100)

Sometimes it gives duplicates, you want duplicates to be removed too??