ascend | Single Cell Expression , Normalization and Differential | Genomics library

I'm new to React. I have two button for sort. But I want to change for sort both ascending and descending in one button.

I am working on a data frame df which is as below:

I have a collection where the documents are uniquely identified by a date, and I want to get the n most recent documents. My first thought was to use the date as a document ID, and then my query would sort by ID in descending order. Something like .orderBy(FieldPath.documentId, descending: true).limit(n). This does not work, because it requires an index, which can't be created because __name__ only indexes are not supported.

My next attempt was to use .limitToLast(n) with the default sort, which is documented here.

By default, Cloud Firestore retrieves all documents that satisfy the query in ascending order by document ID

According to that snippet from the docs, .limitToLast(n) should work. However, because I didn't specify a sort, it says I can't limit the results. To fix this, I tried .orderBy(FieldPath.documentId).limitToLast(n), which should be equivalent. This, for some reason, gives me an error saying I need an index. I can't create it for the same reason I couldn't create the previous one, but I don't think I should need to because they must already have an index like that in order to implement the default ordering.

Should I just give up and copy the document ID into the document as a field, so I can sort that way? I know it should be easy from an algorithms perspective to do what I'm trying to do, but I haven't been able to figure out how to do it using the API. Am I missing something?

Edit: I didn't realize this was important, but I'm using the flutterfire firestore library.

Here is the setup:

Write a query to display the student names and the maximum mark scored by them in any subject, ordered by name in ascending order. Give an alias to the maximum mark as MAX_MARK. I am not able to find the logic for this. Kindly help me with it. Do it in oracle SQL I am at beginner level in SQL.

i am currently a bit stuck in programming a PROCESSING Sketch. Lets say I have a bunch of rectangles that move up the sketch window like bubbles… They have different sizing and color… And I want to let them rotate around its own axis while they move up. I tried using pushMatrix(); and popMatrix(); – and even translate(); but I guess its a bit more complicated because i use OoP and variables in the constructor for X and Y Position of each rectangle…

This is the code to my sketch:

I want to sort a nested dict in pyhon via pandas.

I want to sort each column in react. I can do it, but forcing the code, for example if I have this array and display it in a html table, I want when I click id it sort in ascending order, when I click name it sort in ascending order and when click again it sort descending order, i want the same with name and age. And at the same time i want an arrow that if that column is in ascendig is looking up otherwise is looking down.

I was wondering if it is possible to make my colorscale bar ascending (from 1 to 4) instead of descending (from 4 to 1). Does anyone have clue? The picture of my current bar is underneath the code.