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I have TextView and I want to show player rank like Your Rank Is 6th

There is a collection that has 8 documents, Inside every document has field named player_name and player_score.

1. player_name = Liam , player_score = 14
2. player_name = Noah , player_score = 72
3. player_name = Oliver , player_score = 18
4. player_name = Elijah , player_score = 139
5. player_name = William , player_score = 419
6. player_name = James , player_score = 832
7. player_name = Benjamin , player_score = 1932
8. player_name = Lucas , player_score = 6

Let us suppose I signed in by James account, So the TextView should show me this result after using OrderBy Descending on Firestore -> Your Rank Is 2nd

How can I do it?

Note 1 : Is that will cost me 1800 reads in my quota because in fact I have more than 1800 documents not 8?

Note 2 : Every document name is player id

I have the following statement in my python code, how can I access the value (Warner Bros) of key "string" :

I need to perform a ZOH discretization of a continuous LTI state-space model in OpenModelica (OMEdit). I tried two ways of doing this:

1. using matrix exponential (Matrices.exp function) for calculating discretized A matrix (A_d) and subsequent calculation of discretized B matrix (B_d) following equation: B_d = A^-1 (A_d - I) B, where I is identity matrix; This algebraic equation can be solved either by direct calculation of matrix inversion (Matrices.inv function) or, more efficiently, by solving for B_d matrix using Matrices.solve2 function: Bd = Matrices.solve2(A,(Ad-identity(2))), thus avoiding calculation of matrix inversion. However, in both cases A matrix must be invertible, what generally (and very often) doesn't hold.
2. using Matrices.integralExp function which should return both discretized matrices (A_d, B_d) and should work for general matrix A, whether invertible or singular; However, this function does not work for me - it returns error message: "No viable alternative near token: (".

I attach code for both methods for demonstration purpose. The state space model represents a very simple second-order system of linearized pendulum with length 1 m, mass 1 kg and gravitational acceleration 9.81 m/s². Sampling time for discretization is 0.1 s. The first code works fine (A is invertible in this particular case) but the second code doesn't. Does anybody know what am I doing wrong? I'd be grateful for any advice.

method #1:

So, I have a dataset that looks like this:

I want to add a column that adds a factor variable of Red or Blue called "Winner_Colour".

I'm looking for a way for the code to look at the first letter of column 1 and 2, then look at Winner and create a new column "Winner_Colour" that has Red if the winner belongs to R_fighter or Blue if the winner belongs to B_fighter I have a feeling it might involve an if-statement and a ```mutate()`` function but I don't know where to start.

my Problem is fairly simple: I got 3 Methods:

• export function F_SetupDatabase(_logger: any): void
• export function Q_RunQuery(query: string, db: "session" | "global"): any
• export function Q_RunQueryWithParams(query: string, params: string[], db: "session" | "global"): any

To Access a Database File (SQLite3). ( Call order: F_SetupDatabase(..) -> Q_RunQuery(...) )

F_SetupDatabase(...) is used to open a Database File global-database.db and create another in-Memory Database session. My main Problem is, that in my App's Main Function, the logs from Q_RunQuery show up before F_SetupDatabase. And Query's also won't work and always return undefined. So i guess it has something to do with async/sync calls or something like that. I tried to avoid async calls/methods completley 'cause i lack the experience and always hang up myself with these. SQL Querys are correct.

Full Source Code of database.ts

I am getting an error in R when running the cv.glmnet function that I can't trace. Research only hinted me to the approx() function that throws the error when searching for lambda but I am not familiar enough with glmnet to figure out how it connects.

The error is: "need at least two non-NA values to interpolate"

While the solution seems obvious, I am working with simulated data, so definitely no NAs in there. I double-checked multiple times. I also dropped columns with constant variables in one attempt but didn't help either.

Reproducible example is a bit messy due to the complexity of the data (and also not minimal since the error doesn't occur in small example data) but please see below:

i have a table like that:

I am trying to implement a Rest API to send any type of email (with or without attachments) using SMTP connector. I want the system-email API to get the email content dynamically from a request body.

In my client application I am constructing the json structure as below.

You can see in the following code snippet that I had to manually type all possible string options for GIF. But I guess there must be a better way to achieve this. Anybody can help me with this?