powerless | Minimalistic/responsive ZSH prompt | Command Line Interface library

Lets take data.frame:

I am trying to delete all observations (rows) after a maximum value is reached when using group_by. In other words, I want to select only the observations equal to or less than a maximum in each group. I have a dataset similar to the below in which I want to group_by(Group1, Group2)

I have a big multithreaded system in C#, and I realized that performance was very different between two threads. Now I have designed two nearly identical threads, where one performs 4-5 times faster (And it scales up linearly if you change the amount of loops they have to run). And the difference? One clumsy condition surrounding the actual heavy code of one of them. It makes no sense to me, and I feel powerless in optimizing going forward, if such a minor detail can have such a huge impact. This was tested in Unity, and as such it could be that the result is different in other environments.

ThreadA finish time: 2.8 seconds. ThreadB finish time: 0.6 seconds.

Mind you ThreadB is the one that has a condition (Which will evaluate to true instantly on first while iteration). How can such a stupid addition to the code make the actual payload (The for loops and the number crunching) perform so much faster? Also, if I change the "delay" variable with a static "0.0" directly in the condition of ThreadB, it performs like ThreadA again. In other words: One single double, and whether it is a hardcoded value, or references a variable, makes a difference in performance of a factor of 4-5.

Never mind the actual algorithm, which is only there to make the computer crunch some numbers. I know I am comparing the same data again and again, that is besides the point.

I am no compilation nerd, and I have no way of probing how this differs in actual machine/assembler code. I just know that the difference is huge, and non sensical to me. What do I miss? I discovered this by accident, and in the future I may not have any way of knowing a given thread performs at 20% possible speed, and that one slight change could solve it.

Please. I need a nerd to make this going from pure magic to "Oh, that's why...! Now I know how to avoid it in the future...". I know compilation of C# is surrounded by layers of managed stuff, but there must be a logical reason. Right?

Here is some test code with some simple structs to support it. If anyone has the time to check if they get the same results as I, I would be happy.

I have two postgresql tables:

• services, which has a name and description, as well as a foreign key ofsted_item_id
• ofsted_items, which has an inspection column that contains a JSONB array of objects

The inspection JSONB column contains data that looks like this:

It seems to me that Apple is encouraging us to give up using UIViewController in SwiftUI, but without using view controlelrs, I feel a little bit powerless. What I would like is to be able to implement some sort of ViewModel which will emit events to View.

ViewModel:

I'm trying to figure out what's wrong but I powerless here

I just want to save entity to database using Hibernate SessionFactory but getting this No Session found exception

Hibernate version: 4.1.9.Final

Spring version: 3.2.4.RELEASE

Here's web.xml

So, I'm using PHP to try and separate a document into sections. A sample text is below.

I have been trying to match a query using the elasticsearch python client but I am unable to match it even after using escape characters and setting up some custom analyzers and mapping them. I want to search using & and its not giving any response.

Currently I am up to rewrite a simple code from Python to PHP. This code is for a request to Yandex Cloud (Speech Kit) using ProtoBuf and gRPC.

On Python (v3) everything works just fine.

Then, I want the same in PHP (7.1.23 on MacOS). I used protoc to compile Protobuf and also grpc php plugin to get Service Client.

The first complication I faced is that client's method interface is SttServiceClient->StreamingRecognize(array metadata[], array options=[]) which is rather confusing as I supposed it should accept StreamingRecognitionRequest.

The second is that I am getting an exception InvalidArgumentException: Bad metadata value given: