NPM "ENOENT: no such file or directory error" when installing Sails.js dependencies with Node 8.9.4 LTS

I recently upgraded my computer and with it, to the latest LTS version of Node and NPM: - - I have a Sails.js 0.12.14 application for which I'm trying to install NPM dependencies with `npm install`...

22 Jan at 15:17

Multitenant Identity Server 4

I'm trying to implement an IdentityServer that handles an SSO for a multitenant application. Our system will have only one IdentityServer4 instance to handle the authentication of a multitentant clien...

Is floating point arithmetic stable?

I know that floating point numbers have precision and the digits after the precision is not reliable. But what if the equation used to calculate the number is the same? can I assume the outcome would...

22 Jan at 14:53

.Net Core 2.0 Authorization always returning 401

After adding `[Authorize]` to a controller, I'm always getting a 401 from it. While debugging, I see the `return AuthenticateResult.Success` being reached, but the code of the controller never is. Wha...

Path.Combine() behaviour with drive letters

According to the official documentation regarding `Path.Combine` method: [https://msdn.microsoft.com/en-us/library/fyy7a5kt(v=vs.110).aspx](https://msdn.microsoft.com/en-us/library/fyy7a5kt(v=vs.110)....

20 Jun at 09:12

Why does System.Decimal ignore checked/unchecked context

I just stumbled into a `System.Decimal` oddity once more and seek an explaination. When casting a value of type `System.Decimal` to some other type (i. e. `System.Int32`) the [checked keyword](https:...

22 Jan at 13:48

Why can constants be implicitly converted while static readonly fields cannot?

Given the below code, I wonder why `referenceValue = ConstantInt;` is valid while `referenceValue = StaticInt;` fails to compile. ``` namespace Demo { public class Class1 { private c...

22 Jan at 10:24

create react app not picking up .env files?

I am using [create react app](https://github.com/facebookincubator/create-react-app) to bootstrap my app. I have added two `.env` files `.env.development` and `.env.production` in the root. My `.env...

22 Jan at 14:46

Do binding redirects in app.config for class libraries do anything?

The VS solutions I often work with consist of a (console app, web app) and that are all referenced by the executable. When working with NuGet and installing packages, there's often an `app.config` ...

Google Colab: how to read data from my google drive?

The problem is simple: I have some data on gDrive, for example at `/projects/my_project/my_data*`. Also I have a simple notebook in gColab. So, I would like to do something like: ``` for file in g...

22 Jan at 08:23

How to use Dependency Injection in .Net core Console Application

I have to add data to my database using a Console Application. In the Main() method I added: ``` var services = new ServiceCollection(); var serviceProvider = services.BuildServiceProvider(); var con...

.NET CSV Uploader Allow Nulls

I've put together a CSV importer which I assume works, though I get this error, how do I allow this column to be null so when it adds it to the table it automatically sets the ID? I've tried: csv.Co...

6 May at 07:20

How to consume a Scoped service from a Singleton?

How should I inject (using .NET Core's built-in dependency injection library, MS.DI) a `DbContext` instance into a Singleton? In my specific case the singleton is an `IHostedService`? ### What have I...

Where is IDbSet<T> in entity core

[](https://i.stack.imgur.com/noyBE.png) ``` public abstract class RepositoryBase<T> : IRepository<T> where T : class { private ShopCoreDbContext dbContext; private readonly DbSet<T> dbSet; //...

21 Jan at 08:35

How to allow migration for a console application?

When using asp.net core and ef core, I have no problem when invoking `add-migration init`. But when I apply the same approach on a console application below, I got an error saying: > Unable to create ...

Task does not contain a definition for Run method

I tried to implement multithreading in my code, 1st time. When i tried to use ``` Task T = Task.Run(() => { }); ``` Visual Studio is still underlines Run() with statement "Task does not contain a ...

20 Jan at 20:57

How do you buffer requests using the in memory queue with ServiceStack?

Running SS 4.0.54 at the moment and what I want to accomplish is to provide clients a service where by they can send one way HTTP requests. The service itself is simple. For the message, open a DB c...

20 Jan at 19:57

ServiceStack ServerEvents authentication configuration

I'm trying to use JWT authentication with ServiceStack ServerEvents to ensure that all users are authenticated but I can't find how to configure server events to do this. I assume that this works in t...

24 Jan at 08:36

How can I implement ISerializable in .NET 4+ without violating inheritance security rules?

Background: [Noda Time](https://nodatime.org) contains many serializable structs. While I dislike binary serialization, we received many requests to support it, back in the 1.x timeline. We support it...

How to (should I) mock DocumentClient for DocumentDb unit testing?

From the new CosmosDb emulator I got sort of a repository to perform basic documentdb operations, this repository gets injected to other classes. I wanted to unit test a basic query. ``` public clas...

24 Jan at 18:27

Efficiency of very large collections; iteration and sort

I have a csv parser that reads in 15+ million rows (with many duplicates), and once parsed into structs, need to be added to a collection. Each struct has properties Key (int), A(datetime), and B(int...

19 Jan at 17:0

batch file from scheduled task returns code 2147942401

I am trying to schedule a job to run a batch file with Windows 10 Task Scheduler, but it results in return code 2147942401. The batch file is on remote location so I am giving the absolute path "\\se...

23 Jan at 11:5

Why does pattern matching on a nullable result in syntax errors?

I like to use `pattern-matching` on a `nullable int` i.e. `int?`: ``` int t = 42; object tobj = t; if (tobj is int? i) { System.Console.WriteLine($"It is a nullable int of value {i}"); } ```...

11 Apr at 16:11

Async programming and Azure functions

In the Azure functions "Performance considerations" part, [Functions Best Practices](https://learn.microsoft.com/en-us/azure/azure-functions/functions-best-practices), under "Use async code but avoid ...

8 Apr at 22:24

Return "raw" json in ASP.NET Core 2.0 Web Api

The standard way AFAIK to return data in ASP.NET Core Web Api is by using `IActionResult` and providing e.g. an `OkObject` result. This works fine with objects, but what if I have obtained a JSON stri...

19 Jan at 08:12