Using lock statement in c#

I need to use the lock construction, and edit the following methods to execute in parallel: public void Withdraw(int amountToWithdraw) { if (amountToWithdraw <= 0) { throw new ArgumentException("The amount should be greater than 0."); } if (amountToWithdraw > MaxAmountPerTransaction) { throw new ArgumentException($"The value {amountToWithdraw} exceeds transaction limit: {MaxAmountPerTransaction}."); } if (amountToWithdraw > Amount)… Read More Using lock statement in c#

May 26, 2022 MRLeave a comment

How can I use named group in C# regex switch/case?

I want to write a code that checks if it matches to a regular expression then prints matched string. I found other question Can I use regex expression in c# with switch case?, but IsMatch method only returns boolean so I couldn’t retrieve named group string. var filepath = @"path/to/file.txt"; foreach (string line File.ReadLines(filepath)) {… Read More How can I use named group in C# regex switch/case?

May 26, 2022 MRLeave a comment

How do I initialize an ILogger in a .NET 6 class library?

I’ve a class library, which is used by a console application. I now want to add a ILogger<T> via constructor injection in my class library. I came up with something like this: public class Class1 { private readonly ILogger<Class1> _logger; public Class1(ILogger<Class1> logger) { _logger = logger; } } Nevertheless I don’t know how I… Read More How do I initialize an ILogger in a .NET 6 class library?

May 25, 2022 MRLeave a comment

TS2322: Type 'string' is not assignable to type '"union" | "of" | "strings"'

TypeScript is complaining TS2322: Type ‘{ clientSecret: string; loader: string; }’ is not assignable to type ‘StripeElementsOptions’. Types of property ‘loader’ are incompatible. Type ‘string’ is not assignable to type ‘"always" | "auto" | "never"’. Where the object is defined as const options = { clientSecret: paymentIntent.clientSecret, loader: "always", } The error goes… Read More TS2322: Type 'string' is not assignable to type '"union" | "of" | "strings"'

May 22, 2022 MRLeave a comment

Generic C# Repository, service and controller design

Im learning about generics and was wondering about how a generic controller, service and ef core repo design would look like. My case: lets say an incomming post request to add Smartphone and keyboard object to smartphone and keyboard tables My repository setup is public class GenericRepository<TEntity> : IGenericRepository<TEntity> where TEntity : class, IProductGenericEntities {… Read More Generic C# Repository, service and controller design

May 20, 2022 MRLeave a comment

IWriterConfiguration.ReferenceHeaderPrefix equivalent in newer versions of CsvHelper

What is the equivalent of csvWriter.Configuration.ReferenceHeaderPrefix in the newer version of CsvHelper? Trying this csvWriter.Configuration.ReferenceHeaderPrefix = (memberType, memberName) => $"{memberName}_"; but its not let me because ReferenceHeaderPrefix has only get method after version 20.0.0 >Solution : The usual workflow is to construct an instance of the CsvConfiguration class and pass that into the constructor for… Read More IWriterConfiguration.ReferenceHeaderPrefix equivalent in newer versions of CsvHelper

May 19, 2022 MRLeave a comment

NullReferenceException when passing Arg.Any<int>() as argument using NSubstitute

I have a customer class which accepts an IDbGateway interface as a constructor parameter. I need to write a unit test CalculateWage_HourlyPayed_ReturnsCorrectWage for the class using NUnit and NSubstitute. My unit test works fine when I pass anyId. But I want to pass Arg.Any<int>() instead of anyId. At the moment my test fails because decimal… Read More NullReferenceException when passing Arg.Any<int>() as argument using NSubstitute

May 19, 2022 MRLeave a comment

Type for only subclasses of a class

If I have a base class and multiple sub classes that inherit from this base, e.g: class Message { constructor(public text: string) {} } class MessageA extends Message { msgType: string = ‘A’; constructor( public text: string, public aData: string ) { super(text); } } class MessageB extends Message { msgType: string = ‘B’; constructor(… Read More Type for only subclasses of a class

May 19, 2022 MRLeave a comment

Moq FindAsync method returns null

I’ve been trying for a few days to test a deletion method, but without success. After debugging the code I realized that the problem is in the FindAsync method returns null and this causes the test to fall into the NotFound() condition. As I’m new to the world of C#, .NET, EntityFramework, and Moq, could… Read More Moq FindAsync method returns null

May 18, 2022 MRLeave a comment

Specifying Typescript return type that implements interface with additional fields

So I have a function that returns an object which extends the FooInterface class. I want to restrict the return type to classes that implement FooInterface but also have an additional field. interface FooInterface { readonly banana: string } function doThing() : FooInterface { return { banana: ‘blah’, additionalField: ‘blah2’, // Must have } }… Read More Specifying Typescript return type that implements interface with additional fields

May 17, 2022 MRLeave a comment

Dev solutions

Solutions for development problems

Tag: readonly

Using lock statement in c#

How can I use named group in C# regex switch/case?

How do I initialize an ILogger in a .NET 6 class library?

TS2322: Type 'string' is not assignable to type '"union" | "of" | "strings"'

Generic C# Repository, service and controller design

IWriterConfiguration.ReferenceHeaderPrefix equivalent in newer versions of CsvHelper

NullReferenceException when passing Arg.Any<int>() as argument using NSubstitute

Type for only subclasses of a class

Moq FindAsync method returns null

Specifying Typescript return type that implements interface with additional fields