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Optional
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Nullable vs Option
Since then C# introduced nullable which takes away some of the needs for a Option type. So what is your opionion? Do libraries like Optional still have a place when nullable is enabled?
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It seems like I'm forced to make this choice at least once a day
Optional is my go-to for c# (you could also use the F# Option of course but pulling fsharp.core into a C# project tends to raise eyebrows in my experience)
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Common C practice to avoid in C++
This library provides similar functionality to F#'s Option type. I can't vouch for it, but it's there.
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Why GoLang supports null references if they are billion dollar mistake?
Not really. C# doesn't have monads but you can easily add something like https://github.com/nlkl/Optional which is great for a team familiar with option types and IMO will lead to a more productive team with a more concise code base.
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How do you handle EF Core null return values in your projects?
You can use Optional
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How to get rid of NullPointerException
The option type is a different way to represent an optional value. This type asks if a value exists and, if so, accesses the value. When trying to access the value which doesn’t exist, it raises an exception. This solves the problem of NullPointerException raised in code areas away from the bug. In Java there is the Optional class. In C# (until C# 7 ) there is the Nullable type which is only for value types but you can create your own or use a library.
Union
- Have you heard of AnyOf C# Library?
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Common C practice to avoid in C++
This is my library, Union, which provides a discriminated union implementation. In the readme, I link to another implementation.
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What annoys you about C#/.Net?
Shameless plug: Union: a C# library for discriminated unions
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F# made me do it.
So, I present Union (GitHub) (Nuget)
What are some alternatives?
language-ext - C# functional language extensions - a base class library for functional programming
csharp-learning-roadmap - A roadmap of concepts to learn to become a .NET Web Developer [Moved to: https://github.com/gridlocdev/dotnet-learning-roadmap]
JFlepp.Maybe - A Maybe type for C#, aimed as an idiomatic port of the option type in F# to C#
csharplang - The official repo for the design of the C# programming language
Curryfy - Provides strongly typed extensions methods for C# delegates to take advantages of functional programming techniques, like currying and partial application.
OneOf - Easy to use F#-like ~discriminated~ unions for C# with exhaustive compile time matching
MoreLINQ - Extensions to LINQ to Objects
dotNext - Next generation API for .NET
Optuple - .NET Standard Library for giving (bool, T) Option-like semantics
AnyOf - Use the AnyOf<TFirst, TSecond, ...> type to handle multiple defined types as input parameters or return values for methods.
NullGuard - Adds null argument checks to an assembly
FParsec.CSharp - A thin C# wrapper for FParsec.