C# - Developer Support

Dissecting the pattern matching in C# 7

October 16, 2017 Oct 16, 2017 10/16/17

Sergey Tepliakov

C# 7 finally introduced a long-awaited feature called "pattern matching". If you're familiar with functional languages like F# you may be slightly disappointed with this feature in its current state, but even today it can simplify your code in a variety of different scenarios. Every new feature is fraught with danger for a developer working...

Dissecting the local functions in C# 7

October 3, 2017 Oct 3, 2017 10/3/17

Sergey Tepliakov

The Local functions is a new feature in C# 7 that allows defining a function inside another function. When to use a local function? The main idea of local functions is very similar to anonymous methods: in some cases creating a named function is too expensive in terms of cognitive load on a reader. Sometimes the functionality is inherently ...

A common execution path optimization

February 21, 2017 Feb 21, 2017 02/21/17

Sergey Tepliakov

Today I want to talk about one interesting optimization pattern that you may face in framework code or in high-performance libraries. The idea is simple: suppose you have a commonly used method that has two execution paths – one is very common and simple, and the second one takes longer to execute, has more steps but happens not that ...

Dissecting the new() constraint in C#: a perfect example of a leaky abstraction

February 1, 2017 Feb 1, 2017 02/1/17

Sergey Tepliakov

Most likely you’ve heard about The Law of Leaky Abstractions coined by Joel Spolsky. Even if you never heard of it, you definitely faced it in your day-to-day job. The “law” is pretty simple: “All non-trivial abstractions, to some degree, are leaky”. And this is 100% true. But sometimes even not that complicated abstractions can leak...