Solve real coding problems
Articles about working with sets in C# (primarily using the HashSet class), such as adding items, looking up items, and doing set operations (union, intersect, etc…).
When you have a collection of elements that you’re continuing to add to, and need to keep the objects in sorted order at all times, you can use SortedSet. Internally, it uses a tree data structure to keep elements in sorted order (O(log n) insertion). This is far more efficient than repeatedly sorting a list … Read more
Let’s say you have a list of HTTP status codes that you read in when the service starts up (perhaps from appsettings.json or from the database). Whenever you send an HTTP request, you want to check if the returned status code is in this list of status code. To make things more efficient, you want … Read more
You can use Linq methods to do set operations (intersection, union, difference, and symmetric difference). These work on any type that implements IEnumerable – such as lists, arrays, and sets. I’ll explain these set operations and show how to do them with Linq methods. Set intersection with Intersect() The intersection of set A {1,2} and … Read more
