c# - Define: What is a HashSet? - Stack Overflow
Dec 30, 2010 · HashSet is an unordered collection containing unique elements. It has the standard collection operations Add, Remove, Contains, but since it uses a hash-based …
How can `HashSet<T>.Contains` be O(1) with this implementation?
Okay, so how "search complexity in hashset is O (1)"? It's not. The worst case complexity is proportional to the number of items. It's O (1) on average.2 If all objects fall to the same …
Concurrent HashSet<T> in .NET Framework? - Stack Overflow
Your implementation is correct. The .NET Framework does not provide a built-in concurrent hashset type, unfortunately. However, there are some workarounds. ConcurrentDictionary …
What is the difference between HashSet<T> and List<T>?
Jun 18, 2011 · A HashSet<T> is a class designed to give you O(1) lookup for containment (i.e., does this collection contain a particular object, and tell me the answer fast). A List<T> is a …
.net - HashSet vs. List performance - Stack Overflow
It's clear that a search performance of the generic HashSet<T> class is higher than of the generic List<T> class. Just compare the hash-based key with the linear approach in the …
How does HashSet compare elements for equality? - Stack Overflow
Jan 21, 2012 · How does HashSet compare elements for equality? Asked 13 years, 9 months ago Modified 1 year, 5 months ago Viewed 136k times
What's the difference between HashSet and Set? - Stack Overflow
Apr 16, 2016 · 1 HashSet is a class derived from Set interface. As a derived class of Set, the HashSet attains the properties of Set. Important and the most frequently used derived classes …
Collection that allows only unique items in .NET?
The HashSet<T> class provides high-performance set operations. A set is a collection that contains no duplicate elements, and whose elements are in no particular order.
Difference between HashSet and HashMap? - Stack Overflow
Apart from the fact that HashSet does not allow duplicate values, what is the difference between HashMap and HashSet in their implementation? It's a little bit vague because both use hash …
c# - Make HashSet<string> case-insensitive - Stack Overflow
The HashSet<T> constructor has an overload that lets you pass in a custom IEqualityComparer<string>. There are a few of these defined for you already in the static …