Dec 29, 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 implementation, these …

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 tables to...

Apr 16, 2016 · Saw the code snippet like Set<Record> instances = new HashSet<Record> (); I am wondering if Hashset is a special kind of set. Any difference between them?

It's clear that a search performance of the generic HashSet&lt;T&gt; class is higher than of the generic List&lt;T&gt; class. Just compare the hash-based key with the linear approach in the List&lt...

Jan 11, 2010 · Yes I sometimes forget that contrary to other collections the HashSet, HashMap have a different constructor: "Constructs a new, empty set; the backing HashMap instance has the specified …

Aug 8, 2009 · HashSet<T> is a data strucutre in the .NET framework that is a capable of representing a mathematical set as an object. In this case, it uses hash codes (the GetHashCode result of each …

Here is a great example: How to implement ConcurrentHashSet in .Net The only drawback of this solution is that the type HashSet<T> doesn't officially concurrent access, even for reading …

Jun 17, 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 class designed to …

Aug 27, 2013 · Possible Duplicate: How does Java hashmap work? Can someone explain to me how HashSets in java work and why they are faster than using ArrayLists?

Switching to the difference between HashSet and LinkedHashSet, please note that LinkedHashSet is a subclass of HashSet. They are not sorted sets. HashSet is the fastest implementation of a set and it …