Difference between HashSet and HashMap?
Apart from the fact that HashSet does not allow duplicate values, what is the difference between HashMap and HashSet? I mean implementation wise? … Read more
hashset
How to calculate the intersection of two sets? [duplicate]
This question already has answers here: Efficiently finding the intersection of a variable number of sets of strings (8 answers) Closed 1 year … Read more
How to Iterate over a Set/HashSet without an Iterator?
How can I iterate over a Set/HashSet without the following? Iterator iter = set.iterator(); while (iter.hasNext()) { System.out.println(iter.next()); } 8 Answers 8
Is there an AddRange equivalent for a HashSet in C#
With a list you can do: list.AddRange(otherCollection); There is no add range method in a HashSet. What is the best way to add … Read more
Define: What is a HashSet?
HashSet The C# HashSet data structure was introduced in the .NET Framework 3.5. A full list of the implemented members can be found … Read more
Hashset vs Treeset
I’ve always loved trees, that nice O(n*log(n)) and the tidiness of them. However, every software engineer I’ve ever known has asked me pointedly … Read more
Why there is no ConcurrentHashSet against ConcurrentHashMap
HashSet is based on HashMap. If we look at HashSet<E> implementation, everything is been managed under HashMap<E,Object>. <E> is used as a key … Read more
How to initialize HashSet values by construction?
I need to create a Set with initial values. Set<String> h = new HashSet<String>(); h.add(“a”); h.add(“b”); Is there a way to do this … Read more
Difference between HashSet and HashMap?
They are entirely different constructs. A HashMap is an implementation of Map. A Map maps keys to values. The key look up occurs using the hash. On the … Read more
HashSet vs. ArrayList
When its comes to the behavior of ArrayList and HashSet they are completely different classes. ArrayList Does not validate duplicates. get() is O(1) contains() is O(n) but you have fully control over the … Read more