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0 followers·18 articles

hashset

#hashset·0 followers·18 articles

hashset

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blogs.stackedmind.com·May 08, 2025

May 08, 2025

Check if a String Has All Unique Characters in Java

Date: 2023-08-16 This Java tutorial explores four methods for determining if a string contains only unique characters. It covers a brute-force approach (O(n²)), a sorting method, using a HashSet (O(n)), and employing Java Streams. The tutorial anal...

D_Arya

daryatech.hashnode.dev·May 01, 2025

May 01, 2025

HashSet in C#

Generic definition HashSet is a data structure used to store a collection of unique elements. Unlike arrays or lists, the elements in a HashSet are not stored in a continuous order. When a value is added to a HashSet, it is first passed through a has...

Discuss·6 reads

Prathamesh Karatkar

Prathamesh Karatkar

prathameshkaratkar.hashnode.dev·Apr 16, 2025

Apr 16, 2025

Understanding The Java Collections Framework

What is the Java Collections Framework? The Java Collections Framework is a unified architecture for representing and manipulating collections, such as lists, sets, and maps. It provides: Interfaces: Abstract data types like List, Set, Map, and Queu...

Understanding The Java Collections Framework

Discuss·6 reads

Beniamin Lenarcik

Beniamin Lenarcik

beniaminlenarcik.pl·Mar 17, 2025

Mar 17, 2025

Jak skutecznie wyszukiwać wiele elementów w kolekcjach .NET

W dzisiejszym świecie rozproszonych systemów, mikro serwisów i różnych sposobów przechowywania danych coraz częściej musimy łączyć dane w warstwie obliczeniowej aplikacji. Do poszukiwania relacji między nimi często korzystamy z właściwości takich jak...

Jak skutecznie wyszukiwać wiele elementów w kolekcjach .NET

Discuss·76 reads

Mihai Popescu

javainterviewprep.hashnode.dev·Feb 03, 2025

Feb 03, 2025

Most Used Coding exercises

Many coding problems in interviews are variations of common problem patterns. Recognizing these patterns and their solutions can help you solve many problems efficiently. Below is a breakdown of common problem categories similar to Two Sum and their ...

Most Used Coding exercises

Discuss·5 reads

Soyulia

soyulia.hashnode.dev·Feb 02, 2025

Feb 02, 2025

[JAVA] HashSet

목표 : HashSet의 내부 동작 방식과 중복 제거 메커니즘, HashSet이 효율적인 중복 체크를 할 수 있는 이유 확인하기. 사진 출처 : 김영한의 JAVA 중급 과정 1️⃣HashSet ? Set은 중복을 허용하지 않는다. Hash는 (인덱스값=값) 인덱스만 찾으면 값을 찾을 수 있기 때문에 O(1)성능을 가진다. 하지만 9999숫자 데이터가 들어오면 9999개의 인덱스가 필요하다.메모리 낭비가 심하게 발생한다. 이를 해결하기 위해 H...

[JAVA] HashSet

Discuss·12 reads

Vaishnavi Dwivedi

Vaishnavi Dwivedi

vaishd.hashnode.dev·Nov 18, 2024

Nov 18, 2024

Java Collections Framework

Imagine you're in a busy kitchen, using different tools to prepare a meal—this is similar to the Java Collections Framework. It provides a set of classes and interfaces to store, manage, and retrieve data in your programs. Just like you have differen...

Java Collections Framework

Discuss·9 reads

Learn DSA - JAVA

Java List, Set, Map, Queue

Akash De Alwis

zencode002.hashnode.dev·Jun 30, 2024

Jun 30, 2024

Java Collections Framework

The Java Collections Framework (JCF) is an important part of Java that provides classes and interfaces to work with objects in a collection. Understanding collections is important for all undergraduate students who want to write code that is both eff...

Java Collections Framework

Discuss·32 reads

Vineeth Chivukula

Vineeth Chivukula

vineethchivukula.hashnode.dev·Jun 24, 2024

Jun 24, 2024

Understanding Java HashSet for DSA

A HashSet in Java is a part of the Java Collections Framework and provides a way to store unique elements. It is part of the java.util package and implements the Set interface. The HashSet class does not allow duplicate elements, allows at most one n...

Discuss·12 reads

Chetan Datta

chetan77.hashnode.dev·Jun 12, 2024

Jun 12, 2024

22 Java - Set

Set Properties Collection of Objects, but it does not contain duplicate value (only one 'null' value you can insert) Unlike List, Set is not an Ordered collection, means objects inside set does not follow the insertion order. Unlike List, Set cann...

22 Java - Set

Discuss·112 reads