Articles by Tag #hashmap
Browse our collection of articles on various topics related to IT technologies. Dive in and explore something new!
The Magic Behind Instant Lookups: Understanding Hashing and Java's HashMap
1. Hashing: The Core Concept Hashing is a technique used to convert a large key into a small integer...
Cache Optimization in Rust: From HashMap Surprises to 4x Image Processing Speedup
The Surprising Benchmark Imagine we have a task, me and you: a file with 10000 words in it...
When Would You Use a TreeMap Over a HashMap?
Learn when to use a TreeMap over a HashMap in Java. Understand their differences, use cases,...
Why Map Lookups Are Slower Than Object Lookups in JavaScript
Imagine this: you’re optimizing your JavaScript code and you notice something odd. You’re using a Map...
Prefix Sums Keep Breaking? This Visual Guide Fixes That
Indices, ranges, and hash maps collide during interviews. Here's how to visualize prefix sums so subarray problems feel repeatable.
Why Java hashmap uses null key and stores it in 0th index?
In Java's HashMap, a null key is stored in bucket 0 because the hashCode() method cannot be invoked...
🗺️ Go Maps Deep Dive — Part 0: Understanding the Basics
Note: Most of the details in this article apply to both the old and new Go map implementations...
Creating a hashmap from scratch in Golang
Recently I was watching this video from a Brazilian youtuber called Augusto Galego about creating a...
HashMap in java
Java HashMap Example import java.util.*; public class HashMapExample1{ public static void...
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[📝LeetCode #13] Roman to Integer
🎀 The Problem Roman numerals are represented by seven different symbols: I, V, X, L, C, D...
HashMap - Internal Working
🚀 How HashMap Works Internally in Java? 🧐 A HashMap in Java is a key-value pair data structure that...
Unfolding: LeetCode 560. Subarray Sum Equals K
A disguised medium difficulty problem in LeetCode. We must honor this as a hard one... :) Source...
Copy Linked List with random pointer
Problem tc :O(n) where n is no. of nodes in the original linked list Iterative approach: /* //...
How to Work with HashMap in Java
HashMap is a powerful data structure in Java that allows you to store and manage key-value pairs...
What is "TypedDict" in Python
Introduction In Python, dictionaries are one of the most flexible and widely used data...
Playing with HashMap<>(); in java
Today learned the intresting topic to see is HashMap Concept and play with HashMap...
Chapter II : A Dive into JavaScript HashMaps
HashMaps in JavaScript: Unlock Fast Data! Want to understand how HashMaps (or hash tables) provide...