When to use LinkedHashMap vs HashMap? | Character Frequencies Problem скачать в хорошем качестве

When to use LinkedHashMap vs HashMap? | Character Frequencies Problem

Coding Interview Question: Character Frequencies | Java LinkedHashMap Solution Mastering the *Hash Map* pattern is one of the most effective ways to ace your technical interviews. In this video, we tackle the *Character Frequencies* problem from InterviewBit, perfect for building your foundation in data structures. 📝 What You’ll Learn: *The Problem:* Given a string of lowercase characters, how do you find the frequency of each character in the exact order they first appear? *The Data Structure:* Why a standard `HashMap` might fail you in Java and how the *LinkedHashMap* solves the ordering problem effortlessly. *The Alternative Strategy:* Learn a "two-pass" approach using a regular map and a frequency reset trick—essential if you’re asked to solve this without specialized collections. *Time & Space Complexity:* Understanding how to handle input strings up to 10^5 characters efficiently. --- FREE "12 Coding Interview Patterns That Actually Get Asked" PDF 👉https://tinyurl.com/12-coding-patterns Understand interview patterns in 7 days 📂 Interview Patterns Starter Pass: https://tinyurl.com/cc-starter-pass --- *If you found this breakdown helpful, make sure to Like and Subscribe for more algorithm walk-throughs!* #CodingInterview #Java #DataStructures #Algorithm #InterviewBit #LinkedHashMap #SoftwareEngineer 0:00 - Introduction to Character Frequencies 0:51 - Problem Description & Constraints 1:21 - Example Walkthrough: Understanding "Order of Occurrence" 2:42 - Java Solution: Why LinkedHashMap is the "Perfect" Tool 3:39 - Python Behavior Note 5:17 - Bonus: How to solve it using a standard HashMap 7:14 - Outro & Next Steps