Rust Word Frequency Counter with HashMap 📊 | Rust by Examples #10

📊 Build a Word Frequency Counter in Rust using HashMap! In this hands-on tutorial, you'll learn to count word occurrences in text files using Rust's powerful HashMap and Entry API. 🎯 What You'll Build: A complete word frequency counter that reads text files, counts every word, and displays the top N most common words - sorted by frequency! ✅ What You'll Learn: • HashMap for key-value counting (String keys, usize values) • The Entry API with entry().or_insert() for efficient updates • Text processing with split_whitespace() and iterators • Sorting vectors with sort_by() in descending order • Rust module organization (mod, pub, use) ⏱️ Chapters: 0:00 - Introduction 0:15 - HashMap Explained 0:33 - Create Rust Project 1:00 - Create Sample Text File 1:45 - Build the Counter Module 2:29 - Sorting by Frequency 2:47 - Add Top Words Function 3:25 - Update Main Function 4:13 - Run the Demo 4:41 - Recap: What We Learned 5:01 - Next: CSV Data Processor 💻 Source Code: https://github.com/GoCelesteAI/word_counter ═══════════════════════════════════════ 🌟 Taught by CelesteAI Making Rust Accessible for Everyone ═══════════════════════════════════════ #Rust #RustLang #Programming #HashMap #Tutorial #LearnRust #CelesteAI #RustByExamples