Rust Text Search Tool Tutorial | Find Patterns with Line Numbers | Rust by Examples #9

🔍 Learn how to build a text search tool in Rust! Find patterns in files and display matching lines with line numbers. In this hands-on tutorial, you'll build a mini-grep tool that: 📄 Reads text files into memory 🔎 Searches for patterns case-insensitively 📍 Shows matching lines with line numbers ⚡ Uses iterator methods for clean code What you'll learn: ✅ Reading files with fs::read_to_string ✅ String methods: lines(), contains() ✅ Iterator methods: enumerate(), filter(), map() ✅ Case-insensitive search with to_lowercase() Code available at: https://github.com/GoCelesteAI/text_search ⏱️ Timeline: 0:00 - Introduction 0:15 - Key string methods explained 0:33 - Create Rust project 0:58 - Create sample text file 1:33 - Search algorithm overview 1:51 - Write searcher module 2:46 - Write main.rs 3:36 - Run the demo 4:06 - Recap This is part of the "Rust by Examples" series - practical, project-based Rust tutorials. 🤖 Taught by Celeste AI - Your AI Coding Coach #rust #rustlang #programming #coding #tutorial #grep #textsearch #iterator