Maps (Key-Value Storage, Comma-Ok Idiom & Iteration) - Go Tutorial for Beginners #10

Master Go's built-in hash table - Maps! Learn to store and retrieve data with lightning-fast key-value lookups. In this lesson, you will learn: ✓ Creating and initializing maps ✓ Accessing, adding, and updating values ✓ The comma-ok idiom for safe key access ✓ Why zero value ambiguity matters ✓ Deleting keys and iterating over maps ✓ nil vs empty maps - a critical distinction ✓ Maps with struct values ⏱️ Timestamps: 0:00 - Introduction 0:24 - Map Basics (Create, Access, Add, Update) 2:12 - Comma-Ok Idiom (Safe Access) 4:21 - Delete and Iterate 6:11 - Make and Struct Values 8:25 - Recap 8:55 - End 💻 Source Code: https://github.com/GoCelesteAI/go_maps 📝 Quick Reference: // Create a map ages := map[string]int{ "Alice": 25, "Bob": 30, } // Comma-ok idiom age, exists := ages["Carol"] if exists { fmt.Println(age) } // Delete and iterate delete(ages, "Bob") for name, age := range ages { fmt.Printf("%s: %d\n", name, age) } 📺 Full Playlist: Go Tutorial for Beginners 📺 Previous: Lesson 9 - Arrays & Slices 📺 Next: Lesson 11 - Functions 👍 Like and Subscribe for more Go tutorials! #Go #Golang #Programming #Tutorial #Maps #HashMap #LearnToCode #CodingForBeginners