Anonymous Functions & Closures (Factory Pattern) - Go Tutorial for Beginners #13

Master anonymous functions and closures - the key to writing flexible, stateful Go code! In this lesson, you will learn: ✓ Anonymous function literals ✓ Assigning functions to variables ✓ Immediately Invoked Function Expressions (IIFE) ✓ Closures that capture outer scope variables ✓ The classic counter pattern ✓ Factory functions that create specialized functions ✓ Real-world patterns: loggers, multipliers, adders ⏱️ Timestamps: 0:00 - Introduction 0:27 - Anonymous Function Basics 2:29 - IIFE (Immediately Invoked Functions) 4:39 - Closure Basics 6:53 - Factory Pattern 9:42 - Recap 10:12 - End 💻 Source Code: https://github.com/GoCelesteAI/go_closures 📝 Code Highlights: // Anonymous function assigned to variable greet := func(name string) { fmt.Println("Hello,", name) } greet("Alice") // IIFE - runs immediately func() { fmt.Println("I run immediately!") }() // Closure captures outer variable count := 0 increment := func() int { count++ return count } fmt.Println(increment()) // 1 fmt.Println(increment()) // 2 // Factory pattern - returns specialized functions func multiplier(factor int) func(int) int { return func(n int) int { return n * factor } } double := multiplier(2) fmt.Println(double(5)) // 10 📺 Full Playlist: Go Tutorial for Beginners 📺 Previous: Lesson 12 - Variadic Functions 📺 Next: Lesson 14 - Pointers 👍 Like and Subscribe for more Go tutorials! #Go #Golang #Programming #Tutorial #Closures #AnonymousFunctions #FactoryPattern #LearnToCode