Learning Higher-Order Functions with Swift

Boost your Swift skills by adding higher-order functions to your coding. Explore the concepts behind higher-order functions like map and filter so you know when to apply each one.

Introduction

• Understanding higher-order functions
• What you should know

1. Closures and Functions

• What are closures?
• Functions are closures
• Closures and function types
• Passing closures/functions as parameters
• Type aliases for types

2. Basic Higher-Order Functions

• Higher-order functions
• Sort
• Sorted
• Foreach

3. Powerful Higher-Order Functions

• Map
• Filter
• CompactMap
• FlatMap
• Reduce
• Other higher-order functions

4. Using Higher Order Functions

• Passing functions
• Closure optimizations
• Chaining higher-order functions
• Higher-order functions on sets
• Higher-order functions on dictionaries
• Higher-order functions on strings

Conclusion

• Next steps