Pass around closures for deferred execution, including as parameters to other function types. Learn to write closures inline using autoclosure syntax, and understand the differences between escaping and non-escaping closures.
- I'll keep on going in the same exercise file…from the last video.…What if you want to assign a closure to a variable…or constant, to pass it around and use later?…Just admit the parentheses.…If the closure has multiple expressions in it,…you'll need to explicitly declare the type,…but a single expression closure can be assigned…without explicitly defining type.…I'll create a hello sayer constant equal to a closure…that prints "Hello, world!" and then execute that closure.…Notice that you don't write the parentheses at the end…when assigning a closure, but instead include the…parentheses when you want to execute the closure.…
Now I'll define a multi-statement random Name Getter closure…and then execute it.…I have to explicitly define its type, in this case…a function type that takes no parameters…and returns a string.…And I'll call it.…I explained earlier that a function can take…another function as a parameter.…So can a function take an inline or a stored closure…as a parameter.…I've already shown you an example of inline.…
Learn how to write code, understand Swift's key concepts and best practices, and strengthen your programming problem-solving skills. Instructor Scott Gardner teaches the fundamentals, so you'll be prepared to develop applications for iOS, macOS, and other platforms. Completing this course will enable you to not only write first-class code, but to think like a Swift developer.
- Creating playgrounds
- Defining variables and constants
- Working with characters and strings
- Working with collections and groups
- Using operators and defining custom operators
- Controlling program flow
- Defining functions and closures
- Working with classes, structures, and enumerations
- Adopting protocols
Skill Level Beginner
1. Get Started
2. Variables and Constants
3. Characters and Strings
4. Collections and Tuples
6. Control Flow
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