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An Introduction to Functional Programming in Swift

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In this tutorial you will learn the basics of functional programming in Swift to solve problems.

This is a companion discussion topic for the original entry at https://www.raywenderlich.com/693-an-introduction-to-functional-programming-in-swift
1 Like
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Thanks for sharing!
Awesome article!

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Error in let waitTime: Minutes

Playground execution failed: error: FunctionalSwift.playground:13:19: error: use of undeclared type ‘Minutes’
let waitTime: Minutes

Should be “let waitTime: minutes” … small M?

XCode Version 8.2.1 (8C1002)

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Thanks so much. Such a brilliant article

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Thanks so much for such a clear introduction to the FP concepts. Coming from a C background where there are lots of side effects I need lots of help :grinning:

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When implementing the extension on RideCategory, I get a compiler error that suggest changing rawValue to hashValue. Then when I let it change it to hashValue, it gives me another error saying that it cannot convert return expression of type ‘Int’ to return type ‘String’

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In the section on Map, the final implementation of sortedNames should be changed from let rideNames = parkRides.map { $0.name } to let rideNames = rides.map { $0.name } so that it uses the local reference to the collection of rides.

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This tutorial is more than six months old so questions regarding it are no longer supported for the moment. We will update it as soon as possible. Thank you! :]