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Cocoa Programming for OS X: The Big Nerd Ranch Guide
book

Cocoa Programming for OS X: The Big Nerd Ranch Guide

by Aaron Hillegass, Adam Preble, Nate Chandler
April 2015
Intermediate to advanced
556 pages
17h 47m
English
Big Nerd Ranch Guides
Content preview from Cocoa Programming for OS X: The Big Nerd Ranch Guide

Challenge: Improve Error Handling

Add error handling to courseFromDictionary(_:) (as discussed in the section called “Safely Working with Untyped Data Structures” ) such that it returns nil if any of the fields or structure are not as expected. Test the failure modes by changing the key strings in the code.

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Publisher Resources

ISBN: 9780134077130Purchase book