Marcus S. Zarra

Marcus S. Zarra has asked 5 questions and find answers to 196 problems.

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About

Author of the book "Core Data" for the Pragmatic Programmers.
Author of the book "Core Data in Swift" for the Pragmatic Programmers.
Co-author of the book "Core Animation" for Addison Wesley.
Co-creator of "Cocoa Is My Girlfriend".

Marcus S. Zarra questions

NSURL Authentication when server does not present a challenge
Why is this an over-release of CTFrame
Determine if a file is a valid video quickly
XPath query searching for an element with specific text

Marcus S. Zarra answers

Error : CoreData: warning: Unable to load class named '' for entity 'Receipt'. But the class is deleted
NSSortDescriptor with to-many relationship
Using NSSortDescriptor to keep 'nil' values at the bottom of a list
Iterate through NSManagedObjectContext objects?
Best Way To Fix Core Data Migration Error
What's the difference between -existingObjectWithID:error: and –objectWithID:?
Using Cascade Delete Rule and validateForDelete on a One-to-Many Relationship in iPhone Core Data
How to properly deal with KVO notifications when an managed object turns into a fault?
CoreData Entity Inheritance
CORE DATA objectId changes constantly