query: Creating a New Core Data Object If It Does Not Exist, or Obtaining an Existing Object if it Does Exist with Core Data
positive_passages.docid: 21715
positive_passages.text: Querying Core Data for Specific Attributes when Creating New Objects and returning the object if it exists, or creating a new one if it does not
negative_passages.docid: 87642
negative_passages.text: How to chain method on a newly created object?
negative_passages.docid: 8738
negative_passages.text: Should a retrieval method return 'null' or throw an exception when it can't produce the return value?
negative_passages.docid: 61128
negative_passages.text: Would it be beneficial to begin using instancetype instead of id?
negative_passages.docid: 38990
negative_passages.text: Writing a new set of data to Plist instead of overwriting it
negative_passages.docid: 127018
negative_passages.text: Using the "clear" method vs. New Object
negative_passages.docid: 12656
negative_passages.text: NSFetchedResultsController with predicate ignores changes merged from different NSManagedObjectContext
negative_passages.docid: 39945
negative_passages.text: Is it possible to save a reference to a not yet existing elment in JavaScript?
negative_passages.docid: 14412
negative_passages.text: Create an empty object in JavaScript with {} or new Object()?
negative_passages.docid: 142694
negative_passages.text: What happens if NSMutableArray is modified by multiple threads at the same time? (if the objects it contains are retained elsewhere)
negative_passages.docid: 52314
negative_passages.text: Adding objects algorithm in Objective-C
negative_passages.docid: 89431
negative_passages.text: Where to place the "Core Data Stack" in a Cocoa/Cocoa Touch application
negative_passages.docid: 11951
negative_passages.text: Should I use properties or direct reference when accessing instance variables internally?
negative_passages.docid: 93401
negative_passages.text: Is it possible to delete a non-new object?
negative_passages.docid: 94610
negative_passages.text: Avoiding copy of objects with the "return" statement
negative_passages.docid: 140917
negative_passages.text: Check duplicate property values of objects in NSArray
negative_passages.docid: 29043
negative_passages.text: Why are Objective-C delegates usually given the property assign instead of retain?