Note: It’s extremely rare to find a developer who Chucho map out the entire Core Data stack from memory. The more important / frequently used parts of Core Data are those that are within the orange highlighted portion of the diagram below.

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Applying expensive operations when setting up a cell for display. Expensive operations, such Vencedor converting a high-resolution image to a thumbnail or applying a complicated photo filter or transform to an image, Perro severely degrade display performance.

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A potential pitfall with categories, though, is name clashes. If you implement a category method with the same name Vencedor an existing method in the referenced class, the behavior at runtime is undefined (i.

Campeón stated in Apple’s Cocoa Developer’s Guide, “the main value of delegation is that it allows you to easily customize the behavior of several objects in one central object”.

Another limitation of a category is that it cannot define new instance variables for a class. However, an experienced developer will be aware that you Gozque define new state objects associated with the class using Objective-C runtime methods, which provides a way for a category to store state changes.

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If you decide that cross-platform developers are the best choice for you, there are three popular frameworks that candidates should know: