*Note: This is a re-print from the Mac Developer Network.*
I tend to frequent the StackOverflow website and watch for questions about Core Data. Generally if it is a question I can answer I will and if it is a question I can’t answer then I really dig in for a fun session of exploration and attempt to find the answer.
When: November 2-4, 2011
Where: Los Angeles, CA
[Schedule and Additional Information](http://www.mactech.com/conference/about)
The speaker line up for MacTech this year is amazing. I am quite honored to be sharing the stage with such a group of people.
## What is MacTech Conference? ##
MacTech Conference is a 3-day, immersive, technical conference specifically designed for Apple developers, IT Pros, and Enterprise. “The whole idea of MacTech Conference is to allow members of the Apple community to meet and exchange ideas,” said Edward Marczak, Conference Chair and Executive Editor of MacTech Magazine. “This will be spurred on by presentations from some of the best and well-known experts in the community.”
MacTech Conference will have two separate tracks: one focused on programming / development, and the other on IT/Enterprise. Sessions will focus on both desktop and mobile, with appropriate levels of attention paid to the Mac, iPhone, iPad and iPod.
Core Data has many features, one of which is the Transient attribute. This type of attribute on a Core Data entity is part of a data model, but is not persisted in your Core Data persistent store. If you open up the raw SQLite store file and peek at the schema, you will not find any transient attributes. These transient attributes are still handy despite no data being persisted to the data store. One useful scenario is when a value is calculated based on other attributes. This calculation can be performed in an entity’s awakeFromFetch method, and stored at run time in this transient attribute.
One scenario I’ve been asked about on more than one occasion recently is that of temporary, or transient entities. It seems that more and more developers have a need for temporary, or transient instances of entities in your Mac or iOS apps. Having temporary object instances can be useful and necessary in certain situations. Unfortunately, Transient Entities do not technically exist within the Core Data framework, however there are simple solutions to add temporary, un-persisted, data within the context of Core Data. Let’s go over some methods to effectively use the concept of Transient, or more appropriately Temporary Entities in Core Data without direct built-in support.
When: September 11-14, 2011
Where: Denver, Colorado
[Schedule and Additional Information](http://360idev.com/)
I am very pleased to announce that I will be speaking at this year’s 360 iDev conference in Denver, Colorado. Previously it was a foregone conclusion that I would be attending this conference since it was so close to my home. However, now that I am living in California, that is no longer the case.
However, I am happy to say that I will be attending this year despite a change in my home address. The speaker line up at 360 iDev keeps getting better each year and I am happy to be a part of this [great lineup](http://360idev.com/speakers).
If you are on the fence about going to this conference then please take my advice; GO.
Not only is the speaker line up great but Denver has a great walking downtown and the after session events should be just as entertaining as the speakers themselves.
I look forward to seeing you there.