title: Core Data and NSDate
body: <p>I read this <a href="https://stackoverflow.com/questions/2621179/core-data-nsdate-searching-for-unique-days-and-sorting">post</a> but I don't really understand the code... 
  I have a core data database with an Entity and some attributes. One of them is named "myDate" and has for type NSDate.
  Now I want to to display each date but eliminate dates with same day-month-year and display them ascendantly .</p>
  
  <p>Have you got an idea?</p>
  
  <p>Thanks a lot !</p>