A collection of 3 posts
Sort own class in swift on date property
Swift arrays can be easily sorted with the function sort(<#isOrderedBefore: (T, T) -> Bool##(T, T) -> Bool#>). You can use closures or move it to a separate function. I prefer to move all code to a separate function as I use the sorting multiple times in my project.
Learning with Team Treehouse
There are a lot of systems which offer video courses about development, design and other IT specific topics. A good German based for example is called Video2Brain. When searching for a good introduction into Swift (other than the Apple developer documentation [https://developer.apple.com/library/ios/documentation/Swift/Conceptual/