Donny Wals is a passionate, curious, and fairly young developer from Netherlands. Ever since he started his communications and multimedia design studies in Amsterdam, he knew that he didn’t just want to build great websites and apps, but also transfer knowledge to his peers and newcomers. Needless to say he got involved with coaching, mentoring, and assisting in his freshman year.
During his final two years at college, he’s been a teacher in web development and spent most of his free time exploring iOS and Objective-C. When Swift was first announced, it didn’t take long for him to start playing around with it, and after just a few months of learning and experimenting Donny became the lead iOS developer for the start-up where he’d been working.
As an active member of the iOS-developers Slack community, Donny is always up for helping out people with their code and sharing his own knowledge with his peers.
Even though it might be very cliché, I would like to thank my girlfriend Dorien for putting up with me while working on this book. Writing this book took nearly every hour of free time I had, even while we were moving into our new place. She’s always been supportive of me doing this and she’s even pushed me to write more efficiently and really take my time to get everything just right. So a huge thanks goes out to her for being one of the forces that drove and inspired me to keep going no matter what. A more general thanks goes out to nearly everybody in my direct circle of friends and family; when I set out to write this book, none of them knew what it would be like to write a book. Including me. They have all been of great support during the process so a thank you goes out to them as well.