December 2014
Beginner to intermediate
240 pages
6h 54m
English
book
Learning MIT App Inventor: A Hands-On Guide to Building Your Own Android Apps
by Derek Walter, Mark Sherman
Content preview from Learning MIT App Inventor: A Hands-On Guide to Building Your Own Android Apps
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Running Off the End of the List
Lists can expand as you add more items to them, but at any time, they are finite. It is possible to ask for an item number that is beyond the end of the list (usually using the select list item block), and this generates an error that is visible to the user on the phone, such as the one in Figure 6.35. If you are connected in Live Mode, you will also see the error in App Inventor in the browser (see Figure 6.36).
Figure 6.35 A list error, as seen on the device.
Figure 6.36 A list error, as seen in App Inventor ...
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