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Category: Learning

Guest Post: Solving Sandboxing Issues and Improving Xojo Apps With Ohanaware’s Sandbox Kit

Sam Rowlands has been developing Xojo apps since 1997. He and his wife, Joy Sha, make up Ohanaware and they have been building award winning apps since 2008, notably Funtastic Photos, HDRtist and Shine. Sam is an active Xojo developer and he also offers App Wrapper, which simplifies the process of preparing applications for submission to the Mac App Store and deploying on web sites, in the Xojo Third Party Store.

What is the App Sandbox and why is it a chore?

The App Sandbox is a great end user security concept. The Sandbox governs what an application can and cannot do. This means that a virally infected word processor, cannot go on to infect other applications nor rampantly damage files on the users disk. It can however affect files which the user has created or opened within the word processor.

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Iterators

One feature that was added in Xojo 2014r3 that I haven’t seen much discussion about yet is iterators. In short, iterators are a way to make classes useable with the existing For Each loop feature.

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Coding To Be Lazy

I know a lot of people like to write their local variable declarations like this:

dim i, i, j as integerdim k as double, s as string, b as boolean

Personally, I don’t and the reason is not that I like typing…

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Guest Post: Learning Xojo

Bob Keeney has been an active member of the Xojo community since 2001. BKeeney Software has offered Xojo consulting work for 15 years with happy clients all around the world. Bob blogs regularly on Xojo and developer topics at www.bkeeneybriefs.com.

I think that Xojo is an amazing product. Clients love the simplicity and power of Xojo which is not found in many software development products. Part of what makes it a great product to work with is the wide array of options to learn more about the language- whether it’s for someone who’s new to programming trying to get an introduction to the language or for an experienced programmer trying to do a deep dive into the framework and what Xojo is capable of.

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Oh, Say Can You C?

There is a “bug” here, can you spot it?

dim s as string = "abc" + chrb(0) + "def"
dim c as cstring = s
if s = c then
  msgbox "Yay our software works as we expected!!!!"
else
  msgbox "BOOOOOO!!!!"
end if
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