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

Published February 18, 2015 by Xojo

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

Published February 9, 2015 by Xojo

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

Published January 14, 2015 by Norman Palardy

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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Oh, Say Can You C?

Published December 18, 2014 by Norman Palardy

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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Guest Post: Managing Database Schema Control Over Multiple Versions

Published December 6, 2014 by Xojo

Wayne Golding has been a Xojo developer since 2005. He operates two IT companies, a Network/Systems services co & DRNine11 an offsite backup & DR co. Though he primarily uses Xojo for internal management systems and utilities, Wayne’s hobby is robotics where he uses Xojo to communicate with Arduino devices.

When distributing applications with a database component you will undoubtedly upgrade your database schema as your application matures. So how do you manage the schema within your application?

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Shadowing: You can’t always get what you want (or expect)

Published November 19, 2014 by Norman Palardy

Shadowing is when a subclass defines a constant, property or enumeration (almost anything that is not an event or a method) that has the same name as a constant, property or enumeration (but not an event or a method) in the superclass. Generally the best rule is avoid using the same names for constants, properties and enumerations that the superclass has already used.

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It’s 10 o’clock. Do you know where your time zone is ?

Published November 14, 2014 by Norman Palardy

If you’ve worked with times and dates you know how much fun they can be especially when you deal with different time zones, differing Daylight savings time rules, if they observe DST and all the other intricacies tracking dates and times bring up.

And very often you need to save data to a database. So how do you store the data in your database so you can properly deal with it? And does your chosen database make that easy?

Continue readingIt’s 10 o’clock. Do you know where your time zone is ?
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