Learning – Page 50 – Xojo Programming Blog

Programming Resources For Students

Published June 15, 2015 by Alyssa Foley

Can I learn to code in Xojo for free? Yes, Xojo is free for development and testing!

Do you have a free book so I can learn to code? Yes, Intro to Programming with Xojo is free!

Can I ask my beginner questions? Yes, the Xojo forum is a gateway to the friendly and helpful Xojo community.

The Xojo language is Object-Oriented. Object-Oriented programming is an excellent way to learn the fundamentals of computer programming. Xojo is also cross-platform, which means you can build apps for all kinds of platforms using a single code base. Xojo is a Rapid Application Development tool, which means it’s developed to make building apps simple and quick.

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Your Anti-Virus Software and Xojo

Published June 11, 2015 by Jason Parsley

UPDATE 12/2024

Though increasingly rare, we do still hear from Xojo users who get false positives from their anti-virus software when downloading Xojo or running Xojo applications. We’ve even heard of this occurring when users are debugging apps from the IDE. To get around this, you can refer to the documentation for your anti-virus software on how to exclude Xojo from scans. To fix these issues for yourself and future Xojo users, we ask that you report these occurrences to your anti-virus software makers.

If you are on Windows, you may also be interested in Avoiding False-Positive Virus Detection in Windows Apps

We’ve occasionally heard from Xojo users that their anti-virus software gives them a warning about Xojo. All of these have been false positives and we ask that you report these to your virus software makers if it happens to you.

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Casting about in both 32 and 64 bit worlds

Published June 8, 2015 by Norman Palardy

Consider the following code:

dim i64 as Int64 = 1234567
dim i32 as int32 = 7654321

i32 = Int32(i64) // cast
i64 = Int64(i32) // cast

i32 = Ctype(i64, Int32) // convert
i64 = Ctype(i32, Int64) // convert

It all seems reasonable enough. Not useful, but seems reasonable. Only one problem. It won’t compile. Why not? The two casts to int32 and int64 will fail. Now why is that?

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Operator_Lookup and ParamArray

Published May 15, 2015 by William Yu

Operator_Lookup and ParamArray are two language features that have been in Xojo for a while now, but most probably don’t know why they were originally added. The need grew out from having to support COM on Windows.

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What is Raspberry Pi?

Published May 14, 2015 by Paul Lefebvre

The announcement at XDC 2015 of upcoming Xojo support for Raspberry Pi was greeted with enthusiastic applause. But after the keynote, I had several people come up to me and admit that they did not know what this Raspberry Pi is, so I thought I’d take a moment to give some background.

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HTTPSocket, now with support for HTTP 1.1

Published May 6, 2015 by Paul Lefebvre

With Xojo 2015 Release 2, most of the new Xojo framework is available for all project types. This includes Xojo.Net.HTTPSocket, which adds support for HTTP 1.1.

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Xojo Framework: Working with JSON

Published April 16, 2015 by Paul Lefebvre

Much of the new Xojo framework is available for all project types staring with Xojo 2015r2. The Data namespace includes two methods for dealing with JSON data: GenerateJSON and ParseJSON. This is how they are used in comparison to JSONItem in the old “Classic” framework.

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Using Using

Published April 15, 2015 by Paul Lefebvre

With Xojo 2015 Release 2, much of the new Xojo framework is now available for use in all project types. Because the new Xojo framework uses namespaces, you might want to take advantage of the Using command to help make your code easier to read and write.

But first, a brief aside about namespaces. The Xojo framework uses namespaces to provide better grouping of related features and to allow for classes with the same name to co-exist (Xojo.Core.Dictionary and Dictionary, for example). In fact, you can mix classic framework code and Xojo framework code together in the same method!

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Guest Post: Serial Communications with Xojo

Published March 23, 2015 by Xojo

Wayne Golding has been a Xojo developer since 2005. He operates an IT Company Axis Direct Ltd www.axisdirect.nz which primarily develops applications using Xojo that integrate with Xero www.xero.com. Wayneâs hobby is robotics where he uses Xojo to build applications for his Pi2 often implementing IoT for remote control.

When receiving data from remote sources there are two options available, one option is where the source will send a packet size followed by the data, the other is where the packet is terminated. Today we’re going to look at the terminated version.

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But it said DataAvailable…

Published March 17, 2015 by Norman Palardy

But it said DataAvailable…where is all my data?

I’ve seen this a few times and have made the mistake once or twice myself. You write some code with TCP sockets and rely on the DataAvailable event as if it means “all your data is here”.

But it’s not. So the code you wrote that parses the data into its components keels over because you only have part of what you were expecting to have. And so you ask: “Why isn’t all my data here”?

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Category: Learning

UPDATE 12/2024