This is a continuation article in bash loop wherein the previous article we have explained about for loop. In this article, we will take a look at two more bash loops namely, while and until loop.

The while loop is mostly used when you have to read the contents of the file and further process it. Reading and writing to a file are common operations when you write bash scripts. We will see how to read files using a while loop.

In Bash shell scripting, Loops are useful for automating repetitive tasks. When you have to repeat a task N number of times in your script, loops should be used. There are three types of loops supported in bash.

Think about some situations when you need to change strings in text files in your Linux hosts.

Depending on the case, you will simply change the file directly in your favorite text editor.

If you ever need to create a project around a single C++ file (or just a few C++ files) in CMake, as you might for quick test cases, you might find it tedious to write a CMakeLists.txt file by hand every time. To make this easier, I’ve written a script called cmake-project that you can use to generate an initial CMakeLists.txt for you. Similar to qmake -project, it allows you to quickly create a project around a single or just a few C++ files. In addition, it automatically adds a link to Qt Widgets when the code uses QApplication.

A few special features that come with CMake are support for many languages (like Fortran, CUDA, and Objective-C), native support from many IDEs (Qt Creator and Visual Studio XCode), many active contributors, many out-of-the-box configuration checks, use of non-recursive make for faster build times, and out-of-the-box support for Ninja for even faster build times. These features are a few of the reasons why Qt 6 switched from QMake to CMake.

Add the cmake-project script on top of all these fantastic features and you can enjoy the only feature people miss from QMake while working in CMake. In turn, your productivity will be better than ever!

In the last blog post in this series, we created a tool to make it easy to build our custom payloads and extract them. However, what if we want to test them before trying to use them? It seems like a good idea to make sure it works before you include it in an exploit. Testing it first would at least let you know that it works and reduce troubleshooting surface if the exploit fails. Today we are going to focus on building a payload tester stub in the C programming language. This will make it easy for us to copy and paste our C-style formatted payload from our build-and-extract tool. Once it’s pasted in the tester stub, just compile and run it and you will be able to see your payload in action. The code for payload tester stub and Makefile can be found in the /utils/ folder of the Secure Ideas Professionally Evil x86_asm GitHub repository.

In this episode of our Developer Diaries series, JJ & Chris do a bit of pair programming to show how developers can use Instana for observability-driven development.

I release SPVM 0.9014. Latest releases have some big changes.

add class, method, static keyword, omit SPVM:: namespace, and remove sub, self, keyword.

In this tutorial, you'll learn how to unit test code that performs HTTP requests. In other words, you'll see the art of API unit testing in Python.

Unit tests are meant to test a single unit of behavior. In testing, a well-known rule of thumb is to isolate code that reaches external dependencies.

For instance, when testing a code that performs HTTP requests, it's recommended to replace the real call with a fake call during test time. This way, you can unit test it without performing a real HTTP request every time you run the test.

Want to learn more about developing applications with Quarkus? Download our free ebook Quarkus for Spring Developers, which helps Java developers familiar with Spring make a quick and easy transition.

The tools available in the Spring ecosystem make it easy to get started with building applications. However, the same is true for Quarkus, which has many additional features and capabilities aimed at improving the developer experience. A Spring developer can quickly get started working with a Quarkus project and immediately become more productive, as we'll see in this article. Plug-ins and tooling are available for most major IDEs, including VSCode, IntelliJ, and Eclipse.

With the m68k community continuing to be active around supporting the vintage Motorola 68000 series with modern open-source software, Rust has now merged support for these old processors.

With the forthcoming LLVM/Clang 13 release adding an M68k back-end, Rust that leverages LLVM is now adding support for the Motorola 68000 series processors.

Daniel Sockwell had a very busy week, asking all sorts of questions (1) (2), looking to improve the documentation on list assignments and soliciting feedback about that. And Daniel also published a blog post about the concept of labelling your code, in which they posit that “Comments are prose; labels are identifiers” (which resulted in quite a discussion on /r/rakulang). Thought provoking stuff!

An ordinary vector encountered in C++ programming, is a vector of objects of the same type. These objects can be fundamental objects or objects instantiated from a class. This article illustrates examples of vector of pointers, to same object type. To use a C++ vector, the program has to include the vector library, with a directive.

All the vector code for this article is in the main() function, unless otherwise indicated. Vector of pointers to different types, is however, addressed at the end of the article. In order to appreciate vector-of-pointers, it is good to recall the knowledge for vector of objects.

A string object instantiated from the string class is a list data structure. The list is a series of characters, and it is appreciated as such. The C++ string object has many methods. However, it lacks certain operations, which are best offered if it is seen as a stream.

Once you learn how to code, you can start building great applications that solve a problem or join businesses and companies looking for those with stellar coding skills. An important tool you will need is a code editor. Code editors come with various features that make it easy to code, create great applications, debug code, deploy code and so much more. Today, we are going to focus on five of the best code editors for Linux users. Keeping with the theme of Linux, the code editors below are free, open-source, or both.

A lot of times, people ask what’s Ruby good for apart from Rails. Ruby is great for various tasks from several different domains, and today, I would like to share how anybody can use Ruby in publishing ebooks.

Since I used some Ruby tasks in publishing my first-ever ebook Deployment from Scratch, it crossed my mind to write down why I think Ruby is great for publishing ebooks.

Join online as the community meets on November 3. Qt World Summit gathers together more than 5 000 developers, designers, managers and executives from over 90 countries around the world.

I asked on twitter what people feel was easier to learn 15 years ago. One example a lot of people mentioned was the command line.

I was initially a bit surprised by this, but when I thought about it makes sense – if you were a web developer 15 years ago, it’s more likely that you’d be asked to set up a Linux server. That means installing packages, editing config files, and all kinds of things that would get you fluent at the command line. But today a lot of that is abstracted away and not as big a part of people’s jobs. For example if your site is running on Heroku, you barely have to know that there’s a server there at all.

I think this applies to a lot more things than the command line – networking is more abstracted away than it used to be too! In a lot of web frameworks, you just set up some routes and functions to handle those routes, and you’re done!

Abstractions are great, but they’re also leaky, and to do great work you sometimes need to learn about what lives underneath the abstraction.

MariaDB released the technical preview of the NoSQL listener capability to define a port and protocol pair that accept client connections to a service.

“We’ve opened up a port on MaxScale to listen for traffic that contains NoSQL data that we then store and manage in a MariaDB database,” Rob Hedgpeth, Director, Developer Relations at MariaDB, wrote in a blog post.

When the MongoDB client application issues MongoDB protocol commands, either directly or indirectly via the client library, they are transparently converted into the equivalent SQL and executed against the MariaDB backend. The MariaDB responses are then in turn converted into the format expected by the MongoDB client library and application.

If you were to look at the features in Java 17, the most recent long-term support (LTS) release from Oracle, you’d probably be disappointed. There’s only 14 JDK enhancement proposals (JEP) included in the release, and none of them are particularly exciting. In fact, some of the JEPs are downright depressing, such as the deprecation of the Applet API for removal or the removal of the experimental AOT and JIT compilers.

There are no ‘big bang’ JDK releases anymore. In the past, there would be a highly anticipated feature such as Java modules or Lambda expressions that would delay a release until the feature was complete. The Java world doesn’t work like that anymore. Releases now happen every six months. If a feature is complete, it goes into the release. If not, it gets targeted to the next release. But a new release happens every six months, and feature enhancements happen incrementally over time. So if you want to know what’s new in the latest LTS release, you really need to look over the various changes that were made and enhancements that were added between Java 11 and 17. Starting with Java 12, here is a list of them:

Despite its name, the Rust programming language has never looked so shiny and new. Way back in 2016, Stack Overflow’s annual survey of developers crowned Rust the “most loved” programming language. They voted their love again in 2017, 2018, 2019, 2020, and 2021. Presumably, when 2022 rolls around, that devotion to Rust will persist.