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Programming Leftovers

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  • Things Are Getting Rusty In Kernel Land | Hackaday

    The other answer is that Rust is an easy fit with C code and kernel programming. Rust does it’s magic in the compiler. The code you write is what actually runs, without an interpreter or garbage collection trying to be helpful. Rust hasn’t overdosed on Object Oriented patterns, but meshes nicely with the C-style structs already used in the kernel. Even the stack model is very similar to C.

    There’s one problem with Rust’s memory-safe guarantee — it’s impossible to write a kernel that is formally memory-safe. A kernel has to write to unallocated memory, do weird pointer math, and other seemingly bizarre things to actually make our computers work. This doesn’t work well with a language that tries to guarantee that memory manipulations are safe. How do you write kernel code with Rust, then? Rust has added the unsafe keyword, allowing use of direct memory access and other such techniques that don’t work with Rusts’s memory guarantees. Keep the potential problems together, and it makes auditing easier.

    There’s at least one other language that may come to mind as an incremental update to C that tries to do some of these things: C++. Surely this would have been even a better fit, right? Kernel devs have some strong feelings about that idea. To put it gently, none of the improvements in C++ are useful in the context of the kernel, and some of the other changes just get in the way.

  • How to Get User Input in Java

    In programming languages, taking the user’s input is an essential task. In Java, multiple predefined classes are used to get the user’s input such as Scanner, BufferedReader, and Console class. All these classes utilizes various methods for handling input such as nextLine(), readLine(), etc.

  • How to convert string to int in Java

    Converting one data type to other data types is a common task in the prommer’s life. If we talk about the string to int conversion it can be achieved using two build-in methods i.e., Integer.ParseInt() and Integer.ValueOf(). Usually, we perform the string to int conversion when we have to execute mathematical operations over the strings containing numeric data.

  • Array of Pairs in C++

    The term pair refers to the combination of two values of different types. Pair allows you to keep two separate objects as a single unit. It is mostly utilized when storing tuples.

    The pair container is a basic container declared in the utility header that consists of two collected data or objects. The first element in the pair container is referred to as ‘first,’ while the second element is referred to as ‘second’, with the order fixed as (first, second).

    By default, the object of a specified array is allocated in a map or hash map of the type ‘pair,’ with all of the ‘first’ elements having unique keys paired with their ‘second’ value objects. To obtain the elements, we use the variable’s name followed by the dot operator and by the first or second keywords.

  • Dart Hello World

    Dart is a Google-developed static programming language. It allows for client-side and server-side application development. As per the GitHub adoption index, it has become the most widely used programming language because it incorporates the flutter toolkit. However, the Flutter Framework is commonly utilized in developing Android applications, iOS applications, IoT (Internet of Things), and online applications. Dart has a high syntactic and semantic similarity to JavaScript, Java, CPP, and python. It is a vibrant object-oriented language with lexical scope and closure. Dart was released in 2011, but it gained prominence after 2015 with the release of Dart 2.0.

    In this article, we will look at the basic representation of Dart syntax and how to print hello world in the dart programming language. The fundamental framework of Dart programming will be demonstrated here.

More in Tux Machines

Proprietary Systems: Chromebooks, Windows, and Microsoft’s xClown

New GNU Releases and FSF Spring "Bulletin"

  • June GNU Spotlight with Amin Bandali: Twelve new GNU releases! [Ed: Much respect to Amin Bandali for stepping up and helping the FSF a lot when it needed it the most]
  • Spring "Bulletin": Verifying licenses, free software in education, and more!

    Software freedom needs our advocacy, our words and voices, and our generosity to spread. The biannual Free Software Foundation Bulletin is an item made for sharing, its articles from FSF staff and community members help facilitate the conversation about the importance of free software in daily life. It is a great tool to help people find their reason to support free software, to contribute to free software, or -- for the many who are just learning about it -- to take their next steps up the ladder to freedom.

pgAdmin 4 v6.11 Released

The pgAdmin Development Team is pleased to announce pgAdmin 4 version 6.11. This release of pgAdmin 4 includes 20 bug fixes and new features. For more details please see the release notes. pgAdmin is the leading Open Source graphical management tool for PostgreSQL. For more information, please see the website. Read more Also: PostgreSQL: Announcing the release of AgensGraph 2.12

today's leftovers

  • The Month in WordPress – June 2022 – WordPress News

    With WordPress 6.1 already in the works, a lot of updates happened during June. Here’s a summary to catch up on the ones you may have missed.

  • Join the LibreOffice Team as a Web Technology Engineer (m/f/d), 10-20h per week, remote

    To provide high quality tools for our contributors, together working on office productivity for over 200 million users around the globe, we are searching for a Web Technology Engineer (m/f/d) to start work as soon as possible.

  • Unravelling complexity in a software-defined vehicles industry | Ubuntu

    Vehicles are becoming more connected, autonomous, shared and electric (the famous CASE acronym). While customers expect new features and upgradability, the software and hardware components enabling such innovations require a different system architecture to function. This is a major change for the automotive industry as it requires new software skills, methodologies and business models. At the same time, automotive manufacturers need to adhere to complex and strict industry standards, and uphold safety-critical functions. In this post, we will focus on the different challenges the industry is facing in terms of hardware and software complexity, cybersecurity and safety. We will also discuss how Original Equipment Manufacturers (OEMs) can learn from software companies to survive this transition towards software-defined vehicles and succeed. [...] On top of this, regulations are becoming very strict, forcing OEMs to provide patches and fixes to common vulnerabilities and exposures (CVE). Taking into account the previously detailed system complexity, it is becoming increasingly necessary to move towards a software-defined holistic context. Only a software-defined approach can provide the required flexibility and scalability that allows companies to comply with regulatory requirements while providing UX updates and handling hardware complexity. Of course, cybersecurity never only relies on software. Hardware vulnerabilities can also occur and usually lead to even worse consequences. Some hardware issues can be patched via software, but usually these CVEs remain valid throughout the system’s lifetime. For example, Meltdown and Spectre, two of the most widespread hardware vulnerabilities in the world, are still present and affecting tons of devices. This means that during hardware conception, cybersecurity must be taken into account in the specifications and system architecture in order to limit these vulnerabilities.