Skip to main content

Hack a new language from Facebook




Hack is a programming language for HHVM that interoperates seamlessly with PHP. Hack reconciles the fast development cycle of PHP with the discipline provided by static typing, while adding many features commonly found in other modern programming languages.

Hack provides instantaneous type checking via a local server that watches the filesystem. It typically runs in less than 200 milliseconds, making it easy to integrate into your development workflow without introducing a noticeable delay.

Hack is a programming language for the HipHop Virtual Machine (HHVM) invented by Facebook.HipHop Virtual Machine (HHVM) is a process virtual machine based on just-in-time (JIT) compilation, serving as an execution engine for PHP and Hack programming languages. By using the principle of JIT compilation, executed PHP or Hack code is first transformed into intermediate HipHop bytecode (HHBC), which is then dynamically translated into the x86-64 machine code

The basic file structure of a Hack script is similar to a PHP script with a few changes. A Hack file starts with <?hh as opposed to <?php for a PHP script:
<?hh
class MyClass {
  public function alpha(): int {
    return 1;
  }

  public function beta(): string {
    return 'hi test';
  }
}

function f(MyClass $my_inst): string {
  // Fix me!
  return $my_inst->alpha();
}


Popular posts from this blog

The possibility of quantum computing breaking encryption algorithms

The possibility of breaking encryption algorithms is a powerful motivating factor for many countries of the world. Thus, knowledge of the enemy's encryption systems could give a huge advantage in intelligence, while at the same time contributing to the conduct of new fundamental research in the field of physics, since modern experimental systems have at their disposal only less than 100 qubits.    To achieve the useful computing performance of a supercomputer, we probably need machines with hundreds of thousands of qubits. In order for the devices to function correctly, they must correct all minor random errors in the software. In a quantum computer, such errors arise due to imperfect elements of the circuit and the interaction of qubits with their environment. For these reasons, qubits can lose coherence in literally a split second. A quantum computer with 100 qubits can simultaneously represent 2100 solutions. For some tasks, this exponential parallelism can be used to create a h

How to install cloudflare wrap on linux

 command mode dumb......expert user edition   millen@TechGlyphs-Studio:~/Desktop$ wrap-cli wrap-cli: command not found millen@TechGlyphs-Studio:~/Desktop$ curl https://pkg.cloudflareclient.com/pubkey.gpg | sudo gpg --yes --dearmor --output /usr/share/keyrings/cloudflare-warp-archive-keyring.gpg Command 'curl' not found, but can be installed with: sudo snap install curl  # version 7.86.0, or sudo apt  install curl  # version 7.81.0-1ubuntu1.6 See 'snap info curl' for additional versions. [sudo] password for millen:  gpg: no valid OpenPGP data found. millen@TechGlyphs-Studio:~/Desktop$ sudo apt  install curl Reading package lists... Done Building dependency tree... Done Reading state information... Done The following packages were automatically installed and are no longer required:   chromium-codecs-ffmpeg-extra gstreamer1.0-vaapi libflashrom1 libftdi1-2   libgstreamer-plugins-bad1.0-0 Use 'sudo apt autoremove' to remove them. The following NEW packages will be in

Simple steps to protect your privacy.

  Step 1. Download DuckDuckGo on all your devices With just one download you'll get tracker blocking, private searching, increased encrypting, and privacy grading on all of your browsing. Our mobile app for iOS/Android (DuckDuckGo Privacy Browser) and browser extensions for Firefox, Chrome, and Safari (DuckDuckGo Privacy Essentials) has all of this in one seamless package. Privacy, simplified. Step 2. Update your software Your device operating systems get out-of-date over time, and old software can contain security bugs or settings that leak personal data. Set your devices (and the apps on them) them to update automatically. That way you'll always have the latest, safest versions. Step 3. Update your privacy settings Make sure your devices are using the best privacy settings. Here are step-by-step instructions for all the major device types. Especially make sure you adjust per-app location settings, so that your location history isn’t leaking where it shouldn’t. For extra bonus