Hello World Visual Studio Code

Tutorial

While this tutorial has content that we believe is of great benefit to our community, we have not yet tested or edited it to ensure you have an error-free learning experience. It's on our list, and we're working on it! You can help us out by using the 'report an issue' button at the bottom of the tutorial.

Create a Salesforce DX Project. In Visual Studio Code, open the Command Palette by pressing. A simple application written in F# that prints Hello, World! Download and install To start building.NET apps, download and install the.NET SDK (Software Development Kit).

Using a command prompt or terminal, create an empty folder called 'hello', navigate into it, and open VS Code ( code) in that folder (.) by entering the following commands: mkdir hello cd hello code. Note: If you're using an Anaconda distribution, be sure to use an Anaconda command prompt.
From inside this terminal we can navigate to our created directory, build, and execute the script we've written. Here we've used the following commands to compile and run the code: $ g HelloWorld.cpp -o hellowold $./hellowold. Notice that we get the expected Hello World!
The 'hello-world' code is already there;) It is time to compile and run your first C program. Go to menu Build-'Build and Run' or just press F9 and then OK, when you are asked if you want to build the project. Press F9 or go to Build-Build and Run. This is how a 'hello-world' program in C looks like.

Flutter is a new Open Source framework created by Google that focuses on the creation of cross platform applications. Flutter primarily targets iOS and Android, but is increasingly adding support for desktop platforms too.

In this article, we’re going to investigate Flutter and create our first application.

Flutter apps are built using the Dart programming language. If you’re new to Dart, you may want to start by getting a general overview of the language first.

Installing Flutter

We can install Flutter on our machine in a variety of ways. The easiest way to get started is to download the installer from the Flutter website.

Here’s the setup instructions for:

This article has been written using Flutter 1.2.x.

Plugins

I’d recommend that you either use Android Studio / IntelliJ or Visual Studio Code for your Flutter development. Android Studio offers an integrated, feature-rich IDE with support for Flutter, whereas VSCode offers more lightweight, but functional support.

Android Studio

To install the Flutter plugin for Android Studio, open up the plugin preferences using Preferences > Plugins (macOS) or File > Settings > Plugins (Windows/Linux). From there, search for the Flutter plugin within the repository list and hit install.

You can find the plugin here.

Visual Studio Code

To install the Flutter plugin for Visual Studio Code, search the store for “Flutter” or click Install from the following page.

Creating a new Flutter project

Assuming that you’ve installed Flutter and have the appropriate dependencies (Android Studio/XCode) installed, we can go ahead and create a new Flutter project.

Once again, this can be done in numerous ways, but I find the easiest ways are to do it via the Terminal or VS Code. Let’s use the terminal in this circumstance:

Launching the project

As anticipated, this will go ahead and create a new Flutter project for us and open it up inside of Visual Studio Code. We can then open this using the Flutter plugin for VS Code.

Hit the “Debug” section of the editor and click “Play” to add a new configuration.

Select “Dart & Flutter” from the dropdown and then choose the editor you’d like to use. I’ve selected the iOS Simulator for this. We should then see our demo application:

Material

We’ve created our first Flutter application and we have it running on an emulator. Let’s take a look at the code that makes this all work. Head to lib/main.dart and you should see the following starter code:

The above code snippet is part of the official Flutter codebase, and available under the following license.

This may seem a little intimidating at first. There’s lots going on. Let’s start with the MyApp widget:

MyApp

We’re firstly importing the Material package from Flutter. This is what gives our application the Material Design look and subsequent access to Material style widgets and functionality.

Then, we’re registering the MyApp widget as the main widget for our application using the runApp method.

Inside of MyApp, we’re returning a build method of type Widget which returns a MaterialApp. The MaterialApp holds metadata such as current ThemeData, the application title, the current home route, and so on.

We don’t have to use MaterialApp here, we could also use the iOS styled CupertinoApp or a custom style with WidgetsApp.

HomePage

Moving on to the HomePage, we can firstly start with the StatefulWidget. This is implemented with the use of two classes, firstly one that defines the widget:

Then, another which contains the State for that widget and the build method. If you’ve ever used React before, this is similar to the render method of JSX.

One of the more important things to consider with the above example is the fact that we’re overriding the createState method to provide our own way of managing state:

The _counter state can therefore be changed with setState(). Next, we define the build method which creates a Scaffold for our application that contains an appBar and a body.

The Scaffold class can be thought of as a top level container when using MaterialApp. This allows us to easily add navigation bars, floating action buttons, drawers, avoid notches, and much more.

Whenever we call setState(), the widget’s build method is also called, thus, updating the view/redrawing with new state. In our example, you can see that we’re making this call to setState within the FloatingActionButton via the onPressed: _incrementCounter function.

Summary

I’d now suggest that you play around with Flutter using this example application. Change the text, do some funky things with the calculations, add a new function, go wild!

Now that we’ve got our environment set up, we can start venturing further into other Flutter topics. I’d be interested in hearing what you’d like to read about!

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In the Overview of developing on Windows with Rust topic, we introduced Rust and talked about what it is and what some of its main moving parts are. In this topic, we'll set up our development environment.

We recommend that you do your Rust development on Windows. However, if you plan to locally compile and test on Linux, then developing with Rust on the Windows Subsystem for Linux (WSL) is also an option.

Install Visual Studio (recommended) or the Microsoft C++ Build Tools

On Windows, Rust requires certain C++ build tools.

You can either download the Microsoft C++ Build Tools, or (recommended) you might prefer just to install Microsoft Visual Studio.

Note

We'll be using Visual Studio Code as our integrated development environment (IDE) for Rust, and not Visual Studio. Drivers amx network & wireless cards. But you can still install Visual Studio without expense. A Community edition is available—it's free for students, open-source contributors, and individuals.

While installing Visual Studio, there are several Windows workloads that we recommend you select—.NET desktop development, Desktop development with C++, and Universal Windows Platform development. You might not think that you'll need all three, but it's likely enough that some dependency will arise where they're required that we feel it's just simpler to select all three.

New Rust projects default to using Git. So also add the individual component Git for Windows to the mix (use the search box to search for it by name).

Install Rust

Next, install Rust from the Rust website. The website detects that you're running Windows, and it offers you 64- and 32-bit installers of the rustup tool for Windows, as well as instructions on installing Rust to the Windows Subsystem for Linux (WSL).

Tip

Rust works very well on Windows; so there's no need for you to go the WSL route (unless you plan to locally compile and test on Linux). Since you have Windows, we recommend that you just run the rustup installer for 64-bit Windows. You'll then be all set to write apps for Windows using Rust.

When the Rust installer is finished, you'll be ready to program with Rust. You won't have a convenient IDE yet (we'll cover that in the next section—Install Visual Studio Code). And you're not yet set up to call Windows APIs. But you could launch a command prompt (the x64 Native Tools Command Prompt for VS, or any cmd.exe), and perhaps issue the command cargo --version. If you see a version number printed, then that confirms that Rust installed correctly.

If you're curious about the use of the cargo keyword above, Cargo is the name of the tool in the Rust development environment that manages and builds your projects (more properly, packages) and their dependencies.

And if you really do want to dive in to some programming at this point (even without the convenience of an IDE), then you could read the Hello, World! chapter of the The Rust Programming Language book on the Rust website.

Install Visual Studio Code

By using Visual Studio Code (VS Code) as your text editor/integrated development environment (IDE), you can take advantage of language services such as code completion, syntax highlighting, formatting, and debugging.

C# Hello World In Visual Studio Code

VS Code also contains a built-in terminal that enables you to issue command-line arguments (to issue commands to Cargo, for example).

First, download and install Visual Studio Code for Windows.
After you've installed VS Code, install the rust-analyzerextension. You can either install the rust-analyzer extension from the Visual Studio Marketplace, or you can open VS Code, and search for rust-analyzer in the extensions menu (Ctrl+Shift+X).
For debugging support, install the CodeLLDB extension. You can either install the CodeLLDB extension from the Visual Studio Marketplace, or you can open VS Code, and search for CodeLLDB in the extensions menu (Ctrl+Shift+X).
Setting up remote desktop services server 2019. Note
An alternative to the CodeLLDB extension for debugging support is the Microsoft C/C++ extenson. The C/C++ extension doesn't integrate as well with the IDE as CodeLLDB does. But the C/C++ extension provides superior debugging information. So you might want to have that standing by in case you need it.
You can either install the C/C++ extension from the Visual Studio Marketplace, or you can open VS Code, and search for C/C++ in the extensions menu (Ctrl+Shift+X).
If you want to open the terminal in VS Code, select View > Terminal, or alternatively use the shortcut Ctrl+` (using the backtick character). The default terminal is PowerShell.

How To Use Visual Studio Code

Hello, world! tutorial (Rust with VS Code)

Let's take Rust for a spin with a simple 'Hello, world!' app.

First, launch a command prompt (the x64 Native Tools Command Prompt for VS, or any cmd.exe), and cd to a folder where you want to keep your Rust projects.
Then ask Cargo to create a new Rust project for you with the following command. Check point network & wireless cards driver.
The argument you pass to the cargo new command is the name of the project that you want Cargo to create. Here, the project name is first_rust_project. The recommendation is that you name your Rust projects using snake case (where words are lower-case, with each space replaced by an underscore).
Cargo creates a project for you with the name that you supply. And in fact Cargo's new projects contain the source code for a very simple app that outputs a Hello, world! message, as we'll see. In addition to creating the first_rust_project project, Cargo has created a folder named first_rust_project, and has put the project's source code files in there.
So now cd into that folder, and then launch VS Code from within the context of that folder.
In VS Code's Explorer, open the src > main.rs file, which is the Rust source code file that contains your app's entry point (a function named main). Here's what it looks like.
Note
When you open the first .rs file in VS Code, you'll get a notification saying that some Rust components aren't installed, and asking whether you want to install them. Click Yes, and VS Code will install the Rust language server.
You can tell from glancing at the code in main.rs that main is a function definition, and that it prints the string 'Hello, world!'. For more details about the syntax, see Anatomy of a Rust Program on the Rust website.
Now let's try running the app under the debugger. Put a breakpoint on line 2, and click Run > Start Debugging (or press F5). There are also Debug and Run commands embedded inside the text editor.
Note
When you run an app under the debugger for the first time, you'll see a dialog box saying 'Cannot start debugging because no launch configuration has been provided'. Click OK to see a second dialog box saying 'Cargo.toml has been detected in this workspace. Would you like to generate launch configurations for its targets?'. Click Yes. Then close the launch.json file and begin debugging again.
As you can see, the debugger breaks at line 2. Press F5 to continue, and the app runs to completion. In the Terminal pane, you'll see the expected output 'Hello, world!'.

Rust for Windows