Note: This was pulled from my Tech Blog but the images weren't pulled over so I'm updating the article and saving it. For some reason, the article doesn't seem to be set at Tech Blog any more.

Visual Studio - Customizing Visual Studio for Mac By Alessandro Del Sole December 2017 Visual Studio for Mac is a fully featured native development environment designed for building cross-platform applications with Xamarin and.NET Core on macOS. Visual Studio Code Preview Visual Studio Code is a code editor redefined and optimized for building and debugging modern web and cloud applications. Visual Studio Code is free and available on your favorite platform - Linux, Mac OSX, and Windows.

Why Learn Pure JavaScript? Learning pure JavaScript (JavaScript only with no other libraries like jQuery) is important because the more familiar you are with JavaScript, the easier it will be for you to use the other JavaScript-based libraries. It will also help you understand why those other libraries were created (in most cases to make JavaScript easier to use). Also, once you see how difficult some things are in JavaScript, you will have a better appreciation for the way that jQuery and TypeScript make certain things easier to do.

Seeing a Result Makes Learning Easier The first thing that is important to your learning is knowing how to see a result. Browser developers have made things a lot easier these days by including Development Tools right in the browsers themselves. If you press F12 (in most browsers - definitely works in FireFox, Chrome, Edge), then you will see a new window area pop open. I’ve pressed F12 in FireFox on my Arduino blog so you can see what this will look like. Everything below the red line I added is the Browser Console.

There are also a number of tabs in that lower section. The first one is [imposter] and the second one which is currently selected is [Console].

The third one is [Debugger] and you can see the rest of them. Pressing F12 opens the sub-window up with the [Console] tab already selected, which is indicated by the faint blue line and the blue text (“Console”).

I do have other security programs running which may be part fo the reason Avast runs so slow. I'll shut one down at a time then run the scan again to see if that helps. Thanks for your help. Removable Volumes Scan: enables you to scan removable storage drives connected to your system. Custom scan: allows you to specify the files and folders to scan in the Settings. Learn more about how Avast Mac Security protects your computer.

In FireFox, you can enter JavaScript statements at the very bottom where it shows that grey >. You just click to the right of it and type the JavaScript you want to run, hit and your code will run. Go ahead and type: 2+2 When you do, FireFox will allow the JavaScript interpreter to run to evaluate the code and then it will print the result in the Console. Also notice that when you press your key, the Console window clears out the text you’ve typed from the >> line. That’s just a convenience so you can type another command. Other Browsers Differ A Bit If you are using Microsoft Edge, the Console window looks a bit different, but you’ll be able to find your way around. Errors Show Up Too If you had typed something that the JavaScript interpreter could not understand, it would give you an error.

I typed some nonsense: sda =ewwlj The JavaScript interpreter didn’t know what to do with that so it attempted to give me an idea of what it didn’t understand. The Console Will Remember All the Code You Type You can type numerous lines of JavaScript code and the Console will remember it as if you are typing in a larger program. For example, I’ll type in the following commands: >> var x = 2 + 2 >> console.log('This value of x is ' + x) Each time after I typed a line and pressed, then the JavaScript interpreter responds with ← undefined. This isn’t a problem. It just indicates that the browser is slightly confused about what is happening. It thinks that you are running a function that has no return value. You don’t have to worry about that for now.

Strange Characters and Text Sometimes, a character on the screen is something different than what the JavaScript interpreter thinks it is. This is true for double-quote characters.

They are represented in different editors in by various characters. It’s a long story but the point is that if you copy my code instead of typing the double-quote characters, then you may see a different and erroneous result. If you see something odd happen, then that may be the problem.

Finally, as you can see, when you type the second line that references the variable x ( var x), the interpreter remembers the value of x and is able to print it out. If you hadn’t already defined x, then the interpreter would’ve given you an error. For example, type the letter q and press. Now the interpreter tells you that q is not defined and that there is a ReferenceError. That means the JavaScript interpreter does not know about something you are referring to.