Ai Beginner Tutorial

[Heinz Francis]

WhenI started learning Blender 12 years ago, I remember feeling frustrated that there wasn't really any beginner "course". Like a series of posts that will show you the basics. Instead I had to jump from tutorial to tutorial, and gleam what I could from each. It would be years before I'd make full sense of it.

Since then, several other people have created beginner courses... but I personally find them to a bit overwhelming for beginners. When you're just getting started, it's daunting to see that you need to watch 100 posts.

So I set out to make something shorter. Something that could be finished in a day, and will show you how to make your first scene - while also gradually introducing new areas of Blender as you need them.

App Inventor is a free, cloud-based service that allows you to make your own mobile apps using a blocks-based programming language. You access App Inventor using a web browser (Chrome, Firefox, Safari). With these beginner-friendly tutorials, you will learn the basics of programming apps for Android and iOS phones and tablets.

We have four beginner tutorials to try out. We recommend starting with Hello Codi!, but any of the four tutorials are accessible for novice coders. They can all be completed within an hour.

You just made some pretty cool apps! But now the real fun begins: try turning TalkToMe into a Magic 8 Ball; turn BallBounce into a Mini Golf game, take DigitalDoodle to the next level by adding colors and incorporating pictures as backgrounds in PaintPot. The possibilities are endless!

For our getting started tutorial, we are going to use the trivial Counter demo from the Redux repo. The application is quite basic but is a good fit to illustrate the basic concepts of redux-saga without being lost in excessive details.

Sagas are implemented as Generator functions that yield objects to the redux-saga middleware. The yielded objects are a kind of instruction to be interpreted by the middleware. When a Promise is yielded to the middleware, the middleware will suspend the Saga until the Promise completes. In the above example, the incrementAsync Saga is suspended until the Promise returned by delay resolves, which will happen after 1 second.

Once the Promise is resolved, the middleware will resume the Saga, executing code until the next yield. In this example, the next statement is another yielded object: the result of calling put(type: 'INCREMENT'), which instructs the middleware to dispatch an INCREMENT action.

put is one example of what we call an Effect. Effects are plain JavaScript objects which contain instructions to be fulfilled by the middleware. When a middleware retrieves an Effect yielded by a Saga, the Saga is paused until the Effect is fulfilled.

Now we have 2 Sagas, and we need to start them both at once. To do that, we'll add a rootSaga that is responsible for starting our other Sagas. In the same file sagas.js, refactor the file as follows:

This Saga yields an array with the results of calling our two sagas, helloSaga and watchIncrementAsync. This means the two resulting Generators will be started in parallel. Now we only have to invoke sagaMiddleware.run on the root Saga in main.js.

The value field contains the yielded expression, i.e. the result of the expression afterthe yield. The done field indicates if the generator has terminated or if there are stillmore 'yield' expressions.

The first 2 invocations return the results of the yield expressions. On the 3rd invocationsince there is no more yield the done field is set to true. And since the incrementAsyncGenerator doesn't return anything (no return statement), the value field is set toundefined.

Well, redux-saga provides a way to make the above statement possible. Instead of callingdelay(1000) directly inside incrementAsync, we'll call it indirectly and export itto make a subsequent deep comparison possible:

In the first case, the yield expression delay(1000) is evaluated before it gets passed to the caller of next (the caller could be the middleware when running our code. It could also be our test code which runs the Generator function and iterates over the returned Generator). So what the caller gets is a Promise, like in the test code above.

In the second case, the yield expression call(delay, 1000) is what gets passed to the caller of next. call just like put, returns an Effect which instructs the middleware to call a given function with the given arguments. In fact, neither put nor call performs any dispatch or asynchronous call by themselves, they return plain JavaScript objects.

What happens is that the middleware examines the type of each yielded Effect then decides how to fulfill that Effect. If the Effect type is a PUT then it will dispatch an action to the Store. If the Effect is a CALL then it'll call the given function.

This tutorial is mainly for people who have primarily used GUI texteditors and coding environments and are not used to a primarilytext-based program, running commands in the editor itself, and/orusing large amounts of keyboard shortcuts.

The grey bar at the bottom of the screen is the status bar anddisplays various information about the point and the active buffer(there is one status bar per window). The white space below that iscalled the mini-buffer and will occasionally display status messages(e.g., after saving a file), and is also the place where you enterEmacs commands.

Type a buffer name into the mini-buffer (for example, *scratch*) andhit enter. This will close the window displaying the *Completions*buffer and open the *scratch* buffer in the window that hadpreviously displayed the GNU Emacs buffer.

Revisiting the concept of windows: they are essentially just viewsinto a buffer. You can open up multiple windows in the same frame (Iusually use two vertical windows) and you can have multiple windowsdisplaying the same buffer:

Why the distinction between windows and buffers? It is useful to havebuffers open in the background even if they are not currentlydisplayed through a window because reading and displaying a bufferfrom memory is much, much faster than reading and displaying a bufferfrom disk. So if you are frequently switching between five differentfiles but you only have two windows open, it is better to open allfiles once, load them into buffers (memory), and then switch betweenthe buffers instead.

The difference is that in basic text editors, you can only copy or cutone piece of text at a time. In Emacs, there is what is called a killring which can hold multiple regions of text that you havekilled. When you yank text, you are yanking it off the kill ring andback into the buffer. So if I kill a region without deleting it, I amcopying the contents of the region into the kill ring but not actuallydeleting the region from the buffer.

If you type a lot of words into Emacs, you will notice that it doesnot automatically wrap the text. This can be very annoying both formoving the point around if you are typing full paragraphs, becauseEmacs will treat the paragraph as a single line, and for readability.

To move the point up or down a whole paragraph (instead of a singleline), use C-up or C-down. To move the point past a whole word(instead of a single character), use C-left or C-right. Tomove to the beginning of a line, use the home key; to move to theend of a line, use the end key. To move up or down a page, you canuse the page up and page down keys. To move to the beginningof the buffer, use M-.

I would like to ask if you can recommend me a tutorial for a very beginner?

I received root files with data.

I can already write a simple macro that opens a root file, draw a graph, a histogram, and save it to a new root file.

This chapter contains step-by-step instructions on how to create, mount, and use a VeraCrypt volume. We strongly recommend that you also read the other sections of this manual, as they contain important information.

The VeraCrypt Volume Creation Wizard window should appear.

In this step you need to choose where you wish the VeraCrypt volume to be created. A VeraCrypt volume can reside in a file, which is also called container, in a partition or drive. In this tutorial, we will choose the first option and create a VeraCrypt volume within a file.

As the option is selected by default, you can just click Next.

In this step you need to choose whether to create a standard or hidden VeraCrypt volume. In this tutorial, we will choose the former option and create a standard VeraCrypt volume.

As the option is selected by default, you can just click Next.

In this step you have to specify where you wish the VeraCrypt volume (file container) to be created. Note that a VeraCrypt container is just like any normal file. It can be, for example, moved or deleted as any normal file. It also needs a filename, which you will choose in the next step.

Click Select File.

The standard Windows file selector should appear (while the window of the VeraCrypt Volume Creation Wizard remains open in the background).

IMPORTANT: Note that VeraCrypt will not encrypt any existing files (when creating a VeraCrypt file container). If you select an existing file in this step, it will be overwritten and replaced by the newly created volume (so the overwritten file will be lost, not encrypted). You will be able to encrypt existing files (later on) by moving them to the VeraCrypt volume that we are creating now.*

Select the desired path (where you wish the container to be created) in the file selector. Type the desired container file name in theFilename box.

Click Save.

The file selector window should disappear.

In the following steps, we will return to the VeraCrypt Volume Creation Wizard.

* Note that after you copy existing unencrypted files to a VeraCrypt volume, you should securely erase (wipe) the original unencrypted files. There are software tools that can be used for the purpose of secure erasure (many of them are free).

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