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There.

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Welcome back.

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So in this section we're going to focus on something brand new.

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It's going to be a little bit of a side trip for a moment away from Noad and express and the Yelp camp

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and all of the stuff we've been covering.

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We're not even we can write javascript h h him out or C Ss for the next few videos.

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We're going to focus on something called Get and most of you have probably heard of it or come across

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it in some way.

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It's very popular and important technology but it's it's very different than what we've done so far

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.

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It's not really a full language.

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It's not something that is actually that complex.

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It is a little tricky to really master and to get going at the beginning so I'm not trying to trivialize

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that at all but it is it's not like learning javascript or learning all of CCs.

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It's scope is much much smaller.

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So as I mentioned it is popular.

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I still haven't told you what it is really but it is popular.

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I just read today that 42 percent of developers use it and I don't know if that's in the US or across

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the entire world.

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But 42 percent of some population of developers uses it which is more than we can say about a lot of

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technologies.

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So what it is is a version control system.

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So if I go to the official get home page which is get dash as CMD dot com it's not going to be all that

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illuminating up front but what it tells us is that it is a free and open source distributed version

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control system designed to handle everything from small to very large projects with with speed and efficiency

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.

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So what is a version control system.

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Basically it's a way for us to work with different versions of our code so that we can save different

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features and make notes as we progress and have different versions that we can move forwards and backwards

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through time.

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And then we can also collaborate with other people and incorporate different versions of some code that

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I wrote with code that my coworker wrote.

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So it's really powerful.

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I said a lot of developers use it.

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It's definitely important.

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You might be wondering why I waited until this point to teach it and I've been I've seen a lot of questions

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about that.

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People who are starting the course wondering when when recovery get the reason that I didn't teach it

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up front.

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BUSH I actually have.

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Usually they do historically as I spend time teaching get at the beginning.

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And we also start with a command line early on.

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There's a few reasons really.

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One is that it's not that exciting.

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And I didn't want to lose people's interest right at the beginning especially in an online course where

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it's so easy to check out to not pay attention versus in an online or in an in-person class.

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I have you hostage for at least 45 minutes for a lecture where you have said you know you have to try

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it.

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So I didn't want to discourage people early on on top of that.

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It is something that requires the terminal.

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So you need to understand command line.

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And I didn't want to move command line to the beginning because then we have to talk about cloud 9 and

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installation.

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And I wanted just to keep it simple at the beginning.

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So that's the two of the reasons.

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The third one that's most important is that it's really hard to understand the utility of good to really

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see why it makes sense when you're working by yourself and when you're just starting out.

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So I mentioned that it helps you save different versions and helps you collaborate with people if you

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have a huge project it's really beneficial.

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But of course the beginning of this class we don't have any huge projects.

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We're not collaborating with people.

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And even at this point you're not necessarily collaborating.

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You're most likely learning on your own.

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So it's a little bit hard to really motivate.

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Why get is all that useful.

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I can I can convince you that it's useful but I don't think I would be able to get you to use it willingly

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and get you to want to use it until later in the course.

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So we're at that point now we're covering it.

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You've also probably heard of get hub if I go back here to our notes these are the big things I want

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to talk about.

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So what is it.

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What is it hub.

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They're very different.

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They are related maybe very different is too strong of a word but they're not the same thing.

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That's a really common misconception with beginners who just kind of lumped them in together.

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Get is that technology.

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It's totally separate get hub is a Web site.

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It's an application that works with get but they're they're not the same thing at all.

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So I'm actually going to talk more about what good hub is further down here.

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We can work with get and not even know about not care about get hub at all and lots of people do that

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though use get but they won't use get hub.

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It's not that common but it's possible.

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So we're going to focus on just get at the beginning so we talked about these two why you should care

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again is that it's really useful.

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So that's one thing you will potentially use this a lot especially for it if you end up working with

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people whether it's as a contractor or you get a job as a developer.

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It's something that lots and lots of teams use.

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As I mentioned 42 percent of developers from.

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So that's mainly why you should care.

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It's also one of those things is just good to have on your resume.

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And it's actually not limited only to writing code.

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Initially that was what it was kind of created for.

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But more recently there's been other applications.

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So one of those that I want to talk about is using it to help manage the process of writing a novel

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or a play or screenplay.

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So imagine that you are a writer and you have some huge story that's in your head that you're going

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to sit down and write in and I don't know.

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I've tried writing a screenplay before my process was very difficult.

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Lots of revisions lots of different drafts that I would save and my process is much the same as my process

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for writing essays in college was to write a version and save it as essay V-1 and then if I wanted to

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make some other crazy change or I decided I'm going to lead this entire paragraph and try something

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totally different.

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But I don't want to abandon what I had at the beginning then I would use Save As and make a copy and

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have essay V-2.

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And every time I wanted to have sort of a checkpoint where I could go back I could revert to my old

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draft I could read what I used to have I would create a new document and you as could give it a new

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title and usually increment the numbers and eventually I'd get something like this essay like Final

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real version.

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Pick this on something ridiculous because my name is my naming conventions are wasn't really a convention

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but my name and got out of hand.

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So that's a problem that get solved or one of the problems is that with get what I can do is have one

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essay or one screenplay that I'm working on and use.

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Get in and basically tell it to save my files to keep track of them.

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I still have to save the files in my text editor.

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But what I can do with get is say all right at this point save all these files and I've just added in

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the death of the main character and then I could write a little bit more and save again using get and

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say that I've now just added in the death of the secondary character and then I could change my mind

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and say maybe I should take the story in a different route.

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So then I could try something and save another version of it.

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Not really a draft but save another version where instead of killing off the two main characters they

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both live and they get married and they have kids.

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And what I can do later on if you know my editor gets the story and decides you know you really should

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of killed them off.

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I can easily just using a simple get command.

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It's a go back to the point where I saved it where I said that I killed off the main character or where

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I said you know X or Y.

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Basically you can leave little messages for yourself and it's not only that it's not limited to one

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file which is something that's very different from traditional systems of managing your version so on

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an essay it's one file that I'm working on.

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I save it and then I might save as.

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But it's always one file.

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What you can do with it get is if you have a huge project so going going to code.

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Now if we have a project with 10 javascript files a bunch of CSSA some images HCM lots of different

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technologies.

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Let's say it's an express app that's lots of folders.

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What I can do is target individual pieces and save them using get.

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So I can say OK I just created the directory and added in the views for dogs.

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And I can save that as a checkpoint that I can come back to later.

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And then I could do something later on raid and decide OK just remove the dogs from the views directory

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and instead move them into their own dog's directory inside with a view directory.

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And I can say that is a checkpoint and then I could do that for all different pieces so usually what

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you end up with is at the end of a project you'll have lots and lots of different little commits is

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what they're called.

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So I'm going to show you a quick example of that and I am going to get hub which again is not the same

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as get.

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Think of it as a viewer forget a way to share different versions of things to share code with people

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.

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It's not get itself though.

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So this is the express repository on get hub.

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And what I want to point out.

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So this is the code for express that we've been using when we run NPM install Express.

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This code is run well not necessarily run when we install but when we include Express and we execute

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it then a lot of this code is run.

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What I want to show though is right here.

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Five thousand one hundred ninety four commits.

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So in the next video we actually write our own commits and I'll show you with that what that looks like

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and really what it means.

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But take a look at all these messages and there's thousands of them.

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So let me just pick an arbitrary one here.

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Let's let's look at let's find Harry.

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This is fine.

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Update exampled dependencies.

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If I click on that what I see here are the files that were included in this commit.

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So the files that were basically targeted to be saved to make a version of a message that says update

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example dependencies.

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And I see what was changed.

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So we changed the versions.

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It looks like Harry whoever wrote this Doug Wilson changed the versions.

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So that's a simple example of a commit.

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Let's see if we can try to find something a little bit more complex.

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All right.

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Well here's one or two files so Express is probably 100 plus files across this entire repository.

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But in this case someone made a small commit with two changes across two files.

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So that's just a few examples.

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Feel free to take a look.

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Obviously you're not expected to understand the code or all the terminology but take a look and it's

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fun to go back to the very beginning.

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I actually don't know if there's a really easy way to get to do that just to hop back to the very beginning

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but you could try changing this to be page 50 and that takes you back to 2012.

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So that's a lot of show of express.

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Again we'll return to get her up shortly but we're going to start by talking about get in our terminal

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where we're just writing our own code and saving it at different places using get to make our own commits

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but we're not going to be sharing those with anyone until we talk about get up.

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So the last thing I want to mention is installing get and I have in parentheses.

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Not really.

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And that's because using Cloud 9 we don't have to install kid ourselves.

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It comes installed already when you make a new cloud nine instance.

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But if you're not using Cloud 9 if you're using a terminal your own terminal your own shell that you

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installed you will have to install it so you can find plenty of instructions online.

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Occasionally things go wrong you need some dependencies but it's one of the most installed tools on

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in all of web development so there's lots of tutorials resources stack overflow posts everywhere.

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But using cloud 9 we don't have to worry about that.

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So just to make sure that it works here's the test you can do.

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Get dash dash version.

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And as long as you see something here it doesn't have to be one point nine point one.

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If you're seeing this in the future and you have a different version there that's fine.

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All that matters is that you don't see commed not found.

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You don't see an error message and that's all we're going to do with get for now in the next lesson

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.

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We're going to talk about three new commands.

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Get a net get ADD and get commit.

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All right I'll see if Nelson