WEBVTT

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So way way back, at the beginning of the course, we introduced you to Git and GitHub as a part of the

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'I am poor' challenge and that was just to show you how Git works and how you can use GitHub or our repositories

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that are hosted on Github in order to download the skeleton project and to follow along with the tutorials.

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Now in this module, I want to introduce you formally to how Git works and how you can use it to achieve

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various powerful ends.

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And I'm going to be talking about and showing you how you can use Git both inside Xcode and on the

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command line to do things such as version control, well how to clone repositories, how to fork make pull

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requests and merge repositories and a whole bunch of really really exciting things.

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So once you're ready let's get started and let's start learning about Git.

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So let's talk about version control in its simplest form.

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Let's say that I create a new code file and I write a few lines in it.

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Now I decide to put it under version control using Git

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and let's say that I call this save point as number 1,

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now this is my first version. So

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later on as I progress I write maybe a few more lines of code.

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And at this point I decide to make another save point and I call this my second version.

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So further down the line I accidentally screw up my entire code file and it's irreparable and I get

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to the point where I would rather burn my entire code file rather than having to try and fix it.

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You do get into these situations because very often your code is interlinked and each class depends

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on another and sometimes you can screw up in a way where you know all hope is lost and I simply just

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want to roll back to the last save point.

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I can do that using Git.

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I can do that using other tools as well

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but the most popular tool and the one that we're going to be talking about is Git.

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So you can either compare your current code file so the current mess that you've made against a previous

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version so that any of the save points before.

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Alternatively you can simply just roll back to a previous version and it doesn't have to be the one

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that was immediately previous.

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You can go as far back or as far forwards as you like as long as you know which version you want.

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So in the next lesson I'm going to show you version control using Git locally on your computer.

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I'm going to use the command line to do this.

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So I'll see you there.