WEBVTT 00:00.090 --> 00:04.760 So I know that was a very brief introduction to two lines of node of Javascript. 00:04.890 --> 00:07.280 But we're now moving on to more important things. 00:07.280 --> 00:12.760 Things that are relevant to my out and the first thing we'll do is talk about a package called faker. 00:13.170 --> 00:15.570 So the first question you might have is what is a package. 00:15.690 --> 00:21.200 And basically Noad comes with thousands and thousands of libraries. 00:21.240 --> 00:26.820 You might have heard them called their packages or modules code that other people have written that 00:26.820 --> 00:33.300 we can include instead of for application really simply all we have to do is say install faker which 00:33.300 --> 00:38.070 is a package we're going to use but we'll use another package later called Express or we'll use one 00:38.070 --> 00:39.210 called My as well. 00:39.210 --> 00:44.600 And all I have to say is install my Eskew up install F.A. and there are thousands of them out there 00:44.610 --> 00:50.220 like I said and that's one of the biggest strengths of note is that it has a huge library of all these 00:50.220 --> 00:52.980 packages that you don't have to do everything yourself. 00:53.070 --> 00:57.080 You can go and get some help by including somebody else's package. 00:57.480 --> 01:02.750 So the way we do it is through something called and PM node package manager. 01:03.330 --> 01:07.440 And to install faker which don't worry I'll explain what failure is. 01:07.710 --> 01:11.600 This is all we have to type into our terminal NPM install failure. 01:11.970 --> 01:15.020 But before we go there let me show you what F.A. is. 01:15.090 --> 01:19.560 So faker is a package that there's a bunch of different versions of it. 01:19.710 --> 01:25.410 I think the original one was for Ruby not positive but there's faker kind of implementations for other 01:25.410 --> 01:32.340 languages including javascript and what it does is it really helps us streamline the process of generating 01:32.340 --> 01:33.680 fake data. 01:34.110 --> 01:39.300 So we're going to use it because we want to start off with a bunch of fake data in our database. 01:39.300 --> 01:44.310 I don't know if you noticed I had 518 519 users in my database. 01:44.400 --> 01:48.090 I did not enter those manually and they are they're all unique. 01:48.090 --> 01:49.930 They have a different unique e-mail address. 01:49.930 --> 01:51.740 I did not generate those myself. 01:52.020 --> 01:54.050 So we're going to use failure to do that. 01:54.300 --> 01:55.620 So fakers very simple. 01:55.620 --> 02:03.990 I can say things like faker dot address dot County and it will give me a random county name and it has 02:03.990 --> 02:04.920 hundreds of them. 02:05.340 --> 02:12.670 Or I could say faker did but say name dot job descriptor and it will give me a random job descriptor. 02:12.750 --> 02:14.160 So there's tons of things in here. 02:14.160 --> 02:23.460 Phone numbers random numbers file names collar's avatars emails usernames domains passwords like so 02:23.460 --> 02:28.710 many things that we could pick from credit card fake credit card numbers account numbers you get it 02:28.950 --> 02:29.550 hopefully. 02:29.580 --> 02:30.660 So back in cloud nine. 02:30.660 --> 02:35.310 Now what I'm going to do is actually empty this file entirely. 02:35.520 --> 02:37.840 Yes you can make a new file if you'd like. 02:37.890 --> 02:41.350 And now I'm going to install faker so we can use it. 02:41.400 --> 02:46.340 So this video I probably could've done a better job explaining this is about two things. 02:46.350 --> 02:47.570 One faker. 02:47.640 --> 02:51.500 But on a higher level packages in general and how you use them. 02:51.510 --> 02:58.050 So this is the workflow for using a package type NPM install the name of the package and hit enter you 02:58.090 --> 03:04.230 know take a second and that on it own installs a package you'll notice I have a new folder here called 03:04.230 --> 03:10.180 node modules inside there is all the F.A. code all this stuff. 03:10.340 --> 03:11.370 So all of that is here now. 03:11.390 --> 03:12.610 I just had to type a single line. 03:12.620 --> 03:13.960 It's pretty awesome. 03:14.750 --> 03:15.720 Now in my app. 03:15.790 --> 03:16.160 Yes. 03:16.190 --> 03:18.300 I can't just start using it immediately. 03:18.300 --> 03:23.390 I can't just say fake or dot e-mail or something. 03:23.660 --> 03:29.360 I first have to tell this file I want to use fake or I have to include it or import it. 03:29.480 --> 03:31.130 And it's very easy. 03:31.130 --> 03:36.980 I'm just going to say Fard faker equals require faker. 03:37.460 --> 03:44.110 So this right here is a variable I can call this anything I could say my faker. 03:44.660 --> 03:46.510 I'm going to call it faker standard. 03:46.700 --> 03:49.130 And this is the part that I can't change. 03:49.130 --> 03:50.560 This has to be faker. 03:50.570 --> 03:56.600 So this is going to go find a package that I've installed in node modules with the name F.A. and then 03:56.600 --> 03:58.570 save it into this variable. 03:58.580 --> 04:05.160 So now whenever I use the word faker referring to this variable I actually am referring to the package. 04:05.480 --> 04:12.590 So then we can do things with it so we could do something like this faker dumb Internet email and that 04:12.590 --> 04:19.120 will generate things like this or this or this or 23. 04:19.220 --> 04:25.270 Simone Walsh Aubree underscore dot tree numbers we've got hot male and female and Yahoo. 04:25.400 --> 04:30.680 So this would be a pain if we were doing this ourselves to come up with 500 individual emails. 04:31.040 --> 04:34.020 And the other thing I'll show you is we're going to use it for dates. 04:34.070 --> 04:36.120 So I'll be able to say fake or not date. 04:36.290 --> 04:39.120 And this is important past. 04:39.300 --> 04:41.110 We don't want to have any future dates. 04:41.150 --> 04:46.460 Basically we want to start with 500 users in our database who have signed up at some point in the past. 04:46.830 --> 04:49.230 So it will generate things like this. 04:49.280 --> 04:51.570 So we also don't want to have to do that ourselves. 04:51.980 --> 04:57.940 So let's start with faker Internet email. 04:58.690 --> 05:04.940 I mean in parentheses at the end sort of like might as well it's a function we're telling it to execute. 05:04.940 --> 05:12.420 If I just do it on its own and I run the file now which is actually yes nothing happens. 05:12.510 --> 05:13.300 Well it's a lie. 05:13.320 --> 05:14.410 It does happen. 05:14.550 --> 05:17.400 This runs but we don't see the result. 05:17.550 --> 05:23.610 And that's because we need to print it so we can do cancel that log like this. 05:23.610 --> 05:24.910 There we go. 05:24.910 --> 05:29.460 Now if I run it again I see OK we get a new e-mail. 05:29.460 --> 05:33.730 Jared Lee lovely Trevor whatever. 05:33.930 --> 05:36.330 So we're getting these fake e-mails. 05:36.420 --> 05:43.230 We're going to use that along with you know copy this and do faker. 05:43.700 --> 05:48.690 Dot dot dot past which is the other thing I showed you. 05:48.830 --> 05:54.040 Going to use those two to generate a 500 user. 05:54.040 --> 05:55.720 So basically this is one user. 05:55.990 --> 06:03.940 So it's kind of fun to play around a faker bit could do you know dot hacker dot abbreviation or finance 06:04.000 --> 06:07.080 dot currency symbol or bitcoin address. 06:07.180 --> 06:19.750 Let's do address and then city so we can do get rid of these two for now Council log faker address that 06:19.780 --> 06:21.500 city. 06:21.510 --> 06:24.840 If we save and run that there we go. 06:24.840 --> 06:28.990 Roberto ville and if we try it again you get something different new. 06:29.010 --> 06:30.810 Alexandra are for it. 06:31.140 --> 06:33.450 So that's the basics of faker. 06:33.510 --> 06:38.790 I will show you if so if you already know javascript skip this section but I just want to show a bit 06:38.790 --> 06:45.690 more sort of the extended version of crash course in node how we can string things together and make 06:45.690 --> 06:47.710 more complex logic. 06:47.730 --> 06:55.360 So let's say I wanted to generate a complete address so I wanted you know a number and the street and 06:55.360 --> 06:55.920 the city. 06:55.920 --> 06:59.800 Let's start with those three so faker has ways of doing that. 06:59.820 --> 07:03.630 You've got what do we have street name and street address. 07:03.720 --> 07:16.460 So let's start with that got faker at address dot street address start there and run this again. 07:16.900 --> 07:17.510 OK. 07:17.750 --> 07:20.580 So there we go that's working. 07:20.900 --> 07:23.130 Then we've got the city right. 07:23.450 --> 07:27.410 And then let's say we want to do a state as well for working in the U.S. 07:30.070 --> 07:30.670 perfect. 07:30.670 --> 07:32.890 So here is the complete address right now. 07:32.890 --> 07:41.010 Every time I say one want three different addresses I would have to copy these lines like that which 07:41.070 --> 07:42.390 is not the end of the world right. 07:42.420 --> 07:43.780 We can copy lines. 07:44.310 --> 07:46.490 But there's a much better way of doing this. 07:46.500 --> 07:53.010 So what we could do instead is create what's known as a function and I'll just call this generate address. 07:53.190 --> 08:00.570 Think of this as a way of reusing our code and the syntax looks like this function a name parentheses 08:00.620 --> 08:10.150 and then brackets and whatever we put in those brackets will be run every time I refer back to generate 08:10.150 --> 08:11.790 an address so on it's own. 08:11.910 --> 08:19.140 If I just save this nothing is going to happen when I hit a UPS when I hit save. 08:19.140 --> 08:20.850 Now I go down here to Node. 08:21.360 --> 08:28.400 We don't get anything but I have to do is now call this function just like this. 08:30.550 --> 08:34.850 Now it saying OK is there something called general address. 08:34.870 --> 08:36.230 Oh yes there is. 08:36.230 --> 08:38.650 All right well let's run the three lines inside of it. 08:39.050 --> 08:50.220 So if I ran this three times now it's only three lines that we get three different addresses of course 08:50.310 --> 08:54.080 we might want to you know compile these together so that they're not on three separate lines. 08:54.180 --> 08:55.710 You want commas between them. 08:55.710 --> 08:56.970 We could really improve it. 08:57.150 --> 09:01.770 But the point is that that's basically how you define a function and we'll be working with functions 09:01.770 --> 09:02.410 later on. 09:02.550 --> 09:04.480 But for now that's all I'm going to show. 09:04.680 --> 09:06.330 OK so that's the basics of faker. 09:06.360 --> 09:11.030 The basics of packages will be installing other packages as well as the basics of node.