1 00:00:02,070 --> 00:00:04,940 Now, when it comes to writing that essay, 2 00:00:04,940 --> 00:00:08,560 that good story, there are a couple of key pain points, 3 00:00:08,560 --> 00:00:11,570 a couple of key areas on what you wanna focus 4 00:00:11,570 --> 00:00:14,480 and which will be the sections in this course 5 00:00:14,480 --> 00:00:16,860 where we will go through all the core concepts 6 00:00:16,860 --> 00:00:18,440 in great detail. 7 00:00:18,440 --> 00:00:21,460 It all starts with the naming of things. 8 00:00:21,460 --> 00:00:24,240 With the names we assign to variables, functions, 9 00:00:24,240 --> 00:00:25,460 and classes. 10 00:00:25,460 --> 00:00:28,060 We can already mess up code with that 11 00:00:28,060 --> 00:00:30,150 as you saw with the initial example, 12 00:00:30,150 --> 00:00:32,013 I showed you a couple of minutes ago. 13 00:00:32,900 --> 00:00:35,820 It continues with the general code structure 14 00:00:35,820 --> 00:00:38,580 and any comments we might have in the code. 15 00:00:38,580 --> 00:00:40,120 As you will learn in this course, 16 00:00:40,120 --> 00:00:41,880 code formatting matters, 17 00:00:41,880 --> 00:00:45,550 and there are various aspects that come into play 18 00:00:45,550 --> 00:00:47,700 when we talk about code formatting. 19 00:00:47,700 --> 00:00:51,350 And we also can differentiate between good and bad comments, 20 00:00:51,350 --> 00:00:54,930 and we can see how that matters and how comments 21 00:00:54,930 --> 00:00:57,730 and too many comments could actually lead 22 00:00:57,730 --> 00:01:00,323 to dirty code instead of improving. 23 00:01:01,310 --> 00:01:03,160 Another key pain point, 24 00:01:03,160 --> 00:01:04,530 another important area, 25 00:01:04,530 --> 00:01:07,330 which we'll have an entire section on in this course 26 00:01:07,330 --> 00:01:08,890 will be functions. 27 00:01:08,890 --> 00:01:12,390 There it's about the length of the functions, 28 00:01:12,390 --> 00:01:14,830 so the amount of code in the functions 29 00:01:14,830 --> 00:01:17,640 and the kind of code inside of a single function, 30 00:01:17,640 --> 00:01:20,910 and the number of parameters a function takes. 31 00:01:20,910 --> 00:01:22,650 As you will learn in this course, 32 00:01:22,650 --> 00:01:25,500 functions are also one of the key things 33 00:01:25,500 --> 00:01:28,060 that leads to bad and dirty code. 34 00:01:28,060 --> 00:01:31,060 And therefore knowing how to write good functions 35 00:01:31,060 --> 00:01:34,963 is a key skill and you will get it in this course. 36 00:01:35,870 --> 00:01:38,450 We also will have a look at conditionals 37 00:01:38,450 --> 00:01:39,860 and error handling 38 00:01:39,860 --> 00:01:41,980 because nesting conditionals 39 00:01:41,980 --> 00:01:45,200 and controlled structures in general too deeply 40 00:01:45,200 --> 00:01:48,340 and not using error handling appropriately, 41 00:01:48,340 --> 00:01:50,790 these are also two common mistakes 42 00:01:50,790 --> 00:01:52,380 a lot of developers make, 43 00:01:52,380 --> 00:01:55,940 and they also lead to dirty or bad code 44 00:01:55,940 --> 00:01:58,160 and doing it right on the other hand, 45 00:01:58,160 --> 00:01:59,990 will improve our code a lot 46 00:01:59,990 --> 00:02:03,693 and will be one core building block of writing clean code. 47 00:02:04,610 --> 00:02:08,120 Last but not least, working with classes, objects, 48 00:02:08,120 --> 00:02:09,640 and data structures. 49 00:02:09,640 --> 00:02:14,290 That's another key area where it's easy to mess up code. 50 00:02:14,290 --> 00:02:16,820 It's easy to have no distinction, 51 00:02:16,820 --> 00:02:19,630 no separation between data structures 52 00:02:19,630 --> 00:02:21,280 and real objects. 53 00:02:21,280 --> 00:02:23,480 And we will learn what the difference is 54 00:02:23,480 --> 00:02:25,070 in this course, of course. 55 00:02:25,070 --> 00:02:28,260 And it's also easy to end up with bloated classes, 56 00:02:28,260 --> 00:02:30,420 which are doing too many things, 57 00:02:30,420 --> 00:02:33,010 hence making it difficult for our developers 58 00:02:33,010 --> 00:02:34,760 to understand them. 59 00:02:34,760 --> 00:02:36,510 In this course, we're going to have a look at 60 00:02:36,510 --> 00:02:39,750 all these areas at all these pain points, 61 00:02:39,750 --> 00:02:42,170 and we'll not just learn about the problems 62 00:02:42,170 --> 00:02:43,690 and the challenges there, 63 00:02:43,690 --> 00:02:45,960 but of course, we're going to dive into the various 64 00:02:45,960 --> 00:02:50,440 solutions you can apply to write cleaner code. 65 00:02:50,440 --> 00:02:53,990 We'll dive into important rules and concepts, patterns, 66 00:02:53,990 --> 00:02:55,920 and principles you should be aware of. 67 00:02:55,920 --> 00:02:58,270 And we're also going to have a look 68 00:02:58,270 --> 00:02:59,620 in the functions module. 69 00:02:59,620 --> 00:03:02,810 We're also going to have a look at test-driven development 70 00:03:02,810 --> 00:03:06,550 or how testing can help you write clean code as well. 71 00:03:06,550 --> 00:03:08,260 Though, I also wanna make it clear, 72 00:03:08,260 --> 00:03:11,010 this is not a test-driven development course, 73 00:03:11,010 --> 00:03:12,610 not at all. 74 00:03:12,610 --> 00:03:14,150 So by the end of the course, 75 00:03:14,150 --> 00:03:16,720 once we went through all these sections, 76 00:03:16,720 --> 00:03:19,890 we'll definitely not write code like this anymore. 77 00:03:19,890 --> 00:03:22,930 Instead you will know how to write clean code 78 00:03:22,930 --> 00:03:24,220 right from the start, 79 00:03:24,220 --> 00:03:27,880 but also how you can derive clean code over time 80 00:03:27,880 --> 00:03:29,923 as you're working on a project.