1 00:00:00,770 --> 00:00:03,350 Let's talk about the last method. 2 00:00:03,800 --> 00:00:10,400 Then we start our coding challenge and that is filter because you may need all this concept, be able 3 00:00:10,400 --> 00:00:12,710 to solve some of the coding challenges. 4 00:00:12,710 --> 00:00:14,810 So let's get rocking. 5 00:00:15,410 --> 00:00:21,410 Let me comment this once or for the meantime, let me comment out this logic here and now. 6 00:00:21,560 --> 00:00:24,710 Let me use the same data here for. 7 00:00:25,580 --> 00:00:26,690 The filter. 8 00:00:26,690 --> 00:00:30,530 So we'll come down here and let's say filter. 9 00:00:30,800 --> 00:00:36,620 The name is even also clear to us what actually is supposed to do. 10 00:00:37,170 --> 00:00:44,120 Flavor type means that we are going to have let's say that I have this box. 11 00:00:45,480 --> 00:00:46,320 Like that. 12 00:00:46,320 --> 00:00:51,300 And in this box I have let's see a lot of books or less. 13 00:00:51,300 --> 00:00:54,270 Let me see books or let me see students, for example. 14 00:00:54,270 --> 00:00:54,510 Yeah. 15 00:00:54,540 --> 00:00:57,810 Students are in this array like that. 16 00:00:57,810 --> 00:00:59,040 These are students. 17 00:00:59,520 --> 00:01:01,920 Yes, these are students here. 18 00:01:02,190 --> 00:01:02,800 Good. 19 00:01:02,850 --> 00:01:10,800 So for these students, we want to select after examination, you want to know all students who got 20 00:01:10,800 --> 00:01:12,600 above 90%. 21 00:01:12,990 --> 00:01:18,360 I'm going to put you in a different class or it's going to different in a different way. 22 00:01:18,420 --> 00:01:23,720 So let's say we got at least I mean, two of them who got above 90%. 23 00:01:23,730 --> 00:01:29,940 We see that we have filtered out those that are here into a new array. 24 00:01:30,830 --> 00:01:32,000 That's about future. 25 00:01:32,120 --> 00:01:32,770 Right. 26 00:01:32,780 --> 00:01:35,780 So if you were to create a new array. 27 00:01:36,600 --> 00:01:43,380 And it's called a new array out of this, the original array based on our criteria. 28 00:01:43,830 --> 00:01:47,970 So for this date, we have right now about edges. 29 00:01:48,120 --> 00:01:51,030 For the meantime, let's say scores. 30 00:01:52,090 --> 00:01:53,320 Scores I read. 31 00:01:54,590 --> 00:01:55,190 Good. 32 00:01:55,910 --> 00:02:01,610 So for this cause I really I think to the person go to is not make sense. 33 00:02:01,940 --> 00:02:05,260 Let's see 50 and then this is 60. 34 00:02:05,270 --> 00:02:06,020 Yes. 35 00:02:06,470 --> 00:02:07,970 This examination was tough. 36 00:02:07,970 --> 00:02:10,610 Nobody got above 70%. 37 00:02:11,270 --> 00:02:12,290 We are wicked. 38 00:02:12,620 --> 00:02:17,720 So here, let's say that find or score. 39 00:02:18,860 --> 00:02:19,850 Above. 40 00:02:21,070 --> 00:02:23,620 Let's say 20. 41 00:02:24,470 --> 00:02:28,480 About 20 years a m is about 5050. 42 00:02:28,510 --> 00:02:29,150 Yes. 43 00:02:29,170 --> 00:02:30,880 How are you going to do it? 44 00:02:31,030 --> 00:02:32,650 The same way we did for fine. 45 00:02:32,650 --> 00:02:39,910 But instead are going to use filter to filter out those who who I mean, pass our criteria here. 46 00:02:40,060 --> 00:02:41,200 So here we go. 47 00:02:41,560 --> 00:02:44,560 So the same process as we did. 48 00:02:44,560 --> 00:02:47,200 So we I would take this course array. 49 00:02:47,560 --> 00:02:49,030 Let me go up a little bit. 50 00:02:49,180 --> 00:02:50,800 Dot filter. 51 00:02:53,700 --> 00:02:58,110 Futura my function and then my callback function as that. 52 00:02:58,110 --> 00:03:04,560 And inside I have the individual record as my score and now my parentheses as that. 53 00:03:04,830 --> 00:03:08,850 So here, retain what I'm going to retain. 54 00:03:08,910 --> 00:03:16,320 Again, if you try to console that log, the score is the same thing you got as find. 55 00:03:16,620 --> 00:03:19,080 You see that we got the individual record here. 56 00:03:19,080 --> 00:03:24,240 So this call represents these values here in the callback function. 57 00:03:25,040 --> 00:03:25,820 Like that. 58 00:03:26,810 --> 00:03:35,090 So now if I get that one, I can return from this function that hey, if the score. 59 00:03:36,480 --> 00:03:39,210 Is more than 50. 60 00:03:39,480 --> 00:03:41,480 Then I won't get those. 61 00:03:41,490 --> 00:03:46,140 So as soon as this function returns through, the filter will not run again. 62 00:03:46,530 --> 00:03:52,770 So now let's assign the result to a variable called C unsigned equal to that. 63 00:03:53,340 --> 00:03:59,700 So if I console.log the answer, check the console. 64 00:03:59,850 --> 00:04:01,680 We have only 60. 65 00:04:02,550 --> 00:04:05,450 So that this one is an array in an array. 66 00:04:05,460 --> 00:04:07,740 But if I bring find here. 67 00:04:08,760 --> 00:04:14,010 We see is a single value because I read returns the fine, returns a single value. 68 00:04:14,460 --> 00:04:15,990 If I bring it back to filter. 69 00:04:17,380 --> 00:04:18,190 If pure to back. 70 00:04:18,220 --> 00:04:19,930 You see that is an array. 71 00:04:20,200 --> 00:04:28,720 So here, if I add, let's say 70 or 90 here you see that I get those values in the array because they 72 00:04:28,720 --> 00:04:30,310 are all above 50. 73 00:04:30,760 --> 00:04:33,310 I can also add 100 into it. 74 00:04:33,340 --> 00:04:43,150 Now we see that 60, 90, 100 are above 40, 50 score and that is about the future. 75 00:04:43,750 --> 00:04:48,820 So in the next video, let's start with our first coding challenge and the arrays.