1 00:00:00,330 --> 00:00:00,900 OK. 2 00:00:01,050 --> 00:00:04,360 So as you know about our two dimensional arrays. 3 00:00:04,440 --> 00:00:04,970 OK. 4 00:00:05,190 --> 00:00:09,100 First of all we're actually turning the lens of this group names. 5 00:00:09,270 --> 00:00:10,350 So it is OK. 6 00:00:10,360 --> 00:00:13,560 OK we are actually returning the lead of this arey. 7 00:00:13,620 --> 00:00:15,990 OK so the level of this art is number five. 8 00:00:16,020 --> 00:00:16,610 OK. 9 00:00:16,620 --> 00:00:23,480 One two three four five but now we have these up get child count. 10 00:00:23,490 --> 00:00:24,050 OK. 11 00:00:24,120 --> 00:00:25,990 So these are Titaniums. 12 00:00:26,000 --> 00:00:31,890 ARA is actually two dimensional Ali and these are areas that are actually inside of this Arey are actually 13 00:00:31,890 --> 00:00:33,350 the rose of this arm. 14 00:00:33,510 --> 00:00:39,480 And these values that are inside of these are these are the columns of this Ari. 15 00:00:39,690 --> 00:00:40,280 OK. 16 00:00:40,530 --> 00:00:47,220 These two men two dimensional array is actually an array of arrows and we have our rows and columns 17 00:00:47,220 --> 00:00:48,300 inside of this arii. 18 00:00:48,360 --> 00:00:48,850 OK. 19 00:00:49,020 --> 00:00:54,840 So the rules are these are areas of the inside of these two dimensional array and the columns are the 20 00:00:54,840 --> 00:00:57,460 values that are inside of this address. 21 00:00:57,510 --> 00:00:58,060 OK. 22 00:00:58,200 --> 00:01:04,810 So here again we actually want to return the count of these type names two dimensional array. 23 00:01:04,830 --> 00:01:09,670 First of all I need to access the address that are inside of these child names a. 24 00:01:09,700 --> 00:01:10,110 OK. 25 00:01:10,170 --> 00:01:15,390 So before you actually use this type of names that lenth method. 26 00:01:15,480 --> 00:01:21,700 So if it is going to actually return the number of areas that are inside of these are type 2 dimensional 27 00:01:21,770 --> 00:01:22,140 array. 28 00:01:22,140 --> 00:01:24,620 OK so the number of arrays are actually 5. 29 00:01:24,620 --> 00:01:30,630 OK if you have 5 arrays inside of these two dimensional array one two three four or five. 30 00:01:30,630 --> 00:01:31,040 OK. 31 00:01:31,170 --> 00:01:37,680 But we want to actually return the values that are inside of this arrow if you want to return the count 32 00:01:37,740 --> 00:01:42,420 the number of elements that are inside of these these rows. 33 00:01:42,450 --> 00:01:46,710 These are those that are inside of these child names two dimensional arii. 34 00:01:46,860 --> 00:01:54,770 So here instead of just writing style names that lenth here over I need to actually write in child names. 35 00:01:54,840 --> 00:01:58,280 Sop up group position. 36 00:01:58,290 --> 00:02:00,680 So we have this group position as an argument. 37 00:02:00,980 --> 00:02:01,500 OK. 38 00:02:01,680 --> 00:02:08,310 That's lenth So in this way it can actually go inside of this child names two dimensional array and 39 00:02:08,310 --> 00:02:14,490 then it can actually go inside of these days and then it's going to ask you to return the length of 40 00:02:14,520 --> 00:02:15,870 the columns. 41 00:02:15,900 --> 00:02:16,660 OK. 42 00:02:16,810 --> 00:02:21,070 The length of the columns that are inside of these child names are two dimensional arii. 43 00:02:21,170 --> 00:02:22,000 OK. 44 00:02:22,320 --> 00:02:24,970 So that was the cause of that area. 45 00:02:25,130 --> 00:02:25,740 OK. 46 00:02:25,860 --> 00:02:29,930 So this is the right implementation for this children count. 47 00:02:30,240 --> 00:02:38,820 But I I wanted to actually show you that if we actually incorrectly access the incorrect elements of 48 00:02:39,030 --> 00:02:42,370 our two dimensional arrays the error is going to happen. 49 00:02:42,420 --> 00:02:42,940 OK. 50 00:02:43,080 --> 00:02:50,340 A bug would actually appear in our application and you need to fix that bug in order to get your application 51 00:02:50,580 --> 00:02:51,680 to continue running. 52 00:02:51,720 --> 00:02:52,350 OK. 53 00:02:52,620 --> 00:02:56,730 So let's actually run our project again and see what happens. 54 00:02:56,730 --> 00:02:59,340 So as you can see here again our application is running. 55 00:02:59,580 --> 00:03:04,980 And we have this support group view and we have these children of this sport group view. 56 00:03:05,120 --> 00:03:05,770 OK. 57 00:03:05,820 --> 00:03:09,070 And as you can see we have this computer group view here. 58 00:03:09,210 --> 00:03:13,330 So that let's actually click on it and let's see what happens OK. 59 00:03:14,080 --> 00:03:19,800 Computer And as you can see our application didn't crash OK because we actually fixed the bug. 60 00:03:20,100 --> 00:03:25,470 And as you can see if I click on these items that are inside of this computer group view we can actually 61 00:03:25,470 --> 00:03:26,650 see the stores here. 62 00:03:26,760 --> 00:03:27,440 OK. 63 00:03:27,780 --> 00:03:29,190 And you have this food. 64 00:03:29,190 --> 00:03:31,790 Ice cream banana car. 65 00:03:32,010 --> 00:03:33,110 Mercedes-Benz. 66 00:03:33,270 --> 00:03:37,670 And we have these TV Samsung TV and LG TV. 67 00:03:37,680 --> 00:03:38,730 OK. 68 00:03:38,820 --> 00:03:40,880 So hopefully that makes sense. 69 00:03:41,070 --> 00:03:43,880 And I think that's enough for this theater. 70 00:03:43,920 --> 00:03:47,740 And if you have any questions please post the discussion in the course. 71 00:03:47,820 --> 00:03:51,220 And thank you very much for watching and I'll see you in the next year. 72 00:03:51,270 --> 00:03:51,660 Tauriel.