1 00:00:00,180 --> 00:00:05,760 Welcome back and this video, we are going to implement the U.S. units so that they will work. 2 00:00:05,760 --> 00:00:09,480 So here these whole elements here, they don't do anything yet. 3 00:00:09,480 --> 00:00:11,010 And that's what we need to change. 4 00:00:11,190 --> 00:00:13,130 And therefore, we need to do two things. 5 00:00:13,140 --> 00:00:17,930 So one of them is to validate if there is valid data in those three. 6 00:00:18,270 --> 00:00:23,820 So similar to what we've done here where we validated, is there any data into two if there's none and 7 00:00:23,820 --> 00:00:24,590 don't do anything? 8 00:00:24,930 --> 00:00:30,590 And then the next thing we need to do is, of course, to also execute the BMI calculation. 9 00:00:30,600 --> 00:00:38,130 So once all of that is done and we calculate, then we, of course, want to calculate the BMI and accordingly 10 00:00:38,130 --> 00:00:45,190 display the data that is associated to that BMI score should be displayed. 11 00:00:45,480 --> 00:00:47,930 So let's go ahead and do that. 12 00:00:47,970 --> 00:00:49,980 You can, of course, try to do that yourself. 13 00:00:50,130 --> 00:00:52,580 You know, everything you need to know in order to do that. 14 00:00:52,590 --> 00:00:57,540 It's basically just copy and paste with a little bit of adjustment and that's it. 15 00:00:57,570 --> 00:00:58,770 So good luck with that. 16 00:00:59,850 --> 00:01:02,550 OK, I hope you tried it if you didn't. 17 00:01:02,580 --> 00:01:03,120 No worries. 18 00:01:03,130 --> 00:01:04,500 I'm just going to show you how it's done. 19 00:01:04,769 --> 00:01:12,720 So, first of all, we go all the way back to this method here, validate metric units. 20 00:01:13,530 --> 00:01:17,790 Now, what I'm going to do is I'm going to do the same thing for the US units. 21 00:01:17,790 --> 00:01:21,090 So I'm just going to say validate US units. 22 00:01:23,450 --> 00:01:32,030 And this one is going to have the same thing, except for now it's going to be etty at a text and here 23 00:01:32,390 --> 00:01:33,260 we have two different ones. 24 00:01:33,260 --> 00:01:42,410 So you just, you know, tight fit is empty then else if it is, you know, height, inch is empty. 25 00:01:42,740 --> 00:01:44,070 And then we have another else. 26 00:01:44,090 --> 00:01:44,780 If you're. 27 00:01:46,040 --> 00:01:53,030 ET, U.S.A. and I was white is empty, so text to string. 28 00:01:54,990 --> 00:02:03,480 Is empty, if that is the case, then said is valid to false because otherwise it's going to stay true 29 00:02:03,930 --> 00:02:09,060 and you can see already we can replace it with an when. 30 00:02:09,270 --> 00:02:10,979 So now prefers when. 31 00:02:11,220 --> 00:02:16,880 You can, of course, use when here you can see, then it will make it this beautiful as you see here. 32 00:02:16,890 --> 00:02:21,990 It's going to use a lambda expression here to make it even more beautiful. 33 00:02:22,350 --> 00:02:26,040 OK, so whatever you prefer, I'm old fashioned. 34 00:02:26,040 --> 00:02:27,720 I like this if l stuff. 35 00:02:27,720 --> 00:02:33,360 But of course I have to say it looks pretty nice to have this one statement. 36 00:02:34,440 --> 00:02:36,270 OK, so that's validate US units. 37 00:02:36,270 --> 00:02:37,070 That's number one. 38 00:02:37,080 --> 00:02:38,910 I will return a boolean either. 39 00:02:40,020 --> 00:02:48,300 Everything was entered or in each of them, there is an entry or there is not, and then in the uncreate 40 00:02:48,300 --> 00:02:48,790 function. 41 00:02:49,500 --> 00:02:54,930 So all the way up here in uncreate, we have this button calculate units. 42 00:02:55,200 --> 00:03:03,750 So I know it's already pretty full, a bunch of stuff in here, but we're going to extend that even 43 00:03:03,750 --> 00:03:04,160 further. 44 00:03:04,170 --> 00:03:10,290 You could, of course, go ahead and make an extra function to keep your uncreate super tidy and clean. 45 00:03:10,560 --> 00:03:12,060 But that's open to you. 46 00:03:12,060 --> 00:03:13,440 If you want to do that, that's fine. 47 00:03:13,560 --> 00:03:17,190 But I'm just going to put everything in this unclick listener in here. 48 00:03:17,580 --> 00:03:22,380 So now we need to before we do that, check first if. 49 00:03:23,670 --> 00:03:28,830 The current visible view equals the metric. 50 00:03:30,170 --> 00:03:30,950 Units view. 51 00:03:31,960 --> 00:03:39,280 If that's the case, then do everything that you did before, because that was totally fine, but otherwise. 52 00:03:41,570 --> 00:03:49,070 You're going to be in the US system, so in this US unit view and then, of course, we want to do very 53 00:03:49,070 --> 00:03:51,500 similar things, but not exactly the same. 54 00:03:52,900 --> 00:04:02,110 So here we are also going to check if the entries are correct, so if valid date. 55 00:04:03,910 --> 00:04:05,660 Metric U.S. units. 56 00:04:05,680 --> 00:04:10,930 If that's true, then do something else right, a little toast. 57 00:04:13,120 --> 00:04:15,070 And it's going to be this toast here. 58 00:04:16,490 --> 00:04:22,870 OK, please enter a valid values and then, of course, what we want to do in here is the same as we 59 00:04:22,870 --> 00:04:23,240 did here. 60 00:04:23,260 --> 00:04:24,580 We want to get the Heidfeld. 61 00:04:24,580 --> 00:04:25,500 You want to get the weight? 62 00:04:25,510 --> 00:04:31,600 Well, you want to calculate a BMI, but things are a little different because now we have the height, 63 00:04:31,780 --> 00:04:37,110 not just being the centimeters, but actually defeat and inches. 64 00:04:37,570 --> 00:04:42,070 So in order to get all of those values, I'm just going to paste it in here. 65 00:04:42,310 --> 00:04:49,510 So it's going to be the unit, high value feet unit, high value inch unit weight value. 66 00:04:50,050 --> 00:04:53,110 And we get those and we make a string out of them. 67 00:04:54,450 --> 00:05:03,630 So out of the value, feed and value, we make a string and then out of the value that we get in the 68 00:05:03,630 --> 00:05:06,270 weight, that's what we make a float out of. 69 00:05:08,140 --> 00:05:13,420 Because even though it is a number that is entered in feet an inch, it's still going to be a string 70 00:05:13,420 --> 00:05:13,930 in the end. 71 00:05:16,360 --> 00:05:23,200 The next thing we need to do is to calculate the height value, the height value will be 12 times the 72 00:05:23,200 --> 00:05:25,270 feet plus the inch. 73 00:05:26,170 --> 00:05:28,690 So the following formula. 74 00:05:30,670 --> 00:05:38,950 So I'm just going to say height value is equal to US units, height, value and inch to float, plus 75 00:05:38,950 --> 00:05:46,950 the US units, high value and free to float at times 12 because 12 inch are one feet or one foot. 76 00:05:47,800 --> 00:05:52,930 And yeah, that's pretty much the formula here for the height value because we need that height value 77 00:05:53,170 --> 00:05:55,100 in order to calculate the BMI. 78 00:05:56,080 --> 00:05:58,580 So the calculation hereby is the following. 79 00:05:58,870 --> 00:06:04,900 So the formula for the BMI with the American system, you can find it here. 80 00:06:04,900 --> 00:06:12,610 It says the formula is seven hundred three times the weight in pounds and then the height in inch squared. 81 00:06:14,250 --> 00:06:17,160 OK, so the actual formula is the following. 82 00:06:18,420 --> 00:06:26,130 It's PMI is equal to seven hundred three times US unit weight value divided by height value multiplied 83 00:06:26,130 --> 00:06:28,880 with itself so high value squared. 84 00:06:29,760 --> 00:06:36,360 So that's the BMI and now we, of course, need to call this display BMI result function, which will 85 00:06:36,360 --> 00:06:42,390 then result in and displaying all of the BMI relevant information. 86 00:06:43,230 --> 00:06:44,590 OK, so that's already it. 87 00:06:44,700 --> 00:06:45,540 Let's try this. 88 00:06:45,690 --> 00:06:47,550 Let's run our application. 89 00:06:48,400 --> 00:06:49,570 All right, and there we are. 90 00:06:49,660 --> 00:06:51,590 So let's go ahead and calculate. 91 00:06:51,610 --> 00:06:56,420 So first of all, my weight in kilos and then the height in centimeters. 92 00:06:56,440 --> 00:06:57,340 Let's try again. 93 00:06:57,670 --> 00:06:59,420 Calculate twenty four point nineteen. 94 00:06:59,440 --> 00:07:01,170 OK, I was 16 actually. 95 00:07:01,420 --> 00:07:03,180 And now let's try the same thing here. 96 00:07:03,190 --> 00:07:10,290 So it's roughly 152 pounds and the height is five feet six roughly. 97 00:07:11,380 --> 00:07:13,540 And you can see the BMI is similar. 98 00:07:13,550 --> 00:07:15,520 So it's also twenty four point something. 99 00:07:15,960 --> 00:07:17,940 OK, so the calculation seems to work. 100 00:07:17,950 --> 00:07:24,910 Of course, feet and age are not as precise as centimeters are because one inch is roughly three centimeters. 101 00:07:25,220 --> 00:07:28,810 So that's why you will never get the same precision here. 102 00:07:29,380 --> 00:07:29,910 All right. 103 00:07:30,130 --> 00:07:31,000 So that was it. 104 00:07:31,030 --> 00:07:36,880 Now we can use the metric system and the U.S. system, both in order to calculate our BMI. 105 00:07:37,420 --> 00:07:42,190 The next pretty cool thing would be if we had a list of all the exercises that we've done, or at least 106 00:07:42,190 --> 00:07:45,330 of all the sessions that we finished and completed. 107 00:07:45,820 --> 00:07:48,480 Well, that's going to add in the next few videos. 108 00:07:48,520 --> 00:07:49,750 So see you in the next one.