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These are the user uploaded subtitles that are being translated: 1 1 00:00:01,260 --> 00:00:03,820 Welcome to the first coding challenge 2 2 00:00:03,820 --> 00:00:05,540 of this section. 3 3 00:00:05,540 --> 00:00:07,280 And as you can imagine, 4 4 00:00:07,280 --> 00:00:10,283 this one is gonna be all about functions. 5 5 00:00:12,190 --> 00:00:14,580 And we're back to the two gymnastic teams 6 6 00:00:14,580 --> 00:00:18,660 from the previous section, the Dolphins and Koalas. 7 7 00:00:18,660 --> 00:00:21,620 And now there is a new gymnastics discipline 8 8 00:00:21,620 --> 00:00:24,400 which works in a bit different way. 9 9 00:00:24,400 --> 00:00:26,130 So now in this new discipline, 10 10 00:00:26,130 --> 00:00:28,560 each team competes three times 11 11 00:00:28,560 --> 00:00:32,630 and then the average of the three scores is calculated, 12 12 00:00:32,630 --> 00:00:36,010 so each team will get one average score. 13 13 00:00:36,010 --> 00:00:38,040 And then a team only wins 14 14 00:00:38,040 --> 00:00:40,910 if it has at least doubled the average score 15 15 00:00:40,910 --> 00:00:45,060 of the other team and otherwise no team wins. 16 16 00:00:45,060 --> 00:00:48,810 So sounds pretty simple, I hope. 17 17 00:00:48,810 --> 00:00:53,120 And let's take a look at your tasks now. 18 18 00:00:53,120 --> 00:00:55,740 So first create an arrow function 19 19 00:00:55,740 --> 00:00:59,210 called calcAverage which calculates the average 20 20 00:00:59,210 --> 00:01:01,210 of three scores. 21 21 00:01:01,210 --> 00:01:03,640 And actually this calcAverage function 22 22 00:01:03,640 --> 00:01:07,670 should be able to calculate the average of any three values. 23 23 00:01:07,670 --> 00:01:10,610 So of course, the values don't have to be scores. 24 24 00:01:10,610 --> 00:01:14,440 Any random numbers will work just the same. 25 25 00:01:14,440 --> 00:01:16,730 So this is basically a generic function 26 26 00:01:16,730 --> 00:01:20,230 just to calculate the average of three values. 27 27 00:01:20,230 --> 00:01:21,960 Then use that function 28 28 00:01:21,960 --> 00:01:24,970 to calculate the average for both teams. 29 29 00:01:24,970 --> 00:01:26,300 And again, down here, 30 30 00:01:26,300 --> 00:01:29,063 you have the test data that you can use. 31 31 00:01:30,030 --> 00:01:32,660 Create a function called checkWiner 32 32 00:01:32,660 --> 00:01:36,990 which takes the average score of each team as parameters, 33 33 00:01:36,990 --> 00:01:37,970 and these parameters 34 34 00:01:37,970 --> 00:01:42,230 should be called average Dolphins here and average Koalas. 35 35 00:01:42,230 --> 00:01:45,480 And then based on these two average scores, 36 36 00:01:45,480 --> 00:01:48,090 the function will log the winner to the console 37 37 00:01:48,090 --> 00:01:51,060 together with the victory points. 38 38 00:01:51,060 --> 00:01:54,430 And that of course needs to happen according to the rule 39 39 00:01:54,430 --> 00:01:56,410 that I just explained before. 40 40 00:01:56,410 --> 00:01:57,880 So a team only wins 41 41 00:01:57,880 --> 00:02:00,730 if it has at least doubled the average score 42 42 00:02:00,730 --> 00:02:01,970 of the other team, 43 43 00:02:01,970 --> 00:02:04,290 and otherwise no team wins. 44 44 00:02:04,290 --> 00:02:06,560 So you need to check for that condition 45 45 00:02:06,560 --> 00:02:08,940 in order to print which team wins, 46 46 00:02:08,940 --> 00:02:12,350 and in some cases, no team might win at all. 47 47 00:02:12,350 --> 00:02:15,090 So you need to account for that as well. 48 48 00:02:15,090 --> 00:02:19,210 So here in point three you write to checkWiner function 49 49 00:02:19,210 --> 00:02:22,130 and then a number four you will use. 50 50 00:02:22,130 --> 00:02:24,930 So basically you will call the checkWinner function 51 51 00:02:24,930 --> 00:02:27,110 in order to determine the winner 52 52 00:02:27,110 --> 00:02:30,673 for both to test data one and test data two. 53 53 00:02:33,050 --> 00:02:34,840 I have some hints again, 54 54 00:02:34,840 --> 00:02:37,970 but if you want to try it on your own without the hints 55 55 00:02:37,970 --> 00:02:40,360 then just past the video right now. 56 56 00:02:40,360 --> 00:02:41,830 But if you need to hints 57 57 00:02:41,830 --> 00:02:43,883 then well, here they go. 58 58 00:02:44,880 --> 00:02:47,470 So this one is probably pretty obvious 59 59 00:02:47,470 --> 00:02:50,980 which is to calculate the average of three values, 60 60 00:02:50,980 --> 00:02:54,410 add them altogether and divide by three. 61 61 00:02:54,410 --> 00:02:57,650 But the second one here is a little bit more important 62 62 00:02:57,650 --> 00:03:01,380 and maybe more difficult for you to figure out on your own. 63 63 00:03:01,380 --> 00:03:06,280 So to check if number A is at least double number B, 64 64 00:03:06,280 --> 00:03:09,570 what you need to check is if A 65 65 00:03:09,570 --> 00:03:13,003 is greater or equal two times B. 66 66 00:03:14,746 --> 00:03:16,210 And so this is what you will use 67 67 00:03:16,210 --> 00:03:18,323 with the teams average scores. 68 68 00:03:19,210 --> 00:03:22,610 So it's important to keep this one in mind 69 69 00:03:22,610 --> 00:03:24,260 because of this rule, 70 70 00:03:24,260 --> 00:03:28,200 that the team only wins when it has doubled average score 71 71 00:03:28,200 --> 00:03:29,363 of the other team. 72 72 00:03:31,400 --> 00:03:33,630 Now, please make really sure 73 73 00:03:33,630 --> 00:03:36,730 that you understood everything I showed you about functions 74 74 00:03:36,730 --> 00:03:39,140 before you attempt this challenge. 75 75 00:03:39,140 --> 00:03:42,390 Because this one is not so straight forward, 76 76 00:03:42,390 --> 00:03:45,570 and so I don't want you to get frustrated. 77 77 00:03:45,570 --> 00:03:48,830 So again, please really make sure you understand functions 78 78 00:03:48,830 --> 00:03:52,400 and only then attempt to do this challenge. 79 79 00:03:52,400 --> 00:03:54,530 But if you feel that you're ready, 80 80 00:03:54,530 --> 00:03:56,230 then just pause the video now 81 81 00:03:56,230 --> 00:03:58,683 and good luck with this challenge. 82 82 00:04:03,330 --> 00:04:07,240 Let me show you my solution to this challenge, 83 83 00:04:07,240 --> 00:04:11,120 which I hope of course you were able to do on your own. 84 84 00:04:11,120 --> 00:04:12,280 So I'm gonna start 85 85 00:04:12,280 --> 00:04:15,963 with the calcAverage function as a number one, 86 86 00:04:16,940 --> 00:04:19,670 and remember that this should be an arrow function 87 87 00:04:19,670 --> 00:04:22,040 and it will receive three values 88 88 00:04:22,040 --> 00:04:24,510 so that it can calculate the average 89 89 00:04:24,510 --> 00:04:26,420 of these three numbers. 90 90 00:04:26,420 --> 00:04:28,220 And here I'm actually just gonna call 91 91 00:04:28,220 --> 00:04:32,330 the three numbers, A, B and C, 92 92 00:04:32,330 --> 00:04:35,480 because again, this is supposed to be just 93 93 00:04:35,480 --> 00:04:38,740 a generic function which can calculate averages 94 94 00:04:38,740 --> 00:04:40,550 of any three numbers, 95 95 00:04:40,550 --> 00:04:42,640 it doesn't have to be any scores. 96 96 00:04:42,640 --> 00:04:46,470 And so A, B, C are just generic variable names. 97 97 00:04:46,470 --> 00:04:48,860 But of course it's totally okay 98 98 00:04:48,860 --> 00:04:51,873 if you used more specific variable names. 99 99 00:04:53,640 --> 00:04:55,970 So adding all the three numbers together 100 100 00:04:55,970 --> 00:04:58,140 and then dividing by three. 101 101 00:04:58,140 --> 00:04:59,640 So this one is nothing new, 102 102 00:04:59,640 --> 00:05:02,330 this was just to basically test your knowledge 103 103 00:05:02,330 --> 00:05:05,170 of the syntax of the arrow function. 104 104 00:05:05,170 --> 00:05:06,920 So what's important to notice here 105 105 00:05:06,920 --> 00:05:08,770 is that we need to parenthesis here 106 106 00:05:08,770 --> 00:05:11,400 because we have multiple parameters, 107 107 00:05:11,400 --> 00:05:14,640 but then here, we only really have this line of code. 108 108 00:05:14,640 --> 00:05:18,570 And so therefore we don't need to even write the return. 109 109 00:05:18,570 --> 00:05:22,490 This value gets automatically returned from the function. 110 110 00:05:22,490 --> 00:05:24,010 And now let's just test it out 111 111 00:05:24,010 --> 00:05:26,600 before we move any further. 112 112 00:05:26,600 --> 00:05:31,600 So calcAverage and then let's just use some random numbers 113 113 00:05:32,190 --> 00:05:37,190 because here we know that this is supposed to be four. 114 114 00:05:37,966 --> 00:05:39,890 So we have three, four, five. 115 115 00:05:39,890 --> 00:05:41,480 And so the middle one here 116 116 00:05:42,390 --> 00:05:44,823 is the average between these three. 117 117 00:05:46,410 --> 00:05:50,430 And indeed it is, and so we know that our function works. 118 118 00:05:50,430 --> 00:05:53,370 And so we can move on to point number two, 119 119 00:05:53,370 --> 00:05:54,960 which is to use the function 120 120 00:05:54,960 --> 00:05:57,713 to calculate the average for both teams. 121 121 00:06:02,252 --> 00:06:04,580 So let's say score Dolphins 122 122 00:06:07,040 --> 00:06:08,580 is equal to calcAverage 123 123 00:06:09,970 --> 00:06:12,150 and now we pass into specific arguments 124 124 00:06:12,150 --> 00:06:15,760 for the three parameters, A, B and C. 125 125 00:06:15,760 --> 00:06:18,700 And so for test data one, which is this, 126 126 00:06:18,700 --> 00:06:22,170 so let me actually write that here, test one. 127 127 00:06:22,170 --> 00:06:27,170 So for the Dolphins, we pass into values 44, 23 and 71. 128 128 00:06:30,370 --> 00:06:34,020 Then for the Koalas, it works the same way. 129 129 00:06:34,020 --> 00:06:37,673 So score Koalas equals calcAverage. 130 130 00:06:40,403 --> 00:06:42,957 And now we have 65, 54 and 49. 131 131 00:06:47,150 --> 00:06:49,403 Nice reusable function right here. 132 132 00:06:50,460 --> 00:06:52,060 And so having this function, 133 133 00:06:52,060 --> 00:06:55,070 we don't need to calculate it here manually 134 134 00:06:55,070 --> 00:06:56,250 every single time. 135 135 00:06:56,250 --> 00:06:57,913 So that's really great. 136 136 00:06:59,170 --> 00:07:02,660 We can really appreciate the fact that again, 137 137 00:07:02,660 --> 00:07:06,690 a function is really like a machine in some sense. 138 138 00:07:06,690 --> 00:07:09,330 So it doesn't care where the inputs come from 139 139 00:07:09,330 --> 00:07:11,170 and where they go. 140 140 00:07:11,170 --> 00:07:14,740 All it does is to calculate the average of three numbers, 141 141 00:07:14,740 --> 00:07:18,030 no matter if it's scores or heights of people 142 142 00:07:18,030 --> 00:07:20,710 or money or whatever it is. 143 143 00:07:20,710 --> 00:07:23,340 So this function really is kind of isolated 144 144 00:07:23,340 --> 00:07:25,520 from the rest of the code here. 145 145 00:07:25,520 --> 00:07:28,500 It's a standalone function that we can then use 146 146 00:07:28,500 --> 00:07:30,830 for our own purposes. 147 147 00:07:30,830 --> 00:07:33,030 And that might sound pretty obvious, 148 148 00:07:33,030 --> 00:07:36,170 but it's actually important that you really internalize 149 149 00:07:36,170 --> 00:07:38,500 this aspect of functions. 150 150 00:07:38,500 --> 00:07:40,510 Only then can you really start 151 151 00:07:40,510 --> 00:07:45,180 to see the potential for functions everywhere in your code. 152 152 00:07:45,180 --> 00:07:47,990 Anyway, with that being said, 153 153 00:07:47,990 --> 00:07:51,280 let's now log these values to the console 154 154 00:07:53,280 --> 00:07:55,800 'cause I always like to see what I'm doing. 155 155 00:07:55,800 --> 00:07:58,173 So this part is of course not mandatory, 156 156 00:07:59,110 --> 00:08:01,910 but it's also nice to be able to know the scores 157 157 00:08:01,910 --> 00:08:03,840 so that we know if the logic 158 158 00:08:03,840 --> 00:08:06,963 that we're gonna implement next is working correctly. 159 159 00:08:07,820 --> 00:08:10,530 So we see that in this case, 160 160 00:08:10,530 --> 00:08:13,280 the Koalas have a score that is higher 161 161 00:08:13,280 --> 00:08:16,740 than one of the Dolphins but it's not double. 162 162 00:08:16,740 --> 00:08:19,330 And so we already know that in this case 163 163 00:08:19,330 --> 00:08:22,260 no team should be able to win, 164 164 00:08:22,260 --> 00:08:25,253 but let's not actually implement that functionality. 165 165 00:08:26,220 --> 00:08:29,120 So that's the function checkWinner. 166 166 00:08:29,120 --> 00:08:31,320 And so it takes the average Dolphins 167 167 00:08:31,320 --> 00:08:33,980 and average Koalas parameters 168 168 00:08:35,850 --> 00:08:38,280 and then it locks the winner to the console. 169 169 00:08:38,280 --> 00:08:40,033 So let's do that. 170 170 00:08:41,320 --> 00:08:42,910 And what's more, it's no problem 171 171 00:08:42,910 --> 00:08:44,803 if you did this differently. 172 172 00:08:46,930 --> 00:08:49,623 If you made it work then it's great. 173 173 00:08:51,150 --> 00:08:56,150 So average Dolphins and average Koalas. 174 174 00:08:59,460 --> 00:09:01,630 And now all they need to do is to check 175 175 00:09:01,630 --> 00:09:04,880 whether the Dolphins won or the Koalas won 176 176 00:09:04,880 --> 00:09:07,910 or if no one won basically. 177 177 00:09:07,910 --> 00:09:10,660 So when do the Dolphins win? 178 178 00:09:10,660 --> 00:09:11,770 Well, they win 179 179 00:09:11,770 --> 00:09:14,443 if they have doubled the points of the Koalas, 180 180 00:09:15,663 --> 00:09:16,713 that's the condition. 181 181 00:09:18,050 --> 00:09:20,200 So again, a team only wins 182 182 00:09:20,200 --> 00:09:22,840 if it has at least doubled the average score 183 183 00:09:22,840 --> 00:09:23,913 of the other team. 184 184 00:09:25,350 --> 00:09:27,650 And so that's why I told you here in this hint 185 185 00:09:28,916 --> 00:09:30,710 that this is how we check for that. 186 186 00:09:30,710 --> 00:09:34,560 So A has double the amount of points of B 187 187 00:09:34,560 --> 00:09:37,373 if A is greater than two times B. 188 188 00:09:38,930 --> 00:09:40,913 So let's do that. 189 189 00:09:42,730 --> 00:09:46,130 So average Dolphins greater 190 190 00:09:46,130 --> 00:09:50,467 or equal to two times the average Koalas. 191 191 00:09:52,640 --> 00:09:55,610 And in this case, we look to the console 192 192 00:09:59,480 --> 00:10:02,910 Dolphins win the trophy, 193 193 00:10:02,910 --> 00:10:04,600 let's use an emoji here again 194 194 00:10:05,510 --> 00:10:08,040 but you don't need of course to do that. 195 195 00:10:08,040 --> 00:10:09,223 So it's already here, 196 196 00:10:10,450 --> 00:10:14,023 and now it also told us to put the points. 197 197 00:10:16,750 --> 00:10:20,083 For example, 30 versus 13, 198 198 00:10:21,050 --> 00:10:24,220 so both points with the versus in between. 199 199 00:10:24,220 --> 00:10:27,390 So that's average Dolphins 200 200 00:10:32,170 --> 00:10:34,600 versus average Koalas. 201 201 00:10:34,600 --> 00:10:35,500 So you'll see that here 202 202 00:10:35,500 --> 00:10:38,730 we are also practicing all the other skills 203 203 00:10:38,730 --> 00:10:41,150 that we already acquired before. 204 204 00:10:41,150 --> 00:10:42,913 Especially in the previous section. 205 205 00:10:45,810 --> 00:10:48,810 Then now here we need to just need to do the opposite. 206 206 00:10:48,810 --> 00:10:50,193 So else if, 207 207 00:10:52,510 --> 00:10:57,110 and now if the Koalas half at least. 208 208 00:10:57,110 --> 00:11:00,160 So that's basically what this one here means. 209 209 00:11:00,160 --> 00:11:03,590 So greater equal is basically at least. 210 210 00:11:03,590 --> 00:11:04,823 So if average Koalas 211 211 00:11:04,823 --> 00:11:09,343 have at least double the points of the Dolphins, 212 212 00:11:11,110 --> 00:11:13,500 then the Koalas win. 213 213 00:11:13,500 --> 00:11:16,233 So that's just grab this one from here. 214 214 00:11:17,580 --> 00:11:22,440 Koalas and tier it's average Koalas, 215 215 00:11:22,440 --> 00:11:26,640 and then average Dolphins, average, yes. 216 216 00:11:30,620 --> 00:11:33,210 And now in any other case, 217 217 00:11:33,210 --> 00:11:35,800 we say that no one wins. 218 218 00:11:35,800 --> 00:11:38,063 So I think that's also said in the rules. 219 219 00:11:39,260 --> 00:11:41,150 Yeah, that's a number of five. 220 220 00:11:41,150 --> 00:11:44,280 I think I even forgot to tell you this one 221 221 00:11:44,280 --> 00:11:45,773 but hopefully you read it. 222 222 00:11:47,603 --> 00:11:52,010 So you should ignore draws in this exercise this time. 223 223 00:11:52,010 --> 00:11:53,620 So if none of these is true, 224 224 00:11:53,620 --> 00:11:55,563 we simply say that no team wins. 225 225 00:11:58,840 --> 00:12:01,933 No team wins. 226 226 00:12:04,560 --> 00:12:08,453 And now all we need to do is to call this function here. 227 227 00:12:09,380 --> 00:12:13,320 So checkWinner, and we will do that 228 228 00:12:13,320 --> 00:12:15,350 with score Dolphins 229 229 00:12:16,410 --> 00:12:19,833 and score Koalas. 230 230 00:12:22,500 --> 00:12:26,890 Let's recap, we calculated the score of the Dolphins up here 231 231 00:12:26,890 --> 00:12:28,890 and of the Koalas as well. 232 232 00:12:28,890 --> 00:12:33,521 And now we call the checkWiner function here 233 233 00:12:33,521 --> 00:12:35,410 and we use as arguments 234 234 00:12:35,410 --> 00:12:37,960 the scores that we calculated before 235 235 00:12:37,960 --> 00:12:41,470 and then score Dolphins will become average Dolphins 236 236 00:12:42,960 --> 00:12:44,130 here in this function, 237 237 00:12:44,130 --> 00:12:46,560 because that's the name of the parameter. 238 238 00:12:46,560 --> 00:12:48,740 And I see that I misspelled this, 239 239 00:12:48,740 --> 00:12:50,870 and so now I can use that command D 240 240 00:12:50,870 --> 00:12:53,400 that I talked to you about before, 241 241 00:12:53,400 --> 00:12:55,180 so I can select all of them. 242 242 00:12:55,180 --> 00:12:58,150 So command D, command D,command D, command D 243 243 00:12:58,150 --> 00:13:01,330 and now I can use all of these cursors here 244 244 00:13:01,330 --> 00:13:02,460 at the same time. 245 245 00:13:02,460 --> 00:13:06,340 So Dolphins you see, 246 246 00:13:06,340 --> 00:13:10,733 I inserted the P in all of the variable names everywhere. 247 247 00:13:14,140 --> 00:13:17,420 And so now this parameter name here gets used 248 248 00:13:17,420 --> 00:13:19,750 for all these calculations. 249 249 00:13:19,750 --> 00:13:23,970 And again, originally this value comes basically from here, 250 250 00:13:23,970 --> 00:13:27,850 from calculating the average of these three scores. 251 251 00:13:27,850 --> 00:13:30,040 So this average gets stored here 252 252 00:13:30,040 --> 00:13:31,990 then we use it here 253 253 00:13:31,990 --> 00:13:35,810 and then it gets basically transferred to average Dolphins 254 254 00:13:35,810 --> 00:13:38,213 and is then used everywhere in this function. 255 255 00:13:40,330 --> 00:13:41,860 So let's now test. 256 256 00:13:41,860 --> 00:13:44,400 And as we expected, no team wins 257 257 00:13:44,400 --> 00:13:46,400 because this team here 258 258 00:13:46,400 --> 00:13:50,330 even though it has more than the Dolphins, it's not double. 259 259 00:13:50,330 --> 00:13:52,293 And so therefore they do not win. 260 260 00:13:53,150 --> 00:13:56,450 Now of course, what is also important to mention here 261 261 00:13:56,450 --> 00:13:59,750 is that this checkWiner function here 262 262 00:13:59,750 --> 00:14:04,170 is also completely independent of these score values 263 263 00:14:04,170 --> 00:14:06,210 that we calculated earlier. 264 264 00:14:06,210 --> 00:14:09,230 So here we can simply call this function 265 265 00:14:09,230 --> 00:14:11,320 with completely different values. 266 266 00:14:11,320 --> 00:14:12,860 So the function doesn't care 267 267 00:14:12,860 --> 00:14:14,610 where do these values come from. 268 268 00:14:14,610 --> 00:14:18,360 So where average Dolphins and average Koalas come from. 269 269 00:14:18,360 --> 00:14:20,050 It's a standalone function 270 270 00:14:20,050 --> 00:14:23,200 and it doesn't care at all, where it is values came from. 271 271 00:14:23,200 --> 00:14:25,400 We can just plug in some random numbers here 272 272 00:14:26,950 --> 00:14:30,363 and then call it and let's use a smaller number here. 273 273 00:14:31,530 --> 00:14:34,120 So just to that, the average Dolphin here 274 274 00:14:34,120 --> 00:14:37,023 is actually more than double of the average Koalas. 275 275 00:14:38,776 --> 00:14:40,300 So if you run this now, 276 276 00:14:40,300 --> 00:14:45,300 then we see that the Dolphins win with 576 versus 111. 277 277 00:14:46,570 --> 00:14:48,330 And so that's exactly the numbers 278 278 00:14:48,330 --> 00:14:50,433 that we plugged in in here. 279 279 00:14:52,200 --> 00:14:55,000 So once more, it's important to keep in mind 280 280 00:14:55,000 --> 00:14:58,100 that these functions are all independent from another. 281 281 00:14:58,100 --> 00:15:00,820 We just happen to call checkWiner here 282 282 00:15:00,820 --> 00:15:03,320 with these values that we calculated before, 283 283 00:15:03,320 --> 00:15:05,400 but it's not mandatory to do that, 284 284 00:15:05,400 --> 00:15:08,600 any other values will work just as well. 285 285 00:15:08,600 --> 00:15:10,003 And so we proved that here. 286 286 00:15:11,020 --> 00:15:14,800 Anyway, now let's use test data two, 287 287 00:15:14,800 --> 00:15:16,060 and actually what I'm gonna do 288 288 00:15:16,060 --> 00:15:19,660 is to reassign these two scores here. 289 289 00:15:19,660 --> 00:15:21,260 So we calculate them first, 290 290 00:15:21,260 --> 00:15:23,660 then we call checkWinner 291 291 00:15:23,660 --> 00:15:26,050 and then I'm going to recalculate them 292 292 00:15:26,050 --> 00:15:27,723 and call checkWinner again. 293 293 00:15:28,816 --> 00:15:30,330 What I mean by saying that 294 294 00:15:30,330 --> 00:15:34,530 is that these need to be let variables 295 295 00:15:34,530 --> 00:15:37,093 so that we can reassign them, remember that? 296 296 00:15:38,270 --> 00:15:40,860 Const values cannot be mutated, 297 297 00:15:40,860 --> 00:15:42,153 they cannot be changed, 298 298 00:15:43,539 --> 00:15:45,530 and so they need to be let. 299 299 00:15:45,530 --> 00:15:49,350 And then here, of course, we need to get rid of the let, 300 300 00:15:49,350 --> 00:15:52,340 because we do not want to create new variables, 301 301 00:15:52,340 --> 00:15:54,050 we just want to overwrite. 302 302 00:15:54,050 --> 00:15:55,670 So we want to reassign 303 303 00:15:55,670 --> 00:15:57,683 the values that we had earlier. 304 304 00:15:59,290 --> 00:16:00,840 So this time the values 305 305 00:16:03,886 --> 00:16:05,643 are 85, 54 and 41. 306 306 00:16:12,276 --> 00:16:14,600 85, 54 and 41. 307 307 00:16:14,600 --> 00:16:16,680 And I hope that's correct. 308 308 00:16:16,680 --> 00:16:19,343 And then for the Koalas, 309 309 00:16:21,389 --> 00:16:24,233 we have 23, 34 and 27. 310 310 00:16:26,050 --> 00:16:30,843 So that's 23, 34 and 27. 311 311 00:16:33,450 --> 00:16:35,543 Let's lock these actually also, 312 312 00:16:39,082 --> 00:16:41,220 and then simply call checkWinner again, 313 313 00:16:41,220 --> 00:16:42,820 and now with the new values 314 314 00:16:42,820 --> 00:16:46,883 of score Dolphins and score Koalas that we just reassigned. 315 315 00:16:50,096 --> 00:16:51,803 So let's see. 316 316 00:16:52,870 --> 00:16:55,850 And now the Dolphins seven average score of 60 317 317 00:16:55,850 --> 00:16:57,610 and to Koalas of 28. 318 318 00:16:57,610 --> 00:16:59,960 And so now the Dolphins win 319 319 00:16:59,960 --> 00:17:03,150 with a 60 versus 28. 320 320 00:17:03,150 --> 00:17:05,240 So that's a close call. 321 321 00:17:05,240 --> 00:17:07,470 So if the Koalas had three more points 322 322 00:17:07,470 --> 00:17:09,030 then no one would win, 323 323 00:17:09,030 --> 00:17:11,433 but the Dolphins managed to do it. 324 324 00:17:12,740 --> 00:17:17,740 Great, I hope that this all made sense to you, 325 325 00:17:18,330 --> 00:17:20,530 and I know it is probably still 326 326 00:17:20,530 --> 00:17:23,200 a bit confusing at this point. 327 327 00:17:23,200 --> 00:17:25,320 And if you did some things differently 328 328 00:17:25,320 --> 00:17:28,510 well then once more data's completely okay. 329 329 00:17:28,510 --> 00:17:29,890 It just means you're developing 330 330 00:17:29,890 --> 00:17:33,100 your own coding style over time. 331 331 00:17:33,100 --> 00:17:35,940 For example, here with the average scores, 332 332 00:17:35,940 --> 00:17:39,230 of course you could have created new variables down here 333 333 00:17:39,230 --> 00:17:41,300 for the test data too. 334 334 00:17:41,300 --> 00:17:42,910 So that's just one of many things 335 335 00:17:42,910 --> 00:17:44,740 that you could have done differently 336 336 00:17:44,740 --> 00:17:46,190 which are perfectly fine. 337 337 00:17:46,190 --> 00:17:50,100 As long as your results are the same, you're good to go. 338 338 00:17:50,100 --> 00:17:53,210 So take some time and review this lecture. 339 339 00:17:53,210 --> 00:17:55,620 Remember that you can check out my final code 340 340 00:17:55,620 --> 00:18:00,350 also in the final folder and the GitHub repo, 341 341 00:18:00,350 --> 00:18:04,610 and then you're ready to move on to our next big topic 342 342 00:18:04,610 --> 00:18:05,780 in the section, 343 343 00:18:05,780 --> 00:18:07,630 which is gonna be arrays. 344 344 00:18:07,630 --> 00:18:09,623 So I hope to see you there soon. 29137