Remaining Tries

All right. 0:00 So our next ticket in order of priority is this, as a guesser I should 0:01 know how many remaining tries I have left so I am encouraged to be cautious. 0:06 So basically this implies that we're going to need to allow multiple guesses through 0:11 some sort of loop until they run out of tries. 0:15 Now in order to do that we'll have to set a limit. 0:18 That limit seems like something we want to make publicly available and 0:22 it's related to all games and it shouldn't change. 0:26 We know how to do that. 0:29 Let's make a constant. 0:30 Let's sketch out the remaining tries logic real quick. 0:32 So a standard hangman game allows you to miss seven times. 0:36 So let's look at a game in progress. 0:40 So a t and an h were a hit and z and w were incorrect guesses. 0:42 So therefore if we count how many misses they've made and subtract that 0:48 from the total amount of tries, we should know how many tries remain. 0:52 Here there are seven misses allowed and there have been two bad guess so 0:56 seven minus two is five. 1:00 So there are five tries remaining and if we guess why it appends the misses and 1:02 now there are three misses and 7- 3 = 4. 1:07 So there is four guesses left. 1:10 All right let's do this. 1:12 Okay so let's move our remaining tries take it into in progress. 1:14 All right, so let's go and set our guess limit. 1:21 This is definitely public and we want it to be true of all games. 1:26 So let's expose it off of the class. 1:31 So we'll make that static. 1:33 And we definitely don't want to change, right. 1:35 I don't want anybody cheating. 1:38 So that's final. 1:39 It's an integer and because it's a constant, 1:40 let's make the name all capitals. 1:42 So we'll do max under misses. 1:45 So like we said seven is the standard number of tries. 1:48 Now let's write some code that exposes how many tries are left. 1:52 I'm gonna start Jshell up down here. 1:56 So again that code was max misses allowed minus how many misses they have made. 1:57 But, how do we count the amount of misses? 2:05 So, because it is a string 2:08 we can use a new method that you might not have seen before. 2:09 So we'll say string.example = 'hello'. 2:11 You want .example. 2:19 So now if we do example.link, we'll see that there were 5. 2:27 So that will work because we'll know how many misses are there because our string 2:33 will be that long. 2:37 Cool. 2:39 So in the game object let's go ahead and make a new computed property right. 2:39 So we want to be public because we want people to use it. 2:45 And it's going to return a number and 2:49 let's call it getRemainingTtries and this lines up with the user story. 2:52 And so what do we wanna do? 2:56 We wanna return here, 2:58 we wanna return that max misses that we just made, that's how many were there, 2:59 minus the misses and because it's a string we'll just use that length property there. 3:04 Cool. 3:09 Okay so now that we have it, let's make our display progress get upgraded. 3:10 Let's put it in there. 3:15 So let's say you have %d. 3:17 And now %d is where you wanna show numbers in a string formatter. 3:22 I put some more in the teacher's notes about this. 3:27 But, you want %D, and D stands for decimal there. 3:29 So, you have %D tries left to solve and 3:32 then here we go and then %S will still stay there. 3:38 So, if there's two string formatters, the first will say game.getRemainingTries and 3:41 we'll call that into a comma. 3:48 There we go. 3:49 So now it will push that remaining tries count that we have in there. 3:50 So now let's build a loop that will just keep asking 3:54 while there are remaining attempts. 3:58 Now the specific story doesn't talk about what to do with a win. 4:01 So let's not handle that case yet. 4:06 Let's let the next person who picks up the next story deal with that. 4:08 Now this is a good development practice. 4:11 Limit your scope to the story that you're working on. 4:13 This way you don't have to run into other developers who might pick up the next 4:15 ticket and implement things differently than you might have. 4:18 Let's see what does that code look like. 4:22 Let's go ahead and let's get rid of this testing code that we're doing here before. 4:23 I gonna get rid of story aim and story in the variable. 4:29 So we have these two things and we wanna loop. 4:32 So what can we say, we said while we've got remaining tries, 4:34 so while game.getRemainingTries is greater than zero. 4:41 Right. 4:49 As long as there is more than zero tries left you can still keep playing. 4:49 So we'll go ahead and 4:53 move these in here. 4:57 Here we go, that should do it. 5:08 Let's bring this up, let's hit CTRL D, and let's see if it's here. 5:09 It's not, okay. 5:17 So, we'll say clear & javaC 5:17 Hangman.java & java hangman. 5:22 Okay here we go. 5:28 Awesome so it says we have seven tries left to solve which is right. 5:31 And let's see, let's guess T. 5:34 Cool so it didn't go down because we didn't miss but let's miss. 5:37 And then let's miss again. 5:40 And let's miss again, and see they're going down and it's right, so 5:42 now if we guess it should stay at four, it's that. 5:46 I just can't get this one. 5:49 What is it? 5:50 It's a Q, it's probably a Q. 5:51 You always guess Q, right? 5:52 So, uh-oh, oop there you go. 5:54 So it ran out. 5:59 So the loop finish when we're done. 5:59 I think we can go ahead and consider this one done-zo. 6:01 Hey, it's starting to look like a game and we're so close, only two stories left. 6:05 A good lesson that we learned here is that by only completing the task as required by 6:12 the story we had a good stopping point. 6:17 In case project scope or requirements for our NVP changed. 6:19 We're still on target, but 6:22 we could in fact bring in more people if we hit a time crunch. 6:24 Breaking down stories in the sane technical tasks takes a certain amount of 6:27 effort and finesse. 6:30 But it almost always pays off in the end. 6:31 Speaking of a stopping point, you've done an awful lot in this stage and 6:34 I think we should wrap this one up. 6:38 We've got an app-ish looking app and you deserve to take a break. 6:39 Give yourself a huge pat on the back. 6:42 You're mastering using Java objects and picking up some more core Java skills. 6:44 You're doing great. 6:48 Way to stick with it. 6:50 I've thrown a lot of information at you and you're processing it. 6:51 I am super impressed. 6:54 Of course though, you don't need me to tell you all that, because you've been 6:55 proving it yourself by rocking these exercises I keep throwing at you. 6:59 Like this final one for this stage. 7:02