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The Big Programming Thread - Page 197
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Thread Rules 1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution. 2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20) 3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible. 4. Use [code] tags to format code blocks. | ||
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Craton
United States17284 Posts
Clean - Remove existing compiled files Rebuild - Clean + Build | ||
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kaykaykay
Singapore637 Posts
Hi Frigo, How do you use a class diagram to help you write codes? I've no idea where to start.  ![[image loading]](http://i385.photobucket.com/albums/oo292/20pointer/classfieldsobjects.png) | ||
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Craton
United States17284 Posts
Just make classes for each block with the relevant properties and methods. It also has the flow of which classes should be calling which. One class would be HappyFamilyGame which would have an array[5] of class Player and a method start() which takes nothing and returns nothing (i.e. void). | ||
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tec27
United States3702 Posts
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FFGenerations
7088 Posts
2. cool tip 3. also cool, we have touched on arrays but not mentioned lists i have C# assignment to do next (2 weeks i think) , look forward to organising myself better | ||
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kaykaykay
Singapore637 Posts
Required Functionalities: User registration of up to five players (A to E). Player's name must be three to eight characters. Shuffle the 48 cards randomly.Distribute the cards equally to each of the registered players. A difference of one card between players is acceptable. Display all players with all the cards that have been given to them. Coding Restrictions: You must use simple (1-D) arrays . You are not allowed to use ArrayLists or LinkedLists. You are not allowed to implement any form of GUI. (E.g. Swing, AWT, etc.) | ||
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Blisse
Canada3710 Posts
On November 17 2012 16:23 kaykaykay wrote: Oh right. Forgot to add this. Required Functionalities: User registration of up to five players (A to E). Player's name must be three to eight characters. Shuffle the 48 cards randomly.Distribute the cards equally to each of the registered players. A difference of one card between players is acceptable. Display all players with all the cards that have been given to them. Coding Restrictions: You must use simple (1-D) arrays . You are not allowed to use ArrayLists or LinkedLists. You are not allowed to implement any form of GUI. (E.g. Swing, AWT, etc.) First off, we are not here to do your assignment for you. We can help in debugging if you've given up on life after 8 hours on one bug, or if you've been stumped on a specific implementation and have exhausted your coffee supply, or if you have any secondary, more abstract questions about your work. This is not a homework thread, but most of the time, we'll give you the benefit of the doubt when you need some help, that you've actually been staring at this problem and trying to code for hours and making no progress. But at the moment, you really make it seem like you just want us to complete it for you. If this is your first programming assignment ever and you're not planning to be in a Computer Science relevant industry, then I feel for you, but it's very unlikely that the teacher just threw you into here without teaching you incrementally all the required steps. You are given the entire class diagram, which involves several classes, what functions should exist in each class, what those functions should do, and how they interact with each other. Your only job is to decide on an appropriate data structure to use for each class implementation, implement each function, and then link them all together in a main loop. Your class implementation is already restricted for you; you can't use ArrayLists or LinkedLists. Ask yourself, what's left? You function implementations begin at the simplest level, in this case, the lowest class in the class diagram, the card. Implement all the functions of the card, then test that they do what they're required to do. Once you're done that level, move up another step to a higher level, where each step up uses the new classes that you've implemented. Unless you have a lot of experience, you cannot implement a class without implementing the classes that it depends on. How can you dealCards() if you haven't created the structure for a Deck and Card yet? The class diagram gives you a visual representation of how to implement the solution to a problem, which is a Happy Family Game in this case. They help you by simplifying the "what to implement and their relationships" portion and let you focus on "how to implement," once you've verified that the diagram is correct. All of your restrictions should be fairly obvious with how they fit into the class diagrams. | ||
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kaykaykay
Singapore637 Posts
On November 17 2012 16:52 Blisse wrote: First off, we are not here to do your assignment for you. We can help in debugging if you've given up on life after 8 hours on one bug, or if you've been stumped on a specific implementation and have exhausted your coffee supply, or if you have any secondary, more abstract questions about your work. This is not a homework thread, but most of the time, we'll give you the benefit of the doubt when you need some help, that you've actually been staring at this problem and trying to code for hours and making no progress. But at the moment, you really make it seem like you just want us to complete it for you. If this is your first programming assignment ever and you're not planning to be in a Computer Science relevant industry, then I feel for you, but it's very unlikely that the teacher just threw you into here without teaching you incrementally all the required steps. You are given the entire class diagram, which involves several classes, what functions should exist in each class, what those functions should do, and how they interact with each other. Your only job is to decide on an appropriate data structure to use for each class implementation, implement each function, and then link them all together in a main loop. Your class implementation is already restricted for you; you can't use ArrayLists or LinkedLists. Ask yourself, what's left? You function implementations begin at the simplest level, in this case, the lowest class in the class diagram, the card. Implement all the functions of the card, then test that they do what they're required to do. Once you're done that level, move up another step to a higher level, where each step up uses the new classes that you've implemented. Unless you have a lot of experience, you cannot implement a class without implementing the classes that it depends on. How can you dealCards() if you haven't created the structure for a Deck and Card yet? The class diagram gives you a visual representation of how to implement the solution to a problem, which is a Happy Family Game in this case. They help you by simplifying the "what to implement and their relationships" portion and let you focus on "how to implement," once you've verified that the diagram is correct. All of your restrictions should be fairly obvious with how they fit into the class diagrams. Firstly yes I did post for help because I thought you guys could give me a headups on where to start. But I never told nor expected anyone to do it for me. If you noticed, I asked if anyone was good at OOP, before asking for help. Nevertheless I'm sorry if I made it seem that way to you. Secondly, I posted the coding restrictions because tec27 mentioned ArrayLists and it was only right to inform him that I couldn't use that. Not for anyone to do my assignment for me. Thirdly, yes it's my first assignment. Lastly, thanks for telling me that I should start coding at the Card class because it is the lowest class. It was all I really needed. Edit: When you say appropriate data structure to use for each class implementation, you mean either Int, Str, Double etc.. Yeah? | ||
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tec27
United States3702 Posts
On November 17 2012 16:03 FFGenerations wrote: 1. where should the stuff in Helper be then? just stuff in the Main? (or HappyFGame?) 2. cool tip 3. also cool, we have touched on arrays but not mentioned lists i have C# assignment to do next (2 weeks i think) , look forward to organising myself better For the Helper stuff, you should generally find a better abstraction for it. That class in particular looks to be for converting strings to other types, so it might just be a matter of naming (it might be better called StringConverter or something along those lines). If its meant to read multiple things out of the same string (IE: like the Scanner class in Java) then you'd want to have some sort of state kept internally, as well as a different name. Basically you want to name things such that other people (and yourself after you write it) can understand very clearly what functionality belongs in a class and what doesn't. A name like 'Helper' can apply to just about anything, so you end up with a ton of unrelated stuff in it eventually. | ||
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supereddie
Netherlands151 Posts
Ofcourse, you can create the clever stuff if you want, just don't turn it in. Unless you want to get into a hefty discussion... | ||
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Blisse
Canada3710 Posts
On November 17 2012 17:27 kaykaykay wrote: Firstly yes I did post for help because I thought you guys could give me a headups on where to start. But I never told nor expected anyone to do it for me. If you noticed, I asked if anyone was good at OOP, before asking for help. Nevertheless I'm sorry if I made it seem that way to you. Secondly, I posted the coding restrictions because tec27 mentioned ArrayLists and it was only right to inform him that I couldn't use that. Not for anyone to do my assignment for me. Thirdly, yes it's my first assignment. Lastly, thanks for telling me that I should start coding at the Card class because it is the lowest class. It was all I really needed. Edit: When you say appropriate data structure to use for each class implementation, you mean either Int, Str, Double etc.. Yeah? That's okay, I did notice someone ask, but I didn't recognize that it was you. All I saw was a big diagram, and a listing of requirements. My bad. At the very least, it keeps everyone honest, which is nice. By structure, I meant choosing a data structure where not explicitly stated, specifically between ArrayLists and LinkedLists, though I believe there aren't many cases where ArrayLists are even used, and LinkedLists are overkill in this application. Not a real big Java programmer myself, so I can only be of limited help there. Make sure you follow the exact guidelines your professor gave. | ||
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tec27
United States3702 Posts
On November 17 2012 18:06 Blisse wrote: That's okay, I did notice someone ask, but I didn't recognize that it was you. All I saw was a big diagram, and a listing of requirements. My bad. At the very least, it keeps everyone honest, which is nice. By structure, I meant choosing a data structure where not explicitly stated, specifically between ArrayLists and LinkedLists, though I believe there aren't many cases where ArrayLists are even used, and LinkedLists are overkill in this application. Not a real big Java programmer myself, so I can only be of limited help there. Make sure you follow the exact guidelines your professor gave. ArrayLists are used a helluva lot in Java  Anyway, I wasn't saying you *should* used lists for this assignment, just that your instructor is dumb and is setting a bad example for you. A really bad example. Do what it takes to complete the assignment and then purge all of his shitty design and shitty type usage from your mind. | ||
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Blisse
Canada3710 Posts
On November 17 2012 18:55 tec27 wrote: ArrayLists are used a helluva lot in Java What's the difference between ArrayLists, LinkedLists, and Lists? o: | ||
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heishe
Germany2284 Posts
On November 17 2012 19:30 Blisse wrote: What's the difference between ArrayLists, LinkedLists, and Lists? o: I haven't programmed Java a lot so AFAIK List is just the base class for ArrayList and LinkedList, but no guarantee for that. LinkedList and ArrayList are the same in usage and behavior, they just differ in how they're implemented internally. In short: ArrayList is always faster on modern machines, so never used LinkedList. | ||
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tec27
United States3702 Posts
On November 17 2012 19:30 Blisse wrote: What's the difference between ArrayLists, LinkedLists, and Lists? o: List is just an interface for any type of list of things (so both ArrayList and LinkedList implement List). ArrayList is a dynamically sized array (basically, a data structure backed by an array that keeps track of its size. When the size would have to exceed the array size, it allocates a new array with a larger size (generally the size doubles each time, but its implementation dependent, I'm not sure what the specs are for Java's)). LinkedList is a list backed by (obviously) a linked list. So ArrayList has constant time access by index, on average constant time appending, and more expensive insertions/deletions. LinkedList would have constant time insertion/deletion, and then more expensive access by index. | ||
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Nitro68
France470 Posts
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MisterD
Germany1338 Posts
On November 16 2012 22:01 flabbert wrote: dumb of me! how do i manage 2 sockets in 1 while loop? example: + Show Spoiler + $socket = ircconnection; $socket2 = csgoserverconnection; while (!feof($socket) || !feof($socket2)) { do stuff } i assume you want to terminate when either socket goes dead, so you'd have to do !feof($socket) && !feof($socket2) ;P A quick google tells me there don't appear to be established standard patterns for doing this, so i guess the best you can do is switch to a while(true), to individual if(feof($socket)) {close($socket2); break;} and vice versa and then just handle reading for either sockets with a "if there is data, otherwise handle other socket" and not "wait until there is data (and ignore the other socket for that duration)". I haven't touched php in ages, so i can't give you a proper explanation for that, just a general answer. Maybe someone else can do better, but otherwise i'd say just try around a bit and if you encounter a more specific problem ask about that. | ||
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fabiano
Brazil4644 Posts
On November 17 2012 10:45 kaykaykay wrote: + Show Spoiler + Hi Frigo, How do you use a class diagram to help you write codes? I've no idea where to start. What is the difference between a dotted arrow (like the one between Helper and HappyFamilyGame) and a solid arrow in association? | ||
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MisterD
Germany1338 Posts
![[image loading]](http://www.holub.com/goodies/uml/images/dependency.gif) Dependency. User uses Resource, but Resource is not a member of (field in) the User class. If Resource is modified, some method of User might need to be modified. Resource is typically a local variable or argument of some method in User. The line is typically stereotyped (e.g. «creates» «modifies») ![[image loading]](http://www.holub.com/goodies/uml/images/navigability.gif) Navigability Messages flow in direction of arrow (only). An unmarked line is "unspecified" navigability. An X indicates non-navigable (Uml 2.0). Typically, if a role is specified, then navigability in the direction of that role is implicit. If an object doesn't have a role in some relationship, then there's no way to send messages to it, so non-navigability is implicit. so in essence, the Game uses the helper class internally, but it consists of players, decks and cards and given a game instance, you can access it's players, decks and cards, but not it's helper. solid arrow means "if you deal with X, you'll also deal with Y", dashed arrow means "if you want to use X, Y is used as well, but you don't need to concern yourself with it". | ||
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fabiano
Brazil4644 Posts
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