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• Multiplayer in a game. How to design it object wise?

  - by Ninetou

  I was suggested on StackOverflow to ask this question here. I'm working on a simple game and I was thinking of adding multiplayer feature but I'm a bit stuck. I'm not sure what approach should I take, keeping in mind good programming practices. I have a Player object which is created for each player but then I have many other classes that would have to be able to access them. The thing is, if I initialise them in, let's say my main method, then I can't relate to different instances of player class from other classes. The only solution to my problem that comes to my mind is using some form of global objects but afaik using anything globally in apps is usually not a good practice. Any suggestions/ideas?

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• 3 threads printing numbers of different range

  - by user875036

  This question was asked in an Electronic Arts interview: There are 3 threads. The first thread prints the numbers 1 to 10. The second thread prints the numbers 11 to 20. The third thread prints the numbers from from 21 to 30. Now, all three threads are running. The numbers are printed in an irregular order like 1, 11, 2, 21, 12 etc. If I want numbers to be printed in sorted order like 1, 2, 3, 4..., what should I do with these threads?

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• Running Visual Studio 2012 on a convertable windows 8 tablet? [closed]

  - by Tony

  I was unsure on where to post this question so I am posting here. I was wondering if any of you are using one of the new windows 8 convertible tablets to do web development on? If so what model are you using and how do you find the experience? I have a monster gaming laptop that I usually use to develop on but it is so large and is a real pain to move around with. I would like something that is extremely portable and would effectively let me develop anywhere.

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• How do you manage all of the information you have learned and found? [closed]

  - by B Seven

  Possible Duplicate: How do you manage your knowledge base? What do you use for personal note taking to keep track of everything you learn? Are you always Googling or searching StackOverflow to answer the same questions? Or searching for and copying and pasting existing code? I feel like I have a poor memory, especially remembering things like syntax. Are there any knowledge management systems that would work well for a programming language or operating system? It would be great if there were a way to save everything I learn in an easy to search system. Does such a thing exist? Maybe you would be able to search by question (How to sort an array?, How to set static IP?), or by tag (sort, array, enumeration, iterator, IP). I know it would be easy to develop my own system, but I thought it would be great to learn what works for other people.

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• Is it necessary to memorize code?

  - by AAA

  I am a new developer, who just got hired at a big company. I don't know how but I guess they are desperate. However, I am well-versed with HTML5/CSS3 though things change and new things are released and I keep up with as much as I can. But this job required me to hand-code Javascript, know Jquery and Ajax. I have been exposed to this a bit but I am not sure if I can hand-code Javascript. My question is, is it necessary to memorize all there is about Javascript or are there a few key things that I should know how to hand-code because looking at javascript code it seems there are lots of lines code! Please point me in the right direction.

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• Wireless hardware is not getting switched on in 12.04

  - by user89733

  I have recently installed ubuntu 12.04 in sony vaio VPCEH. And updated all the available updates through update manager. When i switch on the bluetooth/wireless (hardware switch), only the bluetooth is turning on. For wireless, it shows as "hardware disabled". P.S: It was working fine few days before. Suddenly It is not turning on. i just get an answer for this question while googling. just enter the following command in the terminal. "sudo rfkill unblock all" This will unblock all hardware ports. that's it!!!!!! :) It works,..

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• Working environment

  - by Yottatron

  I realise that this might not be the right place to ask questions about employment and that the question my raise debate etc. The company I work for recently decided that rather than having one web developer working on sites from a branch it would be better to make that person come into head office and work in the middle of a busy call centre. Also they're expecting the developer to answer the phone if it rings and take messages. Does anyone find that strange? Is it really the right place for a programmer to work? Thanks for the advice

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• Global variable in a Linux shared library

  - by user3730495

  Suppose we have the following setup under Linux, .so library named "libcnt.so" and 3 user space apps: "app1", "app2", "app3". This library does 1 simple thing, it says to the app (app dynamically links the library at runtime) by how many apps it is already linked. Apps should have access to link counter. My knowledge in C and Linux is somewhat limited in this aspect, but as I understand this information should be stored in a global variable inside the shared object. Something like: in libcnt.h extern int cnt_loads; in libcnt.c int cnt_loads = 0; // where each linking increments this counter or something... So, my question is how it should be declared and/or defined inside .so library to guaranty that multiple apps from user space get the same instance of that variable counter?

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• HTML5 / Native / C# & Mono [closed]

  - by iainjames88

  My apologies for the subjective nature of this question but I'm unsure as to which path to follow. I would like to do a bit of indie game development for the iPhone (nothing serious, just something I've wanted to pursue). At my university we aren't taught Java or Objective-C but C#/.NET and HTML5/JavaScript. Is it worth taking what I already know and try to accomplish my goal using, for example, C# and Mono or should I invest the time and learn Objective-C? I don't have a problem learning something new alongside my course (I love learning new stuff) and time isn't a factor. I'm slightly in favor of learning Objective-C for as it would be another string to my bow in the workplace, but it would be nice to stay with C# because it is what I'm used to.

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• How does one get Bluetile on 12.04?

  - by JKN

  I've been working on getting bluetile working on 12.04 so I can start down the path of tiling windows managers, but I have been having limited success. I have read the (only 7!) other posts on bluetile and tried the website, but unfortunately nothing seems to address precise thoroughly enough for me to get it working. I have tried getting gnome running on my machine via apt-get and following basic instructions from there, but without success. The apt-get for bluetile also fails (on selecting the gnome-bluetile session option, unity ends up opening anyway in a buggy, unstable way). I also messed around with specifying a custom xsession for lightdm to look at and setting the window-manager to bluetile, but again without success- somehow I ended up in unity again. Apologies if this question is too vague- I am new to really using linux systems, so sometimes I don't know what to ask or look for. Thanks!

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• Can Tutorial "Dual Boot Windows 7 & Ubuntu 12.04" Used for Dual Booting Windows 8 & Ubuntu 12.10?

  - by Shyuan

  I previously used this tutorial to dual boot Windows 7 and Ubuntu 12.04 perfectly. Now I have upgraded my Windows 7 to Windows 8. And I would like to do a fresh install (and start all over again like the tutorial) of Ubuntu 12.10 replacing existing Ubuntu 12.04. I like the way the tutorial presents thus can anyone kindly let me know if the tutorial is compatible with what I wanna do now? I have tried doing little research whether this has been asked, but all I got are not too similar to my question, if there are topics like this I do apologise and feel free to close it. Hope to hear from the community. Thank you so much. :)

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• how to use version control

  - by ptamzz

  I'm developing a web site in php in localhost and as modules of it gets completed, I upload it on the cloud so that my friends can alpha test it. As I keep developing, I've lots of files and I lose track of which file I've edited or changed etc. I've heard of something as 'version control' to manage all those but am not sure how it works. So, my question is: Is there an easy way/service/application available to me to track all the edits/changes/new files and manage the files as I develop the website. As Soon as I'm done with a module, I want to upload it on the cloud (I'm using Amazon Cloud Service). If something happens to the new files, I might want to get back to the old file. And maybe, in a click or two, I get to see the files which I've edited or changed since the last one I've uploaded?

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• How do you stay in touch with a programming language?

  - by Abijeet Patro

  I'll be starting work for the first time in the IT Industry on the 18th of this month. I'll be working mostly with Microsoft technologies such as C#.NET and MS Dynamic CRM. I spent the last year working with C++. Developing small applications to automate taks and organize my notes. During this time I have developed a good basic understanding of the language. My question is how do you guys stay in touch with a programming language that you love when you need to use something else at the office?

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• Output the total number of String Characters [migrated]

  - by Programmerwannabe

  My Question is what method should I use if I wanted to get the total number of characters a user inputs? without using arrays, i tried using .length() but it did not return all characters say from the first and lastname, it only returned the first name. Here's an example of my code. (Please dont laugh im really new in programming :) ) System.out.print("Enter your first and last name: "); String yourName = keyboard.next(); System.out.println("Your name has a total of " + yourName.length() + " numbers"); what happened was if i enter say "Neo Matrix" it would only return 3. I appreciate any help. thank you!

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• Q: Is it me or is ADO.NET **BACKWARDS**? (20 replies)

  To simplify the question, I create 2 tables in SQL. Table 1 has columns: ColumnA (PK), ColumnB and Type. Table 2 has columns: A (PK) and Description Now, I want to set things up so that Table 1.Type is of type Table 2.A. 1) I guess in SQL lingo, what I'm trying to say is that Table 1.Type is a FK to Table 2.A. Is that correct terminology? Is that backwards? It appears to me to be correct. 2) So I ...

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• Where to upload my small apps or codes

  - by user108386

  My question is simple, but I couldn't found a good answer to it. Where to upload my code and my apps? I searching for a place where people find them. Homeworks, hobby projects, little helper scripts, and other open-source stuff. Does it depend on the used technology? I know, there are a lot of subversioning and project hosting systems. But where to start? I don't really know what I'd like. Maybe a wiki-post in the topic with paragraphs like: Upload you open source Winforms app to somesite or If you want to develop a Java library with your friends , use someothersite or Freeware stuff's best place is: ...

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• Falsey values vs null, undefned, or empty string

  - by user687554

  I've worked with jQuery over the years. However, recently, I've found myself getting deeper into the JavaScript language. Recently, I've heard about "truthy" and falsey values. However, I don't fully understand them. Currently, I have some code that looks like this: var fields = options.fields || ['id', 'query']; I need to identify if fields is null, undefined, or has a length of 0. I know the long way is to do: if ((fields === null) || (fields === undefined) || (fields.length === 0)) { ... } My question is, is the following the same: if (!fields) { ... } Thank you!

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• in sending with name using ? (counting), how does the process happen? [closed]

  - by sam

  Sometimes expressions has two states. the result of analyses might be two different things but at the end, there might be the same answer(result) for them.(the way we get to the answer is different,but the result is the same) for example: P-Q = M P-T = M in lambda we have two solutions. 1.sending with name. (in ALGOL it have over load) 2.sending with value Example: Q: (?y.(yy) (?x.(xx)a)) 1.sending with name (?x.(xx)a ?x.(xx)a) ((aa)(aa)) 2.sending with value (?y.(yy) aa) ((aa)(aa)) now here is the question, in sending with name that used ? (counting), how does the process happen? How this sending (transmittal) happen? How does it work?

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• Learning MySQL Query optimization

  - by recluze

  I've been doing web/desktop/server development for a while and have worked with many databases (mysql mostly). I've come to the point in my career when I need to have someone look at my queries because they're 'kind of slow'. I believe it's now time to start learning query optimization. While I know the basics of index and joins etc., I'm not familiar with how to use, say, the EXPLAIN output to improve performance of my queries. I have not been able to find any online material that starts with the basics and takes me to application. Getting a book is not an option right now so I'm looking for tips about how to proceed with this. I hope this question is general enough not to get closed.

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• How is this paradigm/style called?

  - by McMannus

  I have the following situation: I'm developing an add-in for a UML modeling tool. The models that can be created by the user are stored inside the main application and a limited access to the models is given through its API. However, the add-in has a lot of callbacks for events that are triggered by the main application, when changes to the model occur by the user. Since the models are already stored once in the main application, I considered it not practicable to duplicate the models in the add-in, which leads to the fact that I have only behavior in the add-in, rather than having a state. This behavior is mainly expressed by static functions, that are organized in functional cohesive classes. The callbacks for the events have always references to the model elements relevant for the specifc event that ocurred. First, it seemed to me that this is a procedural style in general, but procedural style doesn't consider events/callbacks, so this boils down to the question. How is this programming style called?

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• Q&A platform like StackExchange's sites? [closed]

  - by Sirko

  Possible Duplicate: Is there a free, open-source question and answer (Q&A) application similar to StackExchange? I need a Q&A platform like StackExchange's sites for lawyers and for free legal questions/answers. So, it must be simple, fast, convenient, with an attractive look. Regular forum's platforms don't suit these characteristics. I found, that bbPress (http://bbpress.org/forums/) isn't bad for this purpose. Is there anything else good for my task? I would be very thankful for helping!

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• Designing a hierarchical structure with lots of reads and writes?

  - by JD01

  I am in the process of working on a video on demand system part of it involves the management of a hierarchical tree structure (think windows explorer) which allows users to upload videos, move folders around, create new folders etc. User action will be allowed depending on which permissions they have. In addition to managing the structure (creating folders and uploading videos), subscribers will be viewing content (read access). The number of reads will be significantly more than the writes. My question (and it is big one) is should I store the data in a database (for the writes) and also have some sort of cache which will be used for the reads? or do I use two databases? or is there a better solution? Also I will have to resolve concurrency issues which I think optimistic locking on the database will resolve. I have a fair bit about CQRS over the last few months but not sure if this is the way to go. Any ideas?

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• Vector transform equation explanation

  - by cyberdemon

  I'm trying to understand the maths of moving points in a 3d space by making a game written in C#. I'm looking at this wolfire blog series which explains some basic 3d maths. I've read the first two parts but am stuck on the 3rd. I know it's all really rudimentary stuff but I find Googling for help with equations really hard. The one I'm struggling with is: 0*(0.66,0.75) + 2*(-0.75, 0.66) = (-1.5, 1.3) How can anything multiplied by 0 not be 0? So my question is how does this look in code: x(a,b) + y(c,d) I know it's basic stuff but I just can't see it.

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• What is w componet [duplicate]

  - by Tifa

  This question already has an answer here: What does the graphics card do with the fourth element of a vector as the final position? 3 answers What is the W component on graphics programming. I read a blog about opengl that says that w must be equal to either 0 or 1 here. But the book I am currently reading has put w component to more than 1 value. So im kinda confuse what does it really do. The book I am reading is OpenGL es a quick start guide.

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• MMORPG Server architecture: How to handle player input (messages/packets) while the server has to update many other things at the same time?

  - by Renann

  Yes, the question is is very difficult. This is more or less like what I'm thinking up to now: while(true) { if (hasMessage) { handleTheMessage(); } } But while I'm receiving the player's input, I also have objects that need to be updated or, of course, monsters walking (which need to have their locations updated on the game client everytime), among other things. What should I do? Make a thread to handle things that can't be stopped no matter what? Code an "else" in the infinity loop where I update the other things when I don't have player's input to handle? Or even: should I only update the things that at least one player can see? These are just suggestions... I'm really confused about it. If there's a book that covers these things, I'd like to know. It's not that important, but I'm using the Lidgren lib, C# and XNA to code both server and client. Thanks in advance.

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