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• I made a 2D ENGINE for Android, looking for cooperation.

  - by Roger Travis

  My name is Robert, I am an Android programmer and wanted to show off my latest project - a 2d game engine. You can see it in action here - https://play.google.com/store/apps/details?id=engineDemo.com My engine's main advantage is its ease of use. To have your level up and running, you'll need only 3 lines of code. ABoxView aboxView = new ABoxView(this); setContentView(aboxView); aboxView.loadLevel("level/level02"); Level are created in a special level constructor and object physical properties are stored in a corresponding XML file. I am looking to cooperate with those, who might be interesting in using my engine in their games. You can email me at [email protected] or post here. Thanks, Robert

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• Python PyBluez loses Bluetooth connection after a while

  - by Travis G.

  I am using Python to write a simple serial Bluetooth script that sends information about my computer stats periodically. The receiving device is a Sparkfun BlueSmirf Silver. The problem is that, after the script runs for a few minutes, it stops sending packets to the receiver and fails with the error: (11, 'Resource temporarily unavailable') Noticing that this inevitably happens, I added some code to automatically try to reopen the connection. However, then I get: Could not connect: (16, 'Device or resource busy') Am I doing something wrong with the connection? Do I need to occasionally reopen the socket? I'm not sure how to recover from this type of error. I understand that sometimes the port will be busy and a write operation is deferred to avoid blocking other processes, but I wouldn't expect the connection to fail so regularly. Any thoughts? Here is the script: import psutil import serial import string import time import bluetooth sampleTime = 1 numSamples = 5 lastTemp = 0 TEMP_CHAR = 't' USAGE_CHAR = 'u' SENSOR_NAME = 'TC0D' #gauges = serial.Serial() #gauges.port = '/dev/rfcomm0' #gauges.baudrate = 9600 #gauges.parity = 'N' #gauges.writeTimeout = 0 #gauges.open() filename = '/sys/bus/platform/devices/applesmc.768/temp2_input' def parseSensorsOutputLinux(output): return int(round(float(output) / 1000)) def connect(): while(True): try: gaugeSocket = bluetooth.BluetoothSocket(bluetooth.RFCOMM) gaugeSocket.connect(('00:06:66:42:22:96', 1)) break; except bluetooth.btcommon.BluetoothError as error: print "Could not connect: ", error, "; Retrying in 5s..." time.sleep(5) return gaugeSocket; gaugeSocket = connect() while(1): usage = psutil.cpu_percent(interval=sampleTime) sensorFile = open(filename) temp = parseSensorsOutputLinux(sensorFile.read()) try: #gauges.write(USAGE_CHAR) gaugeSocket.send(USAGE_CHAR) #gauges.write(chr(int(usage))) #write the first byte gaugeSocket.send(chr(int(usage))) #print("Wrote usage: " + str(int(usage))) #gauges.write(TEMP_CHAR) gaugeSocket.send(TEMP_CHAR) #gauges.write(chr(temp)) gaugeSocket.send(chr(temp)) #print("Wrote temp: " + str(temp)) except bluetooth.btcommon.BluetoothError as error: print "Caught BluetoothError: ", error time.sleep(5) gaugeSocket = connect() pass gaugeSocket.close() EDIT: I should add that this code connects fine after I power-cycle the receiver and start the script. However, it fails after the first exception until I restart the receiver. P.S. This is related to my recent question, Why is /dev/rfcomm0 giving PySerial problems?, but that was more about PySerial specifically with rfcomm0. Here I am asking about general rfcomm etiquette.

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• If some standards apply when "it depends" then should I stick with custom approaches?

  - by Travis J

  If I have an unconventional approach which works better than the industry standard, should I just stick with it even though in principal it violates those standards? What I am talking about is referential integrity for relational database management systems. The standard for enforcing referential integrity is to CASCADE delete. In practice, this is just not going to work all the time. In my current case, it does not. The alternative suggested is to either change the reference to NULL, DEFAULT, or just to take NO ACTION - usually in the form of a "soft delete". I am all about enforcing referential integrity. Love it. However, sometimes it just does not fully apply to use all the standards in practice. My approach has been to slightly abandon a small part of one of those practices which is the part about leaving "hanging references" around. Oops. The trade off is plentiful in this situation I believe. Instead of having deprecated data in the production database, a splattering of "soft delete" logic all across my controllers (and views sometimes depending on how far down the chain the soft delete occurred), and the prospect of queries taking longer and longer - instead of all that - I now have a recycle bin and centralized logic. The only tradeoff is that I must explicitly manage the possibility of "hanging references" which can be done through generics with one class. Any thoughts?

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• Downloads killing internet on my home network

  - by Travis

  I am currently having a problem with my wireless. Whenever I try to download anything it kills the internet for every other application(tabs within the same browser, browsers on other computers on the same network) except the process doing the download. This occurs with everything from downloading updates to iso's. I am not using a torrent. It happens when downloading upgrades, browser downloads, or anything else. This problem does not occur when I use Windows 7 on the same computer and it stops killing the internet for other computers if I turn the download/Ubuntu off. I am using an ASUS G74SX laptop running Ubuntu 12.10 with Gnome 3.6. My wireless card is an Intel Corporation Centrino Wireless-N + WiMAX 6150 (rev 67) Thanks!

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• Making a full-screen animation on Android? Should I use OPENGL?

  - by Roger Travis

  Say I need to make several full-screen animation that would consist of about 500+ frames each, similar to the TalkingTom app ( https://play.google.com/store/apps/details?id=com.outfit7.talkingtom2free ). Animation should be playing at a reasonable speed - supposedly not less, then 20fps - and pictures should be of a reasonable quality, not overly compressed. What method do you think should I use? So far I tried: storing each frame as a compressed JPEG before animation starts, loading each frame into a byteArray as the animation plays, decode corresponding byteArray into a bitmap and draw it on a surface view. Problem - speed is too low, usually about 5-10 FPS. I have thought of two other options. turning all animations into one movie file... but I guess there might be problems with starting, pausing and seeking to the exactly right frame... what do you think? another option I thought about was using OPENGL ( while I never worked with it before ), to play animation frame by frame. What do you think, would opengl be able to handle it? Thanks!

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• What must be done to allow a development team to minimize difficulties as new team members are added?

  - by Travis

  I work at a small Web Dev firm, and have been handling all the PHP/MySQL/etc. for a while. I'm looking at improving our practices to allow for easier collaboration as we grow. Some things I have in mind are: Implementing a versioning system (source control) Coding standards for the team (unless mandated by a certain framework, etc.) Enforcing a common directory structure for our Desktops (for backup purposes, etc.) Web-based task/project/time/file/password/contact management and collaboration app(we've tried a bunch; I may just create one) What do more experienced developers view as necessary first steps in this area? Do you recommend any books? One thing to consider is that the bulk of our daily tasks involve maintenance and adding minor functionality rather than new projects, and the team size will be between 3 and 5. I just found a related question about teams that will be expanding from a solo developer.

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• Programming Test

  - by Travis Webb

  We are looking to hire some more Java developers onto our team, and plan to test their coding abilities with a test. We currently use a web-based Java test that automatically compiles and runs the code, but it is very flaky and we're having problems with our candidates losing their work on this site. Not only is this frustrating for everyone, it makes us look like we don't know what we're doing. Is there a popular testing suite out there? What do you use? I'm not interested in dogmatic arguments on whether or not I should be testing my candidates in this way, I'm looking for a tool that will help me do it.

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• Selling Android apps from Latvia? or should I just put banners?

  - by Roger Travis

  I am in Latvia ( which is not supported to sell apps at android market ), so I am thinking about the best way of monetizing my app. So far I've come up with such options: somehow imitate that I am from a supported country, get a bank account there, etc. use PayPal for in-app purchases. The player get, say, first 10 levels for free, but then is asked to pay 0.99$ for the rest of the game. downsides: player might not feel comfortable entering his paypal details into an app. also android market might not really like that. making the app free and get money from advertising... let's do some calculation here, say, I get 1m free downloads, each user during his playtime would see 10 banners, therefor 10m / 1000 * 0.3 = gives roughly 33k$ ( if we use adMob with their 0.3$ per 1000 impressions ). On the other hand, if we use paypal in app purchase, we need a 3% or more conversion rate to beat this... hmm... What do you think about all this? Thanks! edit: from what I just read all over the net, it looks like advertisers will change their eCPM price a lot without you understanding why... while using in-app paypal purchase you can at least somehow monitor the cashflow.

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• Can i make money with my Android Engine or should I focus on game-making?

  - by Roger Travis

  I have dedicated past few month to developing my own android 2d engine. You can see its description, demo and tutorials here http://www.aboxengine.com/ ( jar files will be up in a day or two ). While working on the engine I believed it to be better then most available alternatives ( such as andengine, etc. ) and that people would love to use it in their games and, hopefully, would give me some royalties. Yet as I started posting about my engine on other forums, it start looking like people are only interested in free/opensource engines. Based on your experience, what do you think, is there some way for me to make money with that engine or should I forget about selling it and more focus on making games with it myself? Thanks!

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• SEO one longer page vs. several targeted subpages?

  - by Travis

  We're working on a site and have come to a choice between one long (not too excessive) main page and several subpages. The subpages would have custom metas/titles/h2 tags and the content that corresponds to them. The main page would have all the content and many more inbound links (pagerank) and with longer content encompassing the content we'd put on the shorter pages. Which would be better for seo and traffic in general? Both schemes are very usable to the user although we are a little concerned with duplicate content (the page's header/footer and other elements remain the same)

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• How should I make searching a relational database more efficient?

  - by Travis J

  This is in the scope of a web application. I have a database which has a few nested relations. There is a feature which depicts the history of a large chain of relations. It is essentially a data analysis feature. The issue is that in order to search, a large object graph must be loaded - the loading time for this object graph is not quick enough to be viable. The problem is that without loading the whole graph it makes searching from a single string nearly impossible. In order to search, explicit fields must be specified and the search data supplied. Is there a design pattern for exposing the data in a way which facilitates a single string search instead of having to explicitly define parameters?

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• How do I get a Qualcomm Atheros Killer E2200 gigabit ethernet card working on a MSI Z87-GD65?

  - by Travis Allen

  So I literally just built my first computer from scratch and I can't get the network card to work as I've gathered it requires getting some drivers somehow.. Motherboard : MSI Z87-GD65 CPU : Intel Haswell i7 Ubuntu Ver : 12.04 Using the on-board network port Please help I'm about to start crying into my keyboard over this (not really). Any info would be greatly appreciated, also please be very specific as to what I have to do as I have not used Ubuntu very much so talk to me like a child, I won't take offence. Also I've already tried following the instructions here : How do I get a Qualcomm Atheros Killer E2200 gigabit ethernet card working? I don't know if I'm just retarded or am missing something

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• transferring files from PC to Ubuntu PC on same network

  - by Travis

  i recently installed a fresh version of ubuntu 12.04 i wanted to transfer my old files from my pc that is running windows, to my other pc which now has ubuntu installed on it. They are both on the same network, i feel like this should be something easy to do, but i cant figure it out at all. Any help would be appreciated thank you. I downloaded and installed samba on my linux computer, and set up a share, but i can not find the directory on my windows machine. where do i find it?

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• What kind of graphics would you like better? [ pictures ] [closed]

  - by Roger Travis

  I am looking forward to make an android game, something angrybirds style. I've already made my own engine and now have to decide what kind of graphics should I make. It could be either realistic, like that or a doodle-style like this Right now the first one looks more appealing to me... on the other hand, doodle-graphics are very easy to draw and their transparency doesn't seem to slow down the engine much. What do you think?

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• No Sound from Shared Media

  - by Travis

  I have a shared media folder that I have all of my mp3's in. When I try to play them using Ubuntu, I get no sound, but the media player (Rhythmbox, Exaile, etc) display that they are playing the file, it looks like everything is playing but no sound. I have checked and rechecked the volume levels of the system and each application and I see no issues. If I move a file to the local drive, it plays just fine. I do sound checks while the file is playing and I get audio (front left, front right) from the test but not from the media file that I am playing. Any help would be greatly appreciated.

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• Best practice for comments above methods in a grails application?

  - by Travis

  I'm writing a grails application and am not sure what the best practice is with regard to comments outside of method blocks. I've done a bit of research and there seems to be conflicting views on how and when these sort of comments should be used. In lots of source code I have seen there seems to be comments above every method detailing what that method does. I'm not sure if grails should be differnet? My question is should I have a comment above each method in my controllers, services and domain objects? i.e /* * This method displays the index page */ def index(){ render view : "index" }

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• Fresh Ubuntu 12.10 install no desktop or wing bar

  - by Travis

  After a fresh installm of ubuntu 12.10 (complete erase) after logging in it appears i have no taskbar or much of anything, although i can still execute my terminal with CTRL+ALT+T. i looked around a little, seems i'm not the only person who has had this problem. I found here: http://ubuntuforums.org/showthread.php?p=12303179#post12303179 From there, i found myself here: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-updates/+bug/1068341 I followed precisely the instructions provided which were: this problem is solved this way Switch to a terminal (Ctrl-Alt-F1). Login as your username. Install linux source (sudo apt-get install linux-source) and headers (sudo apt-get install linux-headers-3.5.0-17-generic). Uninstall nvidia driver - this depends on which version you installed (sudo apt-get remove nvidia-current or sudo apt-get remove nvidia-current-updates or sudo apt-get remove nvidia-experimental-304). Reinstall nvidia driver (sudo apt-get install nvidia-current-updates). If it successfully installs, restart the computer (sudo shutdown -r now). Source Desktop does not show when I installed nvidia drivers! I have rebooted, and i am still having the exact same problem. so i back at square one. can someone help me please? this is my room mates computer and i told him i was "fixing" it and now i feel like i've ruined it. Any help is greatly appreciated. Thank you for your time.

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• LAMP: How do I set up http://myservername.com/~user access?

  - by Travesty3

  Been trying to Google this, but I can't figure out good search terms to find any info about what I need, since I don't really know what it's called. I'm pretty much being thrown to the wolves to figure out how to set up a LAMP server. We had someone who knew how to do it, he set one up and then quit. It was set up so that when I went to "http://{myservername}.com/~travis" it showed the contents of my /home/travis/public_html folder. This worked fine, then we lost power and the server restarted (I know, battery backup, but this is a dev server in a dev building so it's OK). Now, the browser can't find that URL. I also need to know how to set this up on a new server, so instead of wasting time diagnosing this problem (probably just something dumb I did messing with settings or something), I really need to know how to set this up from scratch. Thanks for taking the time to read this and (hopefully) answer!

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• Des chercheurs allemands développent AdLeaks, un programme pour soustraire les « Whistleblowers » comme Edward Snowden de l'oeil espion de la NSA

  ADLeaks un programme destiné à préserver l'anonymat des "Whistleblowers" comme Edward Snowden sort Objectif soustraire les "Whistleblowers" de l'oeil espion de la NSA"Nous devons admirer l'acte de bravoure d'Edward Snowden qui a sacrifié son avenir pour ses convictions, lorsqu'il a révélé au grand jour le projet PRISM (Lire le dossier de la rédaction sur PRISM)", selon le Professeur Volker Roth de l'université de Freie en Allemagne.Ce fait nous rappelle que beaucoup risquent leur vie lorsqu'il s'agit de révéler au grand jour les actes de corruptions ou autres actions malveillantes impliquant un organis...

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• iOS localization inconsistency

  - by Joe Völker

  I'm localizing an iPhone app for the first time. I've put all my strings into a Localizable.strings file, accessing them via NSLocalizedString from within my code. Works fine. Next, I have a file called info.html that contains the flesh of a UIWebView that I use as an About box. I've put it in the language folders (en.lproj and de.lproj), and added them to my Resources in Xcode. Now, in Simulator, both the Strings, and the html file display in the appropriate language. However, on the device, the Strings appear localized while the html file remains untranslated. This is a strange inconsistency between Simulator and Device! Anybody know of a workaround? (...other than defying the localization system, and using NSLocalizedString to call de_info.html, en_info.html etc. by hand.)

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• Calculating Average Percentage Yield (APY) with T-SQL

  - by M. Travis Volker

  How do you calculate Average Percentage Yield (APY) with T-SQL? Is there a system function to calculate APY or do I have to create one? Note: APY = (1 + r/n )^n – 1 where r is the stated annual interest rate and n is the number of times you’ll compound per year.

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• Problem porting boost 1.33.1 programm to boost 1.42.0

  - by Volker Beyer

  i've got a variable: boost::program_options::options_description m_corbaDesc; and the following is done with it m_corbaDesc.add_options() ("corba", boost::programm_options::parameter("<options+>", &m_corbaOptions), "CORBA -ORBInitRef options") ("corba-ns", boost::program_options::parameter("<name:port>", &m_corbaNameService), "simple-type CORBA NameService").default_value("localhost:12345") ; this works in boost boost 1.33.1 but not in 1.42.0. What would it be in 1.42.0?

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• Dashboard Devmode w/o "Always on Top" Possible?

  - by Travis

  I am using (and loving) OS X's Dashboard in dev mode ('defaults write com.apple.dashboard devmode YES') which lets you put the widgets on your desktop directly. The only downside is the widgets are "always on top". So all windows end up going under the widgets instead of above. Is there any way to disable this?

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• OpenAM throwing 302 0 behind haproxy, nginx

  - by Travis

  I'm having some issues with my deployment and was wondering if you can help. My set up is as follows: 2 OpenAM servers are set up behind a load balancer (HAproxy). The load balancer is set up behind two reverse proxies (nginx). The two reverse proxies are ser up behind another load balancer (haproxy). So a request will go through Haproxy nginx Haproxy openam I can access the OpenAM web console through the reverse proxies without a problem. Everything works fine at this level. However when I access openam through the load balancer in front of the reverse proxies Openam throws a 302 error. The funny thing is however I can access the host/openam/UI/Login and login successfully. I even get the cookie and have access to my apps that are set up. However immediately after the login OpenAM throws a 302 redirect. I'm puzzled and cannot figure out what is going wrong. Does anyone have any idea? My config files are below: nginx config : server { listen 443; server_name oamlb1; location / { proxy_pass http://oamlb1.mydomain.com:8080; proxy_set_header X-Real-IP $remote_addr; } location /openam { proxy_pass http://oamlb1.mydomain.com:8080; proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host oamlb1.mydomain.com:8080; } } haproxy config : (This file is for the servers. The file for the reverse proxies is idenical except it points to the reverse proxies) listen http_proxy :8090 mode http balance roundrobin option httpclose option forwardfor server webA oamserver1.mydomain.com:18080 option forwardfor Thanks

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• Fedora Core yum update cpio error

  - by Travis

  Any idea why I'm getting these errors when running: yum update http://pastie.org/private/7x4pez9duzxvmb6lgeyrgq I've never had a problem with that command in the past.

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