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• ByteBuffer recycling class

  - by Chris Dennett

  Hi everyone, I'm wonder how I'd code up a ByteBuffer recycling class that can get me a ByteBuffer which is at least as big as the specified length, and which can lock up ByteBuffer objects in use to prevent their use while they are being used by my code. This would prevent re-construction of DirectByteBuffers and such over and over, instead using existing ones. Is there an existing Java library which can do this very effectively? I know Javolution can work with object recycling, but does that extend to the ByteBuffer class in this context with the requirements set out? Cheers, Chris

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• C++ stringstream, string, and char* conversion confusion

  - by Graphics Noob

  My question can be boiled down to, where does the string returned from stringstream.str().c_str() live in memory, and why can't it be assigned to a const char*? This code example will explain it better than I can #include <string> #include <sstream> #include <iostream> using namespace std; int main() { stringstream ss("this is a string\n"); string str(ss.str()); const char* cstr1 = str.c_str(); const char* cstr2 = ss.str().c_str(); cout << cstr1 // Prints correctly << cstr2; // ERROR, prints out garbage system("PAUSE"); return 0; } The assumption that stringstream.str().c_str() could be assigned to a const char* led to a bug that took me a while to track down. For bonus points, can anyone explain why replacing the cout statement with cout << cstr // Prints correctly << ss.str().c_str() // Prints correctly << cstr2; // Prints correctly (???) prints the strings correctly? I'm compiling in Visual Studio 2008.

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• Where do you store the private key for your code signing certificate?

  - by flipdoubt

  I recently acquired a code signing certificate for my employer, but I am not the InstallShield developer who will sign the binaries before distribution. I know I can export the certificate along with its private key, but where do I store it so the InstallShield developer can install it on his machine? Should I remove it from my machine once I give it to the person doing the signing? Where do I store the master copy? Obviously, source control is not the best place, unless I lock down that directory in SVN.

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• Basic site analytics doesn't tally with Google data

  - by Jenkz

  After being stumped by an earlier quesiton: SO google-analytics-domain-data-without-filtering I've been experimenting with a very basic analytics system of my own. MySQL table: hit_id, subsite_id, timestamp, ip, url The subsite_id let's me drill down to a folder (as explained in the previous question). I can now get the following metrics: Page Views - Grouped by subsite_id and date Unique Page Views - Grouped by subsite_id, date, url, IP (not nesecarily how Google does it!) The usual "most visited page", "likely time to visit" etc etc. I've now compared my data to that in Google Analytics and found that Google has lower values each metric. Ie, my own setup is counting more hits than Google. So I've started discounting IP's from various web crawlers, Google, Yahoo & Dotbot so far. Short Questions: Is it worth me collating a list of all major crawlers to discount, is any list likely to change regularly? Are there any other obvious filters that Google will be applying to GA data? What other data would you collect that might be of use further down the line? What variables does Google use to work out entrance search keywords to a site? The data is only going to used internally for our own "subsite ranking system", but I would like to show my users some basic data (page views, most popular pages etc) for their reference.

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• Explain Python extensions multithreading

  - by Checkers

  Python interpreter has a Global Interpreter Lock, and it is my understanding that extensions must acquire it in a multi-threaded environment. But Boost.Python HOWTO page says the extension function must release the GIL and reacquire it on exit. I want to resist temptation to guess here, so I would like to know what should be GIL locking patterns in the following scenarios: Extension is called from python (presumably running in a python thread). And extension's background thread calls back into Py_* functions. And a final question is, why the linked document says the GIL should be released and re-acquired?

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• Why AQTime slows execution even when profiling is not on, and can anything be done for it?

  - by Antti Suni

  Hi! In AQTime for Delphi, it boasts to be very fast to get to the trouble spots by using areas and triggers etc. But it seems to me, that especially if you have very much code in the areas to profile, then the execution slows down dramatically even when the profiling is NOT on. For example, if I want to profile a specific routine late in the program flow, but don't know what is called there, I'd think to put this routine only as a trigger and the initial status for threads as Off, and then choose "Full check by Routines/Lines". However, when I do this, the program execution slows down heavily already before the trigger routine has ever been hit. For example if the "preparation flow" takes around 5 minutes without AQTime, then when I run it with profiling disabled, it already has been running for 30 minutes and still goes even when I know the trigger has not yet even been reached. I know I can try to workaround this by reducing the amount of routines/lines profiled, but it is not really a good solution for me, since I'd like to profile all of them once I get to the actual trigger routine. Also another, often better workaround is to start the application without AQTime and then use Attach to Process after the "preparation flow" has finished, but this works well only when the execution pauses in GUI in the proper place or otherwise provides a suitable time frame for doing the attaching. In all cases this is not the case. Any comments on why this is so and is there anything else to do than just try to reduce the code from the areas or attach later to the process?

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• Eclipse - How can I change a 'Project Facet' from Tomcat 6 to Tomcat 5.5?

  - by pcimring

  (Eclipse 3.4, Ganymede) I have an existing Dynamic Web Application project in Eclipse. When I created the project, I specified 'Default configuration for Apache Tomcat v6' under the 'Configuration' drop down. It's a month or 2 down the line, and I would now like to change the configuration to Tomcat 'v5.5'. (This will be the version of Tomcat on the production server.) I have tried the following steps (without success): I selected Targeted Runtimes under the Project Properties The Tomcat v5.5 option was disabled and The UI displayed this message: If the runtime you want to select is not displayed or is disabled you may need to uninstall one or more of the currently installed project facets. I then clicked on the Uninstall Facets... link. Under the Runtimes tab, only Tomcat 6 displayed. For Dynamic Web Module, I selected version 2.4 in place of 2.5. Under the Runtimes tab, Tomcat 5.5 now displayed. However, the UI now displayed this message: Cannot change version of project facet Dynamic Web Module to 2.4. The Finish button was disabled - so I reached a dead-end. I CAN successfully create a NEW Project with a Tomcat v5.5 configuration. For some reason, though, it will not let me downgrade' an existing Project. As a work-around, I created a new Project and copied the source files from the old Project. Nonetheless, the work-around was fairly painful and somewhat clumsy. Can anyone explain how I can 'downgrade' the Project configuration from 'Tomcat 6' to 'Tomcat 5'? Or perhaps shed some light on why this happened? Thanks Pete

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• Rails: simple bundler question with ruby-openid

  - by Joern Akkermann

  Hi! I just installed the ruby-openid gem and then bundled it by entering gem 'ruby-openid', :require => 'openid' in the gemfile. Then I started bundle install and bundle lock. Everything worked fine so far. But how can I now access the classes of ruby-openid. OpenID::method won't work for me. It raises a not found error. What have I forgot or done wrong? I'm absolutely new to bundler and the internet full of solutions for various versions, but I need one solution that's surely working. I'm thankful for any help!

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• How can I disable the CTRL-ALT-DEL key combination completely on XP/Vista/7?

  - by Travesty3

  I have been googling extensively to figure this out, and nobody seems to be able to give a direct answer. Let me start by saying that I'm NOT talking about requiring CTRL-ALT-DEL to enter logon information. I'm working on a golf simulator program which is used at golf centers. I need the ability to completely disable the CTRL-ALT-DEL key sequence so that the golf center customers can't get out of the program and access the computer at all. I realize there are other key combinations that need to be handled as well, we already have this entire feature working in XP, but we're going to be switching to Windows 7 soon, and CTRL-ALT-DEL is the only one that doesn't seem to work in Win7. I'd really like an all-around solution if at all possible. This same program may also be installed on a client's personal computer for an in-home golf simulator, but the computers that really need this feature (golf center computers) are provided to the golf center by us, so would the best option be to write a new shell? I don't know anything about that at all, other than others that suggest writing a new shell for kiosk mode. I'd really like a simpler option, like modifying the registry in some way. I have heard that you can remove some buttons from the menu screen that pops up, but unless I can remove pretty much all of them (including the shutdown/restart button in the bottom-right corner), this won't be enough of a solution for me. Thanks for taking the time to read this and thanks again for any help you could provide! -Travis

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• Oracle performance problems with large batch of XSL operations

  - by FrustratedWithFormsDesigner

  I have a system that is performing many XSL transformations on XMLType objects. The problem is that the system gradually slows down over time, and sometimes crashes when it runs out of memory. It seems that the slow down (and possibly memory crash) is around the dbms_xslprocessor.processXSL function call, which gradually takes longer and longer to complete. The code looks like this: v_doc dbms_xmldom.DOMDocument; v_transformer dbms_xmldom.DOMDocument; v_XSLprocessor dbms_xslprocessor.Processor; v_stylesheet dbms_xslprocessor.Stylesheet; v_clob clob; ... transformer := PKG_STUFF.getXSL(); v_transformer := dbms_xmldom.newDOMDocument(transformer); v_XSLprocessor := Dbms_Xslprocessor.newProcessor; v_stylesheet := dbms_xslprocessor.newStylesheet(v_transformer, ''); ... for source_data in (select id in source_tbl) loop begin v_doc := PKG_CONVERT.convert(in_id => source_data.id); --start time of operation v_begin_op_time := dbms_utility.get_time; --reset the CLOB v_clob := ' '; --Apply XSL Transform dbms_xslprocessor.processXSL(p => v_XSLprocessor, ss => v_stylesheet, xmldoc => v_Doc, cl => v_clob); v_doc := dbms_xmldom.newDOMDocument(XMLType(v_clob)); --end time v_end_op_time := dbms_utility.get_time; --calculate duration v_time_taken := (((v_end_op_time - v_begin_op_time))); --log the duration PKG_LOG.log_message('Time taken to transform XML: '||v_time_taken); ... ... DBMS_XMLDOM.freeDocument(v_Doc); DBMS_LOB.freetemporary(lob_loc => v_clob); end loop; The time taken to transform the XML is slowly creeping up (I suppose it might also be the call to dbms_xmldom.newDOMDocument, but I had thought that to be fairly straightforward). I have no idea why.... :( (Oracle 10g)

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• GAE AttributeError

  - by awegawef

  My GAE app runs fine from my computer, but when I upload it, I start getting an AttributeError, specifically: AttributeError: 'dict' object has no attribute 'item' I am using the pylast interface (an API for last.fm--link). Specifically, I am accessing a list of variables of this type: SimilarItem = _namedtuple("SimilarItem", ["item", "match"]) I have a variable of this type, call it sim, and I am trying to access sim.item when I get the attribute error. I should note that I am using Python 2.6 on my computer, and I understand that GAE runs on Python 2.5. Would that make a difference here? I thought they were backwards-compatible. Lastly, I think it could be a possible problem with the modules that pylast imports--maybe they don't work with GAE or something? I did some research but I didn't get any results. Here are the imports: import hashlib import httplib import urllib import threading from xml.dom import minidom import xml.dom import time import shelve import tempfile import sys import htmlentitydefs I would appreciate any help with this frustrating issue. Thanks in advance.

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• JQuery UI Autocomplete showing as bullets

  - by awshepard

  The JQuery UI Demo page for autocomplete (link) has a nice looking search box and drop down with nice colors and highlights and such. When I implement it for myself, I end up with a bulleted list. How do I get my drop down of suggestions to look like theirs? A few notes/code fragments: I'm working in .NET land, so I'm using the <asp:ScriptManager> tag with <asp:ScriptReference>s inside it to get the hosted jquery.min.js (1.4.2) and jquery-ui.min.js (1.8.1) files from Google. My input box is fairly simple: <div class='ui-widget'> <label for="terms">Term: </label> <input id="terms" class="ui-autocomplete-input"> </div> My autocomplete looks like: $(""#terms"").autocomplete({source:""GetAttributesJSON.aspx"",minLength:2}); I get the correct data back, so that's not the issue. I just want fancy graphics. Any thoughts would be much appreciated.

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• C# XP Sound QuickFix

  - by ikurtz

  I have this: ThreadPool.QueueUserWorkItem(new WaitCallback(FireAttackProc), fireResult); and FireAttackProc: private void FireAttackProc(Object stateInfo) { // Process Attack/Fire (local) lock (_procLock) { // build status message String status = "(Away vs. Home)"; // get Fire Result state info FireResult fireResult = (FireResult)stateInfo; // update home grid with attack information GameModel.HomeCellStatusSet(fireResult.FireGridLocation, Cell.cellState.Lock); this.Invoke(new Action(delegate() { RefreshHomeGrid(); })); status = status + "(Attack Coordinate: (" + GameModel.alphaCoords(fireResult.FireGridLocation.Column) + "," + fireResult.FireGridLocation.Row + "))(Result: "; // play audio data if true if (audio) { String Letters; Stream stream; SoundPlayer player; Letters = GameModel.alphaCoords(fireResult.FireGridLocation.Column); stream = Properties.Resources.ResourceManager.GetStream("_" + Letters); player = new System.Media.SoundPlayer(stream); player.PlaySync(); Letters = fireResult.FireGridLocation.Row.ToString(); stream = Properties.Resources.ResourceManager.GetStream("__" + Letters); player = new System.Media.SoundPlayer(stream); player.PlaySync(); stream.Dispose(); player.Dispose(); } if (audio) { SoundPlayer fire = new SoundPlayer(Properties.Resources.fire); fire.PlaySync(); fire.Dispose(); } // deal with hit/miss switch (fireResult.Hit) { case true: this.Invoke(new Action(delegate() { GameModel.HomeCellStatusSet(fireResult.FireGridLocation, Cell.cellState.Hit); status = status + "(Hit)"; })); if (audio) { SoundPlayer hit = new SoundPlayer(Properties.Resources.firehit); hit.PlaySync(); hit.Dispose(); } break; case false: this.Invoke(new Action(delegate() { GameModel.HomeCellStatusSet(fireResult.FireGridLocation, Cell.cellState.Miss); status = status + "(Miss)"; })); GameModel.PlayerNextTurn = NietzscheBattleshipsGameModel.GamePlayers.Home; if (audio) { SoundPlayer miss = new SoundPlayer(Properties.Resources.firemiss); miss.PlaySync(); miss.Dispose(); } break; } // refresh home grid with updated data this.Invoke(new Action(delegate() { RefreshHomeGrid(); })); GameToolStripStatusLabel.Text = status + ")"; // deal with ship destroyed if (fireResult.ShipDestroyed) { status = status + "(Destroyed: " + GameModel.getShipDescription(fireResult.DestroyedShipType) + ")"; if (audio) { Stream stream; SoundPlayer player; stream = Properties.Resources.ResourceManager.GetStream("_home"); player = new System.Media.SoundPlayer(stream); player.PlaySync(); player.Dispose(); stream.Dispose(); string ShipID = fireResult.DestroyedShipType.ToString(); stream = Properties.Resources.ResourceManager.GetStream("_" + ShipID); player = new System.Media.SoundPlayer(stream); player.PlaySync(); player.Dispose(); stream.Dispose(); stream = Properties.Resources.ResourceManager.GetStream("_destroyed"); player = new System.Media.SoundPlayer(stream); player.PlaySync(); player.Dispose(); stream.Dispose(); } } // deal with win condition if (fireResult.Win) { if (audio) { Stream stream; SoundPlayer player; stream = Properties.Resources.ResourceManager.GetStream("_home"); player = new System.Media.SoundPlayer(stream); player.PlaySync(); player.Dispose(); stream = Properties.Resources.ResourceManager.GetStream("_loses"); player = new System.Media.SoundPlayer(stream); player.PlaySync(); player.Dispose(); } GameModel.gameContracts = new GameContracts(); } // update status message if (fireResult.Hit) { if (!fireResult.Win) { status = status + "(Turn: Away)"; LockGUIControls(); } } // deal with turn logic if (GameModel.PlayerNextTurn == NietzscheBattleshipsGameModel.GamePlayers.Home) { this.Invoke(new Action(delegate() { if (!fireResult.Win) { status = status + "(Turn: Home)"; AwayTableLayoutPanel.Enabled = true; } })); } // deal with win condition if (fireResult.Win) { this.Invoke(new Action(delegate() { status = status + "(Game: Home Loses)"; CancelToolStripMenuItem.Enabled = false; NewToolStripMenuItem.Enabled = true; LockGUIControls(); })); } // display completed status message GameToolStripStatusLabel.Text = status + ")"; } } The issue is this: Under Vista/win7 the sound clips in the FireAttackProc plays. But under XP the logic contained within FireAttackProc gets executed but none of the sound clips play. Is there a quick solution to this so the sound will play under XP? I ask for a quick solution because i am happy being able to execute fully in Vista/Win7 but would be great if there was a quick solution so it would be XP compitable also. Thank you.

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• IRC Server configuration possibilities

  - by Katai

  I need to know a couple of things, concerning IRC servers that I couldnt directly find out over google (or werent clear enough for me to be sure if it actually works) I'm working at a larger community site, and wanted to deliver an in-page chat. Since it would be a nice feature to let people access it from outside too, over their own clients, I tought implementing an IRC Server would be the best solution (probably dedicated, I'll have to teach myself a couple of things for that) I plan to include a Web-based IRC client over an APE Client / Server. The problem is, I want to strip down the user rights, to disallow many functionalities that IRC would offer: Change of nicknames: The user logs in over the Page login, and I'll automatically create an IRC auth for this user with that password. So basically, he would connect to the IRC client over a button. And after connecting, he shouldnt be able to change his nickname at all Creating channels: I want the possibility to create channels, but not from 'normal' users. Basically, I would prefer to set up basic channels that are public, and if a user really creates an own channel, that one should be private and via invitation (is that possible?) Private conversations: private conversations should be filtered out from the allaround IRC client, into separate 'in-browser-windows' that I create over JS. I guess I just have to filter the stuff coming from IRC - or is there a better solution to that? Only 'registered' users have access: Like I said, if someone registers on the page, I would like to create an IRC 'account' for him. Users that arent registered on the page, cant access the IRC server at all (or get thrown out). Mainly to avoid spammers or bots from outside. Is this stuff solvable over IRC? I've read some FAQ's and Instructions for IRC OP's and servers, but I couldnt find a clear answer - it seems that everyone can do pretty much everything - I would like to configure it in a way that user possibilities are more cut down. Basically, giving users the possibility to chat, but not more. So the Question basically is, how possible / solvable this issues are allaround, or if I have to find other solutions for this.

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• ComboBox exception caused in winforms FormClosing event

  - by Spooky2010

  Using c# vs2008 winforms I have an application with a bunch of child winforms. Each time a form is closed I need to store the current selected value of a combobox that is on each form to a Global application variable so that I can track it and use it in new forms. The combobox is populated on form start via a method to set its datasource to an ArrayList of items What I have found is if the combobox is populated with items in the designer, and you try to get the combobox value in the form closing event, I always get a NullReferenceException. However if the comboBox has an datasource like I DO have in my application and I try to get the combobox value in the form closing event then I would say 95% of the time I DO NOT get the NullReferenceException, but I do get it 5% of the time. That ratio can even vary depending on what computer I run the application on. for example I have 1 computer where the exception always occurs. My question is therefore what is (the best) way to get the value of the combobox, last thing before the form closes without causing the exception. I would def prefer to do it last thing before the form closes rather than track it with every selected index change event. Any advice appreciated.

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• Why do Programmers Love/Hate Objective-C?

  - by Genericrich

  So I have noticed that there is a lot of animosity towards Objective-C among programmers. What's your take? Is it a vendor lock-in thing against Apple? General antipathy towards Apple? The syntax? What's your view on this? With the advent of the iPhone SDK, Obj-C has gotten a lot more attention lately, and I am curious what people on SO's opinions are. I personally fought the syntax at first but have gotten more and more used to it now. I really like the named arguments. I have some pet peeves with how things are done in Obj-C vs other languages, but I will refrain from comment on them here.

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• Add icon on spark button skin

  - by Jerry

  Hello all I am trying to add different icon on different buttons. I have my skin file ready but not sure if I have to create different skin class for different button. It sounds inefficient. Any suggestions? Thanks for the reply... <s:Button id="pass" width="110" height="35" fontWeight="bold" fontSize="12" fontFamily="arial" label="Past Track" data="@Embed('assets/IconAirplain.png')" click="pass_clickHandler(event)" skinClass="skins.CustomSkin"/> <s:Button id="future" width="110" height="20" fontWeight="bold" fontSize="12" fontFamily="arial" label="Future Plan" click="future_clickHandler(event)" skinClass="skins.CustomSkin"/> Skin..... <!-- layer 2: fill --> <!--- @private --> <s:Rect id="fill" left="1" right="1" top="1" bottom="1" radiusX="2"> <s:fill> <s:LinearGradient rotation="90"> <s:GradientEntry color="#304fd7" color.over="#4b6bf6" color.down="0xAAAAAA" alpha="0.85" /> <s:GradientEntry color="#1f38a3" color.over="#3653cf" color.down="0x929496" alpha="0.85" /> </s:LinearGradient> </s:fill> </s:Rect> <!-- icon --> // I could add my icon here but that would make me to create //different icon image for different button

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• ruby on rails language problem "invalid byte sequence in GBK"

  - by user357203

  This is definitely a language issue, both of our code and our database contains Chinese characters. **This is my environment: About your application's environment Ruby version 1.9.1 (i386-mingw32) RubyGems version 1.3.5 Rack version 1.0 Rails version 2.3.5 Active Record version 2.3.5 Active Resource version 2.3.5 Action Mailer version 2.3.5 Active Support version 2.3.5 Application root C:/path_to_my_root Environment development Database adapter mysql Database schema version 20100327010640 **This is my localhost;3000 after running my ruby server: ArgumentError in HomeController#construction invalid byte sequence in GBK RAILS_ROOT: C:/path_to_my_root Application Trace | Framework Trace | Full Trace C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template_error.rb:43:in `split' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template_error.rb:43:in `source_extract' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template_error.rb:86:in `compute_backtrace' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template_error.rb:11:in `initialize' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template.rb:212:in `new' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template.rb:212:in `rescue in render_template' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template.rb:205:in `render_template' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ base.rb:265:in `render' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ base.rb:352:in `_render_with_layout' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ base.rb:262:in `render' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/base.rb:1250:in `render_for_file' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/base.rb:951:in `render' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/benchmarking.rb:51:in `block in render_with_benchmark' C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/ active_support/core_ext/benchmark.rb:17:in `block in ms' C:/Ruby19/lib/ruby/1.9.1/benchmark.rb:309:in `realtime' C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/ active_support/core_ext/benchmark.rb:17:in `ms' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/benchmarking.rb:51:in `render_with_benchmark' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:135:in `block in custom' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:179:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:179:in `block in respond' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:173:in `each' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:173:in `respond' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:107:in `respond_to' C:/Users/Howard/Documents/local/vjoin/app/controllers/ home_controller.rb:53:in `construction' ..... C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/ methodoverride.rb:24:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/params_parser.rb:15:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/session/cookie_store.rb:93:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/failsafe.rb:26:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/lock.rb:11:in `block in call' :8:in `synchronize' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/dispatcher.rb:114:in `block in call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/reloader.rb:34:in `run' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/dispatcher.rb:108:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/rails/rack/ static.rb:31:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in `block in call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `each' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/rails/rack/ log_tailer.rb:17:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/ content_length.rb:13:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/handler/ webrick.rb:50:in `service' C:/Ruby19/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service' C:/Ruby19/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run' C:/Ruby19/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread' Request Parameters: None Show session dump Response Headers: {"Cache-Control"=>"no-cache", "Content-Type"=>"text/html"} **What should I do? I tried to search online, didn't find much. The only thing I found was something like putting the following into application_controller: before_filter :set_charset, :set_locale def set_charset response.headers["Content-Type"] = "text/html; charset=utf-8" WIN32OLE.codepage = WIN32OLE::CP_UTF8 end but this still doesn't work. I am new to ruby on rails, so don't know much about it. Thanks for your help.

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• PhysX for massive performance via GPU ?

  - by devdude

  I recently compared some of the physics engine out there for simulation and game development. Some are free, some are opensource, some are commercial (1 is even very commercial $$$$). Havok, Ode, Newton (aka oxNewton), Bullet, PhysX and "raw" build-in physics in some 3D engines. At some stage I came to conclusion or question: Why should I use anything but NVidia PhysX if I can make use of its amazing performance (if I need it) due to GPU processing ? With future NVidia cards I can expect further improvement independent of the regular CPU generation steps. The SDK is free and it is available for Linux as well. Of course it is a bit of vendor lock-in and it is not opensource. Whats your view or experience ? If you would start right now with development, would you agree with the above ? cheers

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• Is there a detailed description of optimizations in the Android build process?

  - by Daniel Lew

  I've been curious as to all the optimizations that go into the building of an .apk. I'm curious because of two things I've tried in the past to bring down the size of my .apk: I have had a few large json assets in projects before, as well as a static sqlite database. I tried bringing down the size of the apk by gzipping them before the build process, but the resulting size is exactly the same. I just today tried pngcrush on my /drawable/ folders. The resulting build was exactly the same size as before. I would think that perhaps #1 could be explained by the zip process, but simply zipping the /drawable/ folders in #2 result in different-sized files. Perhaps the build process runs something akin to pngcrush? Regardless, I was wondering if anyone knew where to find a detailed description of all the optimizations in the Android build process. I don't want to waste my time trying to optimize what is already automated, and also I think it'd help my understanding of the resulting apk. Does anyone know if this is documented anywhere?

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• Bubble Breaker Game Solver better than greedy?

  - by Gregory

  For a mental exercise I decided to try and solve the bubble breaker game found on many cell phones as well as an example here:Bubble Break Game The random (N,M,C) board consists N rows x M columns with C colors The goal is to get the highest score by picking the sequence of bubble groups that ultimately leads to the highest score A bubble group is 2 or more bubbles of the same color that are adjacent to each other in either x or y direction. Diagonals do not count When a group is picked, the bubbles disappear, any holes are filled with bubbles from above first, ie shift down, then any holes are filled by shifting right A bubble group score = n * (n - 1) where n is the number of bubbles in the bubble group The first algorithm is a simple exhaustive recursive algorithm which explores going through the board row by row and column by column picking bubble groups. Once the bubble group is picked, we create a new board and try to solve that board, recursively descending down Some of the ideas I am using include normalized memoization. Once a board is solved we store the board and the best score in a memoization table. I create a prototype in python which shows a (2,15,5) board takes 8859 boards to solve in about 3 seconds. A (3,15,5) board takes 12,384,726 boards in 50 minutes on a server. The solver rate is ~3k-4k boards/sec and gradually decreases as the memoization search takes longer. Memoization table grows to 5,692,482 boards, and hits 6,713,566 times. What other approaches could yield high scores besides the exhaustive search? I don't seen any obvious way to divide and conquer. But trending towards larger and larger bubbles groups seems to be one approach Thanks to David Locke for posting the paper link which talks above a window solver which uses a constant-depth lookahead heuristic.

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• Are web-safe colors still relevant?

  - by Gavin Miller

  Since the vast majority of monitors are 16-bit color or more, including mobile devices, does it make sense to even consider web-safe colors when choosing color schemes? Or is it something that ought to be relegated to history as a piece of trivia? For those of you that don't know what web-safe colors are: Another set of 216 color values is commonly considered to be the "web-safe" color palette, developed at a time when many computer displays were only capable of displaying 256 colors. A set of colors was needed that could be shown without dithering on 256-color displays; the number 216 was chosen partly because computer operating systems customarily reserved sixteen to twenty colors for their own use; it was also selected because it allows exactly six shades each of red, green, and blue (6 × 6 × 6 = 216). The list of colors is often presented as if it has special properties that render them immune to dithering. In fact, on 256-color displays applications can set a palette of any selection of colors that they choose, dithering the rest. These colors were chosen specifically because they matched the palettes selected by the then leading browser applications. [Wikipedia]

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• Newbie question about Java

  - by Rob Nicholson

  Okay, I know that Java is a language but somebody has asked me if they can write a web application to interface in with a web app I've written in ASP.NET. I'm implementing a web service to serve up an XML so it's pretty language agnostic. However, I'm not 100% sure whether going down the Java route makes a lot of sense. I was kind of expecting PHP or ASP.NET server side code with maybe some Ajax/JavaScript or maybe a heavier client JavaScript program using JScript. Could some kind sole explain the basic Java environment when it comes with webapps. I've inferred the following - am I barking up the right tree? Java when run like ASP.NET is called JSP JavaBeans is a bit like the .NET framework, i.e. it's a library of re-usable components Java EE is a bit like ASP.NET in that it's a framework for building web pages on a server Java can also run on the client but it needs the Java VM installing When running Java on the client, can you use JavaBeans and is there a framework? Can it also use JScript? I don't think so as JScript is JavaScript library. Whilst running Java on the server would be okay, this is a relatively small application and therefore Java sounds like a bit of overkill. PHP or ASP.NET feels a better fit. But I don't think they should go down the Java applet in the browser and it adds complexity that's not needed. Thanks, Rob.

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• Running Magento for multiple clients - single Installaton vs. multiple installations

  - by Chris Hopkins

  Hi There I am looking to set-up a Magento (Community Edition) installation for multiple clients and have researched the matter for a few days now. I can see that the Enterprise Edition has what I need in it, but surprisingly I am not willing to shell out the $12,000 odd yearly subscription. It seems there are a few options available to be but I am worried about the performance I will get out of the various options. Option 1) Single install using AITOC advanced permissions module So this is really what I am after; one installation so that I can update my core files all at the same time and also manage all my store users from one place. The problems here are that I don't know anything about the reliability of this extra product and that I have to pay a bit extra. I am also worried that if I have 10 stores running off this one installation it might all slow down so much and keel over as I have heard allot about Magento's slowness. Module Link: http://www.aitoc.com/en/magentomods_advanced_permissions.html Option 2) Multiple installations of Magento on one server for each shop So here I have 10 Magento installations on one server all running happily away not using any extra money, but I now have 10 separate stores to update and maintain which could be annoying. Also I haven't been able to find a whole lot of other people using this method and when I have they are usually asking how to stop their servers from dying. So this route seems like it could be even worse on my server as I will have more going on on my server but if my server could take it each Magento installation would be simpler and less likely to slow down due to each one having to run 10 shops on its own? Option 3) Use lots of servers and lots of Magento installations I just so do not want to do this. Option 4) Buy Magento Enterprise I do not have the money to do this. So which route is less likely to blow up my server? And does anyone have experience with this holy grail of a module? Thanks for reading and thanks in advance for any help - Chris Hopkins

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• Compiling Visual c++ programs from the command line and msvcr90.dll

  - by Stanley kelly

  Hi, When I compile my Visual c++ 2008 express program from inside the IDE and redistribute it on another computer, It starts up fine without any dll dependencies that I haven't accounted for. When I compile the same program from the visual c++ 2008 command line under the start menu and redistribute it to the other computer, it looks for msvcr90.dll at start-up. Here is how it is compiled from the command line cl /Fomain.obj /c main.cpp /nologo -O2 -DNDEBUG /MD /ID:(list of include directories) link /nologo /SUBSYSTEM:WINDOWS /ENTRY:mainCRTStartup /OUT:Build\myprogram.ex e /LIBPATH:D:\libs (list of libraries) and here is how the IDE builds it based on the relevant parts of the build log. /O2 /Oi /GL /I clude" /I (list of includes) /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_UNICODE" /D "UNICODE" /FD /EHsc /MD /Gy /Yu"stdafx.h" /Fp"Release\myprogram" /Fo"Release\\" /Fd"Release\vc90.pdb" /W3 /c /Zi /TP /wd4250 /vd2 Creating command line "cl.exe @d:\myprogram\Release\RSP00000118003188.rsp /nologo /errorReport:prompt" /OUT:"D:\myprgram\Release\myprgram.exe" /INCREMENTAL:NO /LIBPATH:"d:\gtkmm\lib" /MANIFEST /MANIFESTFILE:"Release\myprogam.exe.intermediate.manifest" /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /DEBUG /PDB:"d:\myprogram\Release\myprogram.pdb" /SUBSYSTEM:WINDOWS /OPT:REF /OPT:ICF /LTCG /ENTRY:"mainCRTStartup" /DYNAMICBASE /NXCOMPAT /MACHINE:X86 (list of libraries) Creating command line "link.exe @d:\myprogram\Release\RSP00000218003188.rsp /NOLOGO /ERRORREPORT:PROMPT" /outputresource:"..\Release\myprogram.exe;#1" /manifest .\Release\myprogram.exe.intermediate.manifest Creating command line "mt.exe @d:\myprogram\Release\RSP00000318003188.rsp /nologo" I would like to be able to compile it from the command line and not have it look for such a late version of the runtime dll, like the version compiled from the IDE seems not to do. Both versions pass /MD to the compiler, so i am not sure what to do.

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