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• Visual Studio "Find" results in "No files were found to look in. Find stopped progress."

  - by suryasonti

  Sometimes while developing in Visual Studio IDE, when you use "Find in Files" dialog to find something, the search fails and you will see the following message in the "Find Results" window. "No files were found to look in. Find stopped progress." Once this message shows-up all the subsequent searches will result in the same message. Nothing fixes the problem including restarting computer except Pressing "Ctrl + ScrLk". Does anyone know what causes VisualStudio to get into this state and is there a setting to permanently prevent it from happening?

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• When should you NOT use the asterisk (*) when declaring a variable in Objective C

  - by Jason

  I have just started learning objective c and the asterisk is giving me some trouble. As I look through sample code, sometime it is used when declaring a variable and sometimes it is not. What are the "rules" for when it should be used. I thought it had something to do with the data type of the variable. (asterisk needed for object data types, not needed for simple data types like int) However, I have seen object data types such as CGPoint declared without the asterisk as well? Is there a definitive answer or does it have to do with how and what you use the variable for?

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• serializing JSON files with newlines in Python

  - by user248237

  I am using json and jsonpickle sometimes to serialize objects to files, using the following function: def json_serialize(obj, filename, use_jsonpickle=True): f = open(filename, 'w') if use_jsonpickle: import jsonpickle json_obj = jsonpickle.encode(obj) f.write(json_obj) else: simplejson.dump(obj, f) f.close() The problem is that if I serialize a dictionary for example, using "json_serialize(mydict, myfilename)" then the entire serialization gets put on one line. This means that I can't grep the file for entries to be inspected by hand, like I would a CSV file. Is there a way to make it so each element of an object (e.g. each entry in a dict, or each element in a list) is placed on a separate line in the JSON output file? thanks.

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• How is dynamic memory allocation handled when extreme reliability is required?

  - by sharptooth

  Looks like dynamic memory allocation without garbage collection is a way to disaster. Dangling pointers there, memory leaks here. Very easy to plant an error that is sometimes hard to find and that has severe consequences. How are these problems addressed when mission-critical programs are written? I mean if I write a program that controls a spaceship like Voyager 1 that has to run for years and leave a smallest leak that leak can accumulate and halt the program sooner or later and when that happens it translates into epic fail. How is dynamic memory allocation handled when a program needs to be extremely reliable?

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• Dictionary is returning false on ContainsKey after item is added

  - by Karel Frajtak

  I have a dictionary declared as follows IDictionary<string, object> _objectIds = new Dictionary<string, object>(); I was experiencing some problems with it and it discovered that the instance returned false as a result of ContainsKey method and from the watch window I was sure that the item was there. So I created helper method private bool IdsContainsKey(string key) { lock (syncObject) { lock (_objectIds) { if (_objectIds.ContainsKey(key)) return true; // A if (_objectIds.ContainsKey(key)) return true; // B return _objectIds.ContainsKey(key); // C } } } During my debugging session I run into situation when the method exited in place B and sometimes I made to C returning true. Can anybody help me? Thanks.

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• Diff Algorithm

  - by Daniel Magliola

  I've been looking like crazy for an explanation of a diff algorithm that works and is efficient. The closest I got is this link to RFC 3284 (from several Eric Sink blog posts), which describes in perfectly understandable terms the data format in which the diff results are stored. However, it has no mention whatsoever as to how a program would reach these results while doing a diff. I'm trying to research this out of personal curiosity, because I'm sure there must be tradeoffs when implementing a diff algorithm, which are pretty clear sometimes when you look at diffs and wonder "why did the diff program chose this as a change instead of that?"... Does anyone know where I can find a description of an efficient algorithm that'd end up outputting VCDIFF? By the way, if you happen to find a description of the actual algorithm used by SourceGear's DiffMerge, that'd be even better. NOTE: longest common subsequence doesn't seem to be the algorithm used by VCDIFF, it looks like they're doing something smarter, given the data format they use. Thanks!

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• Prevent Windows Explorer from interfering with Directory operations.

  - by Bruno Martinez

  Sometimes, no "foo" directory is left after running this code: string folder = Path.Combine(Path.GetTempPath(), "foo"); if (!Directory.Exists(folder)) Directory.CreateDirectory(folder); Process.Start(@"c:\windows\explorer.exe", folder); Thread.Sleep(TimeSpan.FromSeconds(5)); Directory.Delete(folder, false); Directory.CreateDirectory(folder); It seems Windows Explorer keeps a reference to the folder, so the last CreateDirectory has nothing to do, but then the original folder is deleted. How can I fix the code?

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• VS 2010 Test Runner error "The agent process was stopped while the test was running."

  - by driis

  In Visual Studio 2010, I have a number of unit tests. When I run multiple tests at one time using test lists, I sometimes reveive the following error for one or more of the tests: The agent process was stopped while the test was running. It is never the same test failing, and if I try to run the test again, it succeeds. I found this bug report on Connect, which seems to be the same problem, but it does not offer a solution. Has anyone else seen this behaviour ? How I can avoid it ?

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• STM32 I2C1 Start bit not set on SR1 register

  - by jramirez

  Hi guys, I am trying to program the stm32 to talk to my i2c EEprom, but it seems like everytime I say: I2C_GenerateSTART(I2C1, ENABLE); while( !(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) ); the code hangs here I went through with the debugger and I found that the SR1 bit 0 flag (which is the start bit generated flag) is not set which is why the code hangs. I can see in the oscilloscope that the start bit was generated and this works sometimes. it usually breaks when I tried to do several writes in a row. I checked the HW is everything looks fine I checked the frequency that I am running on the i2c bus it is 100Khz well within the 24lc1025 eeprom. any ideas, thanks

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• UltiDev Cassini and <system.webServer> web.config settings

  - by Robert Koritnik

  MS Cassini Development Web Server is a nice product that executes web requests in a similar way that IIS7 does. Every request (event for static content) goes through the same .Net pipeline without exception. All custom HttpModule can handle any request. But sometimes you don't want these modules to execute for certain content (most often static content). In this regard, MS Cassini doesn't read/obey <system.webServer> web.config settings like IIS7 does. I'm particularly interested in these settings. <system.webServer> ... <handlers /> <modules /> </syste.webServer> Does UltiDev's Cassini (a separate payable product upgraded from MS Cassini) web server read these settings and execute as the web.config tells it to?

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• Detect block size for quota in Linux

  - by Chen Levy

  The limit placed on disk quota in Linux is counted in blocks. However, I found no reliable way to determine the block size. Tutorials I found refer to block size as 512 bytes, and sometimes as 1024 bytes. I got confused reading a post on LinuxForum.org for what a block size really means. So I tried to find that meaning in the context of quota. I found a "Determine the block size on hard disk filesystem for disk quota" tip on NixCraft, that suggested the command: dumpe2fs /dev/sdXN | grep -i 'Block size' or blockdev --getbsz /dev/sdXN But on my system those commands returned 4096, and when I checked the real quota block size on the same system, I got a block size of 1024 bytes. Is there a scriptable way to determine the quota block size on a device, short of creating a known sized file, and checking it's quota usage?

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• adding to json property that may or may not exist yet

  - by mmcgrail

  let say i want to do this var dasboard = {}; $('.check').click(function(){ $(this).toggleClass("active").siblings().slideToggle('slow', function() { dashboard['pages']['pagename'][$(this).closest('li').attr("id")]['show'] = $(this).is(":hidden") ? 'collapsed' : 'expanded'; }); } i get an error saying 'dashboard.pages is undefined' is there away to dynamically add 'pages' and the children that follow without having to do the work of checking to see if it is defined first then if its not doing dashboard['pages'] = {}; because sometimes they may already exist and I don't want to have to inspect the tree first i just want to build the branches as needed

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• UnitTest++ creates cmd windows, which can't be closed

  - by Simon

  Hello, I have a setup for using UnitTest++ like this in VS2008. Sometimes the cmd window, which shows the console output of the unit tests just hangs. I can move the window, resize and stuff, but I'm unable to close it. I see the window in the App tab of the Task Manager, but not in the Process tab, "Switch to process" doesn't work either. Stop debugging or closing VS is also no help, it seems VS has lost control over this window. If this cmd window is lost, I'm unable to shutdown my computer, which is pretty annoying Any hints?

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• C# - Layout problem on Windows XP professional

  - by Rakib Hasan

  I am developing a C# application with .NET Framework 2.0. The problem is, that on my client's PC, the controls get expanded, layout changes (positions of the controls gets changed), sometimes buttons get missed entirely. It happens even on Forms with 2-3 TextBoxes, 2-3 Buttons and some Labels. I tried a lot of investigations. I tried to show a message in the form's resize event. But it doesn't get called. After digging a bit more, it seemed that in Designer.cs file even though ResumeLayout (false) is being called for the form, but this causes the the expansion/disposition of the controls. My Client is using Windows XP professional on his Dell laptop. He is able to reproduce the issue on other laptops with Windows XP professional. But not in other OSes (like Windows XP Home or Windows Vista). In my desktop with Windows XP professional, it is not reproducible. How can this issue be resolved?

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• MPI: is there mpi libraries capable of message compression?

  - by osgx

  Sometimes MPI is used to send low-entropy data in messages. So it can be useful to try to compress messages before sending it. I know that MPI can work on very fast networks (10 Gbit/s and more), but many MPI programs are used with cheap network like 0,1G or 1Gbit/s Ethernet and with cheap (slow, low bisection) network switch. There is a very fast Snappy (wikipedia) compression algorithm, which has Compression speed is 250 MB/s and decompression speed is 500 MB/s so on compressible data and slow network it will give some speedup. Is there any MPI library which can compress MPI messages (at layer of MPI; not the compression of ip packets like in PPP). MPI messages are also structured, so there can be some special method, like compression of exponent part in array of double.

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• Netstat shows numerous CLOSE_WAIT states for mysql connections

  - by Sudheer

  The output of netstat -an shows many mysql connections in CLOSE_WAIT state and when i checked the processlist in mysql using 'SHOW PROCESSLIST' the connections shown in netstat do not appear. What possible could be the reason for this. I use tomcat with mysql-connector and use a Connection Pool as well. Is it that the application is not closing the mysql connection or is there any other reason for this behaviour... sometimes the CLOSE_WAIT reaches over 200. On the application level i made sure that i close all the connections(make sure i issue a close() command in the finally block) created using jdbc. Any help would be appreciated.

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• Why does Joomla debug show 446 queries logged and 446 legacy queries logged?

  - by Darye

  I have been called in to fix the performance of a Joomla site that was already setup. I look at the debug output and it shows the same queries twice, once for queries logged and again for legacy queries logged. My guess is that it is actually running the same queries twice make for just under 900 queries per page (hope I am wrong) The Legacy plugin is disabled, so Legacy mode is not on at all. The site uses VirtueMart as well (which BTW isn't working properly if the cache in the Global Config is turned on) Besides the fact that I don't think it should be running 446 queries anyway (sometimes even up to 650 per page ), has anyone every experienced this issue, and where would I look to fix this. Thanks

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• Setting outbound 'Expires:' in Squid server's HTTP header

  - by IkeaPimp

  I'm having a problem where items served by my Squid server are being cached by Limelight for too long, sometimes days. It happens when a piece of content has been static for a long time (weeks) and then undergoes numerous changes in a matter of hours. Limelight gets its content from our Squid server and I'm told that if I can add 'Expires: 15m' in the HTTP header the Squid server sends, Limelight will not cache the image for more than 15 min. Unfortunately, I can fond no setting in Squid that will allow me to add this to the header. Here's the HTTP header as presently being sent: HTTP/1.0 200 OK Date: Tue, 15 Dec 2009 23:57:33 GMT Server: nginx/0.5.26 Content-Type: image/jpeg Content-Length: 83843 Last-Modified: Tue, 15 Dec 2009 23:52:00 GMT Accept-Ranges: bytes Age: 450 X-Cache: HIT from squid01.prod.mydomain X-Cache-Lookup: HIT from squid01.prod.mydomain:3128 Via: 1.0 squid01.prod.mydomain:3128 (squid/2.6.STABLE14) Connection: close

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• Parsing an RFC822-Datetime in .NETMF 4.0

  - by chris12892

  I have an application written in .NETMF that requires that I be able to parse an RFC822-Datetime. Normally, this would be easy, but NETMF does not have a DateTime.parse() method, nor does it have some sort of a pattern matching implementation, so I'm pretty much stuck. Any ideas? EDIT: "Intelligent" solutions are probably needed. Part of the reason this is difficult is that the datetime in question has a tendency to have extra spaces in it (but only sometimes). A simple substring solution might work one day, but fail the next when the datetime has an extra space somewhere between the parts. I do not have control over the datetime, it is from the NOAA.

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• ExtJS combo setting problem

  - by Hubidubi

  Hi I run into an interesting problem while was using combos in input form. My form contains combos that get data from json stores. It works fine when adding new record, but when the form is opened for editing an existing record, sometimes the id appears as selected not its value (eg: there's 5 instead of "apple"). I think it tries to set the value before it finishes loading the combo. Is there a way to solve this? I put the code down here that creates combos: function dictComboMaker( store, fieldLabel, hiddenName, name, allowBlank, myToolTipp ) { comboo = { xtype : 'combo', id: 'id-'+name, allowBlank: allowBlank, fieldLabel : fieldLabel, forceSelection : true, displayField : 'value', valueField : 'id', editable: false, name: name, hiddenName : hiddenName, minChars : 2, mode: 'remote', triggerAction : 'all', store : store }; function dictJsonMaker(url) { store = new Ext.data.JsonStore({ root : 'results', // 1 fields : [ 'id','value' ], url : url, autoLoad: true}); return store; } var comboKarStore = dictJsonMaker('/service/karok'); var comboKar= dictComboMaker(comboKarStore, 'Kar', 'karid', 'kar', false, ''); // then comboKar is added to the form Hubidubi

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• Is there an offline version of Smush.it available?

  - by Jonathon Watney

  Sometimes I use Smush.it via the YSlow Firefox plugin to non-destructively reduce the file size of JPG images. Is there an offline version available that runs on Windows? And if not is there an alternative? The reason I'd like an offline version is that I'd like to optimize images before I deploy them. Currently Smush.it accepts only public facing URLs for images or a web page (via YSlow) and can't access my internal network. That means I have to deploy, optimize, replace images and deploy again. I'd really like to deploy the optimized images on the first deploy. Update: Here's a very similar question.

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• How to enable Line numbering in Visual Studio

  - by Cyclone

  Why doesn't VS have any sort of line numbering? Is there any way to enable it, or a plugin for it? I know, the number of lines of code in a program doesn't matter, but sometimes it is nice to know how long a program is, or what line number something is for reference. I can't seem to find that as an option anywhere, to my surprise. Thanks for the help! This is Visual Studio 2010 Ultimate. (if you have read my older questions, I've been using 2008 Express until now.)

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• Differences in behaviour between IIS and the ASP.Net Web Development Server?

  - by Kramii

  During development, I usually test ASP.Net applications using the Web Development Server (sometimes called Cassini). Occasionally, when I publish to a real IIS environment, I notice that the application behaves differently. So, what are the differences between the way that production IIS servers and the ASP.Net Web Development Server behave? I don't mean differences in feature sets (clearly IIS has lots of features that are not present in WDS), but differences in the way they handle ASP.Net. BTW: There are a few differences noted in the responses to this question, but I am sure there must be more.

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• What are some interesting fringe programming topics that might have hands-on training?

  - by hal10001

  Whenever training topic questions are asked, the answers are fairly typical, and involve a pretty limited subset of topics like OO, design patterns, algorithms, web services, SQL, etc., but I wonder if there are some fringe topics that are still applicable to the programming field and would give me a more rounded approach to development. When I think of "fringe", I think of 2600: The Hacker Quarterly articles that discuss how to use real world (sometimes obscure) exploits, or something like Maker Faire that demonstrates embedded systems programming using Arduino. I have around $1500-2000 to spend, and my job entails Java technologies, but that does not limit my options.

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• Cocos2D SpriteSheet animation problem, my number of frames is much larger.

  - by vaibhav-tekam

  Hello, I am trying to use SpriteSheet to run an animation. My frames are of 320x480 in size each, So I am able to put max 6 frames on the texture image. But my animation consists of frame number ranging from 50 to 200 sometimes, and all are of size 320x480. But this much number of frames cannot be added on the Texture image as the size is restricted to 1024x1024. Is there any other approach I can try out. Can I play one animation after the other.And won't it be hampering the performance. Please, I need suggestions. Best, Vaibhav Tekam.

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