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  • Sharing a fabfile across multiple projects

    - by Matthew Rankin
    Fabric has become my deployment tool of choice both for deploying Django projects and for initially configuring Ubuntu slices. However, my current workflow with Fabric isn't very DRY, as I find myself: copying the fabfile.py from one Django project to another and modifying the fabfile.py as needed for each project (e.g., changing the webserver_restart task from Apache to Nginx, configuring the host and SSH port, etc.). One advantage of this workflow is that the fabfile.py becomes part of my Git repository, so between the fabfile.py and the pip requirements.txt, I have a recreateable virtualenv and deployment process. I want to keep this advantage, while becoming more DRY. It seems that I could improve my workflow by: being able to pip install the common tasks defined in the fabfile.py and having a fab_config file containing the host configuration information for each project and overriding any tasks as needed Any recommendations on how to increase the DRYness of my Fabric workflow?

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  • Is there any conflict between NFS and calling getFD().sync()?

    - by Dr.Dredel
    My boss is worried that our NFS file system will not be happy with the jboss run java process calling getFD().sync on the files we are writing. We have noticed that frequently the time stamp on the created file is minutes (sometimes as many as 15 minutes) after the log claims the file was finished writing. My only guess is that the NFS is hanging on to the file in memory and not writing it till it feels like it. sync should solve that probelm, right? I also noticed that there is never a close() called on the file. Wondering if that could have been the cause as well? any thoughts appreciated.

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  • Processing large recordsets in Rails

    - by japancheese
    Hello, I'm trying to perform a daily operation on a larger than normal dataset (2m+ records). However, Rails seems to take a very long time performing operations on such a dataset. Operations like Dataset.all.each do |data| ... end take a very long time to complete (I assume this is because it can't fit all the items into memory at once, right?). Does anyone have any strategies on how I could handle this situation? I know SQL would probably speed up the process, but I'm looking to use the Rails environment as I can do many more complicated things to the data than I can with just SQL statements.

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  • How to detect an active x component that does not respond any more?

    - by koschi
    My application is written in C++ and uses the Qt framework. I use the QAxWidget class to access an active x component. Now I need some kind of mechanism that notifies my application each time the active x component has crashed or does not respond any more (due to dead lock or infinite loop). (1) can easily been done by watching the external process of the active x component. But maybe there is a more elegant approach? But how can (2) be implemented?

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  • Stringification of a macro value

    - by SF.
    I faced a problem - I need to use a macro value both as string and as integer. #define RECORDS_PER_PAGE 10 /*... */ #define REQUEST_RECORDS \ "SELECT Fields FROM Table WHERE Conditions" \ " OFFSET %d * " #RECORDS_PER_PAGE \ " LIMIT " #RECORDS_PER_PAGE ";" char result_buffer[RECORDS_PER_PAGE][MAX_RECORD_LEN]; /* ...and some more uses of RECORDS_PER_PAGE, elsewhere... */ This fails with a message about "stray #", and even if it worked, I guess I'd get the macro names stringified, not the values. Of course I can feed the values to the final method ( "LIMIT %d ", page*RECORDS_PER_PAGE ) but it's neither pretty nor efficient. It's times like this when I wish the preprocessor didn't treat strings in a special way and would process their content just like normal code. For now, I cludged it with #define RECORDS_PER_PAGE_TXT "10" but understandably, I'm not happy about it. How to get it right?

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  • input URL, output contents of "view page source", i.e. after javascript / etc, library or command-li

    - by Ryan Berckmans
    I need a scalable, automated, method of dumping the contents of "view page source" (DOM) to a file. Programs such as wget or curl will non-interactively retrieve a set of URLs, but do not execute javascript or any of that 'fancy stuff'. My ideal solution looks like any of the following (fantasy solutions): cat urls.txt | google-chrome --quiet --no-gui \ --output-sources-directory=~/urls-source (fantasy command line, no idea if flags like these exist) or cat urls.txt | python -c "import some-library; \ ... use some-library to process urls.txt ; output sources to ~/urls-source" As a secondary concern, I also need: dump all included javascript source to file (a la firebug) dump pdf/image of page to file (print to file)

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  • How are clientside security vulnerabilities generally discovered?

    - by Jehjoa
    I mean in operating systems or their applications. The only way I can think of is examine binaries for the use of dangerous functions like strcpy(), and then try to exploit those. Though with compiler improvements like Visual Studio's /GS switch this possibility should mostly be a thing of the past. Or am I mistaken? What other ways do people use to find vulnerabilities? Just load your target in a debugger, then send unexpected input and see what happens? This seems like a long and tedious process. Could anyone recommend some good books or websites on this subject? Thanks in advance.

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  • YouTube app failes to open up when launched.

    - by user354738
    Below logs gives any clue ? The app just opens up (we could just see the tite of the app as YouTube and it goes back to launcher tray immd.) cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.google.android.youtube/.HomeActivity } 05-31 14:06:41.655: INFO/ActivityManager(1102): Start proc com.google.android.youtube for activity com.google.android.youtube/.HomeActivity: pid=2977 uid=10041 gids={3003} 05-31 14:06:41.655: DEBUG/KeyguardViewMediator(1102): setHidden false 05-31 14:06:41.796: INFO/foo(1102): ********** resuming: 1144012408 05-31 14:06:41.897: INFO/ActivityThread(2977): Publishing provider com.google.android.youtube.SuggestionProvider: com.google.android.youtube.suggest.SuggestionProvider 05-31 14:06:41.960: INFO/YouTube(2977): Distribution channel:mvapp-android-google 05-31 14:06:42.116: INFO/AndroidRuntime(2977): AndroidRuntime onExit calling exit(-42) 05-31 14:06:42.116: INFO/dalvikvm(2977): In threadExitCheck 0xbdb0 05-31 14:06:42.116: ERROR/dalvikvm(2977): Native thread exited without telling us 05-31 14:06:42.116: ERROR/dalvikvm(2977): Native thread 2977 status: 7 05-31 14:06:42.124: DEBUG/KeyguardViewMediator(1102): setHidden false 05-31 14:06:42.139: INFO/ActivityManager(1102): Process com.google.android.youtube (pid 2977) has died

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  • SVN - How to export changed files in dependency project when create updates?

    - by Relax
    I have a project with it depends on another project Core, i use svn:external to maintain the dependency. when i go to create an update of my project, i export those changed files of two tags of my project, but the changed files in Core won't be exported. For example, my project 2.0 depends on Core 1.0, where 3.0 depends on Core 2.0, then i create an update, changed files of my project 3.0 will all be exported, but none of those in Core 2.0 This can be done thru a two-steps process, first export changed files of the project 3.0, then the Core 2.0, it is ok if i can remember it everytime when i create an update, but in case i forget someday, the broken update will most probably cause a crash. I wonder, is there a way to cover this situation in TortoiseSVN, will let me do it in one operation? I use TortoiseSVN + VisualSVN

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  • More threads and orientation changes questions.

    - by synic
    When it comes to threads and orientation changes, it seems the normal thing to do is something like this: public class Bwent extends Activity { private static Bwent instance; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); instance = this; } //... That way, if you're making a network request with a thread, and someone changes the orientation of the phone, the thread will know to use the new Activity. However, is it possible that the thread could finish during the time Android is destroying the old Activity and creating a new one? Is there a moment in the process where the thread still might be pointing to the wrong Activity, or a partially destroyed activity? It seems like there shouldn't be, but even using a Handler created in the main thread, I'm having intermittent issues with a thread trying to update an object that no longer exists. It's rare, but it does happen.

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  • How can I notify an application of a programmatically set scrollbar value?

    - by Frerich Raabe
    My code involves standard Scroll Bar control and it happens that I need to change its value programmatically in some cases. I do this using SetScrollInfo function, as in this example: void setScrollBarValue( HWND scrollBar, int value ) { SCROLLINFO si = { sizeof( SCROLLINFO ); } si.fMask = SIF_POS; si.nPos = value; ::SetScrollInfo( scrollBar, SB_CTL, &si, true /* redraw */ ); } This appears to work fine (the thumb of the scrollbar moves around) but it fails to notify the rest of the application of the new scrollbar value. For instance, an edit control which uses the scroll bar (much like in the Windows notepad application) fails to scroll around because it doesn't get notified about the new scrollbar value. In case it matters: the scrollbar I'm modifying is not in the same process as the above setScrollBarValue function. Does anybody know how to achieve this?

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  • Processing XML file with Huge data

    - by Manish Dhanotiya
    Hi,be m I am working on an application which has below requiements - 1. Download a ZIP file from a server. 2. Uncompress the ZIP file, get the content (which is in XML format) from this file into a String. 3. Pass this content into another method for parsing and further processing. Now, my concerns here is the XML file may be of Huge size say like '100MB', and my JVM has memory of only 512 MB, so how can I get this content into Chunks and pass for Parsing and then insert the data into PL/SQL tables. Since there can be multiple requests running at the same time and considering 512MB of memory what will be the best possible to process this. How I can get the data into Chunks and pass it as Stream for XML parsing. I googled on this, but didnt find any implementation. :( Thanks,

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  • Providing updates during a long Rails controller action

    - by highBandWidth
    I have an action that takes a long time. I want to be able to provide updates during the process so the user is not confused as to whether he lost the connection or something. Can I do something like this: class HeavyLiftingController < ApplicationController def data_mine render_update :js=>"alert('Just starting!')" # do some complicated find etc. render_update :js=>"alert('Found the records!')" # do some processing ... render_update :js=>"alert('Done processig')" # send @results to view end end

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  • Java - Loading dlls by a relative path and hide them inside a jar

    - by supertreta
    Hi guys, I am developing a Java application that should be release as a jar. This program depends on c++ external libraries called by JNI. To load them, I use the method System.load with an absolute path and this works fine. However, I really want to "hide" them inside the jar, so I have created a package to collect them. This forces me to load an relative path - the package path. By this approach, I let the user run the jar in any directory, without being worried about linking the dll's or bored with a previous installation process. This throws the expected exception: Exception in thread "main" java.lang.UnsatisfiedLinkError: Expecting an absolute path of the library How can I get this working? Thanks for your help!

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  • Writing to CSV issue in Spyder

    - by 0003
    I am doing the Kaggle Titanic beginner contest. I generally work in Spyder IDE, but I came across a weird issue. The expected output is supposed to be 418 rows. When I run the script from terminal the output I get is 418 rows (as expected). When I run it in Spyder IDE the output is 408 rows not 418. When I re-run it in the current python process, it outputs the expected 418 rows. I posted a redacted portion of the code that has all of the relevant bits. Any ideas? import csv import numpy as np csvFile = open("/train.csv","ra") csvFile = csv.reader(csvFile) header = csvFile.next() testFile = open("/test.csv","ra") testFile = csv.reader(testFile) testHeader = testFile.next() writeFile = open("/gendermodelDebug.csv", "wb") writeFile = csv.writer(writeFile) count = 0 for row in testFile: if row[3] == 'male': do something to row writeFile.writerow(row) count += 1 elif row[3] == 'female': do something to row writeFile.writerow(row) count += 1 else: raise ValueError("Did not find a male or female in %s" % row)

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  • Converting an IP address to a number:

    - by Quandary
    Question: When I convert the IP address 192.168.115.67 to a number, is it done like this: 192*256^3 + 168*256^2+115*256^1+67*256^0 = 3232265027 or like this: 192*256^0 + 168*256^1+115*256^2+67*256^3 = 1131653312 I find both variants online, and frankly it doesn't matter as long as reverse it according to the conversion process. But I want to calculate the IP V6 from the IPv4 address, and it seems both variants are on the web... resulting in different IPv6 addresses, and only one can be correct... I use the 1131653312 variant, as 1131653312 is the variant .NET gives me, but 3232265027 is the variant I find on the web for IPv4 to IPv6 conversion...

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  • Automatically taking screenshots of program window

    - by Sergey Kornilov
    I'm looking for a software that combines macro recording with screenshot taking capabilities. We have a software manual with a number of screenshots. When new version of software is released we need to update most of screenshots and we have to do it manually. Now we started translating manual to several languages and number of screenshots to take have increased ten fold. We'd like to automate this process. There will be a recorded macro or something that clicks button within our software and takes screenshots of the program window. Better yet, we can specify the name of each screenshot individually though it's less important. Does such a thing exist?

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  • Getting Top (starting no , Ending no) rows from sqlserver

    - by Krishna Thota
    I'm using Grid view in my asp.net page and I'm fetching data from SQL Server and placing in my grid view. Now my problem is, I'm using paging and placing 50 rows per page in Grid view. I would like to fetch top 50 rows from database in the start up and bind to the Grid View and when i click on next page, then again go to the database and fetch Second Top 50 rows and bind to GV. and this process hasto continue until last row is fetched from Database. Can you tell me How to write Query in achieving this??

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  • PHP no wait sem_acquire?

    - by SerEnder
    Not a specific code question, but more of a general coding question. I'm trying to use a semaphore in a work project to limit the number of users that can access certain processes at a concurrent time. From my understanding the following: $iKey = ftock($sSomeFileLocation,'sOneCharacterString'); //Generate the key if($sem_id = sem_get($iKey){ //1 user allowed if(sem_acquire($sem_id)){ //Do the limited process here sem_release($sem_id); } } The problem that I see here is that if there is already one user who has the semaphore key, then the next user just waits until the first user is done rather than just faulting out. Anyone know of a way that if the max_acquire number has been reached, sem_acquire (or similar) will just return false? Thanks

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  • Is MS Access still the most efficient RAD tool for small-scale custom apps?

    - by FastAl
    Of the many other development tools I've used, nothing holds a candle to the 'Functionality to Development Effort' ratio of MS Access. The reason I am asking is that I have been out of the language selection process for a few years, working on a large .Net system, and am only anecdotally familiar with the latest development tools outside the .Net world. I'm well aware of the limitations of Access, but for a limited concurrency (usually only 1 user at a time), small business, custom app, has anybody found a comparable end-to-end solution or combination that comes close? It doesn't have to be free, open source, or even Windows based. It just has to allow the same speed of development and maintenance, and maybe even provide some additional amenities like seamless autointegration with a server-based DB Engine (like Access does with its own 'Jet' dbms), better web support, and a file format more compatible with source control. I don't want to miss out on anything. Please share your development experience with your suggestions. Thanks.

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  • Creating a WCF Restful service, concurrency issues

    - by pmillio
    Hi i am in the process of creating a restful service with WCF, the service is likely to be consumed by at least 500 people at any given time. What settings would i need to set in order to deal with this. Please give me any points and tips, thanks. Here is a sample of what i have so far; [ServiceBehavior(IncludeExceptionDetailInFaults = true, InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)] And this is an example of a method being called; public UsersAPI getUserInfo(string UserID) { UsersAPI users = new UsersAPI(int.Parse(UserID)); return users; } [OperationContract] [WebGet(BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Json, UriTemplate = "User/{UserID}")] [WebHelp(Comment = "This returns a users info.")] UsersAPI getUserInfo(string UserID);

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  • How to make Cutsomized Setup and Deployment

    - by deepu
    I'm currently developing a window application in VS2005,i need to make a setup of the product..and i had used setup and deployment project in VS2005 and created the setup but in the setup process... dialogs cannot be modified.. according to my needs...(ie it will be the same for all products installation only can change the heading , product name or top-banner) i like to make a setup the look the normal software installation...(like Visual studio ,photo shop installation)how is it possible to make a custom setup method..Is there any Custom setup & deployment method which is easy to do...plss help..me to create a better view during the product installation

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  • how to handle db concurrency in client-server application in C#?

    - by RAJ K
    I am developing an application in C# WPF which will have Client-Server architecture (Client will do products sales billing). I am novice in this area and I asked this question to start my development process. Click here to view question. So, ultimately I have selected MySQl, WCf & WPF. Now I have one silly question. Do i need to handle DB concurrency explicitly in my application (like 3 clients inserting data same time) or MySQl will handle this without any conflict? To accomplish my project i thought, I will create a service in WCf which will do DB queries from client application. Do you have any suggestion to improve my application performance.

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  • Your opinion on the best jquery book

    - by Seattle Leonard
    Hello all, I'm looking to purchase a jquery book. I'm a strong C# developer whose had experience with dojo. Now, I'm building my own site and am looking to learn a new platform in the process. So, I've chosen jquery. With dojo, I know how to make my own widgets. I want to learn about ways to plug into jquery to make reusable controls. Also, I plan to make heavy use of json with ajax. Other things to consider: I would call my javascript expertise as intermediate. I'd like to find a book that is as up to date with the jquery platform as possible as I know that in a few months it will likely be out of date. What book or books would you reccomend?

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  • Noob tab widget example not running

    - by michbeck
    hey all, i'm trying to reproduce the tabwidget example (http://developer.android.com/resources/tutorials/views/hello-tabwidget.html). i'm not really sure what's the problem, i've git no errors while compiling, but i cannot see the application on emulators screen :-/ would be excellent if maybe anyone could have a look at my classes and tell me what's my mistake? I've packed my project here: http://etanto.com/TabTest.zip thanx a lot in advance, folks! michbeck here's the console dump while the run: [2010-06-10 09:18:34 - TabTest] Launching a new emulator with Virtual Device 'Virtual1' [2010-06-10 09:18:35 - TabTest] New emulator found: emulator-5554 [2010-06-10 09:18:35 - TabTest] Waiting for HOME ('android.process.acore') to be launched... [2010-06-10 09:19:05 - TabTest] WARNING: Application does not specify an API level requirement! [2010-06-10 09:19:05 - TabTest] Device API version is 8 (Android 2.2) [2010-06-10 09:19:05 - TabTest] HOME is up on device 'emulator-5554' [2010-06-10 09:19:05 - TabTest] Uploading TabTest.apk onto device 'emulator-5554' [2010-06-10 09:19:05 - TabTest] Installing TabTest.apk... [2010-06-10 09:19:22 - TabTest] Success! [2010-06-10 09:19:22 - TabTest] \TabTest\bin\TabTest.apk installed on device [2010-06-10 09:19:22 - TabTest] Done!

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