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• Setting up java configurations in eclipse. multiple .param files

  - by Charlie

  I'm going to be using ECJ for doing genetic programming and I haven't touched java in years. I'm working on setting up the eclipse environment and I'm catching a few snags. The ECJ source has several packages, and several sample programs come along with it. I ran one sample program (called tutorial1) by going to the run configurations and adding -file pathToParamsFile to the program arguments. This made it point to the params file of that tutorial and run that sample. In a new example I am testing (from the package gui) there are TWO params files. I tried pointing to just one param file and a program ran in the console, but there was supposed to be a GUI which did not load. I'm not sure what I'm doing wrong. Any help would be greaaatly appreciated.

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• Known "Z notation" applications ?

  - by Amadeus45

  I was just remembering back my university classes and was wondering to know if anyone out here even used the "Z notation" in a professional environment. I honestly must say that it was the single most boring class that I have ever attended in my life. Maybe because of the teacher, but at the time we really all thought it was a big waste of time. I might have been wrong, which is why I'd like to hear you about it. If you are using it or some derived language (Z++), I'd just like to know how is it useful for you. Just curious to know some commonly-known applications of Z or your application. For those who are not familiar : http://staff.washington.edu/jon/z/z-examples.html

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• Google App Engine - low-level datastore API flag?

  - by Keyur

  In my GAE-Java app, I'm using the low-level datastore API. Hence I don't need the GAE app instance to load any of the higher level data access libraries such as JPA, JDO, Data Nucleus, etc. Is there a flag that I can set to indicate that I don't want these libraries to be loaded? My motivation to do this is to reduce app instance startup time everywhere I can. Now I don't know if these libraries are loaded only on-demand or always. The dev environment logs messages related to data nucleus which seems to indicate that some of these libraries may be pre-loaded? I hope I'm wrong here. Thanks, Keyur

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• How to reference the same CodeBehind class from multiple .aspx files (and be able to pre-compile the

  - by thelsdj

  I have a set of aspx pages that each live in their own directory and reference a single aspx.cs code behind file. This has worked fine previously because I never tried to pre-compile the site. IIS must have individually compiled each aspx, linking them to the contents of App_Code but never referencing more than one aspx at a time. Now that I'm trying to pre-compile the website using Web Deployment Projects I keep getting errors about the same class being found in multiple assemblies. I can't just drop the aspx.cs in App_Code and subclass it because it wouldn't be able to find the controls on the .aspx pages when compiling. Maybe I could explicitly define every control on the page in the .cs? But would that allow them to be wired up correctly? Any other ideas on how I can reference the same Page class from multiple .aspx pages and be able to pre-compile the entire website?

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• Android: Displaying Video on VideoView

  - by AndroidDev93

  I'm trying to display a video in my sdcard on the video view. Here is my code: String name = Environment.getExternalStorageDirectory() + "/test.mp4"; final VideoView videoView = (VideoView)findViewById(R.id.videoView1); videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { public void onPrepared(MediaPlayer arg0) { videoView.start(); } }); videoView.setVideoPath(name); The file I am trying to open is called test.mp4 and its located within the sdcard folder. I get an error saying the application has unfortunately stopped. I would appreciate it if someone could help me. Thanks. EDIT : I used the debugger and found out that I get an InvocationTargetException. The detailed message says that : Failure delivering result ResultInfo{who=null, request=1001, result=-1, data=Intent { dat=file:///mnt/sdcard/test.mp4 }} to activity : java.lang.NullPointerException EDIT : I looked at the logcat again and it seems to give the error at videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { I'm guessing either videoView or MediaPlayer is null.

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• How to fit page to Silverlight WebBrowser control?

  - by Igor V Savchenko

  Hello. I use WebBrowser Silverlight 4 control to load some page: <WebBrowser Height="350" Name="webBrowser" Width="400" /> ... webBrowser.Navigate(new Uri("http://mail.live.com")); But page loads with horizontal and vertical scroll bars. So I'm trying to find some ways to get actual size of loaded page (then I can change Height/Width of control) OR change scale of loaded page (to fit it to the actual WebControl control). Is it possible to do with standard WebControl methods?

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• Django: tinyMCE and cross site javascript

  - by pistacchio

  Hi, follow this question, I was able to set some textareas in my admin page as richtext inputs. The most voted answer suggests to follow an example and is what i did. Also, it talks about a problem concerning "blank pages". I'm having the same problem and I'm not able to solve it. I have my media files served by a different server, so MEDIA_URL points to a different host with a different port. To simulate this in my dev environment, I also serve media files from a different port. Debugging the failing javascript, Chrome yelds: Unsafe JavaScript attempt to access frame with URL http://localhost:8000/admin/blog/post/add/ from frame with URL http://localhost:88/s3mangerie/js/tiny_mce/themes/advanced/image.htm. Domains, protocols and ports must match. How to solve this problem? Thanks

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• WPF MediaElement pauses when trying to play Windows Media Center recording

  - by eborlas

  I have an WPF application that starts a live tv recording using Windows Media Center, using the Windows Media Center SDK, waits 2 minutes and then plays the currently recording file (.wtv) in a WPF MediaElement. The problem is that the video visual will freeze and it is not consistent on when it happens. I have looked into it and discovered that the timeline is still moving so the MediaElement still thinks that the video is playing. This happens only when trying to play a video file that is currently being recorded, previously recorded shows play just fine. Both Media Center and Media Player can play those files without any hiccups; it is only the WPF MediaElement that has this problem. Any help would be appreciated.

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• How to implement a countdown clock on a product launch web page?

  - by Daniel Earwicker

  I'm asking this on behalf of a certain corporation: http://www.microsoft.com/visualstudio/en-us/watch-it-live Things to bear in mind: It's 8:30 AM at different times depending on where you are in the world. For example, where I am, it is already 10 AM, whereas in Redmond it's still only 2 AM. That's probably the main thing, I guess. Can any SO users recommend ways to improve the existing countdown page so that it works correctly for users in any timezone? (Serious question - clearly this is a pit that is easy to fall into!)

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• side effect gotchas in python/numpy? horror stories and narrow escapes wanted

  - by shabbychef

  I am considering moving from Matlab to Python/numpy for data analysis and numerical simulations. I have used Matlab (and SML-NJ) for years, and am very comfortable in the functional environment without side effects (barring I/O), but am a little reluctant about the side effects in Python. Can people share their favorite gotchas regarding side effects, and if possible, how they got around them? As an example, I was a bit surprised when I tried the following code in Python: lofls = [[]] * 4 #an accident waiting to happen! lofls[0].append(7) #not what I was expecting... print lofls #gives [[7], [7], [7], [7]] #instead, I should have done this (I think) lofls = [[] for x in range(4)] lofls[0].append(7) #only appends to the first list print lofls #gives [[7], [], [], []] thanks in advance

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• Monkeypatch a model in a rake task to use a method provided by a plugin?

  - by gduquesnay.mp

  During some recent refactoring we changed how our user avatars are stored not realizing that once deployed it would affect all the existing users. So now I'm trying to write a rake task to fix this by doing something like this. namespace :fix do desc "Create associated ImageAttachment using data in the Users photo fields" task :user_avatars => :environment do class User # Paperclip has_attached_file :photo ... <paperclip stuff, styles etc> end User.all.each do |user| i = ImageAttachment.new i.photo_url = user.photo.url user.image_attachments << i end end end When I try running that though I'm getting undefined method `has_attached_file' for User:Class I'm able to do this in script/console but it seems like it can't find the paperclip plugin's methods from a rake task.

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• Does DB2 have an "insert or update" statement?

  - by Mikael Eriksson

  From my code (Java) I want to ensure that a row exists in the database (DB2) after my code is executed. My code now does a select and if no result is returned it does an insert. I really don't like this code since it exposes me to concurrency issuses when running in a multi-threaded environment. What I would like to do is to put this logic in DB2 instead of in my Java code. Does DB2 have an "insert-or-update" statement? Or anything like it that I can use? For example: insertupdate into mytable values ('myid') Another way of doing it would probably be to allways do the insert and catch "SQL-code -803 primary key already exists", but I would like to avoid that if possible.

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• Using Rails 3 and Haml 3, how do I configure Haml?

  - by dpogg1

  I'm using Rails 3.0.0.beta3 and Haml 3.0.0.rc.2, and I can't find where I need to place the configuration lines for Haml (nor what they are in the new version, for that matter). Using Rails 2.3.5 and Haml 2, I would do Haml::Template.options[:format] = :html5 in environment.rb. Or, in Sinatra, set :haml, {:format => :html5} in my main file. But in Rails 3 everything's been changed around, and no matter where I put that configuration line, I get an undefined method or undefined object error.

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• jQuery/Ajax/javascript in FireFox Error when using $.post/$.get

  - by IsenGrim

  uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE)" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: http://localhost/scripts/jQuery.js :: anonymous :: line 808" data: no] Line 0 is the error i get when i bring up firebug. This only happens in firefox (and maybe other browsers) but the code works fine in IE8. I have codes like this in jquery: $("#Logout").live("click", function (e) { e.preventDefault(e); $.post("/logout.php", {}, function () { //--a bunch of animations--// window.location = "/login.php"; } }); I have no idea whats wrong as even the error message is not helpful at all.. inside logout.php: <?php session_start(); session_destroy(); ?> Also dont work if I used GET or inserted phantom data. Or is there a more elegant way to do this?

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• Security precautions and techniques for a User-submitted Code Demo Area

  - by Jack W-H

  Hey folks Maybe this isn't really feasible. But basically, I've been developing a snippet-sharing website and I would like it to have a 'live demo area'. For example, you're browsing some snippets and click the Demo button. A new window pops up which executes the web code. I understand there are a gazillion security risks involved in doing this - XSS, tags, nasty malware/drive by downloads, pr0n, etc. etc. etc. The community would be able to flag submissions that are blatantly naughty but obviously some would go undetected (and, in many cases, someone would have to fall victim to discover whatever nasty thing was submitted). So I need to know: What should I do - security wise - to make sure that users can submit code, but that nothing malicious can be run - or executed offsite, etc? For your information my site is powered by PHP using CodeIgniter. Jack

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• Rails shoulda and factory_girl setup

  - by kristian nissen

  I have installed both shoulda and factory_girl, I can run shoulda just fine, but when I add this: require 'factory_girl' Factory.define :user do |u| u.mail '[email protected]' u.pass 'secret' end to my test/test_helper.rb I'm getting this error: /test/test_helper.rb:1:in `require': no such file to load -- factory_girl (LoadError) when I execute rake test:units I have installed both gems using: sudo gem install thoughtbot-shoulda --source=http://gems.github.com sudo gem install thoughtbot-factory_girl --source=http://gems.github.com and can see both of them being installed fine. And by the way, this works fine as well: script/console Loading development environment (Rails 2.3.8) require 'factory_girl' = [] so requiring the gems seems to be working

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• Fatal Error when using ADODB in VB6 on Windows Server 2003 SP2

  - by m.edmondson

  We've got a legacy app (VB6) which works fine on an old Windows Server 2003 box and has been for many years. Recently we've had to move it to a different physical location and in doing this we cloned the box with virtualisation and placed it elsewhere. In theory these two environments should be identical. On the new box however the app falls over when calling the RecordCount method of an ADODB.Recordset. I should say that I can successfully read the ADODB.RecordSet.Properties.Count property with no problem on the line before. The event viewer reports the following: Event Type: Error Event Source: Application Error Event Category: (100) Event ID: 1000 Date: 28/09/2012 Time: 11:15:27 User: N/A Computer: APP01 Description: Faulting application Control.exe, version 1.0.0.6, faulting module ntdll.dll, version 5.2.3790.4789, fault address 0x0002c6e4. I can only imagine there is something wrong with using ADODB within a virtualised environment. Any ideas?

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• What should I consider when deploying a new web farm?

  - by tsilb

  My web app has been chugging along just great in Production for years with one App server and one Web server. Now we're moving to a multi-server environment with 2 App and 3 Web servers. I have enough time to make changes before the go-live. As a Developer, what considerations should I take into account from coding, deployment, and architectural/ecosystem management perspectives? Already on my list: Remove tight-coupling between servers Applicable files (i.e. downloadables) stored in IMAGE fields in SQL instead of files on app server Deployment: Take out node out of the farm at a time

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• Android HelloWorld Build Path error

  - by BahaiResearch.com

  On my Mac I installed Eclipse, the SDK and created a new project, then hit build expecting to see my first helloworld app. I got the error "the project cannot be built until build path errors are fixed". After going thru all the path-like options in Preferences, I noticed that on the tab "Java Build Path" the "Google APIs [Android 2.2]" option did not have its check box checked. Checking it made the problem go away. It works now and I can see the app in the Emulator Have I not set up my environment correctly? I used all the defaults in Eclipse and the Android SDK.

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• Jquery Event onChange for Div

  - by David

  I have a page with the following two divs: <div id="searchResults"> </div> <div class="postSearchOptions" style="display: none;"> </div> Is there any way that I can make the "postSearchOptions" div appear when the "searchResults" div is updated by an AJAX call? I don't control the AJAX calls and I want to detect any change in the "searchResults" div. I tried writing the following JQuery code, but then realized that it requires Jquery 1.4 and I only have 1.3: $("#searchResults").live("change", function() { $(".postSearchOptions").css("display", "inline"); }); Is there any way to catch the event of the searchResults div changing using either standard JavaScript or Jquery 1.3? Thanks!

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• How can a Windows program temporarily change its time zone?

  - by Rob Kennedy

  I've written a function to return the time_t value corresponding to midnight on a given day. When there is no midnight for a given day, it returns the earliest time available; that situation can occur, for example, when Egypt enters daylight-saving time. This year, the time change takes effect at midnight on the night of April 29, so the clock goes directly from 23:59 to 01:00. Now I'm writing unit tests for this function, and one of the tests should replicate the Egypt scenario. In Unix, I can accomplish it like this: putenv("TZ", "Egypt", true); tzset(); After doing that, further calls to localtime behave as if they're in Egypt instead of Minnesota, and my tests pass. Merely setting the environment variable doesn't have any effect on Windows, though. What can I do to make the unit test think it's somewhere else without affecting the rest of the programs running on the system?

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• What is the effect of running an application with "Unlimited Stack" size

  - by NSA

  Hello All, I have inherited some code that I need to maintain that can be less than stable at times. The previous people are no longer available to query as to why they ran the application in an environment with unlimited stack set, I am curious what the effects of this could be? The application seems to have some unpredictable memory bugs that we cannot find and running the application under valgrind is not an option because it slows the application down so much that we cannot actually run it. So any thoughts on what the effects of this might be are appreciated. Thank you.

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• how to exploit vulnerability of php?

  - by Dr Deo

  i have never seen a buffer overflow exploit in live action. supporse I have found a server that seems to have vulnerabilities. Where can i get proof of the concept code preferably in c/c++ to exploit the vulnerability? eg i found this vulnerability Multiple directory traversal vulnerabilities in functions such as 'posix_access()', 'chdir()', 'ftok()' may allow a remote attacker to bypass 'safe_mode' restrictions. (CVE-2008-2665 and CVE-2008-2666). How can i get proof of concept code for educational purposes PS I am a student and my only desire is to learn

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• Rails - authoritative source for your database schema?

  - by keruilin

  I have Rails app, and every once in a while, when I bring new developer onboard they exclaim that they should be able to produce the current DB schema in their dev environment by running the whole history of the migrations. I personally don't think that migrations is the authoritative source for your schema. Right now what we do is load a production copy of the DB, with the current schema, onto the dev machine. And, from there, the schema can be maintained via incremental migrations. So my question are: What is the authoritative source of your schema on a Rails project? What is now considered the best-practice way to maintain your DB schema?

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• Best Tomcat6 JNDI + Hibernate configuration for session/transaction support

  - by EugeneP

  I use tomcat6 as a servlet container, and need to integrate Hibernate 3.2 into the project. I found a document how to configure SessionFactory lookup through JNDI, though it does not work as expected. Quote: Hibernate works in any environment that uses JTA, in fact, we recommend to use JTA whenever possible as it is the standard Java transaction interface. End of quote. In hibernate config I indicate current_session_context_class = jta and now I get an error "No TransactionManagerLookup specified". The problem is that Tomcat does not support JTA, and to get it worked, if I understand it correctly, you need to add JOTM or other library to Tomcat. But according to quote it is recommended to use JTA. What can you recommend in this situation?

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