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• How do you make a WiX project build when dependent files have changes?

  - by Scott Langham

  Hi, I've adopted a Visual Studio solution that contains a number WiX projects. We build the solution from an MsBuild script to generate the product's installer msi. The problem I'm experiencing is that if I build (and don't rebuild), even if exe's and dll's get updated that need to be put in the installer, the WiX build system doesn't seem to detect this and skips building the installer as it thinks it's already up to date. How do I work out what the dependencies are that are needed to build a WiX project, and how do I tell the Wix build system to watch out for them changing so it knows to build instead of skip?

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• How to refresh site if $_SESSION variable has changed

  - by 4ndro1d

  I'm writing in my $_SESSION variable from a database, when i clicked a link. public function getProjectById($id){ $query="SELECT * FROM projects WHERE id=\"$id\""; $result=mysql_query($query); $num=mysql_numrows($result); while ($row = mysql_fetch_object($result)) { $_SESSION['projectid'] = $row->id; $_SESSION['projecttitle'] = $row->title; $_SESSION['projectinfo'] = $row->info; $_SESSION['projecttext'] = $row->text; $_SESSION['projectcategory'] = $row->category; } } Now my variable is overwritten and I want to show these variables in my index.php like this: <div id="textContent"> <?php if(isset($_SESSION['projecttext']) && !empty($_SESSION['projecttext'])) { echo $_SESSION['projecttext']; }else { echo 'No text'; } ?></div> But of course, my page will not refresh automatically. How can I do that?

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• Building a user subscription application

  - by Tristan O'Neil

  Hello, I'm trying to come up with the best way to handle user subscription and management for our magazine website. What I want to happen is a user purchases a subscription and they are granted online access of a certain membership role for a certain amount of time depending on how many years they subscribed for. I would also like the system to be able to send out emails when a subscription is almost up. I've seen some third party projects to help accomplish this but I'd prefer to write this from scratch as I want total control over how it works. Any suggestions would be helpful. The main thing I can't figure out is how to have an expiring membership. You must keep track of when the user signed up and how long until they should expire.

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• Rails Application expecting me to restart my webrick server for any change in my controller.

  - by Vamsi

  I am working on an existing Rails 2.3.x application, So I was working on it and it was a messy code with great difficulty I was able to run the application. But now for every small change in one of my controller it is expecting me to restart my serer otherwise the changes are not reflecting back, Let's take an example scenario here, Let's just say in one of the before_filter method I just added a puts statement on top of the method and it was not printing in the log, after I restart the server it is printing, Can some one please let me know if I am missing something here.

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• Is there a best practice for maintaining history in a database?

  - by Pete

  I don't do database work that often so this is totally unfamiliar territory for me. I have a table with a bunch of records that users can update. However, I now want to keep a history of their changes just in case they want to rollback. Rollback in this case is not the db rollback but more like revert changes two weeks later when they realized that they made a mistake. The distinction being that I can't have a transaction do the job. Is the current practice to use a separate table, or just a flag in the current table? It's a small database, 5 tables each with < 6 columns, < 1000 rows total.

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• How do you use build labels in publishers in cruisecontrol?

  - by Omnifarious

  I have this section in my CruiseControl config.xml file: <publishers> <onsuccess> <artifactspublisher dest="artifacts/${project.name}" file="projects/${project.name}/fred"/> <execute command="hg -R hg-succeeded/${project.name} pull"/> <execute command="hg -R hg-succeeded/${project.name} tag -l build-${label} -r tip"/> </onsuccess> </publishers> I'm getting tags that look like build-${label}. The ${label} part isn't being replaced by the build label like I expect. I'm expecting something like build.1 to show up in place of ${label}. How do I make this happen? I do have the default labelincrementer configured with a <labelincrementer /> tag in my project. Also, the CruiseControl documentation is absolutely awful. Is there better documentation anywhere?

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• Install the proper bitness Visual C++ Runtime Library via a Setup project

  - by chiru_valentin

  Hi all! The context: I have a solution that contains amongh other C# projects, a VC++ project that suports compiling only as x64 or Win32 (but not Any CPU). In order for the application (which in fact is a macro for a third party application) to run, it requires Visual C++ Runtime libraries (x86) or (x64) (The macro will run on both x64 and x86 operating systems.) The problem: I want to create a Visual Studio setup project that would install the macro on both x86 and x64 operating systems, and the problem I have is to specify what Visual C++ Runtime library to use a prerequisite. If both are selected (x64 and x86) than I have a runtime error message when running the setup.exe, as on x86 operating systems you cannot run x64 executables like the Visual C++ Runtime libraries (x64) kit is...(which the setup calls in the back). So I would need a bitness condition, or something like that to tell the setup what bitness version of the Visual C++ Runtime library to try to install...I'm not sure if this is possible, or even where such a code should be placed in the setup. Thank you for the support, Vali

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• How can I draw a hollow rectangle using CreatePen?

  - by LarsTech

  Since using the DrawArc function in GDI+ isn't very accurate when drawing a small rounded rectangle, I am using RoundRect instead. Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) Dim hDC As IntPtr = e.Graphics.GetHdc Dim rc As New Rectangle(10, 10, 64, 24) Dim hPen As IntPtr = Win32.CreatePen(Win32.PenStyle.PS_SOLID, 0, _ ColorTranslator.ToWin32(Color.Green)) Dim hOldPen As IntPtr = Win32.SelectObject(hDC, hPen) Call Win32.RoundRect(hDC, rc.Left, rc.Top, rc.Right, rc.Bottom, 10, 10) Win32.SelectObject(hDC, hOldPen) Win32.DeleteObject(hPen) e.Graphics.ReleaseHdc(hDC) MyBase.OnPaint(e) End Sub This will draw a nice rounded rectangle, but it will also fill it with a white brush, erasing what I don't want to have erased. How can I draw this without erasing the inside of the rectangle?

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• Python text file processing speed issues

  - by Anonymouslemming

  Hi all, I'm having a problem with processing a largeish file in Python. All I'm doing is f = gzip.open(pathToLog, 'r') for line in f: counter = counter + 1 if (counter % 1000000 == 0): print counter f.close This takes around 10m25s just to open the file, read the lines and increment this counter. In perl, dealing with the same file and doing quite a bit more (some regular expression stuff), the whole process takes around 1m17s. Perl Code: open(LOG, "/bin/zcat $logfile |") or die "Cannot read $logfile: $!\n"; while (<LOG>) { if (m/.*\[svc-\w+\].*login result: Successful\.$/) { $_ =~ s/some regex here/$1,$2,$3,$4/; push @an_array, $_ } } close LOG; Can anyone advise what I can do to make the Python solution run at a similar speed to the Perl solution? I've tried just uncompressing the file and dealing with it using open instead of gzip.open, but that made a very small difference to the overall time.

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• App disappears from Win7's ALT-TAB list sometimes

  - by Mason Wheeler

  I've been having some trouble with one of my Delphi 2010 projects lately. It seems that sometimes, when I have a form open as a modal dialog, the app stops showing up in the ALT-TAB list until I close the dialog. It's still in the Taskbar, but not in ALT-TAB, which means I can't switch to it without using the mouse. Running under Windows 7, 64-bit. Has anyone seen this before? Any idea what causes it and how to fix it?

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• Libraries for making a voice chat application

  - by Eric

  My development team is going to build a voice chat application. Our plan is to use a pre-made library just for this purpose, but we haven't found any good one after days of searching the internet, so I thought I would consider a question here! So the question is: What library / project do you recommend? We are deadly serious with this, so it needs to be a good working one. Preferable an open-source one as well. We have been looking at some XMPP libraries and projects, but none seems to be up-to-date, tested and well-documented.

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• What is the easiest straightforward way of telling which version performs better?

  - by Peter Perhác

  I have an application, which I have re-factored so that I believe it is now faster. One can't possibly feel the difference, but in theory, the application should run faster. Normally I would not care, but as this is part of my project for my master's degree, I would like to support my claim that the re-factoring did not only lead to improved design and 'higher quality', but also an increase in performance of the application (a small toy-thing - a train set simulation). I have toyed with the latest VisualVM thing today for about four hours but I couldn't get anything helpful out of it. There isn't (or I haven't found it) a way to simply compare the profiling results taken from the two versions (pre- and post- refactoring). What would be the easiest, the most straightforward way of simply telling the slower from the faster version of the application. The difference of the two must have had an impact on the performance. Thank you.

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• Vertical positioning of text in table cell

  - by Robert

  When I place an image followed by text in a table cell, the vertical alignment of the text shifts down compared to text in adjacent cells. I tried using a line-height CSS property, but it didn't seem to have an affect. In the following example, I need "123 Description" to be flush with "cell one." Also, there is a space between the image and "123" by default. How can I adjust that - negative margins perhaps? <html <head <style type="text/css" table { border-collapse: collapse; } td { border: thin solid; width: 10em;} /* .adjust-text { line-height: 1.3em; } */ </style </head <body <table <tbody <tr <tdcell one</td <td <img src="small-star.png" / <span class="adjust-text"123 Description</span </td </tr </tbody </table </body </html

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• Saving core data in a thread, how to ensure its done writing before quitting?

  - by Shizam

  So I'm saving small images to core data which take a really short amount of time to save, like .2 seconds but I'm doing it while the user is flipping through a scroll view so in order to improve responsiveness I'm moving the saving to a thread. This works great, everything gets saved and the app is responsive. However, there is one thing in the core-data + multithreading doco that worries me: "In Cocoa, only the main thread is not-detached. If you need to save on other threads, you must write additional code such that the main thread prevents the application from quitting until all the save operation is complete." Ok, how do you do that? It only needs to last ~ .2 seconds and its rarely going to happen since the chance of the app quitting as something is saving is very low. How do I run something on the main thread that'll prevent the app from quitting AND not block the gui? Thanks

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• Different Rendering of SimpleModal on IE7 and Chrome

  - by Silver Gun

  Hey Guys I tried out Simple Modal for my modal dialog needs. The jQuery $(function() { $('#showDialog').click(function() { $('<div><p> Click Here! </p></div>').modal({ overlayClose: true, opacity: 30 }) }); }); The CSS was as follows: #simplemodal-overlay { background-color: #000; } #simplemodal-container { background-color: #333; border: 8px solid #444; padding: 12px; } In IE6 and 7, it displays a nice, very transparent, gray overlay with a dark small box in the middle with the text 'Click Here!'. But in CHROME (4.0.249.43) I get a dark black overlay with 100% opacity. Any ideas? Thanks in advance

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• Problem using Conditional Operation with Nullable Int

  - by Rajarshi

  A small problem. Any idea guys why this does not work? int? nullableIntVal = (this.Policy == null) ? null : 1; I am trying to return 'null' if the left hand expression is True, else 1. Seems simple but gives compilation error - Type of conditional expression cannot be determined because there is no implicit conversion between 'null' and 'int' If I replace the " ? null : 1 " with any valid int, then there is no problem.

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• overiding to_param of a nested attribute

  - by cbrulak

  I'm trying to create a perma link for a nested attribute. For example, look at the links for the answers in SO. I would like to do something similar in rails: I have Project model with multiple tasks and I would like to create a perma link to a task. The task can only viewed with the project, just like Q & A on SO. Ideally, i would do something like: task_helper.rb: def GetTaskURL project = Project.find(:project_id) return project_url(project,:html) + "#" + id end However, i get a method not found. So it seems the only way is to hard-code it: domain.com url + Projects/show/id.html#task.id Must be a better way?

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• Does HTML5 only replace the video aspects of Flash/Silverlight?

  - by John

  I see a lot of talk how HTML5 video tag will kill Flash. But while video is the most widely used part of Flash/SL, it's only a small part of their technical abilities. For instance you can write a game using full 3D graphics and socket connections in Flex, and serious business applications, etc. Is the thinking that Javascript will kill those parts of Flash/Flex/SL? Because while that seems feasible now for even quite rich web-apps, what about any kind of high-performance app like real-time graphics?

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• Load only some columns with Hibernate native SQL queries

  - by Alessandro Dionisi

  I have a table on the database and I want to load only some columns from the result set. I defined a native sql query in the hbm file: <sql-query name="query"> <return alias="r" class="RawData"/> <![CDATA[ SELECT DESCRIPTION as {r.description} FROM RAWD_RAWDATAS r WHERE r.RAWDATA_ID=? ]]> </sql-query> This query however fails with error: could not read column value from result set: RAWDATA1_14_0_; Invalid column name SQL Error: 17006, SQLState: null, because Hibernate tries to load all fields from the result set. I found also a bug in Hibernate JIRA (http://opensource.atlassian.com/projects/hibernate/browse/HHH-3035). Anyone knows how to accomplish this task with a workaround?

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• Explain the code: c# locking feature and threads

  - by Mendy

  I used this pattern in a few projects, (this snipped of code is from CodeCampServer), I understand what it does, but I'm really interesting in an explanation about this pattern. Specifically: Why is the double check of _dependenciesRegistered. Why to use lock (Lock){}. Thanks. public class DependencyRegistrarModule : IHttpModule { private static bool _dependenciesRegistered; private static readonly object Lock = new object(); public void Init(HttpApplication context) { context.BeginRequest += context_BeginRequest; } public void Dispose() { } private static void context_BeginRequest(object sender, EventArgs e) { EnsureDependenciesRegistered(); } private static void EnsureDependenciesRegistered() { if (!_dependenciesRegistered) { lock (Lock) { if (!_dependenciesRegistered) { new DependencyRegistrar().ConfigureOnStartup(); _dependenciesRegistered = true; } } } } }

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• jquery background image fade

  - by Nick

  I am using jQuery to load ina background image that fills the page width / height. I have the following in the Head: $(document).ready(function() { $('body').css({ 'background-image' : 'url({HTML_BASE}images/backgrounds/randoms/{BACK_IMG})', 'background-repeat' : 'no-repeat', 'background-position' : 'center top', 'background-attachment': 'fixed', 'background-size': '100% 100%', }); $('#home-promo').innerfade({ speed: 'slow', timeout: 5000, type: 'sequence', containerheight: 'auto' }); $('.model-search').innerfade({ speed: 'slow', timeout: 5000, type: 'sequence', containerheight: '393' }); }); This works fine and can be seen at http://projects.snowshtechnologies.com/golden_dragon/home/ I want the BG image to fade in from the black background colour. I have looked at a few other threads on Stack that suggest its not possible as a body element defined in css, but in this scenario the BG image is being loaded in by jQuery. How would I go about adding a fade in to this code to bring the image in with a nice fadein?

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• Decoding international chars in AppEngine

  - by Irro

  I'm making a small project in Google AppEngine but I'm having problems with international chars. My program takes data from the user through the url "page.html?data1&data2..." and stores it for displaying later. But when the user are using some international characters like åäö it gets coded as %F4, %F5 and %F6. I assume it is because only the first 128(?) chars in ASCII table are allowed in http-requests. Is there anyone who has a good solution for this? Any simple way to decode the text? And is it better to decode it before I store the data or should I decode it when displaying it to the user.

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• git push hangs and does nothing

  - by coderdave

  I'm new to git and testing it out. I've been able to clone a friends repository make small local changes and commit. I'd like to now test pushing my local changes to the remote repository but unfortunately when I try to do a push $ git push <my friends remote repository <---- hangs here waiting ..I break out by ctr-c Here is some info showing my current status, $ git remote show origin Fetch URL: git://codaset.com/nickbmarine/nickspix.git Push URL: git://codaset.com/nickbmarine/nickspix.git HEAD branch: master Remote branches: Refactor tracked master tracked Local branch configured for 'git pull': master merges with remote master Local ref configured for 'git push': master pushes to master (fast-forwardable) Any idea's?

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• How to put Custom View above built in views in Android?

  - by Lord.F

  Hi All, I am developing a small app for Android. I am creating my own view. I am planning to design the layout to be: <LinearLayout> <MyView> <Button><Button> </LinearLayout> But when I run my program, my custom view will cover the whole screen. Is there anyway to avoid this? I have already tried to add android:layout_width, layout_height to be wrap_content, fill_partent, but no luck.

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• Can I use part of MD5 hash for data identification?

  - by sharptooth

  I use MD5 hash for identifying files with unknown origin. No attacker here, so I don't care that MD5 has been broken and one can intendedly generate collisions. My problem is I need to provide logging so that different problems are diagnosed easier. If I log every hash as a hex string that's too long, inconvenient and looks ugly, so I'd like to shorten the hash string. Now I know that just taking a small part of a GUID is a very bad idea - GUIDs are designed to be unique, but part of them are not. Is the same true for MD5 - can I take say first 4 bytes of MD5 and assume that I only get collision probability higher due to the reduced number of bytes compared to the original hash?

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