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• I'm a PHP programmer, how easy will it be to "master" c++?

  - by ThinkingInBits

  I've been a PHP programmer for 8 or so years, I'm familiar with OOP and try to consider best practices whenever programming. I would like to pick up C++ to possibly enter the 'game development' field, where now I'm doing web dev. I'm not a school person, but was wondering what people think about self-taught math to complement learning c++ for game dev. The last math course I took was algebra 2. Should I start delving myself into pre-calculus? Are there any other suggestions you may have to ease the process?

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• Forms Authentication Across Applications Stopped Working

  - by colleski

  Hi, I have a .net 1.1 ASP application (domain.com) which has a .net 2 virtual directory (domain.com/v2) beneath it, both applications run within their own app pool on the same machine running IIS 6. The web.config files for both apps are setup for Forms Authentication as described here - http://msdn.microsoft.com/en-us/library/eb0zx8fc(v=VS.80).aspx. Users would be directed to the domain.com/v2/login.aspx page which would authenticate for both applications, this configuration has been working fine for the last few years until installing one of the recent Windows 2003 security updates today. Now after authenticating under /v2 users keep getting redirected back to domain.com/v2/Login.aspx as domain.com doesnt see them as authenticated anymore. Any ideas as to which security update would have caused this and if its possible to rollback? I've looked at a few suggestions on this (e.g. Cross app on subdomain form authentication not working) and other sites but no luck so far Any help would be appreciated. Thanks

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• How to add on to an existing onclick event?

  - by Corey Sarnia

  I'm currently writing a Greasemonkey script for a page, so I can't modify the script myself. There is a form submit button on the page. When you click this button, it executes some fancy AJAX calls and such to update the page and do serverside things. What I'm trying to is basically set a "lastClick" value when the button is clicked. I want to add the code GM_setValue("lastClicked", (new Date()).getTime().toString()) to store the last time the button was clicked (for future uses of the script, it will actually do something with this date). How exactly can I accomplish this?

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• Information Modeling

  - by Betamoo

  The sensor module in my project consists of a rotating camera, that collects noisy information about moving objects in the surrounding environment. The information consists of distance, angle and relative change of the moving objects.. The limiting view range of the camera makes it essential to rotate the camera periodically to update environment information... I was looking for algorithms / ways to model these information, in order to be able to guess / predict / learn motion properties of these object.. My current proposed idea is to store last n snapshots of each object in a queue. I take weighted average of positions and velocities of moving object, but I think it is a poor method... Can you state some titles that suit this case? Thanks

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• Returning a href within a string

  - by user701254

  How can I return a href within a string, I can access the start position but not sure how to get last position : Here is what I have so far : String str = "sadf ad fas dfa http:\\www.google.com sdfa sadf as dfas"; int index = str.indexOf("http"); String href = str.substring(index , ???); What should the end index be ? Note, this is targeted at j2me & I need to minimise download footprint so I cannot use regular expressions or third party regular expressions libraries.

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• Porting existing code from C# 2.0 to C#3.0 and .Net 3.5 (possibly .net 4.0)

  - by kanad

  Our one and only enterprise application suite has been developed over last 3 years using C# 2.0 on .Net 3.0. We use winforms and WCF heavily. The development tools is VS 2005 Pro / TFS 2005 / Resharper 3.1 As technical lead I obviously understand the benefits in a move to C#3.0 and .Net 3.5. But I want to convince management for a move to C#3.0, .Net 3.5, VS 2008 and TFS 2008. They will obviously be interested in things like productivity, cost, quality etc. Please suggest me some ideas on how best to make my case. Given that this may not happen till mid next year am I better off to hold till VS 2010 and .Net 4.0 is out.

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• Removing Item From List - during iteration - what's wrong with this idiom ?

  - by monojohnny

  As an experiment, I did this: letters=['a','b','c','d','e','f','g','h','i','j','k','l'] for i in letters: letters.remove(i) print letters The last print shows that not all items were removed ? (every other was). IDLE 2.6.2 >>> ================================ RESTART ================================ >>> ['b', 'd', 'f', 'h', 'j', 'l'] >>> What's the explanation for this ? How it could this be re-written to remove every item ?

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• Android 3.2 HTTP streaming

  - by user1281053

  I'm trying to create an app to stream live TV. Currently the problem I'm facing is that after say 10 minutes of playing, the video will freeze but the audio will carry on. This is on a 1.3mbps stream. I also have lower streams, such as a 384kbps stream, that might last an hour or so, but will still do the same. I've tested this with a local video, that is high quality (file size is 2.3gb) and that has no lag and doesn't freeze at all, so it must be something to do with the way HLS is streamed to android. Does anyone have any idea on how to solve this problem? Thanks

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• php mp3 headers in google chrome

  - by David

  I have this in a php to show a mp3 file, it code works fine on firefox and explorer but in chrome it not work. The chrome player appears but no sound and not increases time $ext = strtolower(substr(strrchr($filename,"."),1)); $ctype="audio/mpeg"; header( 'Expires: Sat, 26 Jul 1997 05:00:00 GMT' ); header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT' ); header( 'Cache-Control: no-store, no-cache, must-revalidate' ); header( 'Cache-Control: post-check=0, pre-check=0', false ); header( 'Pragma: no-cache' ); header("Content-Type: $ctype"); header("Content-Length: ".$len);

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• OpenGL game written in C with a Cocoa front-end I want to port to Windows

  - by Philip

  Hello, I'm wondering if someone could offer me some tips on how to go about this. I have a MacOS X OpenGL game that is written in very portable C with the exception of the non-game-play GUI. So in Cocoa I set up the window and OpenGL context, manage preferences, registration, listen for keystrokes etc. But all of the drawing and processing of input is handled in nice portable C. So I want to port to Windows. I figured the obvious way to go about was to use the Win32 api. Then I started to read a primer on Win32 and began to wonder if maybe life isn't too short. Can I do this in C# (without converting the backend to C#)? I'd rather devote the time to learning C# than Win32. Any suggestions would be most welcome. I really don't know a lick about Windows. The last version I regularly used was 3.1...

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• Why is std::tr1::shared_ptr<>.reset() so expensive?

  - by Paul Oyster

  Profiling some code that heavily uses shared_ptrs, I discovered that reset() was surprisingly expensive. For example: struct Test { int i; Test() { this->i = 0; } Test(int i) { this->i = i; } } ; ... auto t = make_shared<Test>(1); ... t.reset(somePointerToATestObject); Tracing the reset() in the last line (under VC++ 2010), I discovered that it creates a new reference-counting object. Is there a cheaper way, that reuses the existing ref-count and does not bother the heap?

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• Different lib directories of JBpss

  - by Serafeim

  There is a number of different lib directories JBoss (5.1.0) uses: I can find jboss/lib, jboss/lib/endorsed, jboss/common/lib, jboss/server/default/lib and of course the jboss/server/default/deploy/myapp/WEB-INF/lib (am I missing something ?). From the above, I know that I need to use the last one (WEB-INF/lib) to put any jars my app needs. What about all the others ? What is their use and what should I put there ? Why put it there and not in the WEB-INF/lib ? Thanks !

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• Click event not registering on second page.

  - by Cptcecil

  I'm using tablesorter and tablesorter.pager. Here is my code. $(document).ready(function() { $("#peopletable") .tablesorter({ widthFixed: true, widgets: ['zebra'] }) .tablesorterFilter({ filterContainer: $("#people-filter-box"), filterClearContainer: $("#people-filter-clear-button"), filterColumns: [1, 2, 3], filterCaseSensitive: false }) .tablesorterPager({ container: $("#peoplepager") }); $("#peopletable tr.data").click(function() { var personid = $(this).attr('id'); $.ajax({ type: "POST", url: "/Search/GetDocumentsByPerson", data: { "id": personid }, datatype: "json", success: function(data) { var results = eval(data); $("#documentstable > tbody tr").remove(); $.each(results, function(key, item) { $("#documentstable > tbody:last").append(html); }); $("#documentstable").trigger("update"); } }); }); }); Everything works great except when I click on the next page my button click event doesn't fire. Is this a known issue with jquery tablesorter?

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• jQuery can't get if statement to work

  - by jstacks

  I'm looking help with an If Statement. I'm trying to finalize this horizontal scrolling I have and the last bit is to not just disable scrolling when the end is reached, but to also disable (well, change color) the scroll buttons at that point as well. And change back when they are scrollable again. http://jsfiddle.net/stfzy/83/ EDIT* I've updated the JQuery and have everything working except just one if statement: $('div#arrowL').click(function(){ if(index < 0 ){ //can't scroll $('div#arrowL').addClass('active'); } }); I need to add this class back when you can't scroll left anymore. And I think the issue is with the "index < 0" portion but I don't see what I need to change it to to get it to work. Any help is appreciated.

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• Reading programming tutorials while at work

  - by Teifion

  I work in a call centre and have been told by my manager that when there are no calls coming through they're happy for me to read stuff on the internet. There is a net filter in place but I can access SO from work which is always handy. I'm searching for articles that will make me a generally better programmer. I code in Python but combine it with Postgres and JS quite a lot if that helps. I'm currently reading Dive into python3 but I fear it won't last me much longer and would really like to expand my programming ability.

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• mysql row counter

  - by David19801

  Hello, I have a mysql table. It has auto increment on the id. but I regularly delete rows so the numbers are all over the place. I need to get the last n rows out, but because of deletions, the common way of using the max of the autoincremented id column doesn't work well... 1 - Is their another way to get the bottom 50? 2 - Is their a way to get rows by actual row number? so if I have 4 rows labelled 1,2,3,4 delete row 2 then it will become 1,2,3 rather than 1,3,4?

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• javascript really strange behaviour

  - by teehoo

  I have the following code if (msg.position == 0) //removed for brevity else if (msg.position == txtArea.value.length) //removed for brevity } else { //ERROR: should not reach here. errorDivTag.innerHTML += msg.position + " " + txtArea.value.length; } I'm having some really weird situations where I'm getting the error in the last code block, but the printed positions show that msg.position is in fact equal to the txtArea.value.length. This only happens 1% of the time, almost as if I have some kind of race-condition in my code where the two are NOT equal during the second if statement, but equal when I print in the error message. Any ideas?

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• How should I use try...except while defining a function?

  - by SpawnCxy

  Hi all, I find I've been confused by the problem that when I needn't to use try..except.For last few days it was used in almost every function I defined which I think maybe a bad practice.For example: class mongodb(object): def getRecords(self,tname,conditions=''): try: col = eval("self.db.%s" %tname) recs = col.find(condition) return recs except Exception,e: #here make some error log with e.message What I thought is ,exceptions may be raised everywhere and I have to use try to get them. And my question is,is it a good practice to use it everywhere when defining functions?If not are there any principles for it?Help would be appreciated! Regards

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• jQuery Photo Search Results Pagination using AJAX and JSON

  - by Mark Richman

  I have a "photo search" page that needs to present search results in a 5x5 grid of photo thumbnails. I'd like to populate this grid using the JSON results of a jQuery $.ajax() call to my ASP.NET web service. Where I'm struggling is with pagination, where clicking [First][Prev][1][2][3]...[20][21][Next][Last] will call back again via ajax and repopulate the results with the appropriate images. So I need to find a solution to both the pagination control itself and the search results. Is there a jQuery plugin for this, or something I can easily adapt for my purposes?

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• How to add types from external assembly to toolbox control? (WPF)

  - by Louis Rhys

  I am trying to do something like this in my WPF application: ToolboxControl ctrl = new ToolboxControl(); Assembly assembly = Assembly.LoadFile(file); var category = new ToolboxCategory(assembly.GetName().Name); foreach (Type t in assembly.GetTypes()) { var wrapper = new ToolboxItemWrapper(t, t.Name); category.Add(wrapper); } ctrl.Categories.Add(category); i.e. adding ToolboxItemWrappers for each type found in an assembly. However the last line throws the following exception (see image) All dependencies of the external assembly are also referenced in the main (WPF) application. So what's wrong here and how to fix it?

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• Writing array to text file

  - by user3661876

  I have an array, but it won't write each index to the text file. Instead it is only writing the last index and the other indexes are not appearing. Can anyone help me to get the entire array printed to the text file? static void solve(int k) { if (k == N) // We placed N-1 queens (0 included), problem solved! { // Solution found! using (StreamWriter sw = new StreamWriter("names.txt")) { Console.Write("Solution: "); for (int i = 0; i < N; i++) { Console.Write(position[i] + " "); foreach (int s in position[i].ToString()) { string list = position[i].ToString(); sw.Write(list + " "); } } Console.WriteLine(); sum += 1; } }

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• Non-floated div drops below right floated div in IE9 (and 7)

  - by PVA

  This is a responsive site, (http://www.dermatologypartners.com) with desktop styles first. IE8 handles the pages correctly, though without CSS3 flourishes. But IE9 is dropping my navbar (on left) down, when it is up next to the right floated content in all the other browsers. My navbar is near the end of the HTML because I want it to flow over LAST, below page content but above the footer, in the smartphone version of the site -- which it does. The nav is NOT floated. It just rises to the top left and content is floated to the right. Except in IE9. I don't to have to redo all this, if I can just get an IE9 fix. It's not "float drop" - there's plenty of room available. I'm actually having the same problem in IE7, but I'm not concerned with IE7 -- but why 7 & 9, while 8 is fine? Thanks!

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• Getting Popular Topics on a Custom Made Forum

  - by Navarr

  For this website we're working on, we're trying to get the most popular topics (based on how many posts have been made in them within the last 24 hours). We have a medium to large based forum, and the current MySQL query looks like this: SELECT `forums_topics`.*, ( SELECT COUNT(`id`) FROM `forums_posts` WHERE `postdate` > (UNIX_TIMESTAMP()-60*60*24) AND `topicid`=`forums_topics`.`id` ) AS `trendy_threads` FROM `forums_topics` WHERE `deleted`=0 ORDER BY `trendy_threads` DESC,`postdate` DESC LIMIT 3 This unfortunately causes an SQL timeout with just one query and Error 500's. How can we get this information as quickly and as efficiently as possible?

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• C++: Question about freeing memory

  - by Martijn Courteaux

  On Learn C++, they wrote this to free memory: int *pnValue = new int; // dynamically allocate an integer *pnValue = 7; // assign 7 to this integer delete pnValue; pnValue = 0; My question is: "Is the last statement needed to free the memory correctly, completly?" I thought that the pointer *pnValue was still on the stack and new doesn't make any sense to the pointer. And if it is on the stack it will be cleaned up when the application leaves the scope (where the pointer is declared in), isn't it?

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• Does PrinterSettings.GetHdevmode() have a bug?

  - by Brandi

  I would like to be able to change the printer properties without bringing up the printer properties window... Using the DocumentProperties (imported from winspool.drv) function has so far failed, because while it is easy to suppress the dialog from showing up, it seems that the value returned by PrinterSettings.GetHdevmode() is not reflecting the PrinterSettings that is calling it, but instead the value from the previous printer properties returning OK. For example, this gives me the previous (wrong) values from the last call to the properties, instead of the values it should have from the PrinterSettings object: IntPtr hdevmode = PrinterSettings.GetHdevmode(PrinterSettings.DefaultPageSettings); PrinterSettings.SetHdevmode(hdevmode); PrinterSettings.DefaultPageSettings.SetHdevmode(hdevmode); So does GetHdevmode have a bug or is this what its supposed to do? Is there a C# work around for this or does anyone even have any information about it? I have been hard pressed even to find info on the topic. Thanks in advance for any insight.

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