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• Subnav "active" when it shouldn't be.

  - by wilwaldon

  http://wilwaldon.com/itsbroken/templateleftnav.php As you can see on the left navigation the link for Template 01 is highlighted green. The link underneath is also highlighted green. I think the problem lies with the initial LI controlling the ul underneath somehow. I need to keep the xhtml formatted exactly how it is right now and only change the CSS to fix this problem. I'd appreciate any help you may be able to point me in the right direction, I'm pretty stuck at this point. Thank you in advance!

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• Error compiling flex (the lexical analyzer)

  - by Maulrus

  I'm trying to install flex on my Windows computer. I have MSYS installed. I untar flex, ./configure it, but when I try to make it, I get this error: In file included from ccl.c:34: flexdef.h:94:19: error: regex.h: No such file or directory In file included from ccl.c:34: flexdef.h:1195: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'regex_linedir' flexdef.h:1197: error: expected ')' before '*' token flexdef.h:1198: error: expected ')' before '*' token flexdef.h:1199: error: expected ')' before '*' token flexdef.h:1200: error: expected ')' before '*' token flexdef.h:1201: error: expected ')' before '*' token flexdef.h:1202: error: expected ')' before '*' token make[2]: *** [ccl.o] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 Until recently, I've only ever installed things using an .exe, so I'm pretty confused by this. Installing bison and m4 both went smoothly, and I'm wondering why this isn't. Any ideas?

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• Architecture of an image hosting site

  - by kamziro

  I'm sure many here are aware of image hosting sites, like imgur, min.us, photobucket etc. Not that I want to develop one, but besides just uploading the file, organising it in some directory somewhere, what architectural considerations are involved in these sites? Especially when there's millions of page views a day (like imgur, I'd imagine) I'm curious about this because it seems that a lot of sites (say, dating websites etc) would be pretty image intensive. Even if it's not for millions of page views, what are some basic architectural requirements of efficient image deliveries online?

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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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• ASP.NET Menu: how to build custom menu

  - by Turi

  hi all, i have this situation: i have to build a menu with datasource from the db, because i have to filter them among the user that is loged in. i have tried building a menu using repeater, and all this works fine till i realized that i wanted the menu with more than two levels. i have also tried with treeview, but i really don't want this solution (problem with the style and the treeview doesn't have a pretty view). Could anyone give me just the idea ? thnx in advance.

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• Best practices book for CRUD apps

  - by Kevin L.

  We will soon be designing a new tool to calculate commissions across multiple business units. This new compensation scheme is pretty clever and well thought-out, but the complexity that the implementation will involve will make the Hubble look like a toaster. A significant portion of the programming industry involves CRUD apps; updating insurance data, calculating commissions (Joel included) ...even storing questions and answers for a programmer Q&A site. We as programmers have Code Complete for the low-level formatting/style and Design Patterns for high-level architecture (to name just a few). Where’s the comparable book that teaches best practices for CRUD?

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• Leak - GeneralBlock-3584

  - by lamicka

  When i try to check leaks of my iPhone App using Instruments, everything is just fine. Same App on actual real device shows this leak for a few times during the app launch. It is pretty non-deterministic and it happens in system libraries. I tried to google down the solution without a luck. Anyone experiencing the same problems? Anyone knows the solution? I find interesting, that every of my leak in code will crash the app sooner or later. These GeneralBlock-3584 leaks keeps app perfectly stable. Might this be reason for AppStore rejection? Thanx for any answer regarding this undocumented problem (Apple is silent unfortunately).

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• How to simulate a fake MouseOver on a Flash applet in a webpage?

  - by Mason Wheeler

  I listen to internet radio at http://player.play.it/player/player.htm and it works pretty well, except for one minor issue. The Flash applet that runs the radio player has a timer on it, where if you don't move the mouse over the player every once in a while, it decides you're idle and shuts off the stream, even if you're not actually idle, but just working on something else with the radio player running in the background. Is there any way I can send a fake MouseOver message to this applet to keep it from cutting me off in the middle of a song, maybe with a GreaseMonkey script? I'm using Firefox.

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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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• Does Visual Studio Localhost ASP.NET debugging allow caching?

  - by Joel

  The title pretty much says it all, but here's the issue. I have an generic handler that returns Javascript; the only line of code that deals with caching that I put in is the following: context.Response.Cache.SetCacheability(HttpCacheability.Public); context.Response.Cache.SetExpires(DateTime.Now.AddYears(1)); context.Response.ContentType = "text/javascript"; context.Response.Write("result"); I'm debugging on localhost. out of Visual Studio 2008, (that's "localhost." so fiddler picks it up) and Fiddler2 sees the expire date, but says that the cache header is set to private, and the page isn't being cached. Can anybody see what's going wrong here?

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• Normalize FFT magnitude to imitate WMP

  - by Bevin

  So, I've been working on a little visualizer for sound files, just for fun. I basically wanted to imitate the "Scope" and "Ocean Mist" visualizers in Windows Media Player. Scope was easy enough, but I'm having problems with Ocean Mist. I'm pretty sure that it is some kind of frequency spectrum, but when I do an FFT on my waveform data, I'm not getting the data that corresponds to what Ocean Mist displays. The spectrum actually looks correct, so I knew there was nothing wrong with the FFT. I'm assuming that the visualizer runs the spectrum through some kind of filter, but I have no idea what it might be. Any ideas?

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• Persist an object that is not marked as serializable

  - by lasseeskildsen

  Hi, I need to persist an object that is not marked with the serializable attribute. The object is from a 3rd party library which I cannot change. I need to store it in a persist place, like for example the file system, so the optimal solution would be to serialize the object to a file, but since it isn't marked as serializable, that is not a straight forward solution. It's a pretty complex object, which also holds a collection of other objects. Do you guys have any input on how to solve this? The code will never run in a production environment, so I'm ok with almost any solution and performance.

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• Is there a way to make sure a background process spawned by my program is killed when my process ter

  - by Davy8

  Basically the child process runs indefinitely until killed in the background, and I want to clean it up when my program terminates for any reason, i.e. via the Taskmanager. Currently I have a while (Process.GetProcessesByName("ParentProcess").Count() 0) loop and exit if the parent process isn't running, but it seems pretty brittle, and if I wanted it to work under debugger in Visual Studio I'd have to add "ParentProcess.vshost" or something. Is there any way to make sure that the child process end without requiring the child process to know about the parent process? I'd prefer a solution in managed code, but if there isn't one I can PInvoke. Edit: Passing the PID seems like a more robust solution, but for curiosity's sake, what if the child process was not my code but some exe that I have no control over? Is there a way to safeguard against possibly creating orphaned child processes?

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• Nested queries in Arel

  - by Schrockwell

  I am attempting to nest SELECT queries in Arel and/or Active Record in Rails 3 to generate the following SQL statement. SELECT sorted.* FROM (SELECT * FROM points ORDER BY points.timestamp DESC) AS sorted GROUP BY sorted.client_id An alias for the subquery can be created by doing points = Table(:points) sorted = points.order('timestamp DESC').alias but then I'm stuck as how to pass it into the parent query (short of calling #to_sql, which sounds pretty ugly). How do you use a SELECT statement as a sub-query in Arel (or Active Record) to accomplish the above? Maybe there's an altogether different way to accomplish this query that doesn't use nested queries?

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• Sort ArrayList of custom Objects by property

  - by Samuel

  Hello World!! :D I had a question which is pretty easy if you know the answer I guess. I read about sorting ArrayLists using a Comparator but somehow in all of the examples people used compareTo which according to some research is a method working on Strings... I wanted to sort an ArrayList of custom objects by one of their properties: a Date object (getStartDay()). Normally I compare them by item1.getStartDate().before(item2.getStartDate()) so I was wondering whether I could write something like: public class customComparator { public boolean compare(Object object1, Object object2) { return object1.getStartDate().before(object2.getStartDate()); } } public class randomName { ... Collections.sort(Database.arrayList, new customComparator); ... } I just started with Java so please forgive my ignorance :) Thanks in advance!! -Samuel

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• iPhone: [subview release] removes my subview from the display

  - by Stefan Klumpp

  I have these two pieces of code. The first one works perfectly: UIView *tmp = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 60.0f, 296.0f, 44.0f)]; [self.dynamicView addSubview:tmp]; [tmp release]; The second one is pretty much the same, but the view doesn't show up. CommentBox *commentBox = [[CommentBox alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 296.0f, 44.0f)]; [self.dynamicView addSubview:commentBox]; [commentBox release]; // Why does this remove the view? If I remove the [commentBox release] the view surprisingly appears. But I don't see a different between these two code snippets. The init for the CommentBox looks like this: - (id)initWithFrame:(CGRect)frame { if ((self = [super initWithFrame:frame])) { // Load the nib: NSArray *nibObjects = [[NSBundle mainBundle] loadNibNamed:@"CommentBox" owner:self options:nil]; self = [nibObjects objectAtIndex:0]; } return self; }

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• How to extend WPF hit testing zone for a Path object.

  - by user275587

  Wpf hit testing is pretty good but the only method I found to extend the hit zone is to put a transparent padding area around your object. I can't find any method to add a transparent area arround a Path object. The path is very thin and I would like to enable hit testing if the user clicks near the path. I can't find any method to extend the path object with a transparent area like the image below : I tried to used a partially transparent stroke brush but I ran into the problem described here : http://stackoverflow.com/questions/1412833/how-can-i-draw-a-soft-line-in-wpf-presumably-using-a-lineargradientbrush I also tried to put an adorner over my line but because of WPF anti-aliasing algorithms, the position is way off when I zoom in my canvas and interfere with other objects hit-testing in a bad way. Any suggestion to extend the hit testing zone would be highly appreciated. Thanks, Kumar

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• Execute PHP without leaving page

  - by Dylan Taylor

  Okay. I have a form - textarea (named "su") and submit button. When the form is submitted, I need to run a PHP script without refreshing/leaving page "echo" or somehow print a return on the screen I'm pretty sure this works via some kind of ajax request thing. but I have no idea what I'm talking about. I'm not big on ajax or javascript, but this is a function i use very frequently and I'd like to learn how it works so I can implement it when i need to now and in the future. Like i said I'm uneducated with ajax or java. a quick example would be wonderful. thanks for taking the time to read!

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• Python "draw() must be called with Label instance as first argument (got _WindowMetaclass instance i

  - by Amorack

  This is a class I made using Python with pyglet to display a window. class Window(pyglet.window.Window): def __init__(self): super(Window, self).__init__() pyglet.text.Label("Prototype") windowText = text.Label.draw(Window, "Hello World", font_name = "Times New Roman", font_size = 36, color = (193, 205, 193, 255)) def on_draw(self): self.clear() self.label.draw() Every time I try to run it I get the error "TypeError: unbound method draw() must be called with Label instance as first argument (got _WindowMetaclass instance instead)". I'm pretty sure I know what I have to do (find how to get Label's instance) just not how to do it. Could someone help me understand how to make this work?

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• DefaultSchedulerService in ASP.NET application

  - by Samir P

  Hi, My project has a requirement to implement look-ahead caching i.e. triggering another request on invokation of a specific request. The following details in short the implementation - HttpModule parses the SOAPRequest and matches entry in a configuration file for look-ahead candidate. If the request matches, it prepares the Parameters dictionary and starts appropriate workflow. Single workflow runtime is used across all requests is ensured through initializing the runtime instance at Application_Start event and stored in Application Dictionary. Using persistence service and DefaultScheduler service. We can't implement windows service model, as current requirement mandates passing the SOAPRequest parameters as arguments. ManualSchedulerService is not in contention due to synchronous nature of it's actual behaviour. Still the performance is pretty bad and product team is not happy. Can anybody suggest me better solution? Thanks, Samir

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• Guessing the time zone from an arbitrary "location" string?

  - by Thomas

  I'm trying to run some statistics over the Stack Overflow data dump, and for that I would like to know the time zone for each user. However, all I have to go on is the completely free-form "location" string. I'll stress that I'm only looking for an approximation of the time zone; of course, in general this is an unsolvable problem. However, many people fill out their country, state and/or city, which should give a pretty good indication. It's okay if it fails for other cases. It doesn't have to be reliable, it doesn't have to be accurate, it doesn't have to cover all bases. I don't want to waste too much time on this, so I'm wondering if there is some code out there that can make a reasonable guess. Any language, platform, API or library goes. Any ideas?

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• Infopath - changing sql servers

  - by ScottStonehouse

  I have an InfoPath form which has sort of a master-detail pattern, with two tables in the underlying main datasource. I am trying to migrate this to a new SQL Server - same database, just moved from a SQL2005 machine to a SQL2008 machine. If I change the servername, it also wants me to change the database and tables. If I select the same database and master table, the bindings are maintains for the master table. But there doesn't appear to be a way to select multiple tables when you change the datasource, so you lose the detail bindings. Am I missing something - I'm pretty new to InfoPath.

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• Convert graph in to data points using Mechanical Turk?

  - by user224303

  I looked around but did not see anyone using Mechanical Turk for this. I've heard of the service, but never used it before. I need to take the following graph and digitize it so I get a list of data points for each line (noting that there are two Y-axes, and thus depends on which line we are talking about). This is pretty time consuming for me, and I saw other posts on StackOverflow about digitizing software doing a poor job at this. Would Mechanical Turk be well suited to my task? Here is the graph for reference: http://www.yourpicturehost.com/dyno_hbspeed.jpg

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• Predict Stock Market Values

  - by mrlinx

  I'm building a web semantic project that gathers the maximum ammount of historic data about a certain company and tries to predict its future market stock values. For data I have the historic stock values (not normalized), news (0 to 1 polarity) and subjective content (also a 0 to 1 polarity). What is the best AI system to train and use for this kind of objective? Is a simple NN with back-propagation training the best I can hope for? update: Everyone is concerned about the quality of this system. Although I'm pretty sure the system is as good as a random prediction (or even worse), this is a school project around artificial intelligence and web semantics. Therefore I'm only concerned in picking the best kind of train method for the data I have (NN, RBF, SVM, Bayes, neuro-fuzzy, etc). Its not about making money.

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• Use of IsAssignableFrom and "is" keyword in C#

  - by fearofawhackplanet

  While trying to learn Unity, I keep seeing the following code for overriding GetControllerInstance in MVC: if(!typeof(IController).IsAssignableFrom(controllerType)) { ... } this seems to me a pretty convoluted way of basically writing if(controllerType is IController) { ... } I appreciate there are subtle differences between is and IsAssignableFrom, ie IsAssignableFrom doesn't include cast conversions, but I'm struggling to understand the implication of this difference in practical scenarios. When is it imporantant to choose IsAssignableFrom over is? What difference would it make in the GetControllerExample? if (!typeof(IController).IsAssignableFrom(controllerType)) throw new ArgumentException(...); return _container.Resolve(controllerType) as IController;

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