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• Invoke or BeginInvoke cannot be called on a control until the window handle has been created

  - by blade3

  I am trying to install SQL Server 2008 Developer Edition x64 on a Windows Server 2008 VM. I run the installer for a standalone installation and this works fine for the setup support rules bit. That passes ok but then I get this error: TITLE: SQL Server Setup failure. SQL Server Setup has encountered the following error: Invoke or BeginInvoke cannot be called on a control until the window handle has been created.. BUTTONS: OK How can I resolve this? I am getting 2008 R2 CTP but this is just a CTP. My download is from DreamSpark. Thanks

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• Automated browsing with javascript?

  - by Paul Wicks

  I'm trying to do some browser automation, but I'm having some problems. Basically, what I'd like to do is load a set pages, set some forms options, click a button and view the results for each page that I open. Originally, I tried to do this by placing the pages I wanted to automate in iframes and then using javascript to drive the interactions I want in each, but that results in a Permissions Error, since the sites I want to automate are not on my server. Is there any way around this? The other possibility I've thought of is to use QT's webkit class and the evaluateJavaScript method to accomplish what I'd like to do, but this seems a bit more heavy weight for something that is, conceptually, pretty simple.

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• Catching "NullPointerExceptions" in JavaScript

  - by Lenni

  I'm writing quite a bit of code in Prototype.js which returns null if a DOM-id wasn't found. $("someId").show(); If someId doesn't exist, a method will be called on null, which halts the entire program, in effect disabling all JS effects after the error. I could just check for null before executing such a statement, but this is getting tiring. I would like to catch an exception but I'm not sure which one its is. MDC lists the following ECMA Script error types: * Error * EvalError * RangeError * ReferenceError * SyntaxError * TypeError * URIError * DOMException * EventException * RangeException Also, do browsers have a unified way of dealing with a method call on null?

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• How to put log in box in a website to ensure one user can vote once only?

  - by shah

  I have a school project to do which requires us to develop an online voting website. how do i ensure one user has voted once only? the website is supposed to be in booths in public places which means i cannot use ip addresses or cookies. i was planning to use fb login id or maybe some other email id but i cannot find relevant codes/links. i just want people to go through the procedure of entering the log in id but not go to fb directly. my website cannot be published online. could you please suggest how i can achieve this? it is a bit urgent, thank you!

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• Recreating iPhone stock application with nested views

  - by john

  I am trying to create an app similar to the Yahoo Stocks app that comes on the iPhone, with the split-screen interface (table on the top, graph on the bottom). I'm struggling with the view hierarchy. What is the easiest way to implement a split-screen type of application. I basically want two views nested in a parent view. My problem is a little bit more complex because I want functionality like having a uipagecontrol (does this require another viewcontroller, or is simply implemented in the initial view controller)? To what degree do I need to use IB? I would prefer to do this all in Xcode. Thanks in advance!

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• Why don't scripting languages output Unicode to the Windows console?

  - by hippietrail

  The Windows console has been Unicode aware for at least a decade and perhaps as far back as Windows NT. However for some reason the major cross-platform scripting languages including Perl and Python only ever output various 8-bit encodings, requiring much trouble to work around. Perl gives a "wide character in print" warning, Pythong gives a charmap error and quits. Why on earth after all these years do they not just simply call the Win32 -W APIs that output UTF-16 Unicode instead of forcing everything through the ANSI/codepage bottleneck? Is it just that cross-platform performance is low priority? Is it that the languages use UTF-8 internally and find it too much bother to output UTF-16? Or are the -W APIs inherently broken to such a degree that they can't be used as-is?

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• Potential problems porting to different architectures

  - by Brendan Long

  I'm writing a Linux program that currently compiles and works fine on x86 and x86_64, and now I'm wondering if there's anything special I'll need to do to make it work on other architectures. What I've heard is that for cross platform code I should: Don't assume anything about the size of a pointer, int or size_t Don't make assumptions about byte order (I don't do any bit shifting -- I assume gcc will optimize my power of two multiplication/division for me) Don't use assembly blocks (obvious) Make sure your libraries work (I'm using SQLite, libcurl and Boost, which all seem pretty cross-platform) Is there anything else I need to worry about? I'm not currently targeting any other architectures, but I expect to support ARM at some point, and I figure I might as well make it work on any architecture if I can. Also, regarding my second point about byte order, do I need to do anything special with text input? I read files with getline(), so it seems like that should be done automatically as well.

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• PHP can't connect to localhost XMPP server on port 5222

  - by Ben Werdmuller

  I've set up an ejabberd install locally on my Windows box, where I also have Apache, PHP and MySQL. I've also confirmed that it works great using Digsby, and have kicked the tires a bit by creating some users, sending some messages, etc. All good. However, PHP can't open a stream using stream_socket_client to port 5222. Even at its simplest level: stream_socket_client("tcp://localhost:5222", $errno, $errstr, 30, STREAM_CLIENT_CONNECT); Returns a timeout error. However, again, connecting with an IM client to localhost on port 5222 works fine. Any ideas? I'm stuck!

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• Poll database using jQuery/Ajax

  - by Gav

  Hi guys, I am trying to use jQuery (latest version) & ajax to poll a mysql db every x seconds, post.php does a simple search query on the table and limits to 1 row. (eg SELECT id FROM TABLE LIMIT 1) I've got some other jQuery UI (using v1.8) code that displays some modal/dialog boxes on the screen, simply put if post.php returns something from the db I need to initialise the dialog to pop up onto the screen. I've done all the popup stuff I am just having issues joining all these bits together - i've added some pseudo code of how i expect this to work. Thanks in advance var refreshId = setInterval(function(){ $.ajax({ type: "POST", url: "post.php", data: "", success: function(html){ $("#responsecontainer").html(html); } }); }, 2000 );s /* proposed pseudocode */ if (ajax is successful & returns a db row to #responsecontainer) { show jQueryUI modal (done this bit already fortunately) }

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• Best way to store weekly event in MySQL?

  - by mazin k.

  I have a table of weekly events that run on certain days of the week (e.g. MTWTh, MWF, etc.) and run on a certain time (e.g. 8am-5pm). What's the best way to store day of week information in MySQL to make retrieving and working with the data easiest? My CakePHP app is going to need to retrieve all events happening NOW(). For time of day, I would just use TIME. For days of the week, I had considered a 7-bit bitfield, a varchar ("MTWThFr" type deal) for the days of the week, but both of those seem like clunky solutions (the varchar being clunkier). Any suggestions?

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• OracleDataAdapter returns no rows, but the query string works in SQLDeveloper

  - by belzebu

  visual studion 2008 oracle db 11.1.0.7 oracle client for .NET I have a relatively simple query, that selects the rows from across multiple tables (up to 4) using joins. OracleDataAdapter returns no rows for the only dataset's table, but if I copy and paste that query in SQLDeveloper then I get the desired results. I can get the data from other tables using the adapter with no problem, but it seems like it struggles with the bit longer selection query (string length is ~ 300 (not that much at all)) Connection string for the connection is 100% correct. Any ideas? thank you...

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• Any good way to set the exit status of a Cocoa application?

  - by buglesareking

  I have a Cocoa app which interacts with a server and displays a GUI. If there is a fatal error, I display an alert and exit. I'd like to set the exit status to a non-zero value to reflect that an error occurred, for ease of interaction with some other UNIX based tools. Unfortunately I've been unable to find a good way to do so - NSApplication doesn't seem to have any way to set an exit status. At the moment, I've subclassed NSApplication and added an exitStatus ivar (which I set in my app delegate when necessary), then overridden -terminate: so that it calls exit(exitStatus). This works fine, but it seems a bit grungy to me, not to mention that I may be missing something important that the stadnard `terminate: is doing behind the scenes. I can't call [super terminate:sender] in my subclassed method, because that exit()s without giving me a chance to set the status. Am I missing something obvious?

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• Should we use a CSS frame work ? Are they worth it ?

  - by Gaurav M

  CSS frameworks have nice styles inbuilt and ask you to focuses on the grids but still there is a bit of dependency and lack of freedom it provide.. If I need to generate a webpage by looking on a PSD based mockup screen ..either i will use the classes provided by the framework but if that actual measurements does not exist I need to again specify my own rules that will add upto my CSS filesize and if performance is a constraint as always it is...you need not a big size file..though its in kb but every drop counts. Any comments and suggestions to use the framework in a best possible way.

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• IE7 is messing up the z-index property with my subnav (although I've already fixed that!)

  - by JAG2007

  OK, so I had this issue with my jQuery subnav in IE7 where it was scrolling down behind the main content after the header. Did a fair bit of research and found a great fix involving simply applying a z-index value to the header, and one to the main content. All was well. Or so I thought. Turns out IE7 is still messing up the subnav z-index within the header itself. The subnav still drops down behind the tagline, which is also part of the header. Particularly when you hit the subnav on the "Help Now" tab. (again, IE7 only) http://betawww.helpcurenow.org I've applied z-index values to both the subnav and the tagline, but that did not resolve the issue as did adding z-index values for the header and maincontent divs. Any tips? Did I specify my z-index improperly with the subnav? (should I have applied to the parent element?)

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• Does Java Mac OSX native look and feel respect UIManager font changes?

  - by Erik Lickerman

  I have a java applet and the only look and feel that works properly is the native mac one. I wanted to make the fonts a bit larger and tried using the standard UIManager methods UIManager.put("Label.font", new Font("Georgia", Font.PLAIN, 18)); This produces no change. It does not throw an exception, of course. Does anyone know if the native mac look and feel ignores these? I know there are specific ways to make controls different sizes on mac but these only seem to make them smaller. You cannot make the controls larger than regular.

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• Algorithm to emulate mouse movement as a human does?

  - by Eye of Hell

  Hello I need to test a software that treats some mouse movements as "gestures". For such a task I need to emulate mouse movement from point A to point B, not in straight line, but as a real mouse moves - with curves, a bit of jaggedyness etc. Is there any available solution (algorithm/code itself, not a library/exe) that I can use? Of course I can write some simple sinusoidal math by myself, but this would be a very crude emulation of a human hand leading a mouse. Perhaps such a task has been solved already numerous times, and I can just borrow an existing code? :)

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• API to determine whether running on iPhone or iPad

  - by Eric

  Is there an API for checking at runtime whether you are running on an iPhone or an iPad? One way I can think of would be to use: [[UIDevice currentDevice] model]; And detect the existence of the string @"iPad" - which seems a bit fragile. In the 3.2 SDK, I see that UIDevice also has a property which is really what I'm looking for, but doesn't work for pre-3.2 (obviously): [[UIDevice currentDevice] userInterfaceIdiom]; Are there other ways than checking for the existence of @"iPad" for a universal app?

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• preg_replace hell

  - by Jason

  I'm trying to use preg_replace to get some data from a remote page, but I'm having a bit of an issue when it comes to sorting out the pattern. function getData($Url){ $str = file_get_contents($Url); if(strlen($str)>0){ preg_match("/\<span class=\"SectionHeader\"\>title\</span>/<br/>/\<div class=\"header2\"\>(.*)\</div\></span\>/",$str,$title); return $title[1]; } } Here's the HTML as is before I ended up throwing a million slashes at it (looks like I forgot a part or two): <span class="cell CellFullWidth"><span class="SectionHeader">mytitle</span><br/><div class="Center">Event Name</div></span> Where Event Name is the data I want to return in my function. Thanks a lot guys, this is a pain in the ass.

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• How to call a specific, unknown Python object attribute?

  - by Michael Morisy

  I'm working to create a simple Python script that will ultimately tell you how many blog entries were posted in a given month, and the pyblog app is proving very helpful. However, when I create the blog object, I don't know how to access it's various attributes. I can print them all out by printing one item from the dictionary, as shown (in excerpts) below: print blog.get_recent_posts(1) 'post_status': 'publish', 'date_created_gmt': <DateTime '20100601T19:27:17' at 2853300>, 'mt_excerpt': '', 'userid': '288', 'dateCreated': <DateTime '20100601T14:27:17' at 2853350>, 'custom_fields': [{'value': '', 'id': '1317', 'key': 'brightcove_code'}, {'value': 'http://bit.ly/d0Rywl', 'id': '1403', But how can I just get it to provide that DateTime information?

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• Background positioning - CSS

  - by Kevin

  Please see attached screenshot The background is a bit off in both IE and chrome (although it was working before? hence the exact numbers??), although in ffox it looked allright.. Here is the code for what I thought was very straight forward... am I missing something? #wrapper{ width:100%; overflow:hidden; position:relative; background:url(../images/body-bg.jpg) no-repeat ; background-position: -20px top; } And an IE fix #wrapper{ background-position: -21px top; }

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• debugging android app to the phone

  - by tipu

  I've gone through this page: http://developer.android.com/guide/developing/device.html, My manifest has <application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true"> My phone has Menu - Settings - Applications - Development - USB Debugging checked I have gone to the control panel on my Windows XP 64 bit and installed the USB drivers given to me by the SDK installer at: android-sdk_r05-windows\android-sdk-windows\usb_driver So my computer does recognize the android device. However.. when I run an app on Eclipse, it still insists on opening it up in an emulator rather than my phone. How can I fix that?

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• How to make django test framework read from live database?

  - by lfborjas

  I realize there's a similar question here, but this one has a different approach: I have a django app that does queries over data indexed with djapian ; I'd like to write unit tests for this app's search component, and, obviously, I'd need the django settings module and all connections with the database active, so the test runner that django provides seems ideal. however, the django testing framework creates a dummy database and I'd hate to dump all my data to a fixture and then index it (the tests would take forever!); My data isn't at risk because the tests would only read from the database, so, how could this be achieved? -I'm new at this whole unit testing thing, so the solution of writing a new test runner I read in that similar question doesn't enlighten me a bit, at least not without some details

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• WF4RC, How to: Activity to Xaml?

  - by johnny g

  Hello all, I have Googled a bit, and cannot seem to find any examples of Xaml-fying Activities - good, bad, or otherwise! public static string ToXaml (this Activity activity) { // i would use ActivityXamlServices to go from Xaml // to activity, but how to go other way? documentation // is slim, and cannot infer proper usage of // ActivityXamlServices from Xml remarks :S string xaml = string.Empty; return xaml; } Hints, tips, pointers would be welcome :) NOTE: so found this. Will work through and update once working. Anyone wanna beat me to the punch, by all means. Better yet, if you can find a way to be rid of WorkflowDesigner, seems odd it is required.

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• What are the ways to create draw data structures for latex?

  - by alicephacker

  I tried tikz/pgf a bit but have not had much luck creating a nice diagram to visualize bitfields or byte fields of packed data structures (i.e. in memory). Essentially I want a set of rectangles representing ranges of bits with labels inside, and offsets along the top. There should be multiple rows for each word of the data structure. This is similar to most of the diagrams in most processor manuals labeling opcode encoding etc. Has anyone else tried to do this using latex or is there a package for this?

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• How to get the "#" symbol in the :id into the redirect_to method in Rails

  - by Matthias Günther

  Hello, this is a silly questions but I don't understand, why rails isn't evaluating my string as expected. Here is my problem: I want to redirect to an url in the form ~/:controller/index/#_76 redirect_to :action => "index", :id => '#_76' But I'm getting the url in the form: ~/:controller/index/%25_76 and so my anchor for linking to a certain place in the website isn't working. Can someone please explain me, why rails makes this rendering? I think this hase something to do with url encoding. Again thanks for your help, I'm learning every day a little bit more about rails :).

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