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• SQL server virtual memory usage and performance

  - by user365035

  Hello, I have a very large DB used mostly for analytics. The performance overall is very sluggish. I just noticed that when running the query below, the amount of virtual memory used greatly exceeds the amount of physical memory available. Currently, physical memory is 10GB (10238k bytes) whereas the virtual memory returns significantly more - 8388607k bytes. That seems really wrong, but I'm at a bit of a loss on how to proceed. USE [master]; GO select cpu_count , hyperthread_ratio , physical_memory_in_bytes / 1048576 as 'mem_MB' , virtual_memory_in_bytes / 1048576 as 'virtual_mem_MB' , max_workers_count , os_error_mode , os_priority_class from sys.dm_os_sys_info

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• Enum.values() vs EnumSet.allOf( ). Which one is more preferable?

  - by Alexander Pogrebnyak

  I looked under the hood for EnumSet.allOf and it looks very efficient, especially for enums with less than 64 values. Basically all sets share the single array of all possible enum values and the only other piece of information is a bitmask which in case of allOf is set in one swoop. On the other hand Enum.values() seems to be a bit of black magic. Moreover it returns an array, not a collection, so in many cases it must be decorated with Arrays.asList( ) to be usable in any place that expects collection. So, should EnumSet.allOf be more preferable to Enum.values? More specifically, which form of for iterator should be used: for ( final MyEnum val: MyEnum.values( ) ); or for ( final MyEnum val: EnumSet.allOf( MyEnum.values ) );

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• Most clever way to parse a Facebook OAuth 2 access token string

  - by RyOnLife

  It's a bit late, but I'm disappointed in myself for not coming up with something more elegant. Anyone have a better way to do this... When you pass an OAuth code to Facebook, it response with a query string containing access_token and expires values. access_token=121843224510409|2.V_ei_d_rbJt5iS9Jfjk8_A__.3600.1273741200-569255561|TxQrqFKhiXm40VXVE1OBUtZc3Ks.&expires=4554 Although if you request permission for offline access, there's no expires and the string looks like this: access_token=121843224510409|2.V_ei_d_rbJt5iS9Jfjk8_A__.3600.1273741200-569255561|TxQrqFKhiXm40VXVE1OBUtZc3Ks. I attempted to write a regex that would suffice for either condition. No dice. So I ended up with some really ugly Ruby: s = s.split("=") @oauth = {} if s.length == 3 @oauth[:access_token] = s[1][0, s[1].length - 8] @oauth[:expires] = s[2] else @oauth[:access_token] = s[1] end I know there must be a better way!

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• DateTime Property not firing PropertyChanged event when changed

  - by Brent

  I'm working on a WPF MVVM application and I've got a TextBox on my view that is bound to a DateTime property on the ViewModel. Seems simple enough, but when I clear the text in the TextBox, the property never changes. In fact, it never even fires until I begin typing "4/1..." and then it fires. What can I do to fix this? Obviously I could bind the TextBox to a string property and then update the real property in the setter, but that's a bit of a hack. There's got to be a better way... ViewModel private DateTime _startDate; public DateTime StartDate { get { return _startDate; } set { _startDate = value; OnPropertyChanged("StartDate"); } } View <TextBox Text="{Binding Path=StartDate, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=true}"/>

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• Automating scraping of table data to XML

  - by thewinchester

  Problem I have a YQL query result that I'm trying to get converted and sort into a clean XML file. Background Being the pains that they are, information from the World Cup isn't freely available in an easy to reuse format. So, after a bit of finessing with YQL I have managed to liberate the required table rows which contain the data I'm after. The YQL query can be viewed at: http://query.yahooapis.com/v1/public/yql/ravingbeefsteak/worldcup2010groupliberator?diagnostics=true I'd like to now convert this information into XML, and being an absolute n00b I don't know where to start or what to look for. I'm also needing to do a find and replace on the data to get the URL's working as they should without manual changes, and hopefully an initial sorting of the data. If anyone can point me in the right direction of what I need to be doing to make my needs a reality it would be greatly appreciated.

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• Why would someone use ob_start in this manner and what is the point?

  - by meder

  Something is failing in the class I copied over. It's not my class, but the relevant bit that fails is: class foo { function process() { ob_start( array( &$this, 'parseTemplate' ) ); } function parseTemplate(){} } Does anyone know what the ob_start expression is supposed to do? Call the parse_template method in the context of a copy of &$this? PHP Version is 5.3.2-1. I suspect that the class was coded for 5.0-5.2 and it breaks in 5.3? or could it be something else?

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• XmlDocument from LINQ to XML query

  - by Ben

  I am loading an XML document into an XDocument object, doing a query and then returning the data through a web service as an XmlDocument object. The code below works fine, but it just seems a bit smelly. Is there a cleaner way to take the results of the query and convert back to an XDocument or XmlDocument? XDocument xd = XDocument.Load(Server.MapPath(accountsXml)); var accounts = from x in xd.Descendants("AccountsData") where userAccounts.Contains(x.Element("ACCOUNT_REFERENCE").Value) select x; XDocument xd2 = new XDocument( new XDeclaration("1.0", "UTF-8", "yes"), new XElement("Accounts") ); foreach (var account in accounts) xd2.Element("Accounts").Add(account); return xd2.ToXmlDocument();

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• Column locking in innodb?

  - by ming yeow

  I know this sounds weird, but apparently one of my columns is locked. select * from table where type_id = 1 and updated_at < '2010-03-14' limit 1; select * from table where type_id = 3 and updated_at < '2010-03-14' limit 10; the first one would not finish running even in a few hours, while the second one completes smoothly. the only difference is the type_id between the 2 queries. a bit of background, the first statement screwed up before which i had to kill manually. Thanks in advance for your help - i have an urgent data job to finish, and this problem is driving me crazy

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• windows mobile 6.5 Gestures and DirectDraw

  - by ArjanW

  I'm trying to build a UI using directdraw in c#. For this im using a DirectDrawWrapper as sugested here. My initial tests setting up the screen work perfectly. But now i'd like to incorporate gesture recognition into the UI. So i instantiate a GestureRecognizer and tie it to the _form which also gets passed to the DirectDrawGraphics constructor, form = new Form(); _form.show(); _graphics = new DirectDrawGraphics(_form, CooperativeFlags.Fullscreen, BackbufferMode.Any); gestureRecognizer = new GestureRecognizer(); gestureRecognizer.TargetControl = _form; Pasting the whole DirectDrawWrapper code might be a bit to much, so let me try to formulate a question. I guess directdraw talks directly to the video memory, as it should. But then my form wont receive any messages, thus any eventhandlers i'v tied op to the GestureRecognizer wont be fired. How can i still receive any messages from the touchscreen?

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• C#: How to change the region containing MDI children?

  - by Erlend D.

  When creating a MDI parent, the entire "inside" of the form is made the MDI region. If you add a menustrip to the MDI parent, the MDI region is scaled down a bit to make room for the menustrip. But if you add a panel to the top of the MDI parent, the entire inside is still the MDI region. Which means that you can move MDI children up behind the panel, and hide their title line. If you move MDI children behind a menustrip, scrollbars appear, and you can scroll higher up to access the title line. But the scrollbars doesn't appear when you are using a panel instead of a menustrip. Because the MDI region doesn't know about the panel, I suppose. How can I scale the MDI region to start below a given Y value?

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• Which are the Extreme Programming "core" practices?

  - by MiKo

  Recently, I began reading about agile methodologies and XP in particular. I am a bit confused, though, about what are considered the practices involved in extreme programming. More precisely: Wikipedia reports 12 practices, which I someway believe to be the "classic" ones. Both Kent Beck and Ron Jeffries indicate 13 practices (you can find the links at the bottom of wikipedia page about "Extreme Programming Practices", I cannot post them here since I am new user of Stack Overflow), while this review of Kent Beck's "XP explained" (2nd edition) report more than 20 somewhat different practices. As a complete beginner in the topic (and basically as a complete beginner as a programmer), I would like to be enlightened on the matter. My impression is that I should look at Beck's book, since the second edition has been written after several years of XPerience, but I can find a lot less material based on that.

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• jquery input-validation (number characters and decimal places).

  - by Cesar Lopez

  I have several javascript functions to validate the input data in textbox, so it will limit the user to type into the textbox a range of numbers (eg. from 0 to 500) an x amount of decimals (eg. 1 or 2 or 3 ....). I am having some issues with the javascript functions because they are three separate functions and the alerts get a bit mixed up. I was wondering if there is a jquery function that will make it neat, effective and simple. Thanks.

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• C# - Layout problem on Windows XP professional

  - by Rakib Hasan

  I am developing a C# application with .NET Framework 2.0. The problem is, that on my client's PC, the controls get expanded, layout changes (positions of the controls gets changed), sometimes buttons get missed entirely. It happens even on Forms with 2-3 TextBoxes, 2-3 Buttons and some Labels. I tried a lot of investigations. I tried to show a message in the form's resize event. But it doesn't get called. After digging a bit more, it seemed that in Designer.cs file even though ResumeLayout (false) is being called for the form, but this causes the the expansion/disposition of the controls. My Client is using Windows XP professional on his Dell laptop. He is able to reproduce the issue on other laptops with Windows XP professional. But not in other OSes (like Windows XP Home or Windows Vista). In my desktop with Windows XP professional, it is not reproducible. How can this issue be resolved?

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• svn branch commit - experimental commit

  - by quano

  I've made some experimental code that I would like to save in the repository, but I don't want it on the main branch. How would you commit this to a branch? Maybe I got this wrong, but of what I've understood about branching, all you actually do is copying already checked in code to another directory in the repository. I suppose one could copy the main branch to another location, and then change the working copy repository location pointer to point at that location, and then commit the experimental code. But that seems a bit long-winded. Is this really how you do it?

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• Delphi Unicode String Type Stored Directly at its Address

  - by Andreas Rejbrand

  I want a string type that is Unicode and that stores the string directly at the adress of the variable, as is the case of the (Ansi-only) ShortString type. I mean, if I declare a S: ShortString and let S := 'My String', then, at @S, I will find the length of the string (as one byte, so the string cannot contain more than 255 characters) followed by the ANSI-encoded string itself. What I would like is a Unicode variant of this. That is, I want a string type such that, at @S, I will find a unsigned 32-bit integer containing the length of the string in bytes (or in characters, which is half the number of bytes) followed by the Unicode representation of the string. I have tried WideString, UnicodeString, and RawByteString, but they all appear only to store an adress at @S, and the actual string somewhere else (I guess this has do do with reference counting and such). I suspect that there is no built-in type to use, and that I have to come up with my own way of storing text the way I want (which actually is fun). Am I right?

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• Why does xdebug crash apache on every XAMPP install I've tried?

  - by Ian Cook

  I've installed the Windows XAMPP package on three separate computers, 2 running Windows Vista 32 bit ( 1 Ultimate / 1 Home Premium ) and 1 running Windows Vista 64 Home Premium. After enabling xdebug in php.ini and restarting apache, viewing the default XAMPP localhost index causes apache to crash in the same way every time, reporting 'php_xdebug.dll' as the Fault Module Name. Here's the full report from the Windows Crash Reporter thing: Problem signature: Problem Event Name: APPCRASH Application Name: apache.exe Application Version: 2.2.9.0 Application Timestamp: 4853f994 Fault Module Name: php_xdebug.dll Fault Module Version: 2.0.3.0 Fault Module Timestamp: 47fcd9b9 Exception Code: c0000005 Exception Offset: 00008493 OS Version: 6.0.6001.2.1.0.768.3 Locale ID: 1033 Additional Information 1: a34a Additional Information 2: c9c5f4fd744690d388ab9d5b3eb051a7 Additional Information 3: cb2e Additional Information 4: 650bb5690556a17e911375b94d3e16f0 I've tried Googling this issue but haven't found any resolution, only reports of similar errors. EDIT: I enabled the extension line for php_xdebug.dll and that seems to have stopped the crashing so far.

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• Android SDK and AVD manager will not run from Eclipse after upgrade to SDK 5 and ADT 0.9.6

  - by user303944

  Using Windows 7, 64 bit system. Prior to upgrade I was able to run "Android SDK and AVD manager" from Eclipse via a tool bar icon and menu option, both of which still exist. However now nothing happens when I try to run the manager. As a result I can't start an emulator from within Eclipse. When I use Eclipse to run an Android app, the first emulator I installed is automatically started. Using Windows Explorer, I can still run the manager from the SDK directory in which the update was applied (the update didn't change the location of the SDK). If I run the manager and start multiple emulators and then Run an app from Eclipse, it sees the emulators and allows me to choose one as before. This is a satisfactory work-around, but it would be nice if the manager were fully integrated into Eclipse as it was before.

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• how to sort a multidemensional array by an inner key

  - by Derek Vance

  i have this enormous array that i am pulling from an API for BattleField Bad Company 2, and the soldier stats can be pulled as a multi dimensional array with an inner array for each soldier, however the API sormats it sorting the soldiers by name alphabetically, i want to sort them by rank (which is just another key within that soldiers array). ive been trying to figure this out for days, anyone have any ideas? (ie sort the array by $arr[players][][rank] here is a bit of the array Array ( [players] = Array ( [0] = Array ( [name] = bigjay517 [rank] = 29 [rank_name] = SECOND LIEUTENANT II [veteran] = 0 [score] = 979440 [level] = 169 [kills] = 4134 [deaths] = 3813 [time] = 292457.42 [elo] = 319.297 [form] = 1 [date_lastupdate] = 2010-03-30T14:06:20+02:00 [count_updates] = 13 [general] = Array ( [accuracy] = 0.332 [dogr] = 86 [dogt] = 166 [elo0] = 309.104 [elo1] = 230.849 [games] = 384 [goldedition] = 0 [losses] = 161 [sc_assault] = 146333 [sc_award] = 567190 [sc_bonus] = 35305 [sc_demo] = 96961 [sc_general] = 264700 [sc_objective] = 54740 [sc_recon] = 54202 [sc_squad] = 53210 [sc_support] = 70194 [sc_team] = 21215 [sc_vehicle] = 44560 [slevel] = 0 [spm] = 0 [spm0] = 0 [spm1] = 0 [srank] = 0 [sveteran] = 0 [teamkills] = 67 [udogt] = 0 [wins] = 223 )

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• What does msvc 6 throw when an integer divide by zero occurs?

  - by EvilTeach

  I have been doing a bit of experimenting, and have discovered that an exception is being thrown, when an integer divide by zero occurs. #include <iostream> #include <stdexcept> using namespace std; int main ( void ) { try { int x = 3; int y = 0; int z = x / y; cout << "Didn't throw or signal" << endl; } catch (std::exception &e) { cout << "Caught exception " << e.what() << endl; } return 0; } Clearly it is not throwing a std::exception. What else might it be throwing?

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• How can I enjoy or avoid designing every web application I make ?

  - by schmrz

  I know this sounds silly, but I'm having huge problems (ok, not that huge, but still...) problems when I get an idea for a web project, small or big. The instant turn off is when I remember that I have to code the html/css by hand again and again. I like programming a lot more that designing web sites, and I simply don't enjoy designing them as much as I enjoy programming them. With that said, I also prefer simple and minimalistic designs. What is your approach in web design, how do you make it enjoyable (at least a little bit)?

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• Hello World bootloader not working!

  - by Newbie

  Hello. I've been working through the tutorials on this webpage which progressively creates a bootloader that displays Hello World. The 2nd tutorial (where we attempt to get an "A" to be output) works perfectly, and yet the 1st tutorial doesn't work for me at all! (The BIOS completely ignores the floppy disk and boots straight into Windows). This is less of an issue, although any explanations would be appreciated. The real problem is that I can't get the 3rd tutorial to work. Instead on outputting "Hello World", I get an unusual character (and blinking cursor) in the bottom-left corner of the screen. It looks a bit like a smiley face inside a rounded rectangle. Does anyone know how to get Hello World to display as it should?

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• Client side page permissions - Javascript / jquery / cookies / other?

  - by Ozaki

  TLDR Using plain HTML / Javascript. Want to block access to some pages (doesn't have to be super secure just to stop some peeking eyes). I thought of simply doing this by setting a cookie for each page they are allowed to visit with a value of true but thats a bit messy. Although it would work. Is there a way to set an array of values to a cookie so I can read the cookie and if a name of a page is in there then allow access with an IF statement or so on each of my pages. If they dont have the cookie just to replace my #content (entirepage) to "sorry no" etc. For example: $.cookie("Access","page1, page2, page3",{ expires: 1 }); Am already using JQuery, Jquery cookie. etc. I am up for anyway of doing this cookie idea is just an example So what do you think would be the best / most efficient way of managing this?

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• Interview questions for junior C and C++ developer position

  - by Ondrej Slinták

  What interview questions should people expect as a junior C and C++ developer? Code questions or more of theory? Solutions in pseudo-code or in C code? Maybe I'm misinterpreting the word "junior", but I have no idea what would anyone ask me if I have no C work experiences. I'm bit afraid of tricky questions with pointers, so I'd like to be sure what should I look up before actually going there. I'm a junior PHP developer with 1 year of experiences, if it helps the question. Hope it isn't duplicate as I'm asking particularly about junior developer job.

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• Working with bytes and binary data in Python

  - by ignoramus

  Four consecutive bytes in a byte string together specify some value. However, only 7 bits in each byte are used; the most significant bit is ignored (that makes 28 bits altogether). So... b"\x00\x00\x02\x01" would be 000 0000 000 0000 000 0010 000 0001. Or, for the sake of legibility, 10 000 0001. That's the value the four bytes represent. But I want a decimal, so I do this: >>> 0b100000001 257 I can work all that out myself, but how would I incorporate it into a program?

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• Can somebody explain this Objective C method declaration syntax

  - by Doug R

  I'm working through an iPhone development book* without really knowing Objective C. For the most part I'm able to follow what's going on, but there are a few method declarations like the one below that I'm having a bit of trouble parsing. For example: - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger) section { return [self.controllers count]; //controllers is an instance variable of type NSArray in this class } It looks this is a method called numberOfRowsInSection, and it returns an NSInteger, and takes an NSInteger as a parameter which is locally called 'section'. But I don't understand all the references to tableView, or why this takes a parameter when it is not used within the method. Can somebody clarify this? Thanks. *p. 258, Beginning iPhone 3 Development, by Mark and LaMarche, published by Apress

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