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• How to avoid fast rate page refresh in ASP.NET ?

  - by eugeneK

  I have a page that shows statistics for users, this cannot be cached because each user has different statistics and there are many thus the real time query must be made. What the way to avoid database server overload when user will click F5's to refresh or to ask different queries in short time intervals ?

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• Django - Can you use property as the field in an aggregation function?

  - by orokusaki

  I know the short answer because I tried it. Is there any way to accomplish this though (even if only on account of a hack)? class Ticket(models.Model): account = modelfields.AccountField() uuid = models.CharField(max_length=36, unique=True) created = models.DateTimeField(auto_now_add=True) class Meta: ordering = ['created'] @property def repair_cost(self): # cost is a @property of LineItem(models.Model) return self.lineitem_set.aggregate(models.Sum('cost'))

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• How to test input value for null or zero with jQuery

  - by Matt

  I need to keep the focus on the text input when the user moves to the next input without putting something in the previous one. In short, if it is null (left blank) or not valid, how do I keep the focus on that input until the conditions are satisfied?

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• How do I return the first string variable that isn't null or emtpy

  - by RandomBen

  If I have 5 String variables and between 0 and 5 of them are null or empty is there an easy/short way of returning the first one that is not null or empty? I am using .NET 3.5

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• Big, Thick Reference Books (PHP / MySQL / Unix) [closed]

  - by Josh K

  I'm looking for in-depth reference books / guides in PHP, MySQL, and Unix. I'm aware there other other questions pertaining to good books for short references of function names, or detailed beginner guides to these systems. I'm looking for something different. I want a book that I can either use as a quick but in-depth (decent write up, not a pocket reference guide) reference to common functions (JOINS, string manipulation, Regular Expressions, etc) while also providing a detailed inner workings explanation on the system itself.

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• How to convert DateTime to shortdatetime in C#??

  - by Abhishek Rao

  I have a column in my datatable which is of DateTime Type. I only want the DatePart, hence when I use the ToShortDateTimeString it converts to short date but of string type. Hence when i reassign the string to the column of the datatable it again appends 12:00:00 to it. I cannot change the column type in my datatable. Is there any way to convert DateTime to ShortDateTime directly without converting to string?????

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• WCF - In streaming endpoints, do all operation contracts require a stream as a return or parameter f

  - by Tri Q

  Hi all, I wondering if in the same endpoint, which has been set to streamed transport mode, is it required to have all operation contracts in this service to have a stream in the parameter or as the return type for this service to work? In short: Can streamed enabled endpoint contain operation contracts that do not have stream as a parameter or as a return type?

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• Implementing a virtual file system in .NET

  - by Charlie Somerville

  A while back a found a great-looking framework that allowed .net developers to implement a virtual file system. I thought I had bookmarked it, but it seems I haven't. Does anyone know any frameworks for doing this? EDIT: Here's a hint... It had a catchy, short name and it's own domain. Sorry, that's all I can remember :p

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• How can I stop cURL from outputting the contents of the page it loads into the browser?

  - by Rob

  I currently use curl_multi_* to connect to a few sites. Its only sending a few $_GET variables to start a script, but it outputs the html from the sites to the browser. I want to stop this. I already use a short timeout, but sometimes the scripts start fast, and I don't want to set the timeout any lower, in case it causes it not to connect. So how can I stop the output to the browser from cURL?

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• Is sizeof function depends on compiler time or runtime in C++?

  - by ogzylz

  For example result of this code snippet depends on which machine: the compiler machine or the machine executable file works? sizeof(short int) Thanks.

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• Mass update of data in sql from int to varchar

  - by Christopher Kelly

  we have a large table (5608782 rows and growing) that has 3 columns Zip1,Zip2, distance all columns are currently int, we would like to convert this table to use varchars for international usage but need to do a mass import into the new table convert zip < 5 digits to 0 padded varchars 123 becomes 00123 etc. is there a way to do this short of looping over each row and doing the translation programmaticly?

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• Localization of accesskeys in internet explorer

  - by VikrantY

  We have an enterprise web application that we are converting from english to Thai. One area that has got us stumped is on the issue of "access keys". We use the "Accesskey" attribute in IE to provide short cuts to our buttons. However, how do we do this in Thai? Does HTML and IE support unicode access keys and if so how? Our application is IE specific, so any specific technology that IE uses is welcome.

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• Detecting and handling third-party library filehandle leaks in Java

  - by tucuxi

  Is there any way to detect and handle whether a Java library is correctly releasing file-handles (via "close") from within a Java program that is using said library, short of having access to the actual library code and inserting the corresponding "finally close" statements? If detection is feasible, is there any way to close those file-handles without a reference to the Reader (or FileInputStream) that was reading the file?

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• Generic JSON parser in .NET / WPF?

  - by niklassaers

  I've read lots of tutorials on how to deserialize a JSON object to an object of a particular using DataContractJsonSerializer. However, I'd like to deserialize my object to a Dictionary consisting of either Strings, Arrays or Dictionaries, such as System.Json does with SilverLight when I say JsonObject.Parse(myJSONstring). Is there an equivalent to System.Json that I can use in my WPF project? (just a short background: I'm fetching JSON objects that have way to much info, and I just want to use a little bit to fill out a String array) Cheers Nik

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• Copying a byte buffer with JNI

  - by Daniel

  I've found plenty of tutorials / questions on Stackoverflow that deal with copying char arrays from C/JNI side into something like a byte[] in Java, but not the other way around. I am using a native C library which expects a byte array. I simply want to get data from a byte[] in java, into preferably an unsigned char[] in C. Long story short: What is the best way of copying data from a jBytearray in JNI? Is there any way to detect it's size?

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• MVVM, Animations, Binding - I need a quick question answered.

  - by Peanut

  http://stackoverflow.com/questions/2455963/wpf-mvvm-dynamic-animation-using-storyboards There is a question i have found that relates directly to the issue I am having. The answer provided in that thread is a bit short, however. I did a little looking on google for 'attached properties' and i still remain a bit confused. Could someone shed a little light regarding this question? Perhaps provide a little sample code for the link stated above? Thanks in advance

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• How do you set the default source for the Output window in Visual Studio?

  - by Grank

  We added a SharePoint BDC model project to a solution in Visual Studio 2010. Ever since, whenever the solution is built, instead of showing the Build output in the Output window, it insists on having "SharePoint Tools" selected in the "Show Output from:" drop-down, just to say "Model validation started ... Model validation completed with no errors." Short of shutting off any SharePoint projects in the build configuration, can this behavior be overridden?

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• Ways to calculate similarity

  - by MarySheen

  Hi I am doing a community website that requires me to calculate the similarity between any two users. each user is described with the following attributes: age, skin type (oily, dry), hair type (long, short, medium), lifestyle (active outdoor lover, TV junky) and others. Can anyone tell me how to go about this problem or point me to some resources. Thanks Mary

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• Shopping Cart Suggestions Needed

  - by Maen

  I am building a small web app for a pharmacy to keep track of sales and stocks, so in short, in one page, the pharmacist will enter a bar-code and the item is displayed, pharmacist enters quantity (price will be automatically calculated) then next item and next and so on, I haven't worked with such a problem before so I would appreciate any advices/tips on how to do it, what to use and wither its already done in some tidy neat way I can just import into my page. Am using ASP.net and VB.net, SQL 2008 and all express withing Visual Web Developer (also ExpresS)

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• Does it make sense to have several UDP ports ready? Will packets be dropped?

  - by Gubatron

  I'm coding a networking application on Android. I'm thinking of having a single UDP port and Datagram socket that receives all the datagrams that are sent to it and then have different processing queues for these messages. I'm doubting if I should have a second or third UDP socket on standby. Some messages will be very short (100bytes or so), but others will have to transfer files. My concern is, will the Android kernel drop the small messages if it's too busy handling the bigger ones?

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• More efficient left join of big table

  - by Zeus

  Hello, I have the following (simplified) query select P.peopleID, P.peopleName, ED.DataNumber from peopleTable P left outer join ( select PE.peopleID, PE.DataNumber from formElements FE inner join peopleExtra PE on PE.ElementID = FE.FormElementID where FE.FormComponentID = 42 ) ED on ED.peopleID = P.peopleID Without the sub-query this procedure takes ~7 seconds, but with it, it takes about 3minutes. Given that table peopleExtra is rather large, is there a more efficient way to do that join (short of restructuring the DB) ?

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• How do I compare two complex data structures?

  - by Phil H

  I have some nested datastructures, each something like: [ ('foo', [ {'a':1, 'b':2}, {'a':3.3, 'b':7} ]), ('bar', [ {'a':4, 'd':'efg', 'e':False} ]) ] I need to compare these structures, to see if there are any differences. Short of writing a function to explicitly walk the structure, is there an existing library or method of doing this kind of recursive comparison?

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• Any receiver for sent SMS messages?

  - by dhaiwat

  Hi we get an event when new sms come in android but can we get any event when user send a messages, in short is there any receiver to track sending sms as we track incoming sms.

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• Free GUI-like web design tool for Java?

  - by Peter C.

  Our company needs to build web solution and we're somewhat short on time. We use Java and do not have a design yet. We're looking for some tools/plugins for: GUI-like web design (drag and drop components) WYSIWYG The tools must be *free We like GWT but any other UI framework is fine. Plugins for NetBeans or Eclipse would be great. Any ideas?

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• Recommendations for Open Source Parallel programming IDE

  - by Andrew Bolster

  What are the best IDE's / IDE plugins / Tools, etc for programming with CUDA / MPI etc? I've been working in these frameworks for a short while but feel like the IDE could be doing more heavy lifting in terms of scaling and job processing interactions. (I usually use Eclipse or Netbeans, and usually in C/C++ with occasional Java, and its a vague question but I can't think of any more specific way to put it)

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