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• How is dynamic memory allocation handled when extreme reliability is required?

  - by sharptooth

  Looks like dynamic memory allocation without garbage collection is a way to disaster. Dangling pointers there, memory leaks here. Very easy to plant an error that is sometimes hard to find and that has severe consequences. How are these problems addressed when mission-critical programs are written? I mean if I write a program that controls a spaceship like Voyager 1 that has to run for years and leave a smallest leak that leak can accumulate and halt the program sooner or later and when that happens it translates into epic fail. How is dynamic memory allocation handled when a program needs to be extremely reliable?

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• Can a ScatterViewItem dynamically resize to fit its content?

  - by Brett

  We're hosting a control inside of a ScatterViewItem that dynamically changes its size at runtime as a result of having various sub-elements added, removed, and/or collapsed. We would like to have the hosting ScatterViewItem resize as well to properly fit its child controls, but we're having a hard time making this happen. We've tried a number of different things and the closest we've come is hooking into the child control's SizeChanged event and explicitly setting the ScatterViewItem's Width and Height, but this approach still has issues. When you define a ScatterViewItem and its content in XAML, the ScatterViewItem is sized appropriately. We would like to force the same behavior at runtime when its content changes size. Any help would be greatly appreciated. Thanks!

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• transform List<XElement> to List<XElement.Value>

  - by Miau

  I have a result of a xlinq that is an enumerable with id and phones, I want to transform that to a Dictionary, that part is simple, however the part of transforming the phone numbers from a XElement to a string its proving hard xLinqQuery.ToDictionary(e => e.id, e => e.phones.ToList()); will return Dictionary<int, List<XElement>> what i want is a Dictionary<int, List<String>> I tried with e.phones.ToList().ForEach(...) some strange SelectMany, etc ot no avail Thanks

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• Themes for jQTouch

  - by Leticia Meyer

  I've been using jQTouch to make an iphone-like website. But, I don't want it to look like a native iPhone app (Since people will be using it on other phones), but I don't really like the included JQT theme. Anyone know any other themes? I've searched long and hard, but can't find any. If worst comes to worse, I guess I could always make my own, but I'm not too good at graphics. Just wondering if anybody knows about any others, including those in demos? Thanks in advance! -Leticia Meyer

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• What learning habits can you suggest?

  - by Asaf R

  Hi, Our profession often requires deep learning; sitting down and reading, and understanding. I'm currently undergoing an exam period, and I'm looking for ways to learn more effectively. I'm not asking about what to learn, or whether to prefer blogs over books, etc. My question is much more physical than that - What do you do when need to study, and I mean study hard? I'm looking for answers such as I slice my time to 2.5 hours intervals and make a break between them, but never during. I keep a jar of water nearby. I wake up at 6 o'clock sharp and start my day with a session at the gym. What good learning habits did acquire, or wish you had acquired? (I know this isn't strictly programming related, but it is programmers related)

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• Actionscript 3 introspection -- function names

  - by Markus O'reilly

  I am trying to iterate through each of the members of an object. For each member, I check to see if it is a function or not. If it is a function, I want to get the name of it and perform some logic based on the name of the function. I don't know if this is even possible though. Is it? Any tips? example: var mems: Object = getMemberNames(obj, true); for each(mem: Object in members) { if(!(mem is Function)) continue; var func: Function = Function(mem); //I want something like this: if(func.getName().startsWith("xxxx")) { func.call(...); } } I'm having a hard time finding much on doing this. Thanks for the help.

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• Make VS 2008 Auto Deploy SQL Server CE 3.5 When Debugging on Windows Mobile 5.0 Device

  - by INTPnerd

  How do you make VS 2008 automatically install SQL Server CE 3.5 when debugging (F5) a CF app on a windows Mobile 5.0 device? VS used to do this automatically, but now it stopped and I don't know why. I have changed the structure of my solution and the projects, but it is still using SQL Server CE 3.5. It used to also install the Query Analyzer as well which was useful. I frequently uninstall all the programs on the device or do hard reboots so installing this manually is what I am trying to avoid.

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• Boost interprocess cached pools

  - by porgarmingduod

  I'm trying to figure out if my reading of the docs for boost interprocess allocators is correct. When using cached_adaptive_pool to allocate memory: typedef cached_adaptive_pool<int, managed_shared_memory::segment_manager> pool_allocator_t; pool_allocator_t pool_allocator(segment.get_segment_manager()); // Allocate an integer in the shared memory segment pool_allocator_t::pointer pool_allocator.allocate_one(); My understanding is that with multiple processes one can allocate and deallocate freely: That is, if I have a cached pool allocator for integers in one process, then it can deallocate integers allocated by similar pools in other processes (provided, of course, that they are working on the same shared memory segment). It may be a stupid question, but working with multiple processes and shared memory is hard enough, so I'd like to know 100% whether I got the basics right.

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• create manually parameter ReturnUrl

  - by user276640

  i have view like 'home/details/5', it can be access by anonymous user. but there is button, which can be pressed only by registered users. no problem, i can look into Request.IsAuthenticated , and if anonymous i show button login instead of secret button but the problem- when press login i can lose address and parameters of page. how can i create login button and pass a parameter ReturnUrl ? something like <%= Html.ActionLink("enter to buy", "LogOn", "Account", new { ReturnUrl = path to view with route value })%> i see only stupid solution <%= Html.ActionLink("enter to buy", "LogOn", "Account", new { ReturnUrl = "home/details/" + ViewContext.RouteData.Values["id"] })%> but i don't like to hard code names of controller

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• How to get all rows but specifc columns from a DataTable?

  - by Oliver

  Currently i am having some problems with getting some data out of a DataTable by selecting all rows, but only some columns. To be a little more descriptive here is a little example: Sample Data | ID | FirstName | LastName | Age | +----+-----------+----------+-----+ | 1 | Alice | Wannabe | 22 | | 2 | Bob | Consumer | 27 | | 3 | Carol | Detector | 25 | What i have So what we got from our GUI is a IEnumerable<DataColumn> selectedColumns and there we'll find two elements (FirstName and LastName). Now i need some result which contains all rows, but only the above two columns (or any other list of selected columns). So far i already used LINQ on several one dimensional objects, but this two dimensional object gives me a little headache. // The hard-coded way Table.AsEnumerable().Select(row => new { FirstName = row[1], LastName = row[2] }); // The flexible way Table.AsEnumerable().Select(row => row ???) But how can i now say, which columns from row should be selected by using my selectedColumns?

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• Regression tests for T-SQL stored procedures

  - by Achim

  Hi, I would like to regression test t-sql stored procedures. My idea is to specify for each SP multiple input parameter sets. The SP should be executed with these parameters, results should be written to disc. Next time the new results should be compared with results stored before. Does anybody know a good tool for something like that? Should not be that hard to implement, but in practice you will need functionality like "ignore that column" or something like that. And I would assume that such a tool should already exist!? cheers, Achim

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• Java .doc generation

  - by bozo

  Hi, anyone knows an easy method to generate mail merge .doc file from Java? So, I want to create a Word (95/97) document in Word, put some simple placeholders in it (only single value, no iterators and other advanced tags) like the ones used with mailmerge option, and then at runtime replace those placeholders with values from Java. One option is to use Jasperreports, but this would require that I create exact replica of non-trivial Word document in Jasper format, which is not easy and is hard to change later. Is there some method of filling placeholders in Word from Java, which does not require low-level document alteration with positioning and others low-level .doc tags from code, but something like this: docPreparer.fillPlaceholder('placeholder1', 'my real value from runtime'); Some CRMs do this via ActiveX control for internet explorer, and it works great (they use Word's mailmerge) but I need an all-Java solution. Ideas? Thanks, Bozo

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• Multiple rows with a single INSERT in SQLServer 2008

  - by Todd

  I am testing the speed of inserting multiple rows with a single INSERT statement. For example: INSERT INTO [MyTable] VALUES (5, 'dog'), (6, 'cat'), (3, 'fish) This is very fast until I pass 50 rows on a single statement, then the speed drops significantly. Inserting 10000 rows with batches of 50 take 0.9 seconds. Inserting 10000 rows with batches of 51 take 5.7 seconds. My question has two parts: Why is there such a hard performance drop at 50? Can I rely on this behavior and code my application to never send batches larger than 50? My tests were done in c++ and ADO.

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• CSS for https urls

  - by Vincent

  Hello, looking for some help with images referenced within the stylesheet. I have no problems with these from non secure locations within the site but only from https. The stylesheet loads fine and displays everything correctly except for the images. example: body { margin: 0; padding: 0; background: url(/img/background_tile.gif) top left repeat-x; text-align: center; background-color: #fff; } All my css files and other image paths inside the code use relative urls to images. How can I make sure they all work fine without hard coding my image paths with https or http? I want the code to work fine with http and https. Thanks

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• Java variadic function parameters

  - by Amir Rachum

  Hi, I have a function that accepts a variable number of parameters: foo (Class... types); In which I get a certain number of class types. Next, I want to have a function bar( ?? ) That will accepts a variable number of parameters as well, and be able to verify that the variables are the same number (that's easy) and of the same types (the hard part) as was specified in foo. How can I do that? Edit: to clarify, a call could be: foo (String.class, Int.class); bar ("aaa", 32); // OK! bar (3); // ERROR! bar ("aa" , "bb"); //ERROR! Also, foo and bar are methods of the same class.

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• Scala type conversion error, need help!

  - by Mansoor Ashraf

  Hello I am getting a weird error when trying to use a Java map in Scala. This is the snippet of code val value:Double = map.get(name) if (value eq null) map.put(name, time) else map.put(name, value + time) the map is defined as val map=new ConcurrentHashMap[String,Double] and this is the error I am getting error: type mismatch; found : Double required: ?{val eq: ?} Note that implicit conversions are not applicable because they are ambiguous: both method double2Double in object Predef of type (Double)java.lang.Double and method doubleWrapper in object Predef of type (Double)scala.runtime.RichDouble are possible conversion functions from Double to ?{val eq: ?} if (value eq null) map.put(name, time) I am new to Scala so I am having a hard time parsing the stacktrace. Any help would be appreciated

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• Lazy loading of ESB in a jruby rails app

  - by brad

  I have a jruby/rails app using: jruby 1.4.0 Rails 2.3.5 ActiveMQ 5.3.0 Mule ESB 2.2.1 Currently in our environment.rb file we start up Mule in the initializer. This becomes a big pain when we go to do normal rake tasks that don't require JMS/Mule such as db:migrate as it takes a long time to startup/shutdown Mule everytime. The code is similar to this: APP_CONTEXT = Java::our.company.package.service_clients.Initializer.getAppContext(MULE_CONFIG_PATH) And we use APP_CONTEXT to fetch the bean to connect to the appropriate service. I'm trying to figure out some mechanism by which APP_CONTEXT could be lazily instantiated (not in initialize) to avoid all of the pains of having to startup Mule on initialize. Currently we have a few ruby client classes that are instantiated as a before_filter in application_controller such as @data_service = DataService.new(APP_CONTEXT) that initialize the proper java client for each request for use in our controllers. I'm open to all suggestions. I'm having a hard time trying to find the right place to put this lazy instantiation.

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• Does this schema sound better suited for a document-oriented data store or relational?

  - by Blaine LaFreniere

  Disclaimer: let me know if this question is better suited for serverfault.com I want to store information on music, specifically: genres artists albums songs This information will be used in a web application, and I want people to be able to see all of the songs associated to an album, and albums associated to an artist, and artists associated to a genre. I'm currently using MySQL, but before I make a decision to switch I want to know: How easy is scaling horizontally? Is it easier to manage than an SQL based solution? Would the above data I want to store be too hard to do schema-free? When I think association, I immediately think RDBMSs; can data be stored in something like CouchDB but still have some kind of association as stated above?

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• Using SharePoint user profiles to build a company phone directory

  - by Jonathan

  I'm working on a Sharepoint 2007 (MOSS Std) intranet implementation right now, and one of the things we'd like to do is replace the manually-maintained phone directory with the profile information we're importing from AD. People search is great, but I want to have a big page with all the names and phone numbers of the 150 or so people that work at the company (which means using the People Search webpart with a query hard-coded to return everyone won't work). A few quick searches haven't turned up anything, but this seems like a really common request. Can anyone help me out? I'm not opposed to buying a reasonably-priced webpart to solve this or writing some custom code, but both seem like they shouldn't be required for such a simple request.

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• How to combine mvc2 client side validation with other client side validation?

  - by Andrey

  I have a page using mvc2 with client side validation. The client side validation is provided by Microsoft Ajax mvc validation script. This does very well to validate all fields that are related to the model. I also have fields that are never sent to the server such as the confirm password value, and the accept agreement. For these fields i need pure client side validation. I created the javascript to do this, but am now having a hard time integrating the two validatiosn together. I was hoping that i could do something like add another error to an array, or set the page manually to not valid to make sure that the user cannot submit. Basically follow the same approach that i would with normal asp.net validation. I can't find anything like that. In all examples validators are discussed that are connected to parts of the model. What is my best approach here?

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• Pass array of data to jQuery function

  - by ILMV

  Here's the story... I have a jQuery function that does something, this function is referenced very regularly. One of the input parameters is an array, this array data is hard coded and thus I want to pass the data like this: (this is how I would do it using PHP) myFunction(Array("1"=>"a","2"=>"b","3"=>"c")); Instead of $arr=Array("1"=>"a","2"=>"b","3"=>"c"); myFunction($arr); So how do I achieve this with my jQuery function, I want this to be a one liner if possible.

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• Setting the background colour/highlight colour for a given string range using Core Text

  - by Jasarien

  I have some text laid out using Core Text in my iPhone app. I'm using NSAttributedString to set certain styles within the text for given ranges. I can't seem to find an attribute for setting a background / highlight colour, though it would seem it is possible. I couldn't find an attribute name constant that sounded relevant and the documentation only lists: kCTCharacterShapeAttributeName kCTFontAttributeName kCTKernAttributeName kCTLigatureAttributeName kCTForegroundColorAttributeName kCTForegroundColorFromContextAttributeName kCTParagraphStyleAttributeName kCTStrokeWidthAttributeName kCTStrokeColorAttributeName kCTSuperscriptAttributeName kCTUnderlineColorAttributeName kCTUnderlineStyleAttributeName kCTVerticalFormsAttributeName kCTGlyphInfoAttributeName kCTRunDelegateAttributeName Craig Hockenberry, developer of Twitterrific has said publicly on Twitter that he uses Core Text to render the tweets, and Twitterrific has this background / highlight that I'm talking about when you touch a link. Any help or pointers in the right direction would be fantastic, thanks. Edit: Here's a link to the tweet Craig posted mentioning "Core text, attributed strings and a lot of hard work", and the follow up that mentioned using CTFrameSetter metrics to work out if touches intersect with links.

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• can you help me with 8068 project for Delphi .net please

  - by Lex Dean

  To find an Assembly programmer is very hard to help me I'm a established Delphi programmer that has an old copy of Delphi that is not .net And I have a *.dll that I'm converting into Delphi code for .net I'm on a big learning curve hear as i know little of .net yet. I've just got a computer with .net today!!!!!! I've run the *.dll through a dissembler and started putting jump links in as writing in Delphi assembly you do not do any addressing, just reference links. The file has fixed string structures (i think C++) ASCII & ANSI strings 1/ I do not know how to identify how the code references these structures 2/ and I do not know were the functions begin and what shape they look like The code is free for any one to look at their is not many functions in it. but I have to email it as stack over flow will not allow me to display it. Can you tech me or can you refer me to a friend you may know please to tech me lexdeanair at hotmail.com Best regards, Lex Dean from New Zealand I do not wish to pester any one

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• Asp.net MVC, after using jeditable (Edit in place)

  - by coure06

  Ok, i can use jeditable to edit-in-place some content on a page and the content will be saved to a database. But whats the best way to re get that text-content from db to show into a place holder? p id="paraNo34" class="editable" --What i will write here so that it will get content from a db's table: [Content], where id=="paraNo34". /p The problem is if i will use some hard coded text like p id="paraNo34" class="editable" --Some text here /p I will able to edit-in-place using jeditable but when i will refresh page it will show the same "Some text here" as its not getting data from db.

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• using nested arrays by php http_build_query() and recieve them in flash AS3

  - by Mahmoud

  hi, i am having this hard time figuring what is needed to do, i am using URLVariables to send/recieve values between flash and PHP the problem is, i am unable to access nested arrays ( array inside an array ) with flash heres an example: $dgresult = array("total" = $results); echo http_build_query($dgresult,"flf_"); in flash, all i need to do is to use: var variables:URLVariables = new URLVariables(e.target.data); then i can access it with : variables.total the problem now is when i have nested arrays: $dgresult = array("total" = $results); array_push($dgresult,$another_array); http_build_query($dgresult,"flf_"); i can still access variables.total but what about anything that has flf_ ? how is that possible?

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