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  • DateTime: Require the user to enter a time component

    - by Heinzi
    Checking if a user input is a valid date or a valid "date + time" is easy: .NET provides DateTime.TryParse (and, in addition, VB.NET provides IsDate). Now, I want to check if the user entered a date including a time component. So, when using a German locale, 31.12.2010 00:00 should be OK, but 31.12.2010 shouldn't. I know I could use DateTime.TryParseExact like this: Dim formats() As String = {"d.M.yyyy H:mm:ss", "dd.M.yyyy H:mm:ss", _ "d.MM.yyyy H:mm:ss", "d.MM.yyyy H:mm:ss", _ "d.M.yyyy H:mm", ...} Dim result = DateTime.TryParseExact(userInput, formats, _ Globalization.CultureInfo.CurrentCulture, ..., result) but then I would hard-code the German format of specifying dates (day dot month dot year), which is considered bad practice and will make trouble should we ever want to localize our application. In addition, formats would be quite a large list of all possible combinations (one digit, two digits, ...). Is there a more elegant solution?

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  • C++ project type: unicode vs multi-byte; pros and cons

    - by Stefan Valianu
    I'm wondering what the Stack Overflow community thinks when it comes to creating a project (thinking primarily c++ here) with a unicode or a multi-byte character set. Are there pros to going Unicode straight from the start, implying all your strings will be in wide format? Are there performance issues / larger memory requirements because of a standard use of a larger character? Is there an advantage to this method? Do some processor architectures handle wide characters better? Are there any reasons to make your project Unicode if you don't plan on supporting additional languages? What reasons would one have for creating a project with a multi-byte character set? How do all of the factors above collide in a high performance environment (such as a modern video game) ?

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  • Connecting to a SQL Server Compact Edition (.sdf) from an MFC application

    - by Hazerd
    Hey ! I'm building an MFC app in Visual Studio 2008 which classifies textures and I need some sort of lightweight database to hold the characteristics (just some doubles and strings) which can be: -carried around with the app on different computers; -be able to perform queries on it from the app (searches , updates ,inserts ,etc); Currently I'm looking into SQL compact edition because it was very easy to create from Visual Studio ( I also need only one table) but I having a hard time connecting and updating the db from C++. This is what I've found on msdn regarding C++ and SQLCE: public: void createSqlCeConnection(){ SqlCeConnection* myConnection = new SqlCeConnection(); myConnection->ConnectionString = "DataSource = blabla.sdf"; MessageBox::Show(String::Format( S"Connection State: {0}", __box(myConnection->State))); } Unfortunately my experience with .net apps is pretty limited. Hopefully you bright minds could tell me if I'm on the right path and what links and includes should I add for this to work with an C++ MFC projects. Thanks !

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  • Text formatting within textarea

    - by musoNic80
    Variations on my problem have been discussed elsewhere, so I hope I'm not duplicating! I'm implementing a simple Private Messaging System as part of a web app. I've got an annoying problem though when dynamically inserting text into a textarea box in order to make a reply. Getting the content and displaying it is fine, but I can't work out how to format it correctly. Obviously, I can't use html tags, but plain text formatting like line breaks and carriage returns seem to be ignored too. This happens when an existing message is being displayed either as part of a reply or as a thread in a new message. How do I check what formatting is being saved in my db? Or indeed what formatting is being sent back from my db?!

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  • Properly handling unicode characters in Rails

    - by Gdeglin
    By default Rails allows users of our application to input non-utf8 data, such as: ¶®«¼ However when we attempt to retrieve the data from our database and render it in a template Rails incorrectly assumes that it is in UTF-8 format and throws an error. ArgumentError: invalid byte sequence in UTF-8 What is the best way to handle this? I have seen one fix that suggested sanitizing the data in every place the user can input it. However, that would involve changing a considerable amount of code and it would strip out the characters entirely. Ideally we would want some characters converted to their UTF-8 equivalents. Our environment: Ruby: 1.9.1 Rails 2.3.5 MySql Gem: 2.8.1 This is a serious and urgent problem for us so your answers are very appreciated!

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  • Why doesnt the AsyncCallback update my gridview?

    - by Naruji
    Hi all, I started working with delegates last week and i am trying to update my gridview async on the background. All goes well, no errors or such but i dont get a result after my EndInvoke. does anyone know what i am doing wrong? Here is a code snippet: public delegate string WebServiceDelegate(DataKey key); protected void btnCheckAll_Click(object sender, EventArgs e) { foreach (DataKey key in gvTest.DataKeys) { WebServiceDelegate wsDelegate = new WebServiceDelegate(GetWebserviceStatus); wsDelegate.BeginInvoke(key, new AsyncCallback(UpdateWebserviceStatus), wsDelegate); } } public string GetWebserviceStatus(DataKey key) { return String.Format("Updated {0}", key.Value); } public void UpdateWebserviceStatus(IAsyncResult result) { WebServiceDelegate wsDelegate = (WebServiceDelegate)result.AsyncState; Label lblUpdate = (Label)gvTest.Rows[Convert.ToInt32(key.Value)].FindControl("lblUpdate"); lblUpdate.Text = wsDelegate.EndInvoke(result); }

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  • How do you unit test a unit test?

    - by FlySwat
    I was watching Rob Connerys webcasts on the MVCStoreFront App, and I noticed he was unit testing even the most mundane things, things like: public Decimal DiscountPrice { get { return this.Price - this.Discount; } } Would have a test like: [TestMethod] public void Test_DiscountPrice { Product p = new Product(); p.Price = 100; p.Discount = 20; Assert.IsEqual(p.DiscountPrice,80); } While, I am all for unit testing, I sometimes wonder if this form of test first development is really beneficial, for example, in a real process, you have 3-4 layers above your code (Business Request, Requirements Document, Architecture Document), where the actual defined business rule (Discount Price is Price - Discount) could be misdefined. If that's the situation, your unit test means nothing to you. Additionally, your unit test is another point of failure: [TestMethod] public void Test_DiscountPrice { Product p = new Product(); p.Price = 100; p.Discount = 20; Assert.IsEqual(p.DiscountPrice,90); } Now the test is flawed. Obviously in a simple test, it's no big deal, but say we were testing a complicated business rule. What do we gain here? Fast forward two years into the application's life, when maintenance developers are maintaining it. Now the business changes its rule, and the test breaks again, some rookie developer then fixes the test incorrectly...we now have another point of failure. All I see is more possible points of failure, with no real beneficial return, if the discount price is wrong, the test team will still find the issue, how did unit testing save any work? What am I missing here? Please teach me to love TDD, as I'm having a hard time accepting it as useful so far. I want too, because I want to stay progressive, but it just doesn't make sense to me. EDIT: A couple people keep mentioned that testing helps enforce the spec. It has been my experience that the spec has been wrong as well, more often than not, but maybe I'm doomed to work in an organization where the specs are written by people who shouldn't be writing specs.

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  • Fixed point math in c#?

    - by x4000
    Hi there, I was wondering if anyone here knows of any good resources for fixed point math in c#? I've seen things like this (http://2ddev.72dpiarmy.com/viewtopic.php?id=156) and this (http://stackoverflow.com/questions/79677/whats-the-best-way-to-do-fixed-point-math), and a number of discussions about whether decimal is really fixed point or actually floating point (update: responders have confirmed that it's definitely floating point), but I haven't seen a solid C# library for things like calculating cosine and sine. My needs are simple -- I need the basic operators, plus cosine, sine, arctan2, PI... I think that's about it. Maybe sqrt. I'm programming a 2D RTS game, which I have largely working, but the unit movement when using floating-point math (doubles) has very small inaccuracies over time (10-30 minutes) across multiple machines, leading to desyncs. This is presently only between a 32 bit OS and a 64 bit OS, all the 32 bit machines seem to stay in sync without issue, which is what makes me think this is a floating point issue. I was aware from this as a possible issue from the outset, and so have limited my use of non-integer position math as much as possible, but for smooth diagonal movement at varying speeds I'm calculating the angle between points in radians, then getting the x and y components of movement with sin and cos. That's the main issue. I'm also doing some calculations for line segment intersections, line-circle intersections, circle-rect intersections, etc, that also probably need to move from floating-point to fixed-point to avoid cross-machine issues. If there's something open source in Java or VB or another comparable language, I could probably convert the code for my uses. The main priority for me is accuracy, although I'd like as little speed loss over present performance as possible. This whole fixed point math thing is very new to me, and I'm surprised by how little practical information on it there is on google -- most stuff seems to be either theory or dense C++ header files. Anything you could do to point me in the right direction is much appreciated; if I can get this working, I plan to open-source the math functions I put together so that there will be a resource for other C# programmers out there. UPDATE: I could definitely make a cosine/sine lookup table work for my purposes, but I don't think that would work for arctan2, since I'd need to generate a table with about 64,000x64,000 entries (yikes). If you know any programmatic explanations of efficient ways to calculate things like arctan2, that would be awesome. My math background is all right, but the advanced formulas and traditional math notation are very difficult for me to translate into code.

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  • Spring 3.0: Handler mapping issue

    - by Yaniv Cohen
    I am having a trouble mapping a specific URL request to one of the controllers in my project. the URL is : http://HOSTNAME/api/v1/profiles.json the war which is deployed is: api.war the error I get is the following: [PageNotFound] No mapping found for HTTP request with URI [/api/v1/profiles.json] in DispatcherServlet with name 'action' The configuration I have is the following: web.xml : <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml,/WEB-INF/applicationContext-security.xml</param-value> </context-param> <!-- Cache Control filter --> <filter> <filter-name>cacheControlFilter</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <!-- Cache Control filter mapping --> <filter-mapping> <filter-name>cacheControlFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Spring security filter --> <filter> <filter-name>springSecurityFilterChain</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <!-- Spring security filter mapping --> <filter-mapping> <filter-name>springSecurityFilterChain</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Spring listener --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- Spring Controller --> <servlet> <servlet-name>action</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>action</servlet-name> <url-pattern>/v1/*</url-pattern> </servlet-mapping> The action-servlet.xml: <mvc:annotation-driven/> <bean id="contentNegotiatingViewResolver" class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> <property name="favorPathExtension" value="true" /> <property name="favorParameter" value="true" /> <!-- default media format parameter name is 'format' --> <property name="ignoreAcceptHeader" value="false" /> <property name="order" value="1" /> <property name="mediaTypes"> <map> <entry key="html" value="text/html"/> <entry key="json" value="application/json" /> <entry key="xml" value="application/xml" /> </map> </property> <property name="viewResolvers"> <list> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> </bean> </list> </property> <property name="defaultViews"> <list> <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" /> <bean class="org.springframework.web.servlet.view.xml.MarshallingView"> <constructor-arg> <bean class="org.springframework.oxm.xstream.XStreamMarshaller" /> </constructor-arg> </bean> </list> </property> </bean> the application context security: <sec:http auto-config='true' > <sec:intercept-url pattern="/login.*" filters="none"/> <sec:intercept-url pattern="/oauth/**" access="ROLE_USER" /> <sec:intercept-url pattern="/v1/**" access="ROLE_USER" /> <sec:intercept-url pattern="/request_token_authorized.jsp" access="ROLE_USER" /> <sec:intercept-url pattern="/**" access="ROLE_USER"/> <sec:form-login authentication-failure-url ="/login.html" default-target-url ="/login.html" login-page ="/login.html" login-processing-url ="/login.html" /> <sec:logout logout-success-url="/index.html" logout-url="/logout.html" /> </sec:http> the controller: @Controller public class ProfilesController { @RequestMapping(value = {"/v1/profiles"}, method = {RequestMethod.GET,RequestMethod.POST}) public void getProfilesList(@ModelAttribute("response") Response response) { .... } } the request never reaches this controller. Any ideas?

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  • Writing a blackjack console program in Java

    - by user337465
    Hello, I have an assignment of making a blackjack like program in a class. My first problem I am dealing with is creating an array of the cards. The professor wants an array setup with a txt file with the following format. 2 of hearts 2 of diamonds 2 of spades 2 of clubs 3 of hearts 3 of diamonds 3 of spades This goes on till face cards when it replaces the number with jack, queen, king, ace. Following the professors requirements, How would I take input from the txt file and just store the number and the hearts,diamonds,spades, and clubs. Thank you for the help

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  • Is there a difference between boost iostream mapped file and boost interprocess mapped file?

    - by Yijinsei
    I want to create a mapped binary file into memory; however I am not sure how to create the file to be mapped into the system. I read the documentation several times and realize there are 2 mapped file implementations, one in iostream and the other in interprocess. Do you guys have any idea on how to create a mapped file into shared memory? I am trying to allow a multi-threaded program to read an array of large double written in a binary file format. Also what is the difference between the mapped file in iostream and interprocess?

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  • How to save file using JFileChooser??

    - by Lokesh Kumar
    Hi, I have a method in my application called "Save as" which Saves the image of my application on computer my into a file. I used the JFileChooser to let the users choose their desired location for saving the file. The problem is unless user explicitly types in the file format, it saves the file with no extension. How can I have formats like jpg, png in the File Type drop down menu. and, how can i get extension from the File Type drop menu for saving my image file. ImageIO.write(image,extension,file);

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  • how to set filter for directories qt qfiledialog

    - by sneha
    hello everyone,i would like to know is there any way to select only some directories and some files at a time using qfiledialog class.here i set filesfilter..but i also need to set folder filter i mean i want only certain/some folders to be selected of name (i mean i need a filter for folders too.. coz i hav a common format for my application folders like example : name.abc,flight.abc etc all these are my folder names..i want to enable selection only for these type of folders which are named at last as .abc) i am using QStringList files = QFileDialog::getOpenFileNames(this, tr("Files & Directories"), QDir::currentPath(),tr(".doc.txt") ); tr(".doc.txt") is my files filter,same way i need folders filter with name only .abc at the end

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  • Embedding wav files in AS3 Flash/Flex project?

    - by aaaidan
    The Flash IDE is capable of embedding many types of uncompressed sound files, including wav, and offers optional compression when publishing. However, the [Embed] tag, only seems to allow embedding of mp3 files. Is it truly impossible to embed an uncompressed wav file, or am I missing some magic, undocumented mimeType? I was hoping for something like: [Embed source="../../audio/wibble.wav" mimeType="audio/wav"] ...but I get no transcoder registered for mimeType 'audio/wav' It's possible to embed wav or other format as an octet-stream and parse at runtime, but that's pretty heavy handed I think. I'm surprised that even though the Flash IDE can embed uncompressed sound data, [Embed] cannot, given that the swf spec can contain uncompressed sound data. Any takers?

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  • Themes in Android?

    - by androidbase Praveen
    Hi All, i have an Idea to create Themes for Android Mobile. But i have no knowledge on that. i would need to know about the things what is the file format of theme for android? what kind of things i want to handle to change the themes.(i.e background, directory window, wallpaper, icon slector style,etc like that.) how to start to learn about this. sites and tutorials for beginners. sample applications and codes. if you passed out about anything above. Please share with me. its more helpful. thanks.

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  • All Countries States Cities and Zipcodes in a Application

    - by Rishav Rastogi
    Is there a way getting all countries, states,cities zipcodes/ in one single database. I have been looking all over. I discovered geonames.org, which has I guess all of the content. But there is no way to fetch that data directly. I am using rails. If there any helpers or Plugins, it'd be great. It would be awesome if there is a complete resource in any parsable format which I can use to get this database in place. Please recommend if you any thanks I do have the iso country code list but no States for some countries. Thanks in advance

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  • Create Task Report from Mylyn?

    - by luis.espinal
    Hello all - is there a way to create a task/activity report (say a weekly report) off tasks managed with Mylyn? I've been using Rachota TimeTracker which allows me to create reports (in html format) http://rachota.sourceforge.net/en/demo.html I've just started using mylyn (our company uses Embarcadero JBuilder which is is based on Eclipse), but I don't see anywhere in the Eclipse or Embarcadero docs about reporting capabilities. Is it possible? Is it possible to query activities worked on a prior week and report statistics out of it (management like reports, you know;) I'm sure it is, but I haven't been able to google it out. Thanks.

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  • jQuery Form, ASP.NET MVC JSon Result

    - by Stacey
    I'm trying to return a json result from a jQuery Form instance - but it keeps prompting me to download a file instead of displaying it in the window like it is supposed to... $("#ajaxImageForm").ajaxForm({ iframe: true, type: "GET", dataType: "json", beforeSubmit: function() { $("#ajaxImageForm").block({ message: '<img src="/content/images/loader.gif" /> Uploading . . .' }); }, success: function(result) { $("#ajaxImageForm").unblock(); $.growlUI(null, result.message); } }); [AcceptVerbs(HttpVerbs.Post)] public JsonResult Edit(FormCollection collection) { // return Json to the jQuery Form Result return new JsonResult { Data = new { message = string.Format("edited successfully.") } }; }

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  • How to get a Magento product collection as a comma separated list of SKU's

    - by Sam
    Hi All I have a custom module I made for Magento. From the admin, there is a multi-select list of store products. The selected products from this are output in the form of a comma separated list of SKU's - for example: // Get Featured Products from list $configData = Mage::getStoreConfig('featured_products'); $featuredlist = $configData['settings']['featuredlist']; This gives the output in the following format if I < ?php echo $featuredlist ?: cn,asc,ken,steve,nine,ecco,ana Is it possible to output a collection from a category in the same way, as a comma separated list of SKU's? I currently use the following to get a collection: $_productCollection = Mage::getResourceModel('reports/product_collection') ->addAttributeToSelect('*') ->addAttributeToFilter('visibility', $visibility) ->addCategoryFilter($_category); $_productCollection->load()

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  • Date only from TextBoxFor()

    - by thekronos
    Hello, I'm having trouble displaying the only date part of a datetime into a textbox using TextBoxFor<,(expression, htmlAttributes). The model is based on Linq2SQL, field is a DateTime on SQL and in the Entity model. Failed : <%= Html.TextBoxFor(model => model.dtArrivalDate, String.Format("{0:dd/MM/yyyy}", Model.dtArrivalDate))%> Ps : this trick seems to be depreciated, any string value in the object htmlAttribute is ignored. Failed : [DisplayFormat( DataFormatString= "{0:dd/MM/yyyy}" )] public string dtArrivalDate { get; set; } I would like to store and display the date part only on the details/edit view without the "00:00:00" part. Any idea please ? Merry Chrismas from France to all by the way ;-)

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  • Header file-name as argument

    - by Alphaneo
    Objective: I have a list of header files (about 50 of them), And each header-file has few arrays with constant elements. I need to write a program to count the elements of the array. And create some other form of output (which will be used by the hardware group). My solution: I included all the 50 odd files and wrote an application. And then I dumped all the elements of the array into the specified format. My environment: Visual Studio V6, Windows XP My problem: Each time there is a new set of Header files, I am now changing the VC++ project settings to point to the new set of header files, and then rebuild. My question: A bit in-sane though, Is there any way to mention the header from some command line arguments or something? I just want to avoid re-compiling the source every time...

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  • Why does does my stack overflow error occur after 518669 specifically?

    - by David
    I created a java program to count up toward infinity: class up { public static void up (int n) { System.out.println (n) ; up (n+1) ; } public static void main (String[] arg) { up (1) ; } } i didn't actually expect it to get there but the thing that i noticed that was a bit curious was that it stopped at the same number each time: 518669 what is the significance of this number? (or of this number +1 i suppose). (also as a bit of an aside question, I've been told that the way i format my code is bad [indentation and such] what am i doing that isn't desirable?)

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  • string matching algorithms used by lucene

    - by iamrohitbanga
    i want to know the string matching algorithms used by Apache Lucene. i have been going through the index file format used by lucene given here. it seems that lucene stores all words occurring in the text as is with their frequency of occurrence in each document. but as far as i know that for efficient string matching it would need to preprocess the words occurring in the Documents. example: search for "iamrohitbanga is a user of stackoverflow" (use fuzzy matching) in some documents. it is possible that there is a document containing the string "rohit banga" to find that the substrings rohit and banga are present in the search string, it would use some efficient substring matching. i want to know which algorithm it is. also if it does some preprocessing which function call in the java api triggers it.

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  • R Question: calculating deltas in a timeseries

    - by Jörg Beyer
    I have a timeseries of samples in R: > str(d) 'data.frame': 5 obs. of 3 variables: $ date: POSIXct, format: "2010-03-04 20:47:00" "2010-03-04 21:47:00" ... $ x : num 0 10 11 15.2 20 $ y : num 0 5 7.5 8.4 12.5 > d date x y 1 2010-03-04 20:47:00 0.0 0.0 2 2010-03-04 21:47:00 10.0 5.0 3 2010-03-04 22:47:00 11.0 7.5 4 2010-03-04 23:47:00 15.2 8.4 5 2010-03-05 00:47:00 20.0 12.5 In this example samples for x and y are taken every hour (but the time delta is not fix). The x and y values are always growing (like a milage counter in a car). I need the deltas, how much was the growth in between, something like this: 1 2010-03-04 20:47:00 0.0 0.0 2 2010-03-04 21:47:00 10.0 5.0 3 2010-03-04 22:47:00 1.0 2.5 4 2010-03-04 23:47:00 4.2 0.9 5 2010-03-05 00:47:00 4.8 4.1 And I also need the detlas per time (x and y delta, divided by the time - delta per hour) How would I do this in R?

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  • JQuery Ajax response not triggering success

    - by Mohammad
    This is my code, $.ajax({ type:"get", //this doesn't work //url:'http://example.com/json.php', //But this works url:'http://api.flickr.com/services/feeds/photos_public.gne?tags=cat&tagmode=any&format=json&jsoncallback=?', dataType:"jsonp", success:function(data){ alert('success'); }, error:function(){ alert('error'); } }); in json.php I have <?php header("Content-type: application/javascript"); ?> Then I've copied all the output of that flickr url. So the problem shouldn't be in the content of my code but how it's being sent. What do i need to fix here? Thanks in advance!

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