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  • C# DateTime, is this method regional setting safe?

    - by JL
    I am using the following method to serialize a date as a string private const string DateFormatString = "dd.MM.yyyy HH:mm:ss"; string LastsuccessfuldownloadDateTime = DateTime.Now.AddDays(-91).ToString(DateFormatString); Is this the safest way to ensure that the string always gets serialized in this format?

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  • Rails 3 render and method call in another controller

    - by akam
    Hello, I am using rails 3: I would like to render a portion of view which is build by a 'notification' method in message class so I've add in my application.html.erb : <li><%= render :action => "notification", :controller => "messages" %></li> The goal of my file notification.html.erb is to display in a red circle the number of notifications in all my pages. I don't think I am in the good way, any ideas ? Thanks all :)

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  • Use of const in a method

    - by kouPhax
    In the following method, public void InspectList(IList<int> values) { if(values != null) { const string format = "Element At {0}"; foreach(int i in values) { Log(string.Format(format, i)); } } } Does the use of const provide any benefit over just declaring the string as a string? Woudl it not be interned anyway?

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  • c++ setting string attribute value in class is throwing "Access violation reading location"

    - by user259789
    I am having some trouble getting this simple code to work: class CreateUserView { public: CreateUserView(void); ~CreateUserView(void); UserController* controller; void showView(); string name; string lastname; string address; string email; string dateOfBirth; }; All i need is to set these attributes in the implementation with getline(). CreateUserView::CreateUserView(void) { } void CreateUserView::showView() { cout << endl << " New User" << endl; cout << "--------------------------" << endl; cout << " Name\t\t: "; getline(cin, name); cout << " Lastname\t: "; getline(cin, lastname); cout << " Email\t\t: "; getline(cin, email); cout << " ===============================" << endl; cout << " 1. SAVE 2.CHANGE 3.CANCEL" << endl; cout << " ===============================" << endl; cout << " choice: "; int choice; cin >> choice; cin.ignore(); controller->createUser_choice(choice); } I keep getting this "Access violation reading location" error at this line: getline(cin, name); what's the best way of assigning a value to an std::string attribute of a class? even name = "whatever" is throwing that error!! thanks

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  • Access static Method in GDB

    - by Besi
    I recently discovered the GDB in Xcode which makes up for some functionality which IMHO seems to be lacking in Xcode. So I can do the following in GDB: (gdb) po [LoginManager sharedSession].loginToken 20D52FE9-3573-437E-9A65-846572B63726 However, I have another Service class, which is currently not loaded so I get the following error: (gdb) po [SessionService displaySessionInfoForToken:@"XXX"] No symbol "SessionService" in current context. I don't understand why the LoginManager can be loaded but not the SessionService.

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  • How to define a class with variable properties?

    - by user1723326
    I'm making a database program. I want the user to be able to define their own columns, as many as they want. How would I then define each record in its class file?(Since the properties would be different user to user) EDIT: It's part of a school assignment-it's going to hold different scores and the likes for the teacher for different students they can add, but they will also be able to add a new assignment, test(a column) .

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  • From Java Object class to C++

    - by Rui
    Hi, I'm relative new to C++ and my background is in Java. I have to port some code from Java to C++ and some doubts came up relative to the Object Java's class. So, if I want to port this: void Algorithm::setInputParameter(std::string name, Object object) { ..... } I believe I should use void* type or templates right? I don't know what's the "standard" procedure to accomplish it. Thanks

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  • useless class storage specifier in empty declaration

    - by robUK
    Hello, gcc 4.4.1 c89 I have the following code and I get a warning: unless class storage specifier in empty declaration static enum states { ACTIVE, RUNNING, STOPPED, IDLE } However, if i remove the static keyword I don't get that warning. I am compiling with the following flags: -Wall -Wextra Many thanks for any suggestions,

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  • Big O Complexity of a method

    - by timeNomad
    I have this method: public static int what(String str, char start, char end) { int count=0; for(int i=0;i<str.length(); i++) { if(str.charAt(i) == start) { for(int j=i+1;j<str.length(); j++) { if(str.charAt(j) == end) count++; } } } return count; } What I need to find is: 1) What is it doing? Answer: counting the total number of end occurrences after EACH (or is it? Not specified in the assignment, point 3 depends on this) start. 2) What is its complexity? Answer: the first loops iterates over the string completely, so it's at least O(n), the second loop executes only if start char is found and even then partially (index at which start was found + 1). Although, big O is all about worst case no? So in the worst case, start is the 1st char & the inner iteration iterates over the string n-1 times, the -1 is a constant so it's n. But, the inner loop won't be executed every outer iteration pass, statistically, but since big O is about worst case, is it correct to say the complexity of it is O(n^2)? Ignoring any constants and the fact that in 99.99% of times the inner loop won't execute every outer loop pass. 3) Rewrite it so that complexity is lower. What I'm not sure of is whether start occurs at most once or more, if once at most, then method can be rewritten using one loop (having a flag indicating whether start has been encountered and from there on incrementing count at each end occurrence), yielding a complexity of O(n). In case though, that start can appear multiple times, which most likely it is, because assignment is of a Java course and I don't think they would make such ambiguity. Solving, in this case, is not possible using one loop... WAIT! Yes it is..! Just have a variable, say, inc to be incremented each time start is encountered & used to increment count each time end is encountered after the 1st start was found: inc = 0, count = 0 if (current char == start) inc++ if (inc > 0 && current char == end) count += inc This would also yield a complexity of O(n)? Because there is only 1 loop. Yes I realize I wrote a lot hehe, but what I also realized is that I understand a lot better by forming my thoughts into words...

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  • How to get the type of the class for comparison

    - by Halo
    I have this object which is an instance of a superclass. I want to know which subclass that object really is, so that I can decide what to do with it. There is this getClass() method but it's apparently not used for comparison issues. How can I get the sub-type of my object?

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  • intrusive_ptr: Why isn't a common base class provided?

    - by Jon
    intrusive_ptr requires intrusive_ptr_add_ref and intrusive_ptr_release to be defined. Why isn't a base class provided which will do this? There is an example here: http://lists.boost.org/Archives/boost/2004/06/66957.php, but the poster says "I don't necessarily think this is a good idea". Why not?

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  • Protected Class In C#

    - by ChloeRadshaw
    This compiles well for me - However other people on a different thread are saying that protected classes cannot be declared in c# at top level Is that the case? using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication1 { protected class CsvReader { } }

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  • convert a class to byte array + C#

    - by Newbie
    How can I convert a Class to byte array in C#. This is a managed one so the following code is failing int objsize = System.Runtime.InteropServices.Marshal.SizeOf(objTimeSeries3D); byte[] arr = new byte[objsize]; IntPtr buff = System.Runtime.InteropServices.Marshal.AllocHGlobal(objsize); System.Runtime.InteropServices.Marshal.StructureToPtr(objTimeSeries3D, buff, true); System.Runtime.InteropServices.Marshal.Copy(buff, arr, 0, objsize); System.Runtime.InteropServices.Marshal.FreeHGlobal(buff); Thanks

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  • Accessing Custom Configurations in NUnit class

    - by Martin Ongtangco
    I'm really banging my head onto this one. I can't make the Custom Configuration to work with NUnit. It kept on failing to read the configuration file. I followed carefully this article: http://devlicio.us/blogs/derik_whittaker/archive/2006/11/13/app-config-and-custom-configuration-sections.aspx placed the references in the Unit test class App.Config, still everything failed. Is there some sort of a magic setting to do here?

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  • Mandatory method documentation

    - by Sjoerd
    On my previous job, providing all methods with javadoc was mandatory, which resulted in things like this: /** * Sets the Frobber. * * @param frobber The frobber */ public setFrobber(Frobber frobber) { ... } As you can see, the documentation adds little to the code, but takes up space and work. Should documenting all methods be mandatory or optional? Is there a rule for which methods to document? What are pros and cons of requiring every method to be documented?

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