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  • CSS LESS class inheritance

    - by Haradzieniec
    Here is a css description of properties for my #myform1 .btn1 class: #myform1 .btn1 { ... } #myform1 .btn1:hover { ... } #myform1 .btn1.active { ... } #myform1 .btn1.disabled { ... } Is it possible to add absolutely the same properties for my #myform2 .btn2 class using LESS (any way is OK) without writing #myform1 .btn1 ,#myform2 .btn2 { ... } #myform1 .btn1:hover, #myform2 .btn2:hover { ... } #myform1 .btn1.active, #myform2 .btn2.active { ... } #myform1 .btn1.disabled, #myform2 .btn2.disabled { ... } Is it possible?

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  • jQuery not selecting div class

    - by Cortopasta
    Trying to make a simple toggle menu, and I can't seem to hide/show the sub menu using this bit of jQuery: $(".topic news").mouseup(function(){ $(".feed groups").hide("fast", function(){ $(".feed messages").hide("fast"); $("ul.feed news").toggle("fast"); }); }); Here is the corresponding HTML: <div class="topic news"> <span>News Feed</span> </div> <ul class="feed news"> <li>News item #1</li> <li>News item #1</li> <li>News item #1</li> <li>News item #1</li> <li>News item #1</li> </ul> Any ideas?

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  • Counting bits set in a .Net BitArray Class

    - by Sam
    I am implementing a library where I am extensively using the .Net BitArray class and need an equivalent to the Java BitSet.Cardinality() method, i.e. a method which returns the number of bits set. I was thinking of implementing it as an extension method for the BitArray class. The trivial implementation is to iterate and count the bits set (like below), but I wanted a faster implementation as I would be performing thousands of set operations and counting the answer. Is there a faster way than the example below? count = 0; for (int i = 0; i < mybitarray.Length; i++) { if (mybitarray [i]) count++; }

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  • Pass a class as a parameter?

    - by JuBu1324
    I have been lead to believe that it is possible to pass a class as a method parameter, but I'm having trouble implementing the concept. Right now I have something like: - (id)navControllerFromView:(Class *)viewControllerClass title:(NSString *)title imageName:(NSString *)imageName { viewControllerClass *viewController = [[viewControllerClass alloc] init]; UINavigationController *thisNavController = [[UINavigationController alloc] initWithRootViewController: viewController]; thisNavController.tabBarItem = [[UITabBarItem alloc] initWithTitle: title image: [UIImage imageNamed: imageName] tag: 3]; return thisNavController; } and I call it like this: rootNavController = [ self navControllerFromView:RootViewController title:@"Contact" imageName:@"my_info.png" ]; What's wrong with this picture?

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  • Class declaration bug (NoClassDefFoundError caused by ClassNotFoundException)

    - by aladine
    Please advise me what's wrong with this class declaration: ExchEngine.java package engine; public class ExchEngine { public ExchEngine() { } public static void main(String[] args) { ExchEngine engine=new ExchEngine() ; } } When I compile this file, I always get exception: java.lang.NoClassDefFoundError: test_engine/ExchEngine Caused by: java.lang.ClassNotFoundException: test_engine.ExchEngine at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) Exception in thread "main" This seems very weird that ExchEngine.java is inside a package and it cannot run itself. Thanks for any help.

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  • Objective-C and Cocoa : crash when calling a class function without entering the function

    - by Oliver
    Hello, I have a class function (declared and implemented) in a class MyUtils : + (NSString*) theFunction:(NSString*)param1 param2:(NSString*)param2 param3:(NSString*)param3; When I call this function, with : NSString *item = [MyUtils theFunction:@"abc" param2:aPreviousNSString param3:@"xyz"; my app crashes. In the debugger I have a breakpoint on the first action of the "theFunction" function. And this breakpoint is never reached. If I replace the call by NSString *item = @"youyou"; then everything is ok. Forcing a retain on aPreviousNSString before the call does not change anything. Do you have an idea of what is happening ? Thanks

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  • I am having trouble with my first project in ruby on rails

    - by Sebastian
    Here's my index action in the books controller: http://pastebin.com/XdtGRQKV Here's the view for the action i just mentioned: http://pastebin.com/nQFy400m Here's the result without being logged in: http://i.imgur.com/rQoiw.jpg Here's the result when i'm logged in with the user 'admin': http://i.imgur.com/E1CUr.jpg So the problem is that, in the view, before line 25 the 'user' variable seems to be empty ( or not loaded), and after line 25 the variable 'user' has the expected values. I have tried initializing a variable in the index method of the books controller but get exactly the same results. Thanks in advance! BTW had to make the links text because of stackoverflow limit.

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  • Android: How to close a cursor that returns from Class to Activity

    - by Daniel
    I have: Accounts.java public class Accounts{ private SQLiteDatabase dbConfig; public Cursor list(Context context, String db, String where, String order) { DBHelper dbHelper = new DBHelper(context, db); dbConfig = dbHelper.getReadableDatabase(); Cursor c = dbConfig.query("accounts", new String[]{ "iId","sName"}, where, null, null, null, order); return c; } } and: MainActivity.java Accounts account = new Accounts(); Cursor cursor = account.list(getApplicationContext(), globalDB, null, null); while (cursor.moveToNext()) { int id = cursor.getInt(0); String name = cursor.getString(1); } cursor.close(); Running my application I get some logcat messages like: close() was never explicitly called on database... What is the best way to prevent it? How can I close a Cursor that returns from other class? Thanks

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  • Null reference for first memory address between 0 - 65535

    - by Terry
    I would like to understand a bit more about memory and I was unable to find it from Google, please forgive me if this is silly question. How come the following code, accessing memory address 0(and up to 65535) in C# would throw NullReferenceException byte* pointer = (byte*)0; byte test = *pointer; Thanks a lot in advance!

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  • Getting count() of class static array

    - by xylar
    Is it possible to get the count of a class defined static array? For example: class Model_Example { const VALUE_1 = 1; const VALUE_2 = 2; const VALUE_3 = 3; public static $value_array = array( self::VALUE_1 => 'boing', self::VALUE_2 => 'boingboing', self::VALUE_3 => 'boingboingboing', ); public function countit() { // count number $total = count(self::$value_array ); echo ': '; die($total); } } At the moment calling the countit() method returns :

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  • Does this simple cache class need thread synchronization?

    - by DayOne
    Does this simple cache class need thread synchronization ... if I remove the lock _syncLock statement will encounter any problems? I think i can remove the locks as the references should be updated correctly right? ... BUt i'm think whar happens if client code is iterating over the GetMyDataStructure method and it get replaced? Thanks! public sealed class Cache { private readonly object _syncLock = new object(); private IDictionary<int, MyDataStructure> _cache; public Cache() { Refresh(); } public void Refresh() { lock (_syncLock) { _cache = DAL.GetMyDataStructure(); } } public IDictionary<int, MyDataStructure> **GetMyDataStructure**() { lock (_syncLock) { return _cache; } } }

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  • php - efficent way to get and remove first line in file

    - by Marco Demaio
    Hello, I have a script that each time is called gets the 1st line of a file. Each line is known to be exactly of the same length (32 alphanumerci chars) and terminates with a "\r\n". After getting the 1st line, the script removes it. Now I do in this way: $contents = file_get_contents($file)); $first_line = substr($contents, 0, 32); file_put_contents($file, substr($contents, 32 + 2)); //+2 because we remove also the \r\n Obvioulsy it works, but I was wondering if there could be a smarter (or more efficent) way to do this??? In my simple solution I basically read and rewrite all the file just to take and remove the 1st line. Thanks!

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  • ferret,multiple model search -undefined method `aaf_index' for #<Class:>

    - by jissy
    ferret,multiple model search - I have 2 models A and B.I want to perform a text search by using 3 fields; title, description(part of A) and comment(part of B). Where I want to include the comment field to perform the ferret search.Then,what other changes needed. class A < ActiveRecord::Base has_one :b acts_as_ferret :fields => [:title, :description], :additional_fields => [:comment_text] def comment_text return b.comment end In a_controller, i wrote: @search = A.find_with_ferret( params[:st][:text_search], :limit => :all, :multi => [B] ).paginate :per_page =>10, :page=>params[:page] The second mosel is given below: class B < ActiveRecord::Base belongs_to :a while using :multi[B] option with the find_with_ferret,the following error is getting: undefined method `aaf_index' for #ClassName

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  • Android moving back to first activity on button click

    - by cppdev
    I am writing a application where I am dealing with 4 activities, let's say A, B, C & D. Activity A invokes B, B invokes C, C invokes D. On each of the activity, I have a button called "home" button. When user clicks on home button in any of the B, C, D activities, application should go back to A activity screen ? How to simulate "home" button in this case ?

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  • Call a C++ constructor from an Objective C class

    - by syvex
    How can I call a C++ constructor from inside an Objective C class? class CppClass { public: CppClass(int arg1, const std::string& arg2): _arg1(arg1), _arg2(arg2) { } // ... private: int _arg1; std::string _arg2; }; @interface ObjC: NSObject { CppClass _cppClass; } @end @implementation ObjC - (id)init { self = [super init]; if ( self ) { // what is the syntax to call CppClass::CppClass(5, "hello") on _cppClass? } return self; } @end

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  • how to hack this php class for parse ZIP file in random or specific order

    - by Jesse
    My English is poor so I will make it short. Right now, I have imzip.zip which has three txt files: a.txt b.txt c.txt When I try to load imzip.zip using: http://pastebin.com/m1d974990 It loads the files alphabetically. In this case: a.txt b.txt c.txt However, I would like to be able to have the class load on different variables such as by size, date or simply random. The problem is I have no idea how I would go about modifying the class to fit my needs. I would really appreciate your help! :D

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  • Constant template parameter class manages to link externally

    - by the_drow
    I have a class foo with an enum template parameter and for some reason it links to two versions of the ctor in the cpp file. enum Enum { bar, baz }; template <Enum version = bar> class foo { public: foo(); }; // CPP File #include "foo.hpp" foo<bar>::foo() { cout << "bar"; } foo<baz>::foo() { cout << "baz"; } I'm using msvc 2008, is this the standard behavior? Are only type template parameters cannot be linked to cpp files?

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  • Dynamic Object Not Creating for Privately Inherited Class.

    - by mahesh
    Hi, What is the reason for the following code that does not let me to create object. class base { public: void foo() { cout << "base::foo()"; } }; class derived : private base { public: void foo() { cout << "deived::foo()"; } }; void main() { base *d = new derived(); d->foo(); } It Gives me error : " 'type cast' : conversion from 'derived *' to 'base *' exists, but is inaccessible" Thanks in advance :)

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  • jQuery: exclude class on click

    - by Kevin Brown
    //Table select $("#reports-table tr").click( function() { var detail_id = $(this).attr('id'); $(this).addClass("selected"); $(this).siblings().removeClass("selected"); $('#reports-right').show().load('/members/details/'+detail_id); $('#reports-table').width(680); } ); I currently am using this code to add a selected class to a table row and show details of the row clicked in a right 'aside'. The problem is, I have action buttons in the row--when they are clicked, becausee they are children of the tr, this function still runs... How can I exclude a certain class?

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  • Accessing variablss through a different class within the constructor of latter classes of an object

    - by Haxed
    In the code below, I've added two lines that print output. The first line prints junk as usual, but surprisingly the second one gives me a compilation error. Why? class Student { private String name; public Student(String name){ this.name = name; } public String getName(){ return name; } } class StudentServer { public StudentServer(){ Student[] s = new Student[30]; s[0] = new Student("Nick"); // LINE 01: This compiles, although prints junk System.out.println(s[0]); // LINE 02: I get a error called cannot find symbol System.out.println(s[0].getName()); } public static void main(){ new StudentServer(); } } Many Thanks

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  • What should students be taught first when first learning sorting algorithms?

    - by Johan
    If you were a programming teacher and you had to choose one sorting algorithm to teach your students which one would it be? I am asking for only one because I just want to introduce the concept of sorting. Should it be the bubble sort or the selection sort? I have noticed that these two are taught most often. Is there another type of sort that will explain sorting in an easier to understand way?

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