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  • An object reference is required for the non-static field, method, or property using global variable

    - by Jose Cardama
    Hello Iam working in a global int in which a variable will be used later. I've made the global variable like this: class Foo { public static int stream = Bass.BASS_StreamCreateFile(path1.Text, 0, 0, BASSFlag.BASS_DEFAULT); } which will be later called like this: Foo.stream and it can also contain more then 1 stream for example stream20,30,etc... The problem here is that it returns me this error: "An object reference is required for the non-static field, method, or property" where I call the text in path1.Text How do I fix this?

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  • iOS didFinishLaunchingWithOptions method options==nil

    - by poopChai
    I was trying to fetch remote notification info when the app was not running,so I was told that I can get from : UILocalNotification *localNotification = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey] in method: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions ,but still can't get info. Then I use alertView to show the info on iPhone(launch without Xcode),still can't get the info. Any other issue would cause this? Please let me know if you have any ideas.

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  • XNA 2D/3D Drawing method?

    - by Adir
    What would be a better parctice, writing the drawing method inside the GameObject class or in the Game class? GameObject obj = new GameObject(); obj.Draw(); Or GameObject obj = new GameObject(); DrawGameObject(obj);

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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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  • C# Threading in a method

    - by user177883
    I have the following method : public List<string> someMethod() { // populate list of strings // dump them to csv file //return to output } Question is: i dont want the user to wait for csv dump, which might take a while. If i use a thread for csvdump, will it complete? before or after the return of output?

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  • Calling a method with an array value in PHP

    - by Saif Bechan
    I have a class like this class someclass{ public function somemethod(){} } Now I have an array: $somearray['someclass'] = new someclass(); $somearray['somemethod'] = 'somemethod'; How can I fire them, I tried the following: $somearray['someclass']->$somearray['somemethod'](); usign this I get the following error: Fatal error: Method name must be a string in ...................... Anyone have an idea on how to do this?

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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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  • 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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  • Message reason why Execute method failed

    - by waanders
    I use the DAO method Execute to delete some records. If this fails this is clear by checking RecordsAffected (it will be 0). But is it possible to get the error message (for instance, to log or to show to the user)? I've try to delete the records by hand in the Table grid I get a clear dialog message, e.g. "The record cannot be deleted or changed because tabel x includes related records".

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  • modify a method/function at runtime

    - by mononym
    I've been looking at the php reflection methods, what i want to do is inject some code after the method is opened and before any return value, for example i want to change: function foo($bar) { $foo = $bar ; return $foo ; } And inject some code into it like: function foo($bar) { //some code here $foo = $bar ; //some code here return $foo ; } possible?

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  • Does there exists a method to render an object using DebuggerDisplayAttribute

    - by Joe
    I have a number of classes that are decorated with DebuggerDisplayAttribute. I want to be able to add trace statements to Unit Tests that will display instances of these classes. Does there exist a method in the .NET Framework that will display an object formatted using DebuggerDisplayAttribute (or fall back to using .ToString() if no DebuggerDisplayAttribute is defined)?

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  • MySQL - What is the correct primary key method

    - by Hammerstein
    I'm starting to develop an application using MySQL and although I've developed apps before using databases, I've normally gone to the incrementing id method. The other day I was reading a posting somewhere and saw someone being picked apart for this, for not properly "normalising the database". I'm not a big database person, but I wanted to make sure I'm doing this right. Any ideas, help / guidance?

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