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• what (clip) and DataLine.Info represents...?

  - by user528050

  I got this code from one of my friend. import java.io.*; import javax.sound.sampled.*; public class xx { public static void main(String args[]) { try { File f=new File("mm.wav"); AudioInputStream a=AudioSystem.getAudioInputStream(f); AudioFormat au=a.getFormat(); DataLine.Info di=new DataLine.Info(Clip.class,au); Clip c=(Clip)AudioSystem.getLine(di); c.open(a); c.start(); } catch(Exception e) { System.out.println("Exception caught "); } } } But i didn't understand what this line means Cilp c=(Clip)AudioSystem.getLine(di); what (clip) represents....? And my 2nd problem is what is the DataLine is it an interface and what is the meaning of this statement DataLine.Info....?

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• Can I have a type that's both, covariant and contravariant, i.e. fully fungible/changeable with sub

  - by Water Cooler v2

  Just a stupid question. I could try it out in 2 minutes, really. It's just that I have 1 GB RAM and have already got 2 instances of VS 2010 open on my desktop, with an instance of VS 2005, too. Opening another instance of VS 2010 would be an over kill. Can I have a type (for now forgetting its semantics) that can be covariant as well as contravariant? For e.g. public interface Foo<in out T> { void DoFooWith(T arg); } Off to Eric Lippert's blog for the meat and potatoes of variance in C# 4.0 as there's little else anywhere that covers adequate ground on the subject.

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• List with items returns empty

  - by Power-Mosfet

  I have created a simple List function but if I Loop through the List it's empty. It should not be! All, thank you for the input. problem solved // List function public class process_hook { public static List<string> pro_hook = list_all_processes(); protected static List<string> list_all_processes() { var list = new List<string>(); foreach (Process i in Process.GetProcesses(".")) { try { foreach (ProcessModule pm in i.Modules) { list.Add(pm.FileName); } } catch { } } return list; } } // call private void button1_Click(object sender, EventArgs e) { foreach (String _list in process_hook.pro_hook) { Console.WriteLine(_list); } }

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• need to changed markup with jquery

  - by user357034

  I have the following markup which I do not have direct access to... <a href="javascript:void(0);" onclick="window.open('/BulkDiscounts.asp?ProductID=318&ProductCode=' + escape('LB30X40ES') + '&Orig_Price=22.95', 'Discounts', 'scrollbars,status,resizable,width=330,height=300');"><iimg src="/v/vspfiles/templates/100/images/buttons/btn_quantitydiscounts.gif" border="0" align="absmiddle"></a> I need to "rewrite" the above as follows... A few things to point out is that the title is coming from a variable escape(global_Current_ProductCode) variable=productcode in the case above it is LB30X40ES The height and weight, price and product id used in the second markup must be from the first markup. Note that these change depending on the product loaded. These are not constants. I would guess the first thing to do was to add the thickbox class. Then I am lost as to what to do next. Basically I need to open up an thickbox iframe with the modified markup.

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• How to raise an event when another event is raised?

  - by WulfgarPro

  Hi, I have an application that handles the OnQuit event of another running application. I would like to raise an additional (custom) event when the OnQuit event is handled. How could I implement such an event? My OnQuit handler is like so: private void StkQuit() { _stkApplicationUi.OnQuit -= StkQuit; Marshal.FinalReleaseComObject(_stkApplicationUi); Application.Exit(); } The reason I require the additional event is so that I can tell my View layer that the application has exited. If this is not the correct way, what would be better? WulfgarPro

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• mvc3 ActionResult does not reload page if is already on it

  - by senzacionale

  public ActionResult DeleteCategory(int id) { CategoryManager manager = new CategoryManager(); manager.DeleteCategory(id); TempData["IsDeleted"] = true; return RedirectToAction("CategoriesList"); } public ActionResult CategoriesList() { List<CategoryModel> model = new CategoryManager().GetAll(); return View(model); } public void DeleteCategory(int categoryId) { using (AsoEntities context = new AsoEntities()) { var categoryToDelete = (from c in context.Categories where c.Id == categoryId select c).SingleOrDefault(); if (categoryToDelete == null) return; context.Categories.DeleteObject(categoryToDelete); context.SaveChanges(); } } when i delete article i go back to CategoriesList but page is not reloaded if i am already on CategoriesList. What to do that page will be reloaded and data will be changed?

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• Failed to sum splited text

  - by user1784753

  I have a problem when summing all of bx3.text to t2.text. first I split bx3.text with space private void total() { string[] ps = bx3.Text.Split(new string[] {" "}, StringSplitOptions.None ); t2.Text = ps.Select(x => Convert.ToInt32(x)).Sum().ToString(); } I did try with t2.text = ps[1] and the number showed was correct. but when i try to sum it all, I got error "Input string was not in a correct format" on (x = Convert.ToInt32(x)) bx3.text is full of user-input number separated by single space " "

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• Simple Java math operations

  - by user1730056

  I'm making a BMI calculator that doesn't seem to be working. The math operations work if i just do something like w/h, but once i had the brackets, it returns an error. If i change the variables w and h and use a constant number, the operation works. Another problem is that although i'm making result a double, it seems to be rounding to the nearest int. Could someone tell me what I'm doing wrong here? public class ass10 { public static void main(String[] args) { bmi(223,100); } public static bmi(int w, int h){ double result; result = (w/(h*h))*703 System.out.println(result) } }

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• Obj-C memory management for an NSView * instance variable

  - by massimoperi

  My custom view has a subview as an instance variable. Here is a sample interface: @interface MyCustomView : NSView { NSView *aSubview; } @end Then, in the .m file, I initialize aSubView and add it to the custom view. - (id)init { self = [super initWithFrame:CGRectMakeFrame(0.0, 0.0, 320.0, 480.0); if (self) { aSubview = [[NSView alloc] initWithFrame(0.0, 0.0, 100.0, 100.0); [self addSubview:aSubview]; } return self; } Where should I release aSubView? In the -dealloc method? - (void)dealloc { [aSubView release]; [super dealloc]; } Or directly after adding it to the custom view in the -init method? - (id)init { [...] [self addSubview:aSubview]; [aSubview release]; [...] } Which one is the best implementation?

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• How to disable listbox auto select item when pressing key

  - by tomfox66

  I have a listbox where I want to copy and paste items within that listbox. Copy and paste works fine but everytime I press "Crtl + C" the item starting with the letter C is automatically selected. Can this automatic selection be disabled or am I missing something here Here is the copy and paste method I implemented: private void listBox_Script_KeyDown(object sender, KeyEventArgs e) { if (e.Control == true && e.KeyCode == Keys.C) { int test = listBox_Script.SelectedIndex; Clipboard.SetDataObject(listBox_Script.Items[listBox_Script.SelectedIndex], true); return; } if (e.Control == true && e.KeyCode == Keys.V) { if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text)) { listBox_Script.Items.Insert(listBox_Script.SelectedIndex + 1, Clipboard.GetDataObject().GetData(DataFormats.Text).ToString()); return; } }

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• Java LinkedList iterator being exhausted prematurely

  - by Sujeet

  I am using LinkedList and retrieving an Iterator object by using list.iterator(). After that, I am checking it.hasNext(), real issue is while checking it.hasNext(), sometimes it returns false. I need help why this is happening, though I have elements in the list. Some code: public synchronized void check(Object obj) throws Exception { Iterator itr = list.iterator(); while(itr.hasNext()) { //This Line I get false.. though i have list size is 1 Item p = (Item)itr.next(); if(p.getId() == null) {continue;} if(p.getId().getElemntId() == obj.getId() || obj.getId() == 0 ) { p.setResponse(obj); notifyAll(); return; } } Log.Error("validate failed obj.getId="+obj.getId()+" **list.size="+list.size()*This shows 1*); throw new Exception("InvalidData"); }

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• How to reuse actions

  - by Kriem

  Of the three parts I want to move, only the last one actually moves. I can't seem to "recycle" the ease action I created. How is this done the correct way? - init { // initial setup [self moveParts]; } - (void)moveParts { id action = [CCMoveBy actionWithDuration:1 position:ccp(0,160)]; id ease = [CCEaseInOut actionWithAction:action]; [part1 runAction:ease]; [part2 runAction:ease]; [part3 runAction:ease]; }

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• how to aggregate information on UIImage?

  - by user1582281

  I want to draw on each drawing cycle 1000 more lines on my UIIMage, right now I do it by : -(void)drawRect { for(int i=0;i<1000;i++) { UIGraphicsBeginImageContext(myImage.size); code to draw line on current context... draw previous info from myImage: [myImage drawInRect:myRect]; //store info from context back to myImage myImage=UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); } //append the image on the right side of current context: [myImage drawInRect:myRightRect]; } problem is that I think that drawing entire image each time just for the few lines added is very expensive, anyone has any idea how to optimize it?

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• How do I make "simple" throughput j2ee-filter?

  - by Tommy

  I'm looking to create a filter that can give me two things: number of request pr minute, and average responsetime pr minute. I already got the individual readings, I'm just not sure how to add them up. My filter captures every request, and it records the time each request takes: public void doFilter(ServletRequest request, ...() { long start = System.currentTimeMillis(); chain.doFilter(request, response); long stop = System.currentTimeMillis(); String time = Util.getTimeDifferenceInSec(start, stop); } This information will be used to create some pretty Google Chart charts. I don't want to store the data in any database. Just a way to get current numbers out when requested As this is a high volume application; low overhead is essential. I'm assuming my applicationserver doesn't provide this information.

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• When using out parameters in a function, is it good practice to initialize them in the function?

  - by adambox

  I have a function that uses out parameters to return multiple values to the caller. I would like to initialize them in the function, but I wasn't sure if that's a bad idea since you don't know when you call the function that it's going to change the values right away. The caller might assume that after the function returns, if whatever it was doing didn't work, the values would be whatever they were initialized to in the caller. Is it ok / good for me to initialize in the function? Example: public static void SomeFunction(int ixID, out string sSomething) { sSomething = ""; sSomething = something(ixID); if (sSomething = "") { somethingelse(); sSomething = "bar" } }

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• Updating label in another form (C#)

  - by cthulhu

  I want to update label of Form1 from Form2. So here's what I have: // Form1 public string Label1 { get { return this.label1.Text; } set { this.label1.Text = value; } } // Form2 private void button1_Click(object sender, EventArgs e) { Form1 frm1 = new Form1(); frm1.Label1 = this.textBox1.Text; this.Close(); } So the above code doesn't work. However, when I add the following: frm1.Show(); after this.Close(); in Form2 code, the Form1 is being opened again (two windows). But I want it to update in the same window so I suggest this.Close() is unnecessary.

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• Opening an Excel worksheet inside a Webbrowser.

  - by rabindrarai

  Hi, I have opened a workbook using WebBrowser. However, it opens the first worksheet in the workbook whereas I would like to open a worksheet based on a name that I provide. Following is the code I used to open the workbook: public void OpenFile(string filename) { // Check the file exists if (!System.IO.File.Exists(filename)) throw new Exception(); m_ExcelFileName = filename; // Load the workbook in the WebBrowser control this.wbMain.Navigate(filename, false); } I would like to thank you in advance for trying to help me.

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• QConnect find no such slot on QCombobox by Qt Creater

  - by user2534154

  I create a window inherit from QWidget I set grid layout to that Window I make a function called handleHeroChange(int index) in public slot inside that window I add a Qcombobox to call that function handleHeroChange(int index). Qtcreator keep telling: QObject::connect: No such slot QWidget::handleHeroChange(int) in ../Testing/Window.cpp:92 Why did i do wrong? THE CODE: Window::Window(QWidget *parent) : QWidget(parent) { QGridLayout *grid = new QGridLayout(this); QComboBox *comboHeroClass = new QComboBox(); comboHeroClass->addItem("Witcher"); comboHeroClass->addItem("Maurander"); comboHeroClass->setCurrentIndex(1); grid->addWidget(comboHeroClass, 2,3,1,1); QComboBox::connect(comboHeroClass, SIGNAL(currentIndexChanged(int)),this, SLOT(handleHeroChange(int))); } void Window::handleHeroChange(int index){ QPixmap myImage; if(index == 0){ }else if(index == 1){ } }

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• Initializing a array after declaration

  - by robUK

  Hello, gcc 4.4.3 c89 I have the following code as a sample of what I am trying to do. I don't know the actual size of the array, until I enter the function. However, I don't think I can set the array size after I have declared it. I need it global as some other functions will need to access the device names. Many thanks for any suggestions, /* global */ char *devices_names[]; void fill_devices(size_t num_devices) { devices_names[num_devices]; /* start filling */ }

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• Bash redirection: save stderr/stdout to different files and still print them out on a console

  - by Alby

  Here is a simple program. class Redirection { public static void main (String args[]){ System.out.println("Hello World_Stdout"); System.err.println("Hello World_Stderr"); } } I want to see the all the outputs on a console, but at the same time I want to store stdout and stderr in different files. I tried the following command, to no avail. $java Redirection 3>&1 2>stderr 1>stdout 1>&3 2>&3 stderr& stdout files have the file size of 0. So basically I want to do what "tee" command does but I also want to capture stderr as well.

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• uitextfield secure

  - by D_R

  I have a UITexetField with "Secure" option enabled in InterfaceBuilder (used to enter a password). Then I try to read, what the user entered. (void)textFieldDidEndEditing:(UITextField *)textField{ NSString *txt = textField.text; int a = 0; } It works fine with iOS 5 but since I use it in iOS6, this method no longer works - neither in simulator, nor at the real device. It was called, but textField.text returns always an empty string. With other UITextFields, without "Secure" option, it works fine. Could somebody help me ?

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• Set intersection of two strings

  - by user1785712

  import java.util.*; class set { public static void main(String args[]) { TreeSet<Character> t1 = new TreeSet<Character>(); TreeSet<Character> t2 = new TreeSet<Character>(); String s1 = "Ambitab bachan"; String s2 = "Ranjikanth"; for(char c1:s1.toCharArray()) t1.add(c1); for(char c2:s2.toCharArray()) t2.add(c2); t2.retainAll(t1); System.out.println(t2); } } this program find the common character in two different string. in this program Treeset is used to store the value and retainAll() method is used to find the common characters. can anybody help me reduce the line of coding.thanks in advance

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• How do I get the value of the item selected in ListView?

  - by user357032

  I thought I could use the position int, but when I click on the item in the list view, nothing happens. Please help! ListView d = (ListView) findViewById(R.id.apo); ArrayAdapter adapt = ArrayAdapter.createFromResource(this, R.array.algebra, android.R.layout.simple_list_item_1); d.setAdapter(adapt); d.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (position == '0') { Intent intent = new Intent(Algebra.this, Alqv.class); startActivity(intent); } if (position == '2') { Intent intent1 = new Intent(Algebra.this, qfs.class); startActivity(intent1); } }); }

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• Creating NSApp inside another nsviewcontroller

  - by DesperateLearner

  I have opened my mac app in a new nsviewcontroller - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { self.masterViewController = [[MasterViewController alloc] initWithNibName:@"MasterViewController" bundle:nil]; [self.window.contentView addSubview:self.masterViewController.view]; self.masterViewController.view.frame = ((NSView*)self.window.contentView).bounds; } Masterviewcontroller has a customized view in the .xib file. When I need to create an NSApp sheet in this NSViewController for another, I'm calling [NSApp beginSheet:_newDataWindow modalForWindow:window modalDelegate:self didEndSelector:nil contextInfo:nil]; I have to use 'window' for beginSheetModalForWindow. But how do I call it from another NSViewController. I end up with compilation error.

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• Send a String[] ArrayList over Socket connection

  - by Duncan Palmer

  So i'm trying to send a String[] Array/List over an open socket connection. I currently have this code: Sending: public void sendData() { try { OutputStream socketStream = socket.getOutputStream(); ObjectOutputStream objectOutput = new ObjectOutputStream(socketStream); objectOutput.writeObject(new String[] {"Test", "Test2", "Test3"}); objectOutput.close(); socketStream.close(); } catch (Exception e) { System.out.println(e.toString()); } } Recieving: public Object readData() { try { InputStream socketStream = socket.getInputStream(); ObjectInputStream objectInput = new ObjectInputStream(new GZIPInputStream(socketStream)); Object a = objectInput.readObject(); return a; } catch(Exception e) { return null; } } After I have recieved the String array/list on the other end I want to be able to iterate through it like I would do normally so I can get the values. My current code doesn't seem to works as it returns null as the value. is this possible?

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