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• Method parameter that can take an object or a nil?

  - by Dan Ray

  How do I spell a method whose argument can either be an object of a certain type, or nil? You see those all the time in framework classes, but I've just encountered my first instance where it would be useful to create one.

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• How to remove "Input method" submenu selection from StyledText context menu?

  - by Mitja

  I'm using StyledText widget in my SWT app. SWT by default appends "Input method" submenu to the end of existing context menu. Is there any way to remove it?

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• How to make the generic return type of a method dependend of the parameter type?

  - by deamon

  I have a convert method, which takes a String and a class as arguments and constructs an object of the given class, which will be returned. The usage should look like this Something s = Converter.convert("...", Something.class) Is it possible to express this with Java generics? Something like: public static <T> T convert(String source, ??? TClass) What would be ????

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• How to display full documentation of a method as you type in VS?

  - by drasto

  The title is pretty descriptive... Is there any extension that let me see FULL documentation of the method I'm typing ? I would like to see the documentation as I can see it in Object Browser with description of parameters and everything not just some "summary". So what I'd like to see when I type String.Format is: Of cause with an option to see all overrides. It may be part of intelisence or I don't know what it does not really matter.

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• How to do method chaining in Java? o.m1().m2().m3().m4()

  - by Pentium10

  Maybe the title might be better, if someone knows a better one, please edit. I've seen in many Java code notation that after a method we call another, here is an example. Toast.makeText(text).setGravity(Gravity.TOP, 0, 0).setView(layout).show(); As you see after calling makeText on the return we call setGravity and so far. How can I do this with my own classes? Do I have to do anything special?

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• Why doesn't my use of Google Maps' panTo() method or directions work?

  - by Eeyore

  I am having problems with centering the map using the panTo() method - as well as making the directions (from/to) to work like tabs. Here is my code: http://dpaste.com/76251/

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• Most awkward/misleading method in the .Net/C# API?

  - by Earlz

  In light of this question I thought it'd be really neat to have a similar question about C#/.Net. So, what is the most awkward or misleading method name of the .Net and/or C# API?

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• How can I write an extension method that converts a System.Drawing.Bitmap to a byte array?

  - by Patrick Szalapski

  How can I write an extension method that converts a System.Drawing.Bitmap to a byte array? Why not: <Extension()> _ Public Function ToByteArray(ByVal image As System.Drawing.Bitmap) As Byte() Using ms = New MemoryStream() image.Save(ms, image.RawFormat) Return ms.ToArray() End Using End Function Yet when I use that, I get "System.Runtime.InteropServices.ExternalException: A generic error occurred in GDI+." What am I doing wrong?

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• How to invoke the getView method in the baseAdapter in Android from another WebService Bean?

  - by greysh

  The adapter in my code as follows, I extends the base adapter: @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder vHolder; // if (convertView == null) { vHolder = new ViewHolder(); convertView = mInflater.inflate(R.layout.home_item, null); vHolder.albumIcon = (ImageView) convertView .findViewById(R.id.albumIcon); try { Bitmap icon = aws.getAlbumImg(itemInfolist.get(position) .getAlbumInfoCol().get(0).getAlbumID(), 0); if (icon != null) { vHolder.albumIcon.setImageBitmap(icon); } else { vHolder.albumIcon.setImageBitmap(BitmapFactory.decodeResource( context.getResources(), R.drawable.album)); } } catch (Exception e) { vHolder.albumIcon.setImageBitmap(BitmapFactory.decodeResource( context.getResources(), R.drawable.album)); } convertView.setTag(vHolder); return convertView; } However, I download the imagine asynchronously, When invoke Bitmap icon = aws.getAlbumImg(itemInfolist.get(position).getAlbumInfoCol().get(0).getAlbumID(), 0); Some pictures which haven't downloaded will use the default image, after these picutures have downloaded in another Web Service Bean, I want the Web Service bean sends a message to invoke the getView method in this adapter in order to implement the auto refresh function. But if I change the Web Service Download Bean as follows,it will cause the exception 03-19 07:46:33.241: ERROR/AndroidRuntime(716): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. HomeAdapter mHomeAdapter; public AlbumWS(HomeAdapter homeAdapter) { mHomeAdapter = homeAdapter; } And after download, public boolean getAlbumImgWS(final ArrayList albumIDs) { new Thread(new Runnable() { @Override public void run() { // TODO Auto-generated method stub AlbumInfoWS aiws = new AlbumInfoWS(); for (int i = 0; i < albumIDs.size(); ++i) { if (ABSCENTALBUMIMGS.contains(albumIDs.get(i))) { continue; } if (FunctionUtil.isExist(albumIDs.get(i))) { continue; } String urlPath = aiws.getAlbumImage("en_US", Config.IMG_ATTIBUTETYPE, albumIDs.get(i)); boolean ret = FunctionUtil.simpleDownload(Config.HOST + urlPath, "/data/data/com.greysh.amped/img/" + albumIDs.get(i) + ".jpg"); if (!ret) { if (!ABSCENTALBUMIMGS.contains(albumIDs.get(i))) { ABSCENTALBUMIMGS.add(albumIDs.get(i)); } } mHomeAdapter.notifyDataSetChanged(); } } }).start(); return true; }

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• How do I know if an input sting is a method name of a specific class?

  - by Itay Moav

  Inside an object, I get a string and I have to know if there is a method with the same name in the current object I am in. How do I do that?

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• Why can we have static final members but cant have static method in an inner class ?

  - by user275131

  Why can we have static final members but cant have static method in an inner class ? Can we access static final member variables of inner class outside the outer class without instantiating inner class ?

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• How do I add a method to the Form class in Windows Forms?

  - by bhaveshtarkhala

  I want to add a new method in Windows.Forms.Form class.. Please help how to do this if anyone knows..

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• What is the proper method to stop loading a Flex Module before it has completely loaded?

  - by Michael Prescott

  I seem to recall that Loader.unload() could once be used to stop loading a swf before it had finished loading. I can no longer find documentation or the blog where I read this. Perhaps it was an unofficial feature. Anyhow, IModuleInfo, returned by ModuleManager.getModule() has an unload() method. If I want to halt loading a Flex Module that is in progress, do I just call iModuleInfo_instance.unload()?

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• Should I be using the for-loop construct or the forEach method for iteration?

  - by Dutch

  Is one way more efficient? Are there any limitations in one method versus the other? Thanks for any input you guys can give me ;-)

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• Will an object declared in method subject to garbage collection?

  - by SiLent SoNG

  Consider an object declared in a method: public void foo() { Object obj = new Object(); // A long run job that consumes tons of memory and // triggers garbage collection } Is obj subject to garbage collection?

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• Is there a way to use the drawWindow() method on a live website?

  - by Ben Shelock

  I don't think the drawWindow() method works on a live website. Is there a way round it?

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• In C#, what happens when you call an extension method on a null object?

  - by tpower

  Does the method get called with a null value or does it give a null reference exception? MyObject myObject = null; myObject.MyExtensionMethod(); // <-- is this a null reference exception? If this is the case I will never need to check my 'this' parameter for null?

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• Is passing a struct value to a method by-reference in C# an acceptable optimization?

  - by Arc

  Say I have a struct: struct MyStruct { public int X public int Y } And a method in some class that is iterated over many times elsewhere: public bool MyMethod( MyStruct myStruct ) { return ... } Is changing the MyMethod signature to the following an acceptable optimization? public bool MyMethod( ref MyStruct myStruct ) If so, how much of an advantage would it really be? If not, about how many fields would a struct need for a big enough advantage using ref this way?

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• In Ruby, how to write a method to display any object's instance variable names and its values

  - by Jian Lin

  Given any object in Ruby (on Rails), how can I write a method so that it will display that object's instance variable names and its values, like this: @x: 1 @y: 2 @link_to_point: #<Point:0x10031b298 @y=20, @x=38> I also want to be able to print <br> to the end of each instance variable's value so as to print them out nicely on a webpage. the difficulty now seems to be that not every instance variable has an accessor, so it can't be called with obj.send(var_name) (the var_name has the "@" removed, so "@x" becomes "x")

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• what is the required code method of making a sticker app?

  - by zeropt7

  I am new to photo apps, recently I am interested in making a sticker app like those can be seen in the appstore, I know I would need to use uiimagepickercontroller, uiscrollview and uigesturerecognizer. However I wonder which code method should I use for the app to load multiple stickers? Should it be called programmatically? Is that I would need to use the if-statement, say if one sticker is loaded, the app will auto generate a new sticker on top of it?

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• I am passing a Controller as a parameter, can't get to RedirectToAction method?

  - by Blankman

  My method looks like: public static RedirectToResult(Controller controller, ...) { } when I do: controller. I don't see RedirectToAction, how come?

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• What Could be the example scenarios to declare any class or any method as "final"?

  - by Parth

  What Could be the example scenarios to declare any class or any method as "final"? When do we need to do this? Please give me some example to understand the practical use of "final"... please guide me as I am a beginner in OOP

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• I have a ruby view that has this namespace: ActionView::Base.new but i want to add a new method to b

  - by Totty

  I have a ruby view that has this namespace: ActionView::Base.new but i want to add a new method to be available to this ActionView::Base class.

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• What value is hashCode() method is returning in java?

  - by Jothi

  What value is hashCode() method is returning in java?. i read that it is an memory reference of an object. when i print hascode value for new Integer(1), its 1. for String(a) - 97. so i confused. is it ascii or what type of value is?

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• In a django model custom save() method, how should you identify a new object?

  - by MikeN

  I want to trigger a special action in the save() method of a Django model object when I'm saving a new record (not updating an existing record.) Is the check for (self.id != None) necessary and sufficient to guarantee the self record is new and not being updated? Any special cases this might overlook?

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