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• How can I extend Scala collections with an argmax method?

  - by Lukasz Lew

  I would like to add to all collections where it makes sense, an argMax method. How to do it? Use implicits?

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• What is doFilter doing in doFilter method in filters of java?

  - by giri

  I wanna know that in our dofilter method i made this call chain.doFilter. What is doFilter doing inside a doFilter?Is it not gonna get recursive call?

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• How can I call a method written in class1 to class2 ?

  - by srikanth rongali

  I have class1.m . I declared a method and written in it. Now i need to call it into another class. How can I make it? Can we use extern for it like we use for variables. Thank you.

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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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• Logging errors in asp.net mvc, OnException method not enough?

  - by Blankman

  I am logging errors in my controllers method: protected override void OnException(ExceptionContext filterContext) But if I make a type in my view page, or enter a route that doesn't exist, it doesn't seem to log that erorr?

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• Does this keyword exist? When an overriding method needs to call the parent

  - by Carlos

  Often, in C# documentation, you come across a member where the description says something along the lines of "be sure to call the base method if you override this." Is there a way to ensure at compile time that one has actually called the base function?

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• HashMap as return value from Java method in R?

  - by Martin

  Hi, is it possible to return a HashMap to R with the rJava extension of R? E.g. I have a method in Java, which returns a HashMap and I want this HashMap use in R. I tried: .jcall(javaObj, "Ljava/util/HashMap", "getDbInfoMap") This doesn't work. Do I have to put everything into a String[], that I want to pass to R from Java? Or is there another possibility? Any help/info on this would be greatly appreciated.

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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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• Is thread-safe to use the 'yield' operator inside an extension method'?

  - by SDReyes

  Would be thread-safe to use the yield operator inside an extension method? For example: public static CartItem GetItems( this Cart cart ) { { while( cart.hasNext() ) yield return cart.GetNextItem( ); } }

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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 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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• 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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• 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 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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• 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 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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• 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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• 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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• 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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• 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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• 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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• 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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