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• Clojure / HBase: How to Import HBaseTestingUtility in v0.94.6.1

  - by David Williams

  In Clojure, if I want to start a test cluster using the hbase testing utility, I have to annotate my dependencies with: [org.apache.hbase/hbase "0.92.2" :classifier "tests" :scope "test"] First of all, I have no idea what this means. According to leiningens sample project.clj ;; Dependencies are listed as [group-id/name version]; in addition ;; to keywords supported by Pomegranate, you can use :native-prefix ;; to specify a prefix. This prefix is used to extract natives in ;; jars that don't adhere to the default "<os>/<arch>/" layout that ;; Leiningen expects. Question 1: What does that mean? Question 2: If I upgrade the version: [org.apache.hbase/hbase "0.94.6.1" :classifier "tests" :scope "test"] Then I receive a ClassNotFoundException Exception in thread "main" java.lang.ClassNotFoundException: org.apache.hadoop.hbase.HBaseConfiguration Whats going on here and how do I fix it?

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• How can I get a view of favorite user documents by user in Couchdb map/reduce?

  - by Jeremy Raymond

  My Couchdb database as a main document type that looks something like: { "_id" : "doc1", "type" : "main_doc", "title" : "the first doc" ... } There is another type of document that stores user information. I want users to be able to tag documents as favorites. Different users can save the same or different documents as favorites. My idea was to introduce a favorite document to track this something like: { "_id" : "fav1", "type" : "favorite", "user_id" : "user1", "doc_id" : "doc1" } It's easy enough to create a view with user_id as the key to get a list of their favorite doc IDs. E.g: function(doc) { if (doc.type == "favorite") { emit(doc.user_id, doc.doc_id); } } However I want to list of favorites to display the user_id, doc_id and title from the document. So output something like: { "key" : "user1", "value" : ["doc1", "the first doc"] }

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• Proper NSArray initialization for ivar data in a method

  - by Joost Schuur

  I'm new to Objective-C and iPhone development and have been using Apress' Beginning iPhone 3 Programming book as my main guide for a few weeks now. In a few cases as part of a viewDidLoad: method, ivars like a breadTypes NSArray are initialized like below, with an intermediate array defined and then ultimately set to the actual array like this: NSArray *breadArray = [[NSArray alloc] initWithObjects:@"White", @"Whole Weat", @"Rye", @"Sourdough", @"Seven Grain", nil]; self.breadTypes = breadArray; [breadArray release]; Why is it done this way, instead of simply like this: self.breadTypes = [[NSArray alloc] initWithObjects:@"White", @"Whole Weat", @"Rye", @"Sourdough", @"Seven Grain", nil]; Both seem to work when I compile and run it. Is the 2nd method above not doing proper memory management? I assume initWithObjects: returns an array with a retain count of 1 and I eventually release breadTypes again in the dealloc: method, so that wraps things up nicely. I'm guessing 'self.breadTypes = ...' copies the data to the new array, which is why the original array can be safely released, correct?

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• dynamically created datagridview columns not accessible unless added to a form...why?

  - by deostroll

  We simply created a DataGridView control dynamically and bound it to a DataTable. We were tying to style certain columns. But, when we tried to access the columns we got a null reference. On further investigation we found that if we add the DataGridView control to the main form, and then try to access its columns, it works fine!!! Code which throws error: DataGridView gv = new DataGridView(); gv.DataSource = GetDataTable(); //binding it to datatable Debug.Assert(gv.Columns == null); Code which works fine: DataGridView gv = new DataGridView(); gv.DataSource = GetDataTable(); //binding it to datatable this.Controls.Add(gv); //adding to form Debug.Assert(gv.Columns == null); //the assertion fails! Why is this behaviour so? Is there a workaround for this?

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• Convert T-SQL function to PL/SQL

  - by llasarov

  can you help me convert following T-SQL funcntion into Oracle. The function converts a string like service|nvretail;language|de;yyyy|2011; to a table. The main problem I have is the usage of the temp table. I could not find any equivalent to it in Oracle. CREATE FUNCTION [dbo].[TF_ConvertPara] ( @parastringNVARCHAR(max) ) RETURNS @para TABLE ( [Key] varchar(max), [Value] varchar(max) ) begin DECLARE @NextString NVARCHAR(40) DECLARE @Pos1 INT DECLARE @Pos2 INT DECLARE @NextPos INT DECLARE @Delimiter1 NCHAR=';' DECLARE @Delimiter2 NCHAR='|' if substring(@paraString, len(@paraString) - 1, 1) <> @Delimiter1 SET @paraString = @paraString + @Delimiter1 SET @Pos1 = charindex(@Delimiter1, @paraString) WHILE (@pos1 <> 0) BEGIN SET @NextString = substring(@paraString, 1, @Pos1 - 1) SET @paraString = substring(@paraString, @pos1 + 1, len(@paraString)) SET @pos1 = charindex(@Delimiter1, @paraString) SET @Pos2 = charindex(@Delimiter2, @NextString) if (@Pos2 > 0) begin insert into @para values (substring(@NextString, 1, @Pos2 - 1), substring(@NextString, @Pos2 + 1, len(@NextString))) end END return; end Thank you in advance.

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• Function with missing return value, behavior at runtime

  - by nabulke

  As expected, the compiler (VisualStudio 2008) will give a warning warning C4715: 'doSomethingWith' : not all control paths return a value when compiling the following code: int doSomethingWith(int value) { int returnValue = 3; bool condition = false; if(condition) // returnValue += value; // DOH return returnValue; } int main(int argc, char* argv[]) { int foo = 10; int result = doSomethingWith(foo); return 0; } But the program runs just fine. The return value of function doSomethingWith() is 0. Is is just undefined behavior, or is there a certain rule how the result value is created/computed at runtime. What happens with non-POD datatypes as return value?

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• Errors/warnings passing int/char arrays by reference

  - by Ankur Banerjee

  I'm working on a program where I try to pass parameters by reference. I'm trying to pass a 2D int array and a 1D char array by reference. Function prototype: void foo (int* (&a)[2][2], char* (&b)[4]) Function call: foo (a, b); However, when I compile the code with -ansi and -Wall flags on gcc, I get the following errors: foo.c: At top level: error: expected ‘)’ before ‘&’ token error: expected ‘;’, ‘,’ or ‘)’ before ‘char’ foo.c: In function ‘main’: error: too many arguments to function ‘foo’ I've stripped out the rest of the code of my program and concentrated on the bits which throw up the errors. I've searched around on StackOverflow and tried out different ways to pass the parameters, but none of them seem to work. (I took this way of passing parameters from the discussion on StackOverflow here.) Could you please tell me where I'm going wrong?

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• What is a custom collection?

  - by Win Coder

  A Group of objects. However i am having confusion in the following case. A sample class Class A { public string; } Class A_list { public A[] list; public A_list(A[] _list) { list = new A[_list.length]; for (int i = 0; i < _list.Length; i++) { list[i] = _list[i]; } } } static void Main(String[] args) { A[] names = new A[3] { new A("some"), new A("another"), new A("one"), }; A_list just_an_object = new A_list(names); } Which of the above is a custom collection the array or the object that holds array as a field or are both custom collections.

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• Java: Get Mainform object from JInternalFrame

  - by rodion

  Can I do this without reference to the object in the constructor? In other words, any class inherited from FrmTaoChild when creating must to add the button on the toolbar of the main window public class FrmTaoMain extends JFrame { JToolBar tbTask = new JToolBar(); public FrmTaoMain(String Caption) { super(Caption); ... FrmTaoChild FrmChild = new FrmTaoChild(tbTask,"test"); } } public class FrmTaoChild extends JInternalFrame { public FrmTaoChild(JToolBar tbTask, String Caption) { super (Caption); JButton btnTask = new JButton(Caption); tbTask.add(btnTask); } }

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• Annoying Blank pop-up window go away

  - by No Soup for YOU

  Hi All, Sorry about the wording for my question title. I have a basic HTML anchor tag that when clicked it is suppose to bring up a dialog box to download a file from a differnt website. I am using an attribute of target="_blank" so that when my hyperlink is clicked, I don't navigate away from my main window. This is all the easy part (if it was so easy I wouldnt be here though). When I do the above though, and click on the hyperlink, an annoying blank window pops up with my download dialog box behind it. How do I get rid of that annoying blank window and keep only my download dialog box on the screen? Below is the HTML I'm working with... <a href="http://www.fake-domain-name.com/downloads/setup.msi" target="_blank"> <img src="images/download.png" alt="download file"/> </a>

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• Accents in file name using Java on Solaris

  - by Stef

  I have a problem where I can't write files with accents in the file name on Solaris. Given following code public static void main(String[] args) { System.out.println("Charset = "+ Charset.defaultCharset().toString()); System.out.println("testéörtkuoë"); FileWriter fw = null; try { fw = new FileWriter("testéörtkuoë"); fw.write("testéörtkuoëéörtkuoë"); fw.close(); I get following output Charset = ISO-8859-1 test??rtkuo? and I get a file called "test??rtkuo?" Based on info I found on StackOverflow, I tried to call the Java app by adding "-Dfile.encoding=UTF-8" at startup. This returns following output Charset = UTF-8 testéörtkuoë But the filename is still "test??rtkuo?" Any help is much appreciated. Stef

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• Guice + Quartz + iBatis

  - by DroidIn.net

  I'm trying to wire together Guice (Java), Quartz scheduler and iBatis (iBaGuice) to do the following: Start command line utility-scanner using main() Periodically scan directory (provided as argument) for files containing formatted output (XML or YAML) When file is detected, parse and output result to the database The problems: I used this example to wire Guice and Quartz. However I'm missing some important details which I'm asking in the comments but the post is somewhat dated so I'm quoting it here also: It's not obvious how to set-up the scheduler. Where and how would I wire the Trigger (I can use Trigger#makeMinutelyTrigger)? I really have just one type of job I will be executing, I understand that details in the JobFactory#newJob are coming from the TriggerFiredBundle parameter but where/how do I wire that? And where/how do I create or wire concrete Job?

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• Creating Instance of a DataContract Class on the client side

  - by hgulyan

  I'm not sure, if it's right to do this, but I'd like to ask this question again ( http://stackoverflow.com/questions/2498644/creating-instance-of-a-service-side-datacontract-class-on-client-side-in-wcf ). The main question is - why there's difference between creating instance on the client side and creating it on the server side? Why there're some properties, that lose their values when you create them on the client side and pass it to service's functions? What could be the issue? Any version will be appreciated. I've written about my problem in the update part of the question in that link. Thank You. p.s. If this is against the rules, I'll delete it.

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• How do I check for a tag's existence in a post in Wordpress?

  - by Sean

  Hey all, Quick question about Wordpress PHP: I am writing a theme and I want to display (on the main index page) one icon if my post has one tag, and another if it has the other. I wrote something like <?php has_tag('pc') { ?><img src="<?php bloginfo('template_directory'); ?>/images/pc-icon.gif"><?php }; ?> <?php has_tag('mb') { ?><img src="<?php bloginfo('template_directory'); ?>/images/mb-icon.gif"><?php }; ?> But it gives me an error. Can anybody help? Thanks

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• Naming a typedef for a boost::shared_ptr<const Foo>

  - by Blair Zajac

  Silly question, but say you have class Foo: class Foo { public: typedef boost::shared_ptr<Foo> RcPtr; void non_const_method() {} void const_method() const {} }; Having a const Foo::RcPtr doesn't prevent non-const methods from being invoked on the class, the following will compile: #include <boost/shared_ptr.hpp> int main() { const Foo::RcPtr const_foo_ptr(new Foo); const_foo_ptr->non_const_method(); const_foo_ptr->const_method(); return 0; } But naming a typedef ConstRcPtr implies, to me, that the typedef would be typedef const boost::shared_ptr<Foo> ConstRcPtr; which is not what I'm interested in. An odder name, but maybe more accurate, is RcPtrConst: typedef boost::shared_ptr<const Foo> RcPtrConst; However, Googling for RcPtrConst gets zero hits, so people don't use this as a typedef name :) Does anyone have any other suggestions?

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• Suppressing default anchor behavior in Safari with jQuery

  - by Macy Abbey

  Hello, I am attempting to prevent default anchor behavior in Safari using the jQuery library. Unfortunately, the standard techniques of returning false or using event.preventDefault() do not seem to be working in Safari. Could anyone help me with this issue? The code I'm working with is like this: $('#main .green-tabs a').live("click",function(event){ $('.green-tabs a').removeClass('active'); $(this).addClass('active'); event.preventDefault(); var that = this; return LolPage(event,that);});

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• Ruby: Is there a better way to iterate over multiple (big) files?

  - by zxcvbnm

  Here's what I'm doing (sorry for the variable names, I'm not using those in my code): File.open("out_file_1.txt", "w") do |out_1| File.open("out_file_2.txt", "w") do |out_2| File.open_and_process("in_file_1.txt", "r") do |in_1| File.open_and_process("in_file_2.txt", "r") do |in_2| while line_1 = in_1.gets do line_2 = in_2.gets #input files have the same number of lines #process data and output to files end end end end end The open_and_process method is just to open the file and close it once it's done. It's taken from the pickaxe book. Anyway, the main problem is that the code is nested too deeply. I can't load all the files' contents into memory, so I have to iterate line by line. Is there a better way to do this? Or at least prettify it?

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• Processing files with C# in folders whose names contain spaces

  - by Nigel Ainscoe

  There are plenty of C# samples that show how to manipulate files and directories but they inevitably use folder paths that contain no spaces. In the real world I need to be able to process files in folders with names that contain spaces. I have written the code below which shows how I have solved the problem. However it doesn't seem to be very elegant and I wonder if anyone has a better way. class Program { static void Main(string[] args) { var dirPath = @args[0] + "\\"; string[] myFiles = Directory.GetFiles(dirPath, "*txt"); foreach (var oldFile in myFiles) { string newFile = dirPath + "New " + Path.GetFileName(oldFile); File.Move(oldFile, newFile); } Console.ReadKey(); } } Regards, Nigel Ainscoe

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• How to remove animation glitch ?

  - by hib

  Hi all , I am downloading and then parsing some data on separate thread and then updating my ui on main thread with the following code but in this scenario I am getting animation "glitch" . I have read this word somewhere . - (void)didFinishParsing2:(NSArray *)appList { [self performSelectorOnMainThread:@selector(handleLoadedApps2:) withObject:appList waitUntilDone:NO]; self.queue = nil; // we are finished with the queue and our ParseOperation } - (void)handleLoadedApps2:(NSArray *)loadedApps{ [activityLabel removeFromSuperview]; self.controller.MyArray = (MyClass *)[arrMyArray objectAtIndex:0]; [[MySharedClass sharedSource].detailSource setObject:self.controller.MyArray forKey:someObject]; self.controller.hidesBottomBarWhenPushed = YES; isPushed = YES; [[self navigationController] pushViewController:self.controller animated:YES]; } Can anyone tell me what I am doing wrong so that I can remove the animation glitch .

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• error with gtkmm 3 in ubuntu 12.04

  - by Grohiik

  i install libgtkmm-3.0-dev in ubuntu 12.04 and i try to learn and write program with c++ and gtkmm 3 i go to this link "http://developer.gnome.org/gtkmm-tutorial/unstable/sec-basics-simple-example.html.en" and try to compile simple example program : #include <gtkmm.h> int main(int argc, char *argv[]) { Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.examples.base"); Gtk::ApplicationWindow window; return app->run(window); } my file name is "basic.cc" and i open terminal and type following command to compile: g++ basic.cc -o basic `pkg-config gtkmm-3.0 --cflags --libs` compile completed without any error but when i try to run program with type ./basic in terminal i get following error : ~$ ./simple ./simple: symbol lookup error: ./simple: undefined symbol:_ZN3Gtk11Application6createERiRPPcRKN4Glib7ustringEN3Gio16ApplicationFlagsE ~$ how can i solve this problem ? i can cimpile any gtkmm 2.4 code with this command : " g++ basic.cc -o basic pkg-config gtkmm-3.0 --cflags --libs " and this command : " g++ basic.cc -o basic pkg-config gtkmm-2.4 --cflags --libs " thanks

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• UITableView gives empty table, does not load data

  - by Alex L

  Hi, Everything works fine when the view that holds my table is the main (first) view. However, when it's not the first view and I switch into that view, my table does not load data and I get an empty table. Using NSLog I can tell that the program is not invoking numberOfRowsInSection and cellForRowAtIndexPath. I have <UITableViewDataSource, UITableViewDelegate>, IBOutlet UITableview *tableView all declared. They are also connected in the InterfaceBuilder. I tried using viewWillAppear and [tableView reloadData] but that did not help. I'm new to iPhone development and your help is appreciated!

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• questions about multi threading for sockets/tcp-connections.

  - by Fantastic Fourier

  I have a server that connects to multiple clients using TCP/IP connections, using C in Unix. Since it won't have more than 20 connections at a time, I figured I would use a thread per connection/socket. But the problem is writing to the sockets as I'll be sending user prompted msgs to clients. Once each socket is handled by a thread, how do I interact with the created thread to write to the sockets? Should each thread just read from the sockets and I'll write to sockets in the main program? Not sure if that's a good way to go about it.

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• Use modrewrite to redirect a url with querystring

  - by Alex

  I am trying to redirect an old URL that uses a query string to the new url that does not.. /tripinfo.cfm?RiverNameID=1&AdventureID=6 Now needs to go to /trips/big-ass-river/overnight.html So I am trying.. RewriteRule ^tripinfo.cfm?RiverNameID=1&AdventureID=6$ /trips/big-ass-river/overnight.html [R=301] But this is not working. . I can redirect the main page no problem using RewriteRule ^tripinfo.cfm$ /trips.html [R=301] If any one could tell me what Im missing that would be great.

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• Invoke webservice using jaxws when the wsdl has more than one service

  - by Hugo Palma

  I'm trying to get hold of the FindService on this wsdl using jaxws. I generated the classes just fine using wsimport. But when i do: FindService findService = new FindService(); i get the exception: Exception in thread "main" javax.xml.ws.WebServiceException: {http://s.mappoint.net/mappoint-30/}FindService is not a valid service. Valid services are: {http://s.mappoint.net/mappoint-30/}CommonService So, it seems that jaxws is only finding CommonService in the wsdl which is the first one declared in it. Any idea how i can use the FindService ? Thanks.

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• Using jquery with nested masterpages

  - by diver-d

  Hi everyone, Can anyone show me how to use jquery in an asp.net nested masterpage. I have my main masterpage where I have added the link to the jquery libaray and also the validation framework. I have then created another masterpage with some styling and created a aspx page based on that masterpage. How can I attach the validation framework to textboxes within my page? I have tried $("#aspnetForm").validate({ rules: { <%=txtPostCode.UniqueID %>: { minlength: 2, required: true }, <%=txtContactEmail.UniqueID %>: { required: true, email:true } }, messages: { <%=txtPostCode.UniqueID %>:{ required: "* Required Field *", minlength: "* Please enter atleast 2 characters *" } } }); However nothing happens. Can anyone point me in the right direction?

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