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• Load only some columns with Hibernate native SQL queries

  - by Alessandro Dionisi

  I have a table on the database and I want to load only some columns from the result set. I defined a native sql query in the hbm file: <sql-query name="query"> <return alias="r" class="RawData"/> <![CDATA[ SELECT DESCRIPTION as {r.description} FROM RAWD_RAWDATAS r WHERE r.RAWDATA_ID=? ]]> </sql-query> This query however fails with error: could not read column value from result set: RAWDATA1_14_0_; Invalid column name SQL Error: 17006, SQLState: null, because Hibernate tries to load all fields from the result set. I found also a bug in Hibernate JIRA (http://opensource.atlassian.com/projects/hibernate/browse/HHH-3035). Anyone knows how to accomplish this task with a workaround?

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• What's the most efficient way to repeatedly remove leading text using Vim?

  - by John Topley

  What's the most efficient way to remove the text 2010-04-07 14:25:50,773 DEBUG This is a debug log statement - from a log file like the extract below using Vim? 2010-04-07 14:25:50,772 DEBUG This is a debug log statement - 9,8 2010-04-07 14:25:50,772 DEBUG This is a debug log statement - 1,11 2010-04-07 14:25:50,772 DEBUG This is a debug log statement - 5,2 2010-04-07 14:25:50,772 DEBUG This is a debug log statement - 8,4 This is what the result should look like: 9,8 1,11 5,2 8,4 Note that on this occasion I'm using gVim on Windows, so please don't suggest any UNIX programs which may be better suited to the task—I have to do it using Vim.

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• Java technologies for web-development.

  - by Alex

  Hello. I'm PHP-programmer, but I'm extremely interested in learning Java. So I decided to change speciality from PHP to Java. At the moment I have an opportunity to try to make quite simple web-application (it should contain 2-3 forms, several pages with information from the database and authorization module) and also I have a chance to choose any technology I want. Besides I have about 3 months for this task. I've decided to develop site with Java technologies for the purpose of studying. I've already read a book about Java ("Java2 Complete Reference" by P.Naughton) and currently I'm reading "Thinking in Java" by B.Eckel. I clearly understand it's not enough for efficient development, but I want, at least, to try. I would be very appreciated for the advises, which framework (for example) or technology to choose (Spring, Grails etc.) and what primary aspects and technologies of Java should I pay attention to? Thank you in advance.

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• IDLE wont start Python 2.6.5

  - by anteater7171

  I was using it as my primary text editor for quite sometime. However, one day it just stopped working. This had happened to me several times before, so I simply tried to end all procceses using windows task manager. However that didn't work. I've recently tried getting it to work again. Whenever I try to reopen it it informs me that it's subprocess couldn't connect. I tried uninstalling it and reinstalling it, yet the problem persists. Anyone have any other solutions? Important facts: Windows 7, Python 2.6.5

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• How to provide global functionality in multi-user database app

  - by Mike B

  I have been building a multi-user database application (in C#/WPF 4.0) that manages tasks for all employees of a company. I now need to add some functionality such as sending an email reminder to someone when a critical task is due. How should this be done? Obviously I don’t want every instance of the program to be performing this function (Heh each user would get 10+ emails). Should I add the capability to the application as a "Mode" and then run a copy on the database server in this mode or would it be better to create a new app altogether to perform "Global" type tasks? Is there a better way?

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• Hudson results one step behind

  - by kaerast

  I'm using the filesytem plugin for Hudson, and when a build happens it looks for new/modified files, copies them to the Workspace, runs tests using Rake, and then publishes those junit xml result files. However, the updated junit xml result files don't get pushed to the workspace until the next build. This means that when the publishing of the junit xml result files happens, it's always one step behind. And this means I need to run a build twice before the results show. The Rake task is creating the junit xml files in the project directory. I've tried outputting to the workspace directory, but it seems to make things worse and the results don't get published at all. Am I doing something fundamentally wrong here? Is there a simple way of getting those junit xml results pushed to the workspace so that the post-build "Publish JUnit test result report" actually runs against the newly created xml files?

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• What should I know about Python to identify comments in different source files?

  - by Can't Tell

  I have a need to identify comments in different kinds of source files in a given directory. ( For example java,XML, JavaScript, bash). I have decided to do this using Python (as an attempt to learn Python). The questions I have are 1) What should I know about python to get this done? ( I have an idea that Regular Expressions will be useful but are there alternatives/other modules that will be useful? Libraries that I can use to get this done?) 2) Is Python a good choice for such a task? Will some other language make this easier to accomplish?

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• How can I implement a download rate limited in Java?

  - by JohnWithoutArms

  Hello, I'm going to implement a (simple) downloader application in Java as a personal exercise. It is going to run several jobs in different threads, in a way that I will be downloading a few files at the same time at all times during execution. I want to be able to define a download rate limit that is shared between all the download jobs, but I don't know how to do it even for a single download task. How should I go about doing this? What are the solutions I should try implementing? Thanks.

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• Sharing a fabfile across multiple projects

  - by Matthew Rankin

  Fabric has become my deployment tool of choice both for deploying Django projects and for initially configuring Ubuntu slices. However, my current workflow with Fabric isn't very DRY, as I find myself: copying the fabfile.py from one Django project to another and modifying the fabfile.py as needed for each project (e.g., changing the webserver_restart task from Apache to Nginx, configuring the host and SSH port, etc.). One advantage of this workflow is that the fabfile.py becomes part of my Git repository, so between the fabfile.py and the pip requirements.txt, I have a recreateable virtualenv and deployment process. I want to keep this advantage, while becoming more DRY. It seems that I could improve my workflow by: being able to pip install the common tasks defined in the fabfile.py and having a fab_config file containing the host configuration information for each project and overriding any tasks as needed Any recommendations on how to increase the DRYness of my Fabric workflow?

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• Configuring log4j at runtime

  - by Neil

  I'm using org.apache.tools.ant.listener.Log4jListener to manage logging with my ant script. The ant script is highly configurable and designed to be run different ways with different parameters and therefore I need to be able to log to files specified at runtime. I have a log4j.properties which specifies a log file to be build.log, and despite my attempts to launch ant redefining properties defined in log4j.properties have been unsuccessful. The build ignores them and continues to write to build.log. I haven't found much support regarding writing to custom files unless it's in Java with their Logger class. Perhaps I'm thinking this through wrong. log4j.properties isn't treated in the same way as a property file in an ant script (hence overrideable from the command line)? Is there a way I can do this intelligently without writing a custom task or something?

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• Sharing state/changes across ViewModels

  - by joshperry

  I have an App which has a Tasks tab and a Projects tab. I decided to make a separate ViewModel for each of the tabs, TasksViewModel and ProjectsViewModel. The Tasks tab has a new task area with an associated project pulldown and the Projects tab (obviously) has a list of projects. What I'd like is for the pulldown on the Tasks tab to share the same collection as the Projects tab list so that any time I add or remove a project on the Projects tab the list on the Tasks tab is up to date automatically. This worked well with a single ViewModel but it was beginning to become quite unruly. Should I not have split into two ViewModels? Is there a common method of sharing data like this? Perhaps pass the same ObservableCollection<Project> into each of the ViewModels? Perhaps some type of notification back to the TasksViewModel along the lines of ICollectionChanged. Appreciate any insight/input!

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• Get previous element in IObservable without re-evaluating the sequence

  - by dcstraw

  In an IObservable sequence (in Reactive Extensions for .NET), I'd like to get the value of the previous and current elements so that I can compare them. I found an example online similar to below which accomplishes the task: sequence.Zip(sequence.Skip(1), (prev, cur) => new { Previous = prev, Current = cur }) It works fine except that it evaluates the sequence twice, which I would like to avoid. You can see that it is being evaluated twice with this code: var debugSequence = sequence.Do(item => Debug.WriteLine("Retrieved an element from sequence")); debugSequence.Zip(debugSequence.Skip(1), (prev, cur) => new { Previous = prev, Current = cur }).Subscribe(); The output shows twice as many of the debug lines as there are elements in the sequence. I understand why this happens, but so far I haven't found an alternative that doesn't evaluate the sequence twice. How can I combine the previous and current with only one sequence evaluation?

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• Why can't there be an "ultimate" programming language? [closed]

  - by sub

  There is an uncountable sum of programming languages out there. They obviously all have their pro's and con's - but why can't there be one to "beat them all"? The main part of a programming language is it's syntax and what's possible with it. The rest are usually only a bunch of libraries, frameworks and extensions wrapped around it. So couldn't you combine all the great aspects and experiences gained from the thousands of programming languages out there to build one with a syntax that fits every task? Wouldn't it be better having only one programming language? I see only problems with the current amount of the ones in use. Why can't there be a perfect language when thinking of syntax, constructs and typing?

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• Examples of both beautiful and ugly java code?

  - by tputkonen

  I would like to demonstrate how difficult it is for a layman to identify high quality code from flawed code. I'm thinking of doing this with the help of two java methods. Both of the methods should look like they do the same, pretty simple thing. However one of them should have several kind of flaws, for example: iteration with array off by one error string concatenations causing lots of objects to be created (as opposed to StringBuffer in the "good" code, which looks more complicated) possibly null pointer exception (but it should not be trivial to spot) Those are just some examples, all kinds of other issues including bugs and performance related structures are highly appreciated. Methods should be around 10-20 lines of length, and the task they do should be something simple - preferably printing something in an iteration.

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• Stored procedure and trigger

  - by noober

  Hello all, I had a task -- to create update trigger, that works on real table data change (not just update with the same values). For that purpose I had created copy table then began to compare updated rows with the old copied ones. When trigger completes, it's neccessary to actualize the copy: UPDATE CopyTable SET id = s.id, -- many, many fields FROM MainTable s WHERE s.id IN (SELECT [id] FROM INSERTED) AND CopyTable.id = s.id; I don't like to have this ugly code in trigger anymore, so I has extracted it to a stored procedure: CREATE PROCEDURE UpdateCopy AS BEGIN UPDATE CopyTable SET id = s.id, -- many, many fields FROM MainTable s WHERE s.id IN (SELECT [id] FROM INSERTED) AND CopyTable.id = s.id; END The result is -- Invalid object name 'INSERTED'. How can I workaround this? Regards,

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• Test plans and how best to write them

  - by Karim

  We're trying to figure out the best way to write tests in our test plan. Specifically, when writing a test that is meant to be used by anyone including QA staff, should the steps in the test be very specific or more broad giving the tester more leeway in how the task can be accomplished. As a very simple example, if you're testing opening a document in word processing document, should the test read: Using the mouse, open the file menu Choose "Open File..." in the file menu In the open file dialog that appears, navigate to x and double-click the document called y OR Bring up the file open dialog Open the file y Now I realize one answer is probably going to be "it depends on what you're trying to test" but I'm trying to answer a broader question here: If the test steps are too specific do we risk a) making the testing process to laborious and tedious and more importantly b) do we risk missing something because we wrote down too specific a path to achieve a goal. Alternatively, if we make it broad do we depend too much on the whims of the tester at the time and lose crucial testing of paths that are more common to customers/clients?

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• is there a way to use cin.getline() without having to define a char array size before hand?

  - by zebraman

  Basically my task is having to sort a bunch of strings of variable length ignoring case. I understand there is a function strcasecmp() that compares cstrings, but doesn't work on strings. Right now I'm using getline() for strings so I can just read in the strings one line at a time. I add these to a vector of strings, then convert to cstrings for each call of strcasecmp(). Instead of having to convert each string to a cstring before comparing with strcasecmp(), I was wondering if there was a way I could use cin.getline() for cstrings without having a predefined char array size. Or, would the best solution be to just read in string, convert to cstring, store in vector, then sort?

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• Java Swing - How to access a JComponent of one JPanel from other JPanel, both added to the JFrame?

  - by Yatendra Goel

  I am developing a Java Desktop Application with GUI implemented in SWING. I hava a JFrame. I have added three JPanels on that. One JPanel panel1 has a Start Button. Now I want to disable various componets on other JPanels when a user presses the start button on the panel1. Now how can I access the components of those other panels from panel1. I know that one approach is to first get the container of panel1 panel1.getParent(); Then get the components of the container container.getComponents(); and use them as per need. Q1. Is there any other way by which I can perform the same task? (I think this is the only way) Q2. After getting the components list of the container, how to differentiate one container with other?

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• Add progressbar to BZip2CompressorInputStream

  - by bordeux

  This is my code: public void extract(String input_f, String output_f){ int buffersize = 1024; FileInputStream in; try { in = new FileInputStream(input_f); FileOutputStream out = new FileOutputStream(output_f); BZip2CompressorInputStream bzIn = new BZip2CompressorInputStream(in); final byte[] buffer = new byte[buffersize]; int n = 0; while (-1 != (n = bzIn.read(buffer))) { out.write(buffer, 0, n); } out.close(); bzIn.close(); } catch (Exception e) { throw new Error(e.getMessage()); } } How can i add progress bar to extract task, or how can i get the compressed file size?

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• Detect if NSString contains a URL and generate a "link" to open inside the app a Safari View

  - by Cy

  I have am reading a twitter feed in my iPhone application and can do it correctly, but I'd like to evolve it in a way to detect if the whole NSString contains any URL or URLs and create a "link" that will open a UIWebView within the same application. Can you guide me on how to perform this task? -(void) setTextTwitter:(NSString *)text WithDate:(NSString*)date { [text retain]; [textTwitter release], textTwitter = nil; textTwitter = text; [date retain]; [dateTwitter release], dateTwitter = nil; dateTwitter = date; [self setNeedsDisplay]; }

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• DeferWindowPos and SWP_SHOWWINDOW/SWP_HIDEWINDOW

  - by Tom Bell

  I am writing a virtual desktop application which utilises the DeferWindowPos API functions. The current method I am using is moving the windows off the screen if they're not on the current virtual desktop. However I know wish to also hide the windows that are off-screen so they do not appear on the task bar. I have attempted this by also passing SWP_SHOWWINDOW/SWP_HIDEWINDOW to the DeferWindowPos() calls. I have read a few sites regarding this and one of them suggested that if SWP_SHOWWINDOW/SWP_HIDEWINDOW are passed, then the window will only show or hide, and no reposition. Can anyone confirm this, or am I doing something wrong?

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• Help, I need to debug my BrowserHelperObject (BHO) (in C++) after a internet explorer 8 crash in Rel

  - by BHOdevelopper

  Hi, here is the situation, i'm developping a Browser Helper Object (BHO) in C++ with Visual Studio 2008, and i learned that the memory wasn't managed the same way in Debug mode than in Release mode. So when i run my BHO in debug mode, internet explorer 8 works just fine and i got no erros at all, the browser stays alive forever, but as soon as i compile it in release mode, i got no errors, no message, nothing, but after 5 minutes i can see through the task manager that internet explorer instances are just eating memory and then the browser just stop responding every time. Please, I really need some hint on how to get a feedback on what could be the error. I heard that, often it was happening because of memory mismanagement. I need a software that just grab a memory dump or something when iexplorer crashes to help me find the problem. Any help is appreciated, I'll be looking for responses every single days, thank you.

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• How do I add jars needed to compile a maven project if they were never built with a pom?

  - by JasonH

  I'm just starting with maven, coming from years of working with Ant. I'm trying a basic task now, building a simple project that requires some libraries from a vendor. I have the jars in src\main\resources\VENDORNAME. When I run mvn compile it fails on compilation saying the libraries don't exist. I can't seem to add these as dependencies because I don't know their version number and as they are proprietary I can't find them in ibiblio or elsewhere. Without these Jars I can't compile my classes. Is there a way to use jars that didn't follow Maven's convention? I might not understand maven correctly, so any guidance is welcome. Much appreciated for any responses.

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• How to deal with callback to your UIController after your UIController unloads?

  - by erotsppa

  Suppose your controller is a table view and one of the cells you are going off to do a length task (say download a thumbnail) to be viewed in the cell. Typically you would have the network call do a callback to your controller when it is done downloading. The callback can then reload the table or do some other form of UI update (hides a spinner etc). However, what if the controller is unloaded? Say the user navigated away from this controller and it got released? What happens? Will the callback still work despite the controller now not in memory? Also, if the callback operates on some objects (say the UITableView) what happens when the controller is deallocated? I suppose the controller can release all the objects and the callback would just be calling methods on nil to prevent crash. But is this the convention?

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• How to display only selected data in combo box at run time from database?

  - by Joy1979

  I am new to .Net and I am working on one task. Below is my scenario. I have 2 tables: Table 1: Students StudentID StudentDetail 1 StudentName 2 StudentGrade Table 2: Student_data StudentDetail StudentRecords StudentName John (Default) StudentName Jacob StudentName Smith StudentGrade A (default) StudentGrade B StudentGrade C Question: When window form loads (run time) I need to display StudentRecords in combo box with StudentName = "John" and StudentGrade = "A" as default followed by other values. StudentName and StudentRecords are in Labels and values are in a ComboBox. I am using VB.Net and VS 2010 with SQL 2008r2. I would appreciate any step by step help. Apologies If my request is simple.

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