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• Computationally intensive scala process using actors hangs uncooperatively

  - by Chick Markley

  I have a computationally intensive scala application that hangs. By hangs I means it is sitting in the process stack using 1% CPU but does not respond to kill -QUIT nor can it be attached via jdb attach. Runs 2-12 hours at 800-900% CPU before it gets stuck The application is using ~10 scala.actors. Until now I have had great success with kill -QUIT but I am bit stumped as to how to proceed. The actors write a fair amount to stdout using println which is redirected to a text file but has not been helpful so far diagnostically. I am just hoping there is some obvious technique when kill -QUIT fails that I am ignorant of. Or just confirmation that having multiple actors println asynchronously is a real bad idea (though I've been doing it for a long time only recently with these results) Details scala 2.8.1 & 2.8.0 mac osx 10.6.5 java version "1.6.0_22" Thanks

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• Rendering a variable with erb.

  - by TZer0

  I've got the following problem: I have rhtml (html minced together with ruby inside <% % and <%= % tags) stored in a database which I want to render. The information is acquired through a query. I need to be able to evaluate the information I get from the database as though as it was normal content inside the .erb-file. What I currently have: <% @mymods.each do |mod| %> <%= render_text(mod["html"])%> <% end %> Where mod["html"] is the variable containing the rhtml-code and @mymods an array of objects from the query. I have currently no idea what function I should use (render_text does, of course, not work). Help is greatly appreciated. /TZer0

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• .NET Setup Package Installer

  - by Duncan

  Hi, I have a .NET 3.5 Setup Package Project which installs my application successfully. The setup package deploys a number (around 70) custom files for use from within the application. From time to time I have the requirement of deleting some of these files, however upon restarting the executable, it automatically runs a portion of the Setup MSI again, and re-installs these files. The only way I can achieve my desired result at the moment is to delete the files after starting the executable. I have looked through the attributes on the files in the setup package such as Vital and PackageAs, however cannot seem to identify the required setting to achieve this. Does anybody have any idea what is needed to acheive this ? Much thanks

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• Subversion: Ignore a Directory in the Repo on Commit

  - by Charles

  I have all the boost header files in this repository and when I do a check in it takes a really long time to scan all those files that will never change. Because I want users that checkout the project to be able to compile without installing boost I am in a pickle. I want to checkout everything, and then ignore updates (there will never be any) on a directory. Tortoise svn has a ignore-on-commit change list, but I cannot find anyway to add an entire directory to this list, and I do not fancy the idea of 'modifying' all the boost files so I can add them to this change list. Is there a simple solution?

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• Java - Creating a Compiler Help

  - by Brian

  So for my programming class we have had a project to create a virtual machine including a memory unit, cpu, Input, Output, Instruction Register, Program Counter, MAR, MDR and so on. Now we need to create a compiler using Java Code that will take a .exe file written in some txt editor and convert it to java byte code and run the code. The code we will be writing in the .exe file is machine code along the lines of: IN X IN Y ADD X STO Y OUT Y STOP DC X 0 DC Y 0 I am just a beginner and only have 2 days to write this and am very lost and have no idea where to start....Any Help will be much appreciated. Thanks

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• Android ScrollView issue

  - by Salman

  Guys, We are trying to make a board with sticky notes. We have used ScrollView in which we have LinearLayout. We have four columns. If there are more than 3 notes in one column, scrollview comes up. Issue is, if I try to move Row 5 column 1 note to Row 1 Column 2, scroll views hides all the notes. If we scroll to top of the board, notes become visible again. Any idea what's the issue ? Thanks Salman

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• Attach fancybox/lightbox/idontknowbox function on an element

  - by tanathos

  I'm developing a jquery gallery, and I want to parametrize the highlighter function to support any kind of lightboxes (fancybox for example). In my defaults I did something like: $.fn.mygallery.defaults = { functionHighlighter: null } so in the code, creating the item, I'll check this property, and if it's setted to a function, I want to call it on the element: if ((typeof opt.functionHighlighter) === "function") { opt.functionHighlighter.call(link); } where link is the anchor element containing the miniature image, with href setted to the original image. In my idea, when the plugin is called, I set the function with: $("#gallery").mygallery({ functionHighlighter: $.fancybox }); but the "call" on the functionHighlighter executes directly the fancybox, that returns an empty area. What I want to emulate is the execution of link.fancybox(); that correctly builds the plugin on link. Any ideas?

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• MySQL - ERROR 1045 - Access denied

  - by Abs

  In some way I have managed to get this error when I try to access into MySQL via the command line: [root@localhost ~]# mysql -u root -p Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) I have tried resetting the password without any luck using this HowTo. I have uninstalled mysql completley and reinstalled but I still get asked for a password. I have no idea why this is the case! Can someone please help me get a default install of MySQL. Environment Fedora Core 10, Full Root Access, Apache and PHP installed Thank you for any help!! EDIT To all those that would like to save themselves a few hours of "blood coughing" - when you uninstall MySQl completely delete everything that is left behind. If you don't do this, it will never be a FRESH install.

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• C# Design Layout/Patterns

  - by wpfwannabe

  I am still fairly new to C# and I am trying to decide the best way to structure a new program. Here is what I want to do and I would like feed back on my idea. Presentation Layer Business Layer (Separate Class Library) Data Layer (Separate Class Library) Model Layer (Separate Class Library) What I am struggling with is if it is ok to have the classes in the Data Layer and Business Layer inherit from the types I define in Model Layer. This way I can extended the types as needed in my Business Layer with any new properties I see fit. I might not use every property from the Model type in my Business Layer class but is that really a big deal? If this isn't clear enough I can try and put together an example.

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• firefox component doesn't seem to be loading

  - by neubert

  https://github.com/terrafrost/firefox-x-forwarded-for-spoofer That's an addon I'm trying to revive that's not working in the latest version of Firefox and I'm trying to find out why. Near as I can tell the component isn't working and I've no idea as to why. I've tried making the chrome.manifest file read as follows: content x-forwarded-for chrome/content/ overlay chrome://browser/content/browser.xul chrome://x-forwarded-for/content/overlay.xul locale x-forwarded-for en-US chrome/locale/en-US/ component ec8030f7-c20a-464f-9b0e-13a3a9e97384 components/x-forwarded-for.js contract @[email protected]/x-forwarded-for.js;1 ec8030f7-c20a-464f-9b0e-13a3a9e97384 I've also tried @frostjedi.com/x-forwarded-for;1 (which is what x-forwarded-for.js has as the contract id but that didn't help) to no avail. Any ideas?

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• Oracle global lock across process

  - by Jimm

  I would like to synchronize access to a particular insert. Hence, if multiple applications execute this "one" insert, the inserts should happen one at a time. The reason behind synchronization is that there should only be ONE instance of this entity. If multiple applications try to insert the same entity,only one should succeed and others should fail. One option considered was to create a composite unique key, that would uniquely identify the entity and rely on unique constraint. For some reasons, the dba department rejected this idea. Other option that came to my mind was to create a stored proc for the insert and if the stored proc can obtain a global lock, then multiple applications invoking the same stored proc, though in their seperate database sessions, it is expected that the stored proc can obtain a global lock and hence serialize the inserts. My question is it possible to for a stored proc in oracle version 10/11, to obtain such a lock and any pointers to documentation would be helpful.

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• Text message (SMS) verification for signups

  - by Unknown

  I have seen a disturbing trend where websites are starting to require verification sent to cellphones by text message (SMS). Gmail and Facebook are two of them. What I want to know are the following: Is it a good idea to start requiring cellphones instead of emails now? How do I do it on my own website? Edit Here are some of my new questions on the topic in response to the answers: I see that most of you are saying that SMS registrations is ok. But what about the people who don't have cell phones? And why is it accepted to give out your cell phone information freely? Do those big providers really pay per message to a gateway service? Is it not possible to set up a server with the correct SMS software, or at least buy a subscription directly instead of having a middleman?

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• QScrollBar Snap to value

  - by j3frea

  Hi all, I'm wanting to implement a scroll bar that snaps to particular values (like windows can snap to the edge of a screen). The idea is that as I drag the scrollbar down it snaps the bar to values as it approaches them. My scenario is displaying 3 chapters of text. I would like to be able to snap to the beginning or end of a chapter. Of course, to go to the start of the first chapter the scrollbar one can just scroll to the top and likewise with the end of the third chapter. So I'd like to draw two lines on the scrollbar to represent the start of the second and third chapters and then have the top and bottom of the scrollbar snap to those lines. So I'm really actually wanting to use this within a QTextBrowser but I can control a QTextBrowser with a "QSnapScrollBar" I just don't really know where to start. Any help would be greatly appreciated.

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• sending email templates in with django

  - by Anakin

  hey, i wanna send emails in html template like this. <html> <body> hello <strong>{{username}}</strong> your account activated. <img src="mysite.com/logo.gif" /> </body> it means, i want to send fully html powered templates, with django datas. i cant find anything about send_mail, and django-mailer only sends html templates, not with dynamic datas? any idea about html emails ? thanks.

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• How to study programming with C language

  - by gurugio

  I am using only C for 5 years. So I am sure that I know C grammer, but I have no idea how to advance programming skills. There are many books for modern languages (such as C++, Java) to study programming skills like the refactoring or pattern, software architecture. But no book is written with C language. The book author say that his/her book is not language-dependent, but I don't think so. How can I advance my programming skills? I have to study modern language and read the books? Are there books about software design or programming skill written with C?

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• Logging from multiple apps/processes to a single log file

  - by Andrew

  Our app servers (weblogic) all use log4j to log to the same file on a network share. On top of this we have all web apps in a managed server logging errors to a common error.log. I can't imagine this is a good idea but wanted to hear from some pros. I know that each web app has its own classloader, so any thread synchronization only occurs within the app. So what happens when multiple processes start converging on a single log file? Can we expect interspersed log statements? Performance problems? What about multiple web apps logging to a common log file? The environment is Solaris.

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• Jasper Reports - Add one day to a Date Parameter

  - by Templar

  I'm creating a Jasper report that includes the following parameters: DATESTART (Date) DATEEND (Date) These parameters indicate a date range for a field called DATECREATED (Timestamp) which includes times. I would like the date range to be INCLUSIVE, that is, if I filter for "Jan 1, 2009" to "Jan 31, 2009", any DATECREATED value on Jan 31, 2009 (such as "Jan 31, 2009 15:00") will be included in the report. When I used Crystal Reports in the past, I used the DATEADD function to create a filter expression like the following: {DATECREATED} >= {DATESTART} and {DATECREATED} < DATEADD("d", 1, {DATEEND}) (I realize that this isn't syntactically correct, but you get the idea.) Is there any way to do something similar in Jasper Reports?

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• ora-00939 error in reporting services, SSRS

  - by san

  Hi, I have an SSRS report , Oracle is my backend and am using this following query for dataset of my second parameter. select distinct X from v_stf_sec_user_staffing_center usc where usc.center_group_id in ( select distinct center_group_id from V_T_STAFFING_CENTER_GROUP scg where INSTR(','||REPLACE(:PI_REGION_LIST,' ')||',', ','||scg.group_abbreviation||',') 0) and usc.nt_user_name=:PI_NT_USER_NAME Here PI_REGION_LIST is a multivalued parameter of string type. and PI_NT_USER_NAME is a default string valued parameter this query works fine when i try to execute in manulally in the Data tab , also in the Oracle tool. But when i run the report in SSRS and select more than 3 values for the parameter PI_REGION_LIST the report throws an error on this dataset, ora-00939 error,too many arguments for function. I am not able to figure out the error here. Please help me with an idea. Thanks in advance, Suni.

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• Load data from CSV to mySQL database Java+hibernate+spring

  - by mona

  I am trying to load a CSV file in to mySQL database using Java+Hibernate+Spring. I am using the following query in the DAO to help me load in to the database: entityManager.createQuery("LOAD DATA INFILE :fileName INTO TABLE test").setParameter("fileName", "C:\\samples\\test\\abcd.csv").executeUpdate(); I got some idea to use this from http://dev.mysql.com/doc/refman/5.1/en/load-data.html and how to import a csv file into a mysql from an hibernate+spring application? But I am getting the error: java.lang.IllegalArgumentException: node to traverse cannot be null! Please help! Thanks

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• Abstract class over Interfaces in ADO.Net Environment

  - by Amit Ranjan

  I am developing a web app but is not satisfied with is architecture that I am following. The architecture is plain old conventional 3 tier architecture. What i want is follow some design pattern or architecture that will be help me in decoupling my code. I have idea about MVC and MVP architectures for Web App but i need different from that. I want to use OOPS concepts using abstract classes and interfaces, polymorphism etc in my app but not MVC and MVP. I dont know why? I havent tried any ado.net application earlier via abstract class or interfaces, so i need your help. Thanks

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• How to represent double values as circles in a 2d matrix in java

  - by marco

  Hello, so I want to write a matrix explorer which enables me to reorder rows and columns of a matrix. For this porpouse I used the Jtable class. Now the problem that I have is that it is very difficult to reorder a matrix by looking at double values, so I would like to print the matrix not with the double values but with circles in which the radius of the circle represents the value. So that I can tell the difference between big values and small values quicker. Anybody has any idea how I can turn this double values into filled circles with JTable or any table class for that matter?

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• Help with Event-Based Components

  - by Joel in Gö

  I have started to look at Event-Based Components (EBCs), a programming method currently being explored by Ralf Wesphal in Germany, in particular. This is a really interesting and promising way to architect a software solution, and gets close to the age-old idea of being able to stick software components together like Lego :) A good starting point is the Channel 9 video here, and there is a fair bit of discussion in German at the Google Group on EBCs. I am however looking for more concrete examples - while the ideas look great, I am finding it hard to translate them into real code for anything more than a trivial project. Does anyone know of any good code examples (in C# preferably), or any more good sites where EBCs are discussed?

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• python sax error "junk after document element"

  - by user293487

  Hi, I use python sax to parse xml file. The xml file is actually a combination of multiple xml files. It looks like as follows: <row name="abc" age="40" body="blalalala..." creationdate="03/10/10" /> <row name="bcd" age="50" body="blalalala..." creationdate="03/10/09" /> My python code is in the following. It show "junk after document element" error. Any good idea to solve this problem. Thanks. from xml.sax.handler import ContentHandler from xml.sax import make_parser,SAXException import sys class PostHandler (ContentHandler): def __init__(self): self.find = 0 self.buffer = '' self.mapping={} def startElement(self,name,attrs): if name == 'row': self.find = 1 self.body = attrs["body"] print attrs["body"] def character(self,data): if self.find==1: self.buffer+=data def endElement(self,name): if self.find == 1: self.mapping[self.body] = self.buffer print self.mapping parser = make_parser() handler = PostHandler() parser.setContentHandler(handler) try: parser.parse(open("2.xml")) except SAXException:

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• clearing cin input? cin.ignore not a good way?

  - by igor

  What's a better way to clear cin input? I thought cin.clear and cin.ignore was a good way...? code: void clearInput() { cin.clear(); cin.ignore(1000,'\n'); //cin.ignore( std::numeric_limits<streamsize>::max(), '\n' ); } My teacher gave me this reply... this is basically saying that your clearInput doesn't work FYI: ignore is NEVER a good idea as a way of getting rid of all that remains on a line and your failing this test is exactly the reason why now go clear it the correct way

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• Reading out all actions in a Grails-Controller

  - by kenan

  Hi, i need to read out all available actions from any controller in my web-app. The reason for this is an authorization system where i need to give users a list of allowed actions. E.g.: User xyz has the authorization for executing the actions show, list, search. User admin has the authorization for executing the actions edit, delete etc. I need to read out all actions from a controller. Does anyone has an idea? Thx for any help! kenan

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