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• Should I obscure primary key values?

  - by Scott

  I'm building a web application where the front end is a highly-specialized search engine. Searching is handled at the main URL, and the user is passed off to a sub-directory when they click on a search result for a more detailed display. This hand-off is being done as a GET request with the primary key being passed in the query string. I seem to recall reading somewhere that exposing primary keys to the user was not a good idea, so I decided to implement reversible encryption. I'm starting to wonder if I'm just being paranoid. The reversible encryption (base64) is probably easily broken by anybody who cares to try, makes the URLs very ugly, and also longer than they otherwise would be. Should I just drop the encryption and send my primary keys in the clear?

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• Objective-C Memory Management: When do I [release]?

  - by Sahat

  I am still new to this Memory Management stuff (Garbage Collector took care of everything in Java), but as far as I understand if you allocate memory for an object then you have to release that memory back to the computer as soon as you are finished with your object. myObject = [Object alloc]; and [myObject release]; Right now I just have 3 parts in my Objective-C .m file: @Interface, @Implementation and main. I released my object at the end of the program next to these guys: [pool drain]; return 0; But what if this program were to be a lot more complicated, would it be okay to release myObject at the end of the program? I guess a better question would be when do I release an object's allocated memory? How do I know where to place [myObject release];?

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• How to calculate order (big O) for more complex algorithms (ie quicksort)

  - by bangoker

  I know there are quite a bunch of questions about big O notation, I have already checked Plain english explanation of Big O , Big O, how do you calculate/approximate it?, and Big O Notation Homework--Code Fragment Algorithm Analysis?, to name a few. I know by "intuition" how to calculate it for n, n^2, n! and so, however I am completely lost on how to calculate it for algorithms that are log n , n log n, n log log n and so. What I mean is, I know that Quick Sort is n log n (on average).. but, why? Same thing for merge/comb, etc. Could anybody explain me in a not to math-y way how do you calculate this? The main reason is that Im about to have a big interview and I'm pretty sure they'll ask for this kind of stuff. I have researched for a few days now, and everybody seem to have either an explanation of why bubble sort is n^2 or the (for me) unreadable explanation a la wikipedia Thanks!

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• CodePlex Daily Summary for Sunday, January 16, 2011

  CodePlex Daily Summary for Sunday, January 16, 2011Popular ReleasesVidCoder: 0.8.1: Adds ability to choose an arbitrary range (in seconds or frames) to encode. Adds ability to override the title number in the output file name when enqueing multiple titles. Updated presets: Added iPhone 4, Apple TV 2, fixed some existing presets that should have had weightp=0 or trellis=0 on them. Added {parent} option to auto-name format. Use {parent:2} to refer to a folder 2 levels above the input file. Added {title:2} option to auto-name format. Adds leading zeroes to reach the sp...Network Asset Manager: Release 1.0.9: Release notes for version 1.0.9New FeaturesAdded new report subsystem for better report handling and report history management. Added support for Network adapter discovery Added reports for low disk space, disk utilization, hardware, OS installation Some application fixes. Bug fixesArtifact ID 2979655 : Fixed issue with installed software collection on windows 64 bit. (Thanks to nielsvdc for this patch) NotesPrevious versions of NAM installations need to be manually uninstalled bef...mytrip.mvc (CMS & e-Commerce): mytrip.mvc 1.0.52.0 beta 2: New MVC3 RTM WEB.mytrip.mvc 1.0.52.0 Web for install hosting System Requirements: NET 4.0, MSSQL 2008 or MySql (auto creation table to database) if .\SQLEXPRESS auto creation database (App_Data folder) SRC.mytrip.mvc 1.0.52.0 System Requirements: Visual Studio 2010 or Web Deweloper 2010 MSSQL 2008 or MySql (auto creation table to database) if .\SQLEXPRESS auto creation database (App_Data folder) Connector/Net 6.3.5, MVC3 RTM WARNING For run and debug SRC.mytrip.mvc 1.0.52.0 download and...BloodSim: BloodSim - 1.3.3.0: NOTE: If you have a previous version of BloodSim, you must update WControls.dll from the Required DLLs download. - Removed average stats from main window as this is no longer necessary - Added ability to name a set of runs that will show up in the title bar of the graph window - Added ability to run progressive simulation sets, increasing up to 2 chosen stats by a value each time - Added option to set the amount that Death Strike heals for on the Last 5s Damage - Added option for Blood Shiel...NuGet: NuGet 1.0 RTM: NuGet is a free, open source developer focused package management system for the .NET platform intent on simplifying the process of incorporating third party libraries into a .NET application during development. This release is a Visual Studio 2010 extension and contains the the Package Manager Console and the Add Package Dialog.MVC Music Store: MVC Music Store v2.0: This is the 2.0 release of the MVC Music Store Tutorial. This tutorial is updated for ASP.NET MVC 3 and Entity Framework Code-First, and contains fixes and improvements based on feedback and common questions from previous releases. The main download, MvcMusicStore-v2.0.zip, contains everything you need to build the sample application, including A detailed tutorial document in PDF format Assets you will need to build the project, including images, a stylesheet, and a pre-populated databas...Free Silverlight & WPF Chart Control - Visifire: Visifire SL and WPF Charts v3.6.7 GA Released: Hi, Today we are releasing Visifire 3.6.7 GA with the following feature: * Inlines property has been implemented in Title. Also, this release contains fix for the following bugs: * In Column and Bar chart DataPoint’s label properties were not working as expected at real-time if marker enabled was set to true. * 3D Column and Bar chart were not rendered properly if AxisMinimum property was set in x-axis. You can download Visifire v3.6.7 here. Cheers, Team VisifireFluent Validation for .NET: 2.0: Changes since 2.0 RC Fix typo in the name of FallbackAwareResourceAccessorBuilder Fix issue #7062 - allow validator selectors to work against nullable properties with overriden names. Fix error in German localization. Better support for client-side validation messages in MVC integration. All changes since 1.3 Allow custom MVC ModelValidators to be added to the FVModelValidatorProvider Support resource provider for custom property validators through the new IResourceAccessorBuilder ...EnhSim: EnhSim 2.3.2 ALPHA: 2.3.2 ALPHAThis release supports WoW patch 4.03a at level 85 To use this release, you must have the Microsoft Visual C++ 2010 Redistributable Package installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=A7B7A05E-6DE6-4D3A-A423-37BF0912DB84 To use the GUI you must have the .NET 4.0 Framework installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=9cfb2d51-5ff4-4491-b0e5-b386f32c0992 - Quick update to ...ASP.NET MVC Project Awesome, jQuery Ajax helpers (controls): 1.6: A rich set of helpers (controls) that you can use to build highly responsive and interactive Ajax-enabled Web applications. These helpers include Autocomplete, AjaxDropdown, Lookup, Confirm Dialog, Popup Form, Popup and Pager new stuff: paging for the lookup lookup with multiselect changes: the css classes used by the framework where renamed to be more standard the lookup controller requries an item.ascx (no more ViewData["structure"]), and LookupList action renamed to Search all the...pwTools: pwTools: pwTools SVN Downloaderthe downloader contains three *.bat files pwtools-changelog.bat creates a changelog.txt file containing the change notes pwtools-binaries.bat is downloading the latest stable binary files pwtools-source.bat is downloading the latest project files (including source code and binaries)??????????: All-In-One Code Framework ??? 2011-01-12: 2011???????All-In-One Code Framework（??） 2011?1??????！！http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=1code&DownloadId=128165 ?????release?，???????ASP.NET, AJAX, WinForm, Windows Shell????13?Sample Code。???，??????????sample code。 ?????：http://blog.csdn.net/sjb5201/archive/2011/01/13/6135037.aspx ??，??????MSDN????????????。 http://social.msdn.microsoft.com/Forums/zh-CN/codezhchs/threads ?????????????????，??Email ????patterns & practices – Enterprise Library: Enterprise Library 5.0 - Extensibility Labs: This is a preview release of the Hands-on Labs to help you learn and practice different ways the Enterprise Library can be extended. Learning MapCustom exception handler (estimated time to complete: 1 hr 15 mins) Custom logging trace listener (1 hr) Custom configuration source (registry-based) (30 mins) System requirementsEnterprise Library 5.0 / Unity 2.0 installed SQL Express 2008 installed Visual Studio 2010 Pro (or better) installed AuthorsChris Tavares, Microsoft Corporation ...Orchard Project: Orchard 1.0: Orchard Release Notes Build: 1.0.20 Published: 1/12/2010 How to Install OrchardTo install Orchard using Web PI, follow these instructions: http://www.orchardproject.net/docs/Installing-Orchard.ashx Web PI will detect your hardware environment and install the application. --OR-- Alternatively, to install the release manually, download the Orchard.Web.1.0.20.zip file. http://orchardproject.net/docs/Manually-installing-Orchard-zip-file.ashx The zip contents are pre-built and ready-to-run...Umbraco CMS: Umbraco 4.6.1: The Umbraco 4.6.1 (codename JUNO) release contains many new features focusing on an improved installation experience, a number of robust developer features, and contains nearly 200 bug fixes since the 4.5.2 release. Getting Started A great place to start is with our Getting Started Guide: Getting Started Guide: http://umbraco.codeplex.com/Project/Download/FileDownload.aspx?DownloadId=197051 Make sure to check the free foundation videos on how to get started building Umbraco sites. They're ...StyleCop for ReSharper: StyleCop for ReSharper 5.1.14986.000: A considerable amount of work has gone into this release: Features: Huge focus on performance around the violation scanning subsystem: - caching added to reduce IO operations around reading and merging of settings files - caching added to reduce creation of expensive objects Users should notice condsiderable perf boost and a decrease in memory usage. Bug Fixes: - StyleCop's new ObjectBasedEnvironment object does not resolve the StyleCop installation path, thus it does not return the ...Facebook C# SDK: 4.2.1: - Authentication bug fixes - Updated Json.Net to version 4.0.0 - BREAKING CHANGE: Removed cookieSupport config setting, now automatic. This download is also availible on NuGet: Facebook FacebookWeb FacebookWebMvcHawkeye - The .Net Runtime Object Editor: Hawkeye 1.2.5: In the case you are running an x86 Windows and you installed Release 1.2.4, you should consider upgrading to this release (1.2.5) as it appears Hawkeye is broken on x86 OS. I apologize for the inconvenience, but it appears Hawkeye 1.2.4 (and probably previous versions) doesn't run on x86 Windows (See issue http://hawkeye.codeplex.com/workitem/7791). This maintenance release fixes this broken behavior. This release comes in two flavors: Hawkeye.125.N2 is the standard .NET 2 build, was compile...Phalanger - The PHP Language Compiler for the .NET Framework: 2.0 (January 2011): Another release build for daily use; it contains many new features, enhanced compatibility with latest PHP opensource applications and several issue fixes. To improve the performance of your application using MySQL, please use Managed MySQL Extension for Phalanger. Changes made within this release include following: New features available only in Phalanger. Full support of Multi-Script-Assemblies was implemented; you can build your application into several DLLs now. Deploy them separately t...AutoLoL: AutoLoL v1.5.3: A message will be displayed when there's an update available Shows a list of recent mastery files in the Editor Tab (requested by quite a few people) Updater: Update information is now scrollable Added a buton to launch AutoLoL after updating is finished Updated the UI to match that of AutoLoL Fix: Detects and resolves 'Read Only' state on Version.xmlNew ProjectsA simple grammar based intellisense for Html / JavaScript: A JavaScript library to enable intellisense based on a grammar. Example: Sentence -> Greeting | Command Greeting -> "hello" Name Name -> string Command -> "execute " commandName commandName -> "test" | "build" | "verify" Then users will be guided with suggestions as they typeAif message header editor (AMHE): The Aif message header editor allows the developer to change the Aif message-header information in the Xml-document.Arabic Controls For WP7: This project provides a few right-to-left controls and an engine to render Arabic characters for WP7 due to the partial Arabic support.ASIVeste: No description availableAzureFiddlerCore: AzureFiddlerCore allows an instance of Fiddler to be hosted in an Azure application. It will export any requests sent through its special proxies to a SAZ file stored in Azure Blob storage, for you to download. It is written in C# using FiddlerCore.Ermek CMS: CS Tournament CMS (Claims Management System).Erqilu: Erqilu WebSite.HHChat: A client-server chat program allowing users to have a list of contacts with whom they can chat either individually or in groups. Will support sending files and emoticons. Developed in C# using WPF, MVVM and WCF.MFC GraphViewer: mfc graph algorithm toolMovieStorePDT: MovieStore-PruebaDeTecnología es un proyecto donde probaremos las tecnologías de desarrollo de software (ASP.NET MVC, C#, jQuery y EF) que utilizaremos en proyectos actuales y siguientes.NLib: NLib it's a Helper Library. It's developed in C#. Documentation will coming soonOrchard Tokens Module: Tokens module for orchard.Phatnotes to Evernote Converter: Convert your Phatnotes (Version 5) to Evernote. Phatnotes is a tool that syncs notes from PC to a windows-mobile phone or IPhone. I personally switched to an Android phone, and needed to convert my Phatnotes, so I chose Evernote. Sapit - Small And Powerful Integration Toolkit: Sapit is an implementation of integration patterns and techniques. Included are Cache, Circuit Breaker, Response Time Throttle and Timeout. Apply these to your code using Aspect Oriented Programming (AOP) via Castle Windsor, PostSharp or Unity Application Block. More to come ...SimpleMVC: SimpleMVC is a lightweight .NET framework for creating applications based upon the classic Model, View and Controller concept.SMSRules: The most comprehensive SMS management tool which gives you an option to do what you always wanted to do. Some of the things which it enables you to do!! 1. Filter all the incoming messages and Move/Copy them to a folder 2. Create/Delete user folders. 3. Hide private messages. speakyourmind: A simple desktop client written in .NET that posts updates to Social Networking Sites such as Twitter and Facebook. The objective of creating this project is to learn the various social networking APIs available. (Currently only twitter support is added)String Toolkit.NET: Projeto para gerar string a partir de valores numericosTraceView Log Visualizer: TraceViewWallyMap & FindWally: Silverlight 4 and WP7 simple georeference applicationswp7 destiny: wp7 destinywp7 minesweeper: wp7 minesweeper

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• Actionscript 3 Sprite AddChild

  - by Amy

  Im new to actionscript 3 and am a little confused about how the addchild function works. I want to draw 5 houses. each house has a roof and wall. Each wall has a door and a window. I have the following classes and this is how I grouped them class Main class House class Roof //a triangle class Wall //a rectangle class Door //a rectangle class Window //a square Im having trouble with inheritance of the classes. I cant made the wall class show up with a window and a door. Can someone point me to the right direction?

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• Thread scheduling C

  - by MRP

  include <pthread.h> include <stdio.h> include <stdlib.h> #define NUM_THREADS 4 #define TCOUNT 5 #define COUNT_LIMIT 13 int done = 0; int count = 0; int thread_ids[4] = {0,1,2,3}; int thread_runtime[4] = {0,5,4,1}; pthread_mutex_t count_mutex; pthread_cond_t count_threshold_cv; void *inc_count(void *t) { int i; long my_id = (long)t; long run_time = thread_runtime[my_id]; if (my_id==2 && done ==0) { for(i=0; i< 5 ; i++) { if( i==4 ){done =1;} pthread_mutex_lock(&count_mutex); count++; if (count == COUNT_LIMIT) { pthread_cond_signal(&count_threshold_cv); printf("inc_count(): thread %ld, count = %d Threshold reached.\n", my_id, count); } printf("inc_count(): thread %ld, count = %d, unlocking mutex\n", my_id, count); pthread_mutex_unlock(&count_mutex); } } if (my_id==3 && done==1) { for(i=0; i< 4 ; i++) { if(i == 3 ){ done = 2;} pthread_mutex_lock(&count_mutex); count++; if (count == COUNT_LIMIT) { pthread_cond_signal(&count_threshold_cv); printf("inc_count(): thread %ld, count = %d Threshold reached.\n", my_id, count); } printf("inc_count(): thread %ld, count = %d, unlocking mutex\n", my_id, count); pthread_mutex_unlock(&count_mutex); } } if (my_id==4&& done == 2) { for(i=0; i< 8 ; i++) { pthread_mutex_lock(&count_mutex); count++; if (count == COUNT_LIMIT) { pthread_cond_signal(&count_threshold_cv); printf("inc_count(): thread %ld, count = %d Threshold reached.\n",my_id, count); } printf("inc_count(): thread %ld, count = %d, unlocking mutex\n", my_id, count); pthread_mutex_unlock(&count_mutex); } } pthread_exit(NULL); } void *watch_count(void *t) { long my_id = (long)t; printf("Starting watch_count(): thread %ld\n", my_id); pthread_mutex_lock(&count_mutex); if (count<COUNT_LIMIT) { pthread_cond_wait(&count_threshold_cv, &count_mutex); printf("watch_count(): thread %ld Condition signal received.\n", my_id); count += 125; printf("watch_count(): thread %ld count now = %d.\n", my_id, count); } pthread_mutex_unlock(&count_mutex); pthread_exit(NULL); } int main (int argc, char *argv[]) { int i, rc; long t1=1, t2=2, t3=3, t4=4; pthread_t threads[4]; pthread_attr_t attr; pthread_mutex_init(&count_mutex, NULL); pthread_cond_init (&count_threshold_cv, NULL); pthread_attr_init(&attr); pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_JOINABLE); pthread_create(&threads[0], &attr, watch_count, (void *)t1); pthread_create(&threads[1], &attr, inc_count, (void *)t2); pthread_create(&threads[2], &attr, inc_count, (void *)t3); pthread_create(&threads[3], &attr, inc_count, (void *)t4); for (i=0; i<NUM_THREADS; i++) { pthread_join(threads[i], NULL); } printf ("Main(): Waited on %d threads. Done.\n", NUM_THREADS); pthread_attr_destroy(&attr); pthread_mutex_destroy(&count_mutex); pthread_cond_destroy(&count_threshold_cv); pthread_exit(NULL); } so this code creates 4 threads. thread 1 keeps track of the count value while the other 3 increment the count value. the run time is the number of times the thread will increment the count value. I have a done value that allows the first thread to increment the count value first until its run time is up.. so its like a First Come First Serve. my question is, is there a better way of implementing this? I have read about SCHED_FIFO or SCHED_RR.. I guess I dont know how to implement them into this code or if it can be.

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• JPanel Layout Image Cutoff

  - by Trizicus

  I am adding images to a JPanel but the images are getting cut off. I was originally trying BorderLayout but that only worked for one image and adding others added image cut-off. So I switched to other layouts and the best and closest I could get was BoxLayout however that adds a very large cut-off which is not acceptable either. So basically; How can I add images (from a custom JComponent) to a custom JPanel without bad effects such as the one present in the code. Custom JPanel: import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.BoxLayout; import javax.swing.JPanel; import javax.swing.Timer; public class GraphicsPanel extends JPanel implements MouseListener { private Entity test; private Timer timer; private long startTime = 0; private int numFrames = 0; private float fps = 0.0f; GraphicsPanel() { test = new Entity("test.png"); Thread t1 = new Thread(test); t1.start(); Entity ent2 = new Entity("images.jpg"); ent2.setX(150); ent2.setY(150); Thread t2 = new Thread(ent2); t2.start(); Entity ent3 = new Entity("test.png"); ent3.setX(0); ent3.setY(150); Thread t3 = new Thread(ent3); t3.start(); //ESSENTIAL setLayout(new BoxLayout(this, BoxLayout.X_AXIS)); add(test); add(ent2); add(ent3); //GAMELOOP timer = new Timer(30, new Gameloop(this)); timer.start(); addMouseListener(this); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2 = (Graphics2D) g.create(); g2.setClip(0, 0, getWidth(), getHeight()); g2.setColor(Color.BLACK); g2.drawString("FPS: " + fps, 1, 15); } public void getFPS() { ++numFrames; if (startTime == 0) { startTime = System.currentTimeMillis(); } else { long currentTime = System.currentTimeMillis(); long delta = (currentTime - startTime); if (delta > 1000) { fps = (numFrames * 1000) / delta; numFrames = 0; startTime = currentTime; } } } public void mouseClicked(MouseEvent e) {} public void mousePressed(MouseEvent e) {} public void mouseReleased(MouseEvent e) {} public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } class Gameloop implements ActionListener { private GraphicsPanel gp; Gameloop(GraphicsPanel gp) { this.gp = gp; } public void actionPerformed(ActionEvent e) { try { gp.getFPS(); gp.repaint(); } catch (Exception ez) { } } } } Main class: import java.awt.EventQueue; import javax.swing.JFrame; public class MainWindow { public static void main(String[] args) { new MainWindow(); } private JFrame frame; private GraphicsPanel gp = new GraphicsPanel(); MainWindow() { EventQueue.invokeLater(new Runnable() { public void run() { frame = new JFrame("Graphics Practice"); frame.setSize(680, 420); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(gp); } }); } } Custom JComponent import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import javax.imageio.ImageIO; import javax.swing.JComponent; public class Entity extends JComponent implements Runnable { private BufferedImage bImg; private int x = 0; private int y = 0; private int entityWidth, entityHeight; private String filename; Entity(String filename) { this.filename = filename; } public void run() { bImg = loadBImage(filename); entityWidth = bImg.getWidth(); entityHeight = bImg.getHeight(); setPreferredSize(new Dimension(entityWidth, entityHeight)); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); g2d.drawImage(bImg, x, y, null); g2d.dispose(); } public BufferedImage loadBImage(String filename) { try { bImg = ImageIO.read(getClass().getResource(filename)); } catch (Exception e) { } return bImg; } public int getEntityWidth() { return entityWidth; } public int getEntityHeight() { return entityHeight; } public int getX() { return x; } public int getY() { return y; } public void setX(int x) { this.x = x; } public void setY(int y) { this.y = y; } }

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• Should I worry about reigning in namespace number/length/scope?

  - by Jay

  I've recently reorganized a solution-in-progress from 24 projects to 4. To keep the copious files organized in the "main" project, things are in folders in folders in folders. I think I've preserved a logical, discoverable arrangement of the solution content. As a result, of course, I end up with namespaces like AppName.DataAccess.NHibernate.Fluent.Mappings. Is there any compelling reason that I should care about flattening out the namespace hierarchy when my project has a somewhat deeply nested folder structure? (I am not concerned about resolving or managing using directives; I let ReSharper do all the heavy lifting here.)

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• CMS for news editing

  - by Genrih

  It is necessary to convert the site into CMS. One of the main features - edit the articles of some type, and to do so will be non-programmers, that is, the simpler the better. Ideally - no editor like ckeditor, but simply wizard, where its possible to insert images, text, title text, and it's all displayed in the page default template. Wizard can be implemented by me, let it be just not very difficult to change the default editor. Also multilanguage support is required. What can you advise?

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• Linking to non-home panel in JQTouch site

  - by Patrick Dinnen

  I'm trying to create a link from an external site that arrives at a particular, internal panel on a JQTouch site I'm building. However the browser always opens the home panel of the JQT site no matter what anchor tag I use in the link. e.g. If I try to link to the User Interface panel in the official JQTouch demo I use http://www.jqtouch.com/preview/demos/main/#ui but the home panel shows in the browser and not the sub-panel I requested. Any suggestions would be very welcome. I have control of the both the linked and linking sites so can tweak code is necessary. Thanks

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• By-Name-Parameters for Constructors

  - by hotzen

  Hello, coming from my other question is there a way to get by-name-parameters for constructors working? I need a way to provide a code-block which is executed on-demand/lazy/by-name inside an object and this code-block must be able to access the class-methods as if the code-block were part of the class. Following Testcase fails: package test class ByNameCons(code: => Unit) { def exec() = { println("pre-code") code println("post-code") } def meth() = println("method") def exec2(code2: => Unit) = { println("pre-code") code2 println("post-code") } } object ByNameCons { def main(args: Array[String]): Unit = { val tst = new ByNameCons { println("foo") meth() // knows meth() as code is part of ByNameCons } tst.exec() // ByName fails (executed right as constructor) println("--------") tst.exec2 { // ByName works println("foo") //meth() // does not know meth() as code is NOT part of ByNameCons } } } Output: foo method pre-code post-code -------- pre-code foo post-code

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• How to write java program to increase file limit using ulimit

  - by Sunil Kumar Sahoo

  I am using Fedora linux where ulimit -n 10000 increases file limit upto 10000. I want to achieve the same using java program How to write java program to increase file limit using ulimit I have tried with the below program but it didnot work well. The program didnot give any error. but didnot increase file limit also public class IncreaseFIle { public static void main(String[] args) { String command = "/bin/bash ulimit -n 10000"; // String command = "pwd"; try { Runtime.getRuntime().exec(command); } catch (IOException ex) { ex.printStackTrace(); } } } Thanks Sunil Kumar Sahoo

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• What's the simplest way to ask for user input through Modal in Win Form

  - by Refracted Paladin

  What is the simplest way to implement a Modal(popup) MessageBox that allows a custom value to be entered and returned. In my case, a String. Maybe I am over thinking this but I figured I'd ask. I plan to just create a new Form. Add a label, a textbox, two buttons. Assign the textbox to a property and from my main form call a ShowDialog() on it. Will I be able to still access the property that way or should I somehow return the value? Is this a decent way of doing this?

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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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• 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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• How can I call a module in a Perl one-liner?

  - by Zaid

  Say I have a data file that I want to process; I want to take the maximum value of each of the column and append it to the end of each line. INPUT: T1 T2 T3 35.82 34.67 31.68 32.20 34.52 33.59 37.41 38.64 37.56 OUTPUT: T1 T2 T3 35.82 34.67 31.68 35.82 32.20 34.52 33.59 34.52 37.41 38.64 37.56 38.64 I'm trying to implement this as a one-liner. So far, this is what I've come up with, although it complains that &main::max is undefined: perl -MList::Util -ani.bak -e "print qq(@F).q( ).max(@F).qq(\n)" file1.txt It seems that I haven't loaded the List::Util module. What's wrong? And is the header column an issue? perlrun doesn't have a decent example on how to do this (actually it does now, my documentation was a little out-of-date).

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• What is your Wordpress 2.9 theme development workflow after getting PSD from client?

  - by metal-gear-solid

  What are useful and free resources to make Wordpress 2.9 themes? Is Dreamweaver helpful to make themes ? What are time saving tips? I'm using Dreamweaver CS3 on Windows. and my main browser is FF 3.6. I know some extensions of dreamweaver but those are not updated with wordpress versions. Should we edit theme files directly on live server or Local XAMPP option is better? Should i create XHTML CSS version of PSD then XHTML CSS to wordpress? After making XHTML CSS Version of PSD how to incorporate Wordpress 2.9 Tags in it? Has anyone tried this tool http://www.themedreamer.com/ is this really helpful?

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• Why isn't WH_MOUSE hook global anymore?

  - by Valentin Galea

  I have this global mouse hook setup in a DLL that watches for mouse gestures. Everything works perfectly but with a hook set for WH_MOUSE_LL which is a low-level hook and one that doesn't need to be in an external injectable DLL. Once I switch - to the more suitable one would say - WH_MOUSE mouse hook, everything falls apart. Once I click outside my main application (the one that installs the hook), the hook gets corrupted - ::UnhookWindowsHookEx will fail. I only found this guy saying at experts exchange: "No way, at least under Windows XP + SVP2 WH_MOUSE won't go global, you must use WH_MOUSE_LL instead." I setup the hooks correctly: in a DLL using a shared data section, posting and not sending messages from the hook proceduce. Why has this changed? And why is not documented? Anyone encountered this? Thanks! BTW: I've reverse engineered a bit the popular StrokeIt application and it uses a combination of WH_GETMESSAGE and WH_MOUSE hooks and still works on XP/Vista...

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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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• HASH reference error with HTTP::Message::decodable

  - by scarba05

  Hi, I'm getting an "Can't use an undefined value as a HASH reference" error trying to call HTTP::Message::decodable() using Perl 5.10 / libwww installed on Debian Lenny OS using the aptitude package manager. I'm really stuck so would appreciate some help please. Here's the error: Can't use an undefined value as a HASH reference at (eval 2) line 1. at test.pl line 4 main::__ANON__('Can\'t use an undefined value as a HASH reference at enter code here`(eval 2)...') called at (eval 2) line 1 HTTP::Message::__ANON__() called at test.pl line 6 Here's the code: use strict; use HTTP::Request::Common; use Carp; $SIG{ __DIE__ } = sub { Carp::confess( @_ ) }; print HTTP::Message::decodable();

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• Showing the ProgressDialog while opening the Website

  - by david

  I have to open a website say Facebook page, twitter page and You Tube page in order to share my post there. Now when I click to the item Facebook , it gets redirected to FB to share and same for Twitter and YouTube. I have to show them in my WebView and all this is done perfectly. What I want is to show the Progress Dialog after clicking on the Item till it gets redirected to the FB , Twitter or YouTube. I don know how to show the Progress Bar for redirecting to the Main Website. Can anyone Please help me put Here. Thanks, David Brown

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• A way to avoid deriving from the provider classes in mvc authentication

  - by Shymep

  Looking for the best practice for authentication in MVC I unfortunately didn't find the clear answer to my question. Thinking of the problem I tried to imagine some priciples that could be useful in my design. Well, I would like to use a base AccountController class I want to place all the tables such as "Users", Roles, Rights etc into my own database. But I wouldn't like to implement the standard aspnetdb design (which can be easy got by using aspnet_regsql) So the main question is can I do this without deriving abstract classes like MembershipProvider, RoleProvider etc? What I would prefer not to do is implement all the abstract methods from these classes. The second question is still about the best practice for authentication e.g. for the small projects, for the large ones?

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• What is the ambiguity in this piece of code?

  - by cambr

  #include <iostream> using namespace std; class A { public: void eat(){ cout<<"A";} }; class B: public A { public: void eat(){ cout<<"B";} }; class C: public A { public: void eat(){ cout<<"C";} }; class D: public B,C { public: void eat(){ cout<<"D";} }; int main(){ A *a = new D(); a->eat(); } I am not sure this is called diamond problem or not, but why doesn't this work? When I said, a->eat() (remember eat() is not virtual), there is only one possible eat() to call, that of A. Why then, do I get this error: 'A' is an ambiguous base of 'D'

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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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• Compound dictionary keys

  - by John Keyes

  I have a particular case where using compound dictionary keys would make a task easier. I have a working solution, but feel it is inelegant. How would you do it? context = { 'database': { 'port': 9990, 'users': ['number2', 'dr_evil'] }, 'admins': ['[email protected]', '[email protected]'], 'domain.name': 'virtucon.com' } def getitem(key, context): if hasattr(key, 'upper') and key in context: return context[key] keys = key if hasattr(key, 'pop') else key.split('.') k = keys.pop(0) if keys: try: return getitem(keys, context[k]) except KeyError, e: raise KeyError(key) if hasattr(context, 'count'): k = int(k) return context[k] if __name__ == "__main__": print getitem('database', context) print getitem('database.port', context) print getitem('database.users.0', context) print getitem('admins', context) print getitem('domain.name', context) try: getitem('database.nosuchkey', context) except KeyError, e: print "Error:", e Thanks.

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