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• Why is better to use external JavaScript or libraries ; and is it prefered to use jquery meaning more security?

  - by shareef

  I read this article Unobtrusive JavaScript with jQuery and I noticed these points in the slide page 11 some companies strip JavaScript at the firewall some run the NoScript Firefox extension to protect themselves from common XSS and CSRF attacks many mobile devices ignore JavaScript entirely screen readers do execute JavaScript but accessibility issues mean you may not want them to I did not understand the fourth point. What does it mean? I need your comment and responses on these points. Is not using JavaScript and switching to libraries like jQuery worth it? UPDATE 1 : whats the meaning of Unobtrusive JavaScript with jQuery ? and yes it does not say we should use libraries but we should have them on external files for that reason i asked my question.

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• Designing exceptions for conversion failures

  - by Mr.C64

  Suppose there are some methods to convert from "X" to "Y" and vice versa; the conversion may fail in some cases, and exceptions are used to signal conversion errors in those cases. Which would be the best option for defining exception classes in this context? A single XYConversionException class, with an attribute (e.g. an enum) specifying the direction of the conversion (e.g. ConversionFromXToY, ConversionFromYToX). A XYConversionException class, with two derived classes ConversionFromXToYException and ConversionFromYToXException. ConversionFromXToYException and ConversionFromYToXException classes without a common base class.

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• OpenGL Vertex Attributes - Normalisation

  - by Daniel

  Alas, I have searched, and have found no definitive answer. When would you normalize the vertex data in OpenGL using the following command: glVertexAttribPointer(index, size, type, normalize, stride, pointer); I.e when would normalize == GL_TRUE; what situations, and why would you choose to let the GPU do the calculations instead of preprocessing it? All examples I have ever seen, have this set to GL_FALSE; and I cannot personally see a use for it. But Khronos aren't stupid, so it must be there for something useful (and probably common).

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• Switching to HTTPS - redirect question

  - by seengee

  Following the recent Google announcements about improved ranking for sites running on https we have a number of clients asking about this. Is it safe to just 301 redirect all pages to their SSL equivalent, for example in a common PHP include file: if($_SERVER['HTTPS']!="on"){ $redirect= "https://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; header("Location:$redirect",true,301); exit(); } Obviously I'm aware this is also possible within a .htaccess file but that cannot be modified in our case. Obviously all internal links would be switched to https:// links but obviously we need to sort out incoming links from Google and elsewhere. Is this a sound approach? Are there any other gotchas to be aware of?

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• Ubuntu 11.10 Unity - all Windows decorations disappear after I maximize any window

  - by korda

  When I maximize some of the windows all decorations disappear (by all, I mean on all windows)... Is that common issue on Unity or I'm just unlucky to have some prone to that bug configuration? Anyone have idea how to fix this? EDIT: It won't fix after unmaximize. It seems like maximazing window simply crashes window decorator. Decoration isn't displayed for all existing windows and any new ones. Only way I found to fix this is to run compiz --replace (but this ruins current windows placement - all windows end up on same desktop). It happens almost every time I maximize window.

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• Backup a Single Table in SQL Server using SSMS

  - by Greg Low

  Our buddy Buck Woody made an interesting post about a common question: "How do I back up a single table in SQL Server?" That got me thinking about what a backup of a table really is. BCP is often used to get the data but you want the schema as well. For reasonable-sized tables, the easiest way to do this now is to create a script using SQL Server Management Studio. To do this, you: 1. Right-click the database (note not the table) 2. Choose Tasks > Generate Scripts 3. In the Choose Objects pane,...(read more)

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• Caching strategies - LRU, MRU, Clock-Pro

  - by golgofa

  I am going to write a bachelor's science work on caching strategies and really, can't find any links to specifications or full descriptions of some of them. Only something like summaries from wikipedia. Please, help with some links on LRU, MRU caching and new-one - Clock Pro. Thanks a lot. All links are very useful for me. The purpose of work - is to compare different cache strategies to get more effiency. It based on WebApplication with ejb 2.0, so algorithm's will be implemented there, espesially in ejbLoad() and ejbFindByPrimarKey(). Also, one of aspects of this application - it will use not common scheme of tables in database - it based on metamodel. So, if you had any experience on this topic, i would be grateful to take some of your knowledge)

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• How seriously would an employer take a job application from an applicant studying at the Open University [closed]

  - by user866190

  I ask the question because I am considering applying to a traditional bricks and mortar university to do mathematics, computer science or software engineering. However I am in my late twenties and have a young family so I am seriously considering going down the Open University route and working in the software development industry at the same time. If I do attend Open University, I will definitely study Mathematics. I fell in love with PHP and the common web technologies a few years back and it has slowly progressed into learning C++, Java and also Python. If I spent the next year increasing my knowledge of those languages whilst studying at the Open University, would an employee consider a self taught programmer who is 20% of the way through a Bsc in Mathematics?

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• Display turns off when watching videos (then video starts to lag), how to fix it?

  - by Bad Learner

  Okay, here's the thing - - On my Ubuntu 11.10 64-bit installation, I have the display set to turn off automatically after 3 minutes of inactivity. There are two problems now: the display turns off even when I am watching videos. But I don't want to keep fiddling my mouse or keyboard when I am watching a movie. Okay, like I said above, the display turns off, then I move the mouse a bit each time, and the display turns back on. But now, the video doesn't play properly, it lags. A lot actually. Are these issues common? Can these be fixed?

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• What is the general definition of something that can be included or excluded?

  - by gutch

  When an application presents a user with a list of items, it's pretty common that it permits the user to filter the items. Often a 'filter' feature is implemented as a set of include or exclude rules. For example: include all emails from [email protected], and exclude those emails without attachments I've seen this include/exclude pattern often; for example Maven and Google Analytics filter things this way. But now that I'm implementing something like this myself, I don't know what to call something that could be either included or excluded. In specific terms: If I have a database table of filter rules, each of which either includes or excludes matching items, what is an appropriate name of the field that stores include or exclude? When displaying a list of filters to a user, what is a good way to label the include or exclude value? (as a bonus, can anyone recommend a good implementation of this kind of filtering for inspiration?)

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• How Is My Computer Able to Restart Itself?

  - by Jason Fitzpatrick

  It’s such a common place activity that most of us have likely never stopped to even think about it: the automatic restart. Whether user or application-initiated, what exactly happens when your computer cycles its own power? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. How Hackers Can Disguise Malicious Programs With Fake File Extensions Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer

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• Teaching: How can you motivate students to comment?

  - by keflavich

  I remember when I was taught, "comments are the most important part of code." Or rather, when I was told that comments are the most important part of the code. I don't think I was convinced, and I still see common cases where programmers are not convinced of the necessity of good & thorough comments. I am certainly convinced myself at this point - trying to read, in particular, complex formulae that call functions that call other functions that I don't understand - but I don't know how to convey this to students.

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• Does distributing non-GPLd assets with a GPL application violate the license?

  - by Richard Szalay

  This is somewhat related to my other question, but is actually different. I would like to license a Windows Phone application under the GPL. All other Windows Phone Marketplace issues aside (I'll ask those on the forums), I'd like to include icons that ship with the SDK in my application. While this is common practice (documentation points to the icons' location), I'm not sure if I'd be forcing GPL on the icons (a move expressly forbidden by the Application Provider Agreement). How is this usually handled in GPL or am I simply out of luck?

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• Clicking on clues and other objects in a 2D cluedo like game

  - by Anearion

  I'm a java/android programmer, but I don't have any experience in game programming, I'm already reading proper books, like "Pro Android Games", but my concerns are more about the ideas behind game programming than the techniques themselves. I'm working on a 2D game, something like Cluedo to let you understand the genre. I would like to know how should I act with the "scenes", for example, a room with a desk, TV, windows and a lamp. I need to make some items tappable and others not. Is it common to use one image (invisible to the user) with every different item a different color, then call the getColor() method on the image? Or use one image as background, and separate images for all the items? If the latter, how can I set the positioning? and should I use imageView or imageButton? I'm sorry if those are really low quality questions, but as "outsider" ( I'm 23 and still finishing my university ) it's pretty hard learn alone.

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• What is the impact of a CMS on page load time versus a static site?

  - by PleaseStand

  I am creating a 20-page site that will go on shared hosting. Each page will be about 20 KB (including HTML, CSS, and images common to all pages). To avoid manually adding navigation elements to each page, I am considering using a CMS. However, I am concerned that on a busy server, using a CMS would make the site load more slowly. In a shared hosting environment where PHP is run as a CGI binary, how much does a CMS (WordPress, Drupal, etc.) generally affect page load time, compared to both "plain HTML" static sites and those using PHP as merely a templating language?

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• What is Perl's relation to hackers? [closed]

  - by K.Steff

  I know Perl is a language revered by many hackers (as in hacker vs cracker) and respected by many good programmers for its expressiveness. I also realize it is useful to know and it's very handy at generalizing common Unix tasks (Unix here includes Linux and Cygwin). I also know that being a good hacker probably means you're a good programmer in general (references on this one are sparse around the web, but about everything Paul Graham has ever written seems approving of this statement to me). So my question is whether there is a reason that attracts hackers to Perl in particular? Will learing Perl improve my general programming, problem-solving and hacking skills if done properly? Does it present unique tools that are more useful to a hacker?

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• How to design console application with good seperation of UI from Logic

  - by JavaSa

  Is it considered an overkill for console application to be design like MVC , MVP or N tier architecture? If not which is more common and if you can link me to simple example of it. I want to implement a tic tac toe game in console application. I have a solution which hold two projects: TicTacToeBusinessLogic (Class library project) and TicTacToeConsoleApplication (Console application project) to represent the view logic. In the TicTacToeConsoleApplication I've Program.cs class which holds the main entry point (public static void Main). Now I face a problem. I want the game to handle its own game flow so I can: Create new GameManager class (from BL) but this causing the view to directly know the BL part. So I'm a little confused how to write it in an acceptable way. Should I use delegates? Please show me a simple example.

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• Google analytics/adwords account and leaking of private data

  - by Satellite

  I am frequently asked to log into clients google analytics and adwords accounts. If I forget to log out before visiting other google properties (google search, youtube etc), this leaves tracks of my views/searches etc, exposing my activities to the client. Summary: Client gives me access to their Google Analytics / AdWords account I log into clients Analytics account and do some stuff Then in another tab I perform some related google searches to solve some related issues Issues solved, I then close the Analytics tab I then visit google.com, perform some unrelated searches I then visit YouTube, view some unrelated videos All Web and YouTube searches are recorded in clients google account, thus leaking potentially sensitive data Even assuming that I remember to log out correctly at step 4 (as I do 95% of the time), anything I do at step 3 is exposed to the client. I would be surprised if this is not a very common issue. I'm looking for a technical solution to ensure that this can never happen. Any ideas?

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• Google I/O 2010 - Casting a wide net for all Android devices

  Google I/O 2010 - Casting a wide net for all Android devices Google I/O 2010 - Casting a wide net: How to target all Android devices Android 201 Justin Mattson One of Android's strengths is its flexibility to run on a wide variety of devices. In this session, we will explore the facilities the Android resource system provides to developers to make supporting many devices from one application binary easier, as well as common pitfalls. In addition to hardware heterogeneity, more than one version of Android may exist in the wild at any given time. We will go over strategies for providing cross-version compatibility. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 4 0 ratings Time: 01:02:15 More in Science & Technology

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• Tips or techniques to use when you don't know how to code something?

  - by janoChen

  I have a background as UI designer. And I realized that it is a bit hard for me to write a pieces of logic. Sometimes I get it right, but most of the time, I end up with something hacky (and it usually takes a lot of time). And is not that I don't like programming, in fact, I'm starting to like it as much as design. It's just that sometimes I think that I'm better at dealing with colors an shapes, rather than numbers and logic (but I want to change that). What I usually do is to search the solution on the Internet, copy the example, and insert it into my app (I know this is not a very good practice). I've heard that one tip was to write the logic in common English as comment before writing the actual code. What other tips and techniques I can use?

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• When Your ASP.NET MVC Custom Error Doesn't Render...

  You've put [HandleError] on your controller and you've set <customErrors mode="On"> in the web.config file. So why do you still see the yellow screen of death? I've heard various wrong explanations for this phenomena, including "it only works under IIS" and "it only works in release mode". But the custom error view does work in debug mode and it does work with the Visual Studio WebDev web server. I think the most common reason for the error view not to display is because the error view throws...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Strategies for porting application from Win32 API to GTK+

  - by Vitor Braga

  I have a legacy application written in C, using the raw Win32 API. The general level of abstraction is low and raw dependency on <windows.h> is common. I would like to port this application to GTK+. There are any kind of guidelines or best practices on how to do this? I've previously ported a MFC application to Qt, but the application was very abstracted - it draw it's own set of widgets, for example - and initial porting was very straightforward. I've been thinking at first using Wine to build a native Linux executable and then trying to slowly refactor it into a GTK+ app. Does some one have best practices or previous experiences to share about this?

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• Multiple Java EE Agents on Single Managed Server

  - by tina.wang

  A default JEE agent is created when you create domain, which is named as OracleDIAgent. 1. In Studio, duplicate the agent, change its name to genAgent, change the web application context to genagent. 2: Go to datasource of genAgent, drop all datasources.3: Generate server template. put the jar file under odi\common\templates\wls 4: Deploy this template by update the existing domain. Bring up the config.cmd, choose update existing domain. 5: Update the domain using the template that just generated. Go through the Configuration wizard. (I did not modify anything or configure anything here). 6: The wizard will give information says the deployment was successful. 7: Bring up the admin server and ODI_server1. 

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• php.ini modifications has no effect on joomla

  - by user488736

  I have a netbook with a recently installed ubuntu server 12.04 64-bit. I have (only) installed Joomla on it (version 2.5) and now I am trying to tweak the php.ini settings so I can install jomsocial onto joomla. I have changed these settings: upload_max_filesize = 2M post_max_size = 8M to this: upload_max_filesize = 20M post_max_size = 20M in all php.ini-files in my system. Thats six files, found using 'locate': /etc/php5/apache2/php.ini /etc/php5/cli/php.ini /usr/share/doc/php5-common/examples/php.ini-development /usr/share/php5/php.ini-production /usr/share/php5/php.ini-production-dist /usr/share/php5/php.ini-production.cli I have double-checked that these files actually contain the new settings. Still, joomla does not recognize the new settings, stating that upload_max_filesize is still only 2M and post_max_size is still only 8M The same is true after a complete restart of the server. What am I doing wrong here?

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• When Your ASP.NET MVC Custom Error Doesn't Render...

  You've put [HandleError] on your controller and you've set <customErrors mode="On"> in the web.config file. So why do you still see the yellow screen of death? I've heard various wrong explanations for this phenomena, including "it only works under IIS" and "it only works in release mode". But the custom error view does work in debug mode and it does work with the Visual Studio WebDev web server. I think the most common reason for the error view not to display is because the error view throws...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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