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  • Declarative Transactions in Node.js

    - by James Kingsbery
    Back in the day, it was common to manage database transactions in Java by writing code that did it. Something like this: Transaction tx = session.startTransaction(); ... try { tx.commit(); } catch (SomeException e){ tx.rollback(); } at the beginning and end of every method. This had some obvious problems - it's redundant, hides the intent of what's happening, etc. So, along came annotation-driven transactions: @Transaction public SomeResultObj getResult(...){ ... } Is there any support for declarative transaction management in node.js?

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  • Acer Aspire 5542G overheating with ubuntu/kubuntu 12.04

    - by james
    I have an Acer Aspire 5542G laptop purchased couple of years ago. All these days, i used windows 7 on it . Then I tried ubuntu 12.04 . Everything was fine except the overheating issue. I updated ubuntu with all security fixes and available updates but nothing solved the problem. With idle use like internet browsing, the cpu fan speeds up a lot and i can feel very hot air coming from the vent (comparable to playing serious 3d game in windows). But it will not go to a point of freeze and shutdown. But as long as im using it, with no intensive tasks at all, the laptop stays too hot. This wasn't the case with windows7. In windows 7 the fan will not rotate at all with normal use. I heard there was manufacturing defect with some acer laptops, but i think it wasn't the case with my laptop since windows7 runs perfectly. I updated the bios to latest version. I cleaned dust in the vents. I tried kubuntu 12.04 up-to-date. Nothing solved the issue. My laptop specs are: CPU : AMD turion2 x2 M500 @ 2.2GHz GPU : AMD Mobility Radeon HD4570 3GB RAM and 320GB hard disk.

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  • Has test driven development (TDD) actually benefited a real world project?

    - by James
    I am not new to coding. I have been coding (seriously) for over 15 years now. I have always had some testing for my code. However, over the last few months I have been learning test driven design/development (TDD) using Ruby on Rails. So far, I'm not seeing the benefit. I see some benefit to writing tests for some things, but very few. And while I like the idea of writing the test first, I find I spend substantially more time trying to debug my tests to get them to say what I really mean than I do debugging actual code. This is probably because the test code is often substantially more complicated than the code it tests. I hope this is just inexperience with the available tools (RSpec in this case). I must say though, at this point, the level of frustration mixed with the disappointing lack of performance is beyond unacceptable. So far, the only value I'm seeing from TDD is a growing library of RSpec files that serve as templates for other projects/files. Which is not much more useful, maybe less useful, than the actual project code files. In reading the available literature, I notice that TDD seems to be a massive time sink up front, but pays off in the end. I'm just wondering, are there any real world examples? Does this massive frustration ever pay off in the real world? I really hope I did not miss this question somewhere else on here. I searched, but all the questions/answers are several years old at this point. It was a rare occasion when I found a developer who would say anything bad about TDD, which is why I have spent as much time on this as I have. However, I noticed that nobody seems to point to specific real-world examples. I did read one answer that said the guy debugging the code in 2011 would thank you for have a complete unit testing suite (I think that comment was made in 2008). So, I'm just wondering, after all these years, do we finally have any examples showing the payoff is real? Has anybody actually inherited or gone back to code that was designed/developed with TDD and has a complete set of unit tests and actually felt a payoff? Or did you find that you were spending so much time trying to figure out what the test was testing (and why it was important) that you just tossed out the whole mess and dug into the code?

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  • finding houses within a radius

    - by paul smith
    During an interview I was asked given the following: A real estate application that lists all houses that are currently on the market (i.e., for sale) within a given distance (say for example the user wants to find all houses within 20 miles), how would you design your application (both data structure and alogirithm) to build this type of service? Any ideas? How would you implement it? I told him I didn't know becaue I've never done any geo-related stuff before.

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  • Using AWS or Azure, what to do about emails?

    - by Paul
    I'm coming from a background of paying a hosting company X amount per month for a server. This server comes with IIS, WebsitePanel and Smartermail all bundled together. When I create a new domain using WebsitePanel it automatically creates my email account. All I then need to do is configure my DNS to point to the server. I've decided that it is more cost efficient to move to AWS / Azure. Has anyone come from a similar background and moved onto a cloud system? I'd be interested to know what you did regarding emails. So far, these are the suggestions I've seen: Use Google Apps for each domain Use something like Elastic Email to sent out emails Launch a new instance and host an email server on that The first option seems like quite a lot of manual configuration, the second one works good with outgoing emails but what about receiving? Option 3 would make it less cost effective. What is your experience?

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  • Creating new games on Android and/or iPhone

    - by James Clifton
    I have a succesfull facebook poker game that is running very nicely, now some people have asked if I can port this to other platforms - mainly mobile devices (and I have been asked to make a tablet version, do I really need a seperate version?) I am currently a PHP programmer (and game designer) and I simply dont' have the time to learn Android and other languages - so I have decided to pay third parties to program them (if viable). The information I need to know is what programming language is needed for the following four devices - Android mobile phone, iPhone, iPad and tablets? Can they all run off a central sql database? If they can't then i'm not interested :( Do any of these run FLASH? Have I covered all my main bases here? For example if a person programs for a ANDROID mobile phone is that to much differant to an ANDROID tablet? They will have slightly differant graphics (because the tablet has a greater screen area might as well use it) but do they need to be started from scratch? Same goes for iPhone/iPad, do they really need to be programmed differantly if the only differance is the graphics?

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  • One monitor getting spilled over into other monitor: how to do a 100% reset of gnome graphics configuration

    - by Paul Nathan
    I had to kill a VMWare process and afterwards, my monitor's configuration is buggy. I have 2 monitors in a side-by-side configuration. My right-hand monitor is the secondary monitor. Upon its right-hand side there are about 50 pixels showing from the left side of the lefthand monitor (ie, as if it was wrapped around). Further, my mouse clicks are registering as about 50 pixels sideways from where they should be. It's as if those 50 pixels between monitors got gobbled. What have I done? I've reset the screen configuration in multiple ways, using xrandr, multiple monitors app, etc. This persists in different side-by-side configurations, and also persists with another user. It does not occur with XFCE. Resetting the Window manager with the Compiz reset WM app does not fix this. I've concluded the burn-to-the-ground approach is likely the best, and would like to do a 100% reset of my graphics settings. It's an Intel integrated chipset. Removing ~/.config/monitors.xml did not work. Also, interestingly, the mouse can mouse-over the 50 errant pixels on the rhs of the right-hand monitor. I hypothesize that it's a compositing problem occurring at the layer where the background, selection, and clicks are caught. Also, inverting the right-hand monitor removes the issue, but renders the screen unusable. Even more datapoints: This happens in KDE as well Sometimes logging into Gnome and running xrandr --output DVI1 --auto resets it, but the issue immediately reappears when I press alt-tab. With Compiz Application Switch turned on, the workspace is 'pushed back' a bit, and the slice on the RHS follows it as well. I'm wondering if it's a flaw in the compiz workspace compositing configuration. I suspect the error was in the compositing configuration. I installed 11.10.

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  • UIM notification area icon in Unity, Oneiric?

    - by James
    When I was using Maverick, it was possible to switch the input method from a UIM indicator applet. Now that I have upgraded to Oneiric, I can't seem to switch the input method even when I open uim-im-switcher-gtk. This is necessary for me because I need to be able to switch back and forth between English and Tibetan and the keyboard shortcuts don't seem to work until after I've changed the input method from the panel first. Is there some way to get a UIM indicator on the Unity panel? This is a major regression for me and makes it impossible to do certain kinds of work in Ubuntu.

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  • Speaking at Houston Techfest on September 8

    - by John Paul Cook
    I’m giving my talk on SQL Server and SSMS Tips and Tricks at Houston Techfest on September 8, 2012. It will be similar to the one I gave at last year’s Techfest and also the one I gave at the Houston SQL Server User Group meeting last month. It will be mostly different from the one I gave at the last SQL Saturday in Houston. I will cover regular expressions. If you bring your laptop with you, you can follow along with me to make sure you leave able to actually use regular expressions. If you are...(read more)

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  • Drawing out a document with strategies for coping with "disasters"

    - by James Poulson
    Does anyone happen to know of some guidelines for writing up a document for coping with possible disaster scenarios ? By disaster I mean anything that could lead to loss of work, time or eventually a client. I seem to remember reading an article along these lines but, unfortunately, I can't find it anymore. So I'd appreciate some feedback in this direction. I think such an approach would be useful in the company I'm in right now as we've had the occasional scare which might have been avoided with some preventative thinking.

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  • For an inexperienced VPS administrator, is Nginx a suitable alternative to Apache?

    - by James
    I couldn't think of the best way to set the title, so if somebody wants to edit it to something more appropriate, I'd be grateful ;) I'm what I would consider to be an inexperienced user/ administrator when it comes to running my VPS. I can get by with a few CLI commands, I can set up Webmin and I can set up Yum repos, but beyond the very basic stuff, I'm out of my depth. So far, I'm running Apache. I don't know it particularly well, but I can get by with editing httpd.conf if I'm told what to edit. I've heard good things about Nginx and that it's not as resource-hungry as Apache. I'd like to give it a go, but I can't find any information about its suitability for administrators like me, with little experience of sysadmin or web server config. Webmin now has support for Nginx, so getting it installed and running probably won't be too much of a problem. What I'm wondering is, from a site adminstrator perspective, is running Nginx as transparent as running Apache? IE, at the moment, I can just throw up Wordpress and Drupal sites without having much to worry about or having to make any config changes to Apache. Would Nginx be as transparent?

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  • Restricting access to sites

    - by Paul
    I'm having some problems configuring my local proxy server so that it would restrict access to certain websites. The proxy server I'm using is Squid; I edited its configuration file found in /etc/squid/squid.conf to include the following: acl wikipedia dstdomain .wikipedia.org http_access deny wikipedia I tried to redirect elinks to use Squid. According to Squid's config file, it listens to port 3128, so in /etc/elinks/elinks.conf I added the following: set protocol.http.proxy.host = "localhost:3128" I also restarted Squid with sudo /etc/init.d/squid restart, but I can still access the banned websites using Elinks. What did I do wrong?

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  • NOSQL - Extracting keywords from PowerPoint using PowerShell

    - by John Paul Cook
    Yesterday I mentioned my desire to transform PowerPoint slides from just data to actual information. I've made good progress using PowerShell, but I need PowerShell help with a problem that I hope is of some general interest. Originally I considered using full-text search in SQL Server, but realized it wouldn't do what I wanted, thus the NOSQL approach. I need to extract the keywords from a PowerPoint presentation. On the File menu in PowerPoint 2007/2010, the Save & Send has a Create Handouts...(read more)

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  • How can I make a webmail URL available from any hosted domain?

    - by James
    I run Roundcube webmail on my VPS. At the moment, it is only accessible from one virtual server hosted on the server, unless a separate Roundcube installation is created for other virtual servers. I would like to be able to make webmail available from any domain/ virtual server that I host, just by adding /webmail to the end. I'm sure Apache must allow me to do this - only problem is, I don't know how! Any ideas?

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  • questions on a particular algorithm

    - by paul smith
    Upon searching for a fast primr algorithm, I stumbled upon this: public static boolean isP(long n) { if (n==2 || n==3) return true; if ((n&0x1)==0 || n%3==0 || n<2) return false; long root=(long)Math.sqrt(n)+1L; // we check just numbers of the form 6*k+1 and 6*k-1 for (long k=6;k<=root;k+=6) { if (n%(k-1)==0) return false; if (n%(k+1)==0) return false; } return true; } My questions are: Why is long being used everywhere instead of int? Because with a long type the argument could be much larger than Integer.MAX thus making the method more flexible? In the second 'if', is n&0x1 the same as n%2? If so why didn't the author just use n%2? To me it's more readable. The line that sets the 'root' variable, why add the 1L? What is the run-time complexity? Is it O(sqrt(n/6)) or O(sqrt(n)/6)? Or would we just say O(n)?

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  • How do I change the date format in Gnome 3 shell?

    - by James Haigh
    I want to change the date/time format on the top panel to a format close to RFC 3339 / ISO 8601, like one of these: %F %T ? 2013-06-24 16:13:00 %F %a %T ? 2013-06-24 Mon 16:13:00 %A %F %T ? Monday 2013-06-24 16:13:00 I know Unity has a preference somewhere hidden away in dconf, this is how I did it in Unity, but I can't find such a preference for Gnome 3 shell. Preferably, I'd also like to set one of these as my system-wide date/time locale preference.

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  • Which code module should map physical keys to abstract keys?

    - by Paul Manta
    How do you bridge the gap between the library's low-level event system and your engine's high-level event system? (I'm not necessarily talking about key events, but also about quit events.) At the top level of my event system, I send out KeyPressedEvents, KeyRelesedEvents and others of this kind. These high-level events only contain the abstract values of the keys (they don't say that Space way pressed, but that the JumpKey was pressed, for example). Whose responsibility should it be to map the "JumpKey" to an actual key on the keyboard?

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  • Can I develop games for mobile platforms in C++?

    - by James Bern
    I have a good grasp in C++ and C and have also experience developing AAA game using C++. Now, I'm shamelessly thinking to dive into mobile game development either in iOS or Android. Unfortunately, I don't know objective-C and java and neither have courage to learn it. So, As above mentioned reason, Is there any possibility to do mobile development in C++ without using any single statement of JAVA and Objective-C ?

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  • Display artifacts under Ubuntu 12.10

    - by James McMahon
    I am getting some display artifacts under a fresh install of 12.10. (Open image in an another tab to get the full effect) Anyone have any idea what might be going on here or a possible solution? My first assumption was display driver, but I've been have some difficulties getting the Nvidia binary driver to work. So I wanted to check for other possible solutions before I spend a lot of time messing with getting that to work.

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  • Can manager classes be a sign of bad architecture?

    - by Paul
    Lately I've begun to think that having lots of manager classes in your design is a bad thing. The idea hasn't matured enough for me to make a compelling argument, but here's a few general points: I found it's a lot harder for me to understand systems that rely heavily on "managers". This is because, in addition to the actual program components, you also have to understand how and why the manager is used. Managers, a lot of the time, seem to be used to alleviate a problem with the design, like when the programmer couldn't find a way to make the program Just WorkTM and had to rely on manager classes to make everything operate correctly. Of course, mangers can be good. An obvious example is an EventManager, one of my all time favorite constructs. :P My point is that managers seem to be overused a lot of the time, and for no good reason other than mask a problem with the program architecture. Are manager classes really a sign of bad architecture?

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  • A Change of Seasons...

    - by James Michael Hare
    As some of you already know, today is my last day at Scottrade. It has been a great place to work and I'll miss all the relationships I've formed over the last 5 years immensely! Starting Monday, I will be taking a new position at Amazon.com in Seattle. It should be an exciting new adventure and I look forward to sharing more about my experiences in the days to come! I do intend to continue blogging (after the move settles down) about C# as I'm able, and may mix in some Java as well as I rekindle (Amazon? Kindle? Get it? Okay, that was lame, I know...) my knowledge of the language for my new job responsibilities. I'll miss all the relationships I've developed with the .NET community in St. Louis and the surrounding area, and hope to come back sometime to participate in future Days of .NET conferences, if able! Stay tuned for more updates!

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  • PHP Calculating Text to Content Ratio

    - by James
    I am using the following code to calculate text to code ratio. I think it is crazy that no one can agree on how to properly calculate the result. I am looking any suggestions or ideas to improve this code that may make it more accurate. <?php // Returns the size of the content in bytes function findKb($content){ $count=0; $order = array("\r\n", "\n", "\r", "chr(13)", "\t", "\0", "\x0B"); $content = str_replace($order, "12", $content); for ($index = 0; $index < strlen($content); $index ++){ $byte = ord($content[$index]); if ($byte <= 127) { $count++; } else if ($byte >= 194 && $byte <= 223) { $count=$count+2; } else if ($byte >= 224 && $byte <= 239) { $count=$count+3; } else if ($byte >= 240 && $byte <= 244) { $count=$count+4; } } return $count; } // Collect size of entire code $filesize = findKb($content); // Remove anything within script tags $code = preg_replace("@<script[^>]*>.+</script[^>]*>@i", "", $content); // Remove anything within style tags $code = preg_replace("@<style[^>]*>.+</style[^>]*>@i", "", $content); // Remove all tags from the system $code = strip_tags($code); // Remove Extra whitespace from the content $code = preg_replace( '/\s+/', ' ', $code ); // Find the size of the remaining code $codesize = findKb($code); // Calculate Percentage $percent = $codesize/$filesize; $percentage = $percent*100; echo $percentage; ?> I don't know the exact calculations that are used so this function is just my guess. Does anyone know what the proper calculations are or if my functions are close enough for a good judgement.

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  • No monitor output after fresh install of 11.10 64-bit

    - by James
    I have a machine with a Nvidia 8600GT graphics card and a CRT monitor. Previously, I have only used Windows on it, and the graphics card seems to be working correctly in Windows 7. I booted up and installed Ubuntu 11.10 amd64 from the LiveCD and the whole process worked perfectly. When I tried to boot off the hard disk for the first time, the output to the monitor switched off during the splash screen, and this happens consistently. I can ctrl-alt-f2, so I tried an apt-get upgrade, which didn't help; nor did apt-get install nvidia-current. There is nothing that looks relevant in dmesg. Booting with the nomodeset option has no effect. Following the answers in this similar thread, I tried apt-get purge nvidia-173. Both startx and service lightdm start just say the service is already running. Does anyone know how to find out what the problem is? I was wondering if it is just that Ubuntu is trying to use a resolution that the monitor doesn't support, but I can't find out how to change that from the command line.

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  • Shakespeare and storing Unicode characters

    - by John Paul Cook
    This post is about the political issues involved with using multiple languages in a global organization and how to troubleshoot the technical details. The CHAR and VARCHAR data types are NOT suitable for global data. Some people still cling to CHAR and VARCHAR justifying their use by truthfully saying that they only take up half the space of NCHAR and NVARCHAR data types. But you’ll never be able to store Chinese, Korean, Greek, Japanese, Arabic, or many other languages unless you use NCHAR and NVARCHAR...(read more)

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  • the requested resource is not available [closed]

    - by James Pj
    I have written a Java servlet program and run it through local Tomcat 7, But it was showing following error : HTTP Status 404 - /skypark/registration type Status report message /skypark/registration description The requested resource is not available. Apache Tomcat/7.0.33 I don't know what was the reason for it my Html page is <html> <head> <title> User registration </title> </head> <body> <form action="registration" method="post"> <center> <h2><b>Skypark User Registration</b></h2> <table border="0"> <tr><td> First Name </td><td> <input type="text" name="fname"/></br> </td></tr><tr><td> Last Name </td><td> <input type="text" name="lname"/></br> </td></tr><tr><td> UserName </td><td> <input type="text" name="uname"></br> </td></tr><tr><td> Enter Password </td><td> <input type="password" name="pass"></br> </td></tr><tr><td> Re-Type Password </td><td> <input type="password" name="pass1"></br> </td></tr><tr><td> Enter Email ID </td><td> <input type="email" name="email1"></br> </td></tr><tr><td> Phone Number </td><td> <input type="number" name="phone"> </td></tr><tr><td> Gender<br> </td></tr><tr><td> <input type="radio" name="gender" value="Male">Male</input></br> </td></tr><tr><td> <input type="radio" name="gender" value="Female">Female</input></br> </td></tr><tr><td> Enter Your Date of Birth<br> </td><td> <Table Border=0> <tr> <td> Date </td> <td>Month</td> <td>Year</td> </tr><tr> <td> <select name="date"> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> . . . have some code . . . </table> <input type="submit" value="Submit"></br> </center> </form> </body> </html> My servlet is : package skypark; import skypark.*; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.sql.*; public class Registration extends HttpServlet { public static Connection prepareConnection()throws ClassNotFoundException,SQLException { String dcn="oracle.jdbc.driver.OracleDriver"; String url="jdbc:oracle:thin:@JamesPJ-PC:1521:skypark"; String usname="system"; String pass="tiger"; Class.forName(dcn); return DriverManager.getConnection(url,usname,pass); } public void doPost(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException { resp.setContentType("text/html"); PrintWriter out=resp.getWriter(); try { String phone1,uname,fname,lname,dob,address,city,state,country,pin,email,password,gender,lang,qual,relegion,privacy,hobbies,fav; uname=req.getParameter("uname"); fname=req.getParameter("fname"); lname=req.getParameter("lname"); dob=req.getParameter("date"); address=req.getParameter("address"); city=req.getParameter("city"); state=req.getParameter("state"); country=req.getParameter("country"); pin=req.getParameter("pin"); email=req.getParameter("email1"); password=req.getParameter("password"); gender=req.getParameter("gender"); phone1=req.getParameter("phone"); lang=""; qual=""; relegion=""; privacy=""; hobbies=""; fav=""; int phone=Integer.parseInt(phone1); Connection con=prepareConnection(); String Query="Insert into regdetails values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)"; PreparedStatement ps=con.prepareStatement(Query); ps.setString(1,uname); ps.setString(2,fname); ps.setString(3,lname); ps.setString(4,dob); ps.setString(5,address); ps.setString(6,city); ps.setString(7,state); ps.setString(8,country); ps.setString(9,pin); ps.setString(10,lang); ps.setString(11,qual); ps.setString(12,relegion); ps.setString(13,privacy); ps.setString(14,hobbies); ps.setString(15,fav); ps.setString(16,gender); int c=ps.executeUpdate(); String query="insert into passmanager values(?,?,?,?)"; PreparedStatement ps1=con.prepareStatement(query); ps1.setString(1,uname); ps1.setString(2,password); ps1.setString(3,email); ps1.setInt(4,phone); int i=ps1.executeUpdate(); if(c==1||c==Statement.SUCCESS_NO_INFO && i==1||i==Statement.SUCCESS_NO_INFO) { out.println("<html><head><title>Login</title></head><body>"); out.println("<center><h2>Skypark.com</h2>"); out.println("<table border=0><tr>"); out.println("<td>UserName/E-Mail</td>"); out.println("<form action=login method=post"); out.println("<td><input type=text name=uname></td>"); out.println("</tr><tr><td>Password</td>"); out.println("<td><input type=password name=pass></td></tr></table>"); out.println("<input type=submit value=Login>"); out.println("</form></body></html>"); } else { out.println("<html><head><title>Error!</title></head><body>"); out.println("<center><b>Given details are incorrect</b>"); out.println(" Please try again</center></body></html>"); RequestDispatcher rd=req.getRequestDispatcher("registration.html"); rd.include(req,resp); return; } } catch(Exception e) { out.println("<html><head><title>Error!</title><body>"); out.println("<b><i>Unable to process try after some time</i></b>"); out.println("</body></html>"); RequestDispatcher rd=req.getRequestDispatcher("registration.html"); rd.include(req,resp); return; } out.flush(); out.close(); } } And the web.xml file is <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0" metadata-complete="true"> <servlet> <servlet-name>reg</servlet-name> <servlet-class>skypark.Registration</servlet-class> </servlet> <servlet-mapping> <servlet-name>reg</servlet-name> <url-pattern>/registration</url-pattern> </servlet-mapping> This i kept in C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\skypark\WEB_INF\web.xml and servlet class in C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\skypark\WEB_INF\classes\skypark and registration.html in C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\skypark\ if any mistake in this makes above error means please help me.Thanks in advance....

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