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• Language+IDE for teaching high school students?

  - by daveagp

  I'm investigating languages and IDEs for a project involving teaching high-school students (around grade 11). It will teach basics of programming as an introduction to computer science (e.g., including how numbers/strings/characters are represented, using procedures and arrays, control flow, a little bit of algorithms, only very basic I/O). The non-negotiable requirements for this project are: a free up-to-date cross-platform IDE (Win & Mac incl. 64-bit) with debug a compiler where it's easy to learn from your mistakes together with the IDE, a gentle installation+learning curve So far, the best options I see are the following. Are there others I should know about? I am giving a short explanation with each one to generally show what I am looking for. In order from most to least promising: Pascal + FreePascal IDE (it seems a little buggy but actively developed?) Python + Eclipse + PyDev (good but features are overwhelming/hard to navigate) Groovy + Eclipse ('') Python + IDLE (looks unnatural to do debugging, to me) Pascal + Lazarus (IDE overwhelming, e.g. not obvious how to "start from scratch") Preferably, as a rule of thumb, the language should be direct enough that you don't need to wrap every program in a class, don't need to reference a System object to println, etc. I tried a little bit to see if there is something in JavaScript or (non-Visual) Basic along the lines of what I want, but found nothing so far. I would say that C/C++/C#, Java, Ruby, Lisp, VB do not fit my criteria for languages for this project. To reiterate my questions: are any of those 5 options really awesome or un-awesome? Are there other options which are even MORE awesome? Anything for Basic or JavaScript which meets all of the criteria? Thanks!

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• How to figure out what error my Java Eclipse project has?

  - by Greg Mattes

  I've created a Java project from existing source with an Ant build script in Eclipse. I cannot run my project because Eclipse tells me that there is at least one error in it. Now, I know that the project runs fine on the command line, so I suspect an Eclipse configuration error. As far as I can tell, the only feedback that I have from Eclipse is a little red X on my project in the Package Explorer window and dialog window when I try to run the project says there are errors in the project This is all wonderful, but what is the error? Is there a "show me the next error" button somewhere? In the past, on other Eclipse projects, I've notice other little red X's on folders containing source files with errors, the little red X's appear on the source files as well. I scanned (manually) through all of the source files and I haven't found any other red X's (again, where is the "next error" button?). If I select the "Proceed" button I am greeted with a java.lang.NoClassDefFoundError for my main class, which makes me suspect a classpath issue. I've checked the classpath, and I'm fairly certain that it's correct. Is there a way to see the exact jvm command line that Eclipse is invoking? I realize that it might be invoking the JVM programmatically, and not on a "real" command line. In any case, is there a way, other than the run configuration dialog, to see what is actually happening when I hit the "Proceed" button?

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• Load Images in WPF application

  - by LLS

  I am not familiar with WPF, and I just feel quite confusing. I am trying to create a little computer game, and there are elements I want to display dynamically. I use Image class and add the images to a canvas. But I'm not sure whether it's a good practice. I feel that adding controls to canvas seem to be a little wired. And I'm a little concerned about the performance, because I may need many images. The real problem is, I can't load the images from the image files. I see an example in a text book like this (XMAL): <Image Panel.ZIndex="0" Margin="0,0,0,0" Name ="image1"> <Image.Source> <BitmapImage UriSource="Bell.gif" /> </Image.Source> </Image> Where Bell.gif is added into the project. And I tried to copy this in code to create an image. new Image { Source = new BitmapImage(new Uri("Blockade.bmp"))} But I got invalid Uri exception. After some search in the Internet, I found that loading resources dynamically seems to be difficult. Can I load the files added to the project dynamically? If I use absolute path then it's OK. But I can't expect every computer will put the files in the same location. Can I use relative path? I tried new Image { Source = new BitmapImage(new Uri(@"Pictures\Blank Land.bmp", UriKind.Relative)) } But it doesn't work. (The image is blank) Thanks.

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• Nusphere PHPEd: PHP Function Hints Lost Arguments?

  - by Eli

  Hi All, My PHPEd suddenly stopped showing arguments and arg order in the hints, and now just shows a basic description of the function. Before I go digging around in the config files, has anyone else had this problem? Thanks! Edit: Sorry, I may not have been entirely clear on this. There is no problem with my own classes, only with the actual php functions. Example: How it used to work: I type a PHP function, say strpos. As soon as I type the '(' at the end of it, I get the little yellow box, showing something like this: int strpos ( string $haystack , mixed $needle [, int $offset=0 ] ) with the first argument bold. If I type it, and then a comma, it bolds the second arg, and so on. This is really nice, since PHP functions are a bit scrambled as far as argument order, and I don't have to look them up every time. How it works now: I type a php function, say strpos. As soon as I type the '(' at the end of it, I get the little yellow box. It says something like "strpos - Returns the numeric position of the first occurrence of needle in the haystack string." There are no arguments shown, which makes the little box basically worthless - I know what strpos does, I just want a reminder of the argument order. I think this may be a problem with the included PHPDoc, which I never use, but may be the source of the data for the hint box. I did recently upgrade to 5.6, but ended up removing it and restoring 5.2. I installed to a different folder, and uninstalled from there, but it may have overwritten something in the original folder? I'm using v5.2 (5220). Thanks!

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• I've made something that might be useful to the community. Now what?

  - by Chris McCall

  If the specifics are important, I made a cruisecontrol.net publisher plugin that notifies a series of phone numbers via voice, announcing the current state of the build. It uses Twilio to do so. I'd like to avoid getting hung up on the specifics of what it is I've made, as I have this question a lot, with a number of little hobby one-offs. What's the state of the art as far as making my hobby output available to the world at large? There seem to be a lot of options for open-source project hosting, community features, and what role to take in all of this. It's a little bewildering. What I'm looking for is to put this out into the wild for free and basically take a hands-off approach from there. Is that realistic? Which project hosting service can I use for free to allow developers to at least download the code, report issues and collaborate with each other to improve the product? What snags have you run into that could make me regret this decision? I'm interested in war stories, advice and guidance on making this little product available to the community where it can be used.

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• generating images with php based on css3 gradient settings?

  - by thrice801

  Hi, Does anyone know if there is a php library, or if there isnt, have any input on how one would go about generating an image via php, from basic HTML element input settings, and CSS 3 gradient parameters. To give an example on why this would be useful, I have found as of a couple days ago, that laying out the wireframe for a webpage using basic Css3 gradient styling speeds up my design and development time by, well, alot. I cant design from photoshop, Ill spend hours tweaking stupid little things that only lead to me tweaking more stupid little things to compensate for stupid little changes. -- So, I had an epiphany to stop using photoshop until the end, and just focus on the main styling of elements, text-shadow, and borders for highlights, and I feel I am able to make super clean, more focused layout by being more restricted to the basics of graphic design with just css. Anyways, so Im planning on after I have the layouts done, to then recreate the graphics in photoshop, so that every browser is able to render the images. This wont take long, but as far as repeating it goes, if I could just do it with PHP, that would be incredible. For instance, take this style for example, which renders a clean looking ipad/pod ish menu/button gradient. [code] background: -moz-linear-gradient(top, #808080, #454545 50%, #313131 51%, #333333); background: -webkit-gradient(linear, left top, left bottom, color-stop(0, #808080), color-stop(.5, #454545), color-stop(.5, #313131), to(#333333));[/code] Basically what Im looking to do is take one or more inputs that control rendering the image as you see there. Take a width and a height input, and then render the image gradient accordingly, so I can save it, upload it and then use it in my designs. So ya, I know PHP has some image generation capabilities but I dont know to what extent, any input on the most effective way to go about doing this or whether it already exists, would be appreciated!

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• Dynamic Control loading at wrong time?

  - by Telos

  This one is a little... odd. Basically I have a form I'm building using ASP.NET Dynamic Data, which is going to utilize several custom field templates. I've just added another field to the FormView, with it's own custom template, and the form is loading that control twice for no apparent reason. Worse yet, the first time it loads the template, the Row is not ready yet and I get the error message: {"Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control."} I'm accessing the Row variable in a LinqDataSource OnSelected event in order to get the child object... Now for the wierd part: If I reorder the fields a little, the one causing the problem no longer gets loaded twice. Any thoughts? EDIT: I've noticed that Page_Load gets called on the first load (when Row throws an exception if you try to use it) but does NOT get called the second time around. If that helps any... Right now managing it by just catching and ignoring the exception, but still a little worried that things will break if I don't find the real cause. EDIT 2: I've traced the problem to using FindControl recursively to find other controls on the page. Apparently FindControl can cause the page lifecycle events (at least up to page_load) to fire... and this occurs before that page "should" be loading so it's dynamic data "stuff" isn't ready yet.

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• How to tell what account my webservice is running under in Visual Studio 2005

  - by John Galt

  I'm going a little nuts trying to understand the doc on impersonation and delegation and the question has come up what account my webservice is running under. I am logged as myDomainName\johna on my development workstation called JOHNXP. From Vstudio2005 I start my webservice via Debug and the wsdl page comes up in my browser. From Task Manager, I see the following while sitting at a breakpoint in my .asmx code: aspnet_wp.exe pid=1316 UserName=ASPNET devenv.exe pid=3304 UserName=johna The IIS Directory Security tab for the Virtual Directory that hosts my ws.asmx code has "Enable Anonymous access" UNCHECKED and has "Integrated Windows Authentication" CHECKED. So when the MSDN people state "you must configure the user account under which the server process runs", what would they be refering to in the case of my little webservice described above? I am quoting from: http://msdn.microsoft.com/en-us/library/aa302400.aspx Ultimately, I want this webservice of mine to impersonate whatever authenticated domain user browses through to an invoke of my webservice. My webservice in turn consumes another ASMX webservice on a different server (but same domain). I need this remote webservice to use the impersonated domain user credentials (not those of my webservice on JOHNXP). So its getting a little snarly for me to understand this and I see I am unclear about the account my web service uses. I think it is ASPNET in IIS 5.1 on WinXP but not sure.

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• How to make a increasing numbers after filenames in C?

  - by zaplec

  Hi, I have a little problem. I need to do some little operations on quite many files in one little program. So far I have decided to operate them in a single loop where I just change the number after the name. The files are all named TFxx.txt where xx is increasing number from 1 to 80. So how can I open them all in a single loop one after one? I have tried this: for(i=0; i<=80; i++) { char name[8] = "TF"+i+".txt"; FILE = open(name, r); /* Do something */ } As you can see the second line would be working in python but not in C. I have tried to do similiar running numbering with C to this program, but I haven't found out yet how to do that. The format doesn't need to be as it is on the second line, but I'd like to have some advice of how can I solve this problem. All I need to do is just be able to open many files and do same operations to them.

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• Difference in clientX and clientY when going out of the browser on ie/ff

  - by Py

  I just ran into a little problem with clientX and clientY. I put a little event to detect if the mouse goes out of the window and to know where it exits. And there come the trouble, it works fine with firefox, but only sends -1 as an answer in IE. Does someone know if there is a way to solve easily that problem and that without using a framework? A little bit of code to reproduce that: <html> <head> <script type="text/javascript"> document.onmouseout=function(e){ if (!e) var e = window.event; var relTarg = e.relatedTarget || e.toElement; if (!relTarg){ document.getElementById('result1').innerHTML="e.clientY:"+e.clientY+" e.clientX:"+e.clientX; } }; </script> </head> <body> <div id="result1">Not Yet</div> </body> </html> the results if I exit through the left of the window are: e.clientY:302 e.clientX:-130 on firefox e.clientY:-1 e.clientX:-1 on ie. Thanks in advance.

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• Being pressured to GOTO the dark-side

  - by Dan McG

  We have a situation at work where developers working on a legacy (core) system are being pressured into using GOTO statements when adding new features into existing code that is already infected with spagetti code. Now, I understand there may be arguments for using 'just one little GOTO' instead of spending the time on refactoring to a more maintainable solution. The issue is, this isolated 'just one little GOTO' isn't so isolated. At least once every week or so there is a new 'one little GOTO' to add. This codebase is already a horror to work with due to code dating back to or before 1984 being riddled with GOTOs that would make many Pastafarians believe it was inspired by the Flying Spagetti Monster itself. Unfortunately the language this is written in doesn't have any ready made refactoring tools, so it makes it harder to push the 'Refactor to increase productivity later' because short-term wins are the only wins paid attention to here... Has anyone else experienced this issue whereby everybody agrees that we cannot be adding new GOTOs to jump 2000 lines to a random section, but continually have Anaylsts insist on doing it just this one time and having management approve it? tldr; How can one go about addressing the issue of developers being pressured (forced) to continually add GOTO statements (by add, I mean add to jump to random sections many lines away) because it 'gets that feature in quicker'? I'm beginning to fear we may loses valuable developers to the raptors over this...

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• OpenSource Projects - Is there a site which lists projecs that need more developers?

  - by Jamie

  Morning/Afternoon/Evening all, Do any of you know of a website which lists opensource projects which are in need of more help? Let me elaborate, I would like to work on another open source project (I already work on a couple), however, it would be nice to have a site which lists lots of OS projects, their aims, deadlines, workload, how many more developers they are in need of etc. Of course, I could just pick a topic i'm interested in, find an OS project and then work on it, however, it would be nice to see a diversified list of projects. Primarily because some little known awesome projects get little attention and big projects such as jQuery forks, adium, gimp etc. etc. get a lot of attention because they are well known (and of course because they are great)and thus get a lot of developers working on them. It would be nice to see some little known projects getting more attention and thus hopefully drawing some people to work on them. Currently there are many websites hosting os projects, such as github, sourceforge, google code etc. A website to centralise all of this into one place and categorise it would be awesome. Let me know your thoughts please. I'm not looking for an answer per se, so I will mark it is as a community wiki. Your thoughts would be great.

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• SWIG: From Plain C++ to working Wrapper

  - by duckworthd

  Hi everyone. I've been trying to create a SWIG wrapper for this tiny little C++ class for the better part of 3 hours with no success, so I was hoping one of you out there could lend me a small hand. I have the following class: #include <stdio.h> class Example { public: Example(); ~Example(); int test(); }; #include "example.h" Along with the implementation: Example::Example() { printf("Example constructor called\n"); } Example::~Example() { printf("Example destructor called\n"); } int Example::test() { printf("Holy shit, I work!\n"); return 42; } I've read through the introduction page ( www.swig.org/Doc1.3/Java.html ) a few times without gaining a whole lot of insight into the situation. My steps were Create an example.i file Compile original alongside example_wrap.cxx (no linking) link resulting object files together Create a little java test file (see below) javac all .java files there and run Well steps 4 and 5 have created a host of problems for me, starting with the basic ( library 'example' not found due to not being in java's path ) to the weird ( library not found even unless LD_LIBRARY_PATH is set to something, even if it's nothing at all). I've included my little testing code below public class test2 { static { String libpath = System.getProperty("java.library.path"); String currentDir = System.getProperty("user.dir"); System.setProperty("java.library.path", currentDir + ":" + libpath); System.out.println(System.getProperty("java.library.path")); System.loadLibrary("example"); } public static void main(String[] args){ System.out.println("It loads!"); } } Well, if anyone has navigated these murky waters of wrapping, I could not be happier than if you could light the way, particularly if you could provide the example.i and bash commands to go along with it.

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• How do I show the selected item in an HTML <select> at the top

  - by Michael Meadows

  I have an HTML select that looks something like this (values are fake) <select size="40"> <option value="1">What would you do if I sang out of tune,</option> <option value="2">Would you stand up and walk out on me?</option> ... more <option value="156">Lend me your ears, and I'll sing you a song,</option> <option selected="selected" value="157">I will try not to sing out of key.</option> <option value="158">Oh, I get by with a little help from my friends.</option> ... more <option value="507">I get high with a little help from my friends.</option> <option value="509">Gonna' try with a little from my friends.</option> </select> The problem that I have is that when displaying the list after loading the page and the selected option is in the middle of the very long list, IE scrolls the selected option to the top of the list (which is what I want). Firefox, Chrome, Opera, and Safari show it at the bottom (which I don't want). I have to assume that IE is doing it wrong since everyone else shows it at the bottom. How can I force the browsers to display the selected item at the top of the list. I do not want to put it at the top of the list, I just want it to scroll such that the selected option is at the top. bonus, it would be even better if I can put it fourth from the top, but I can live without that if it's too difficult.

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• Media Temple-like hosting services?

  - by antonpug

  I have a couple of wordpress sites which do not get much traffic now, but I plan on expanding to something like a 1000-2000visits/day in a year or two. Media Temple has some really nice offerings, but their Wordpress plan is 20/month...which is a little too much, seeing as at this point my site is more of a hobby than a money making machine. I currently host with HostGator (just switched from GodaddyiPageBluehost). All these cheaper/pop hosting services are okay, but it would be nice to find something a little bit more "premium", but at a lower cost than MT. Anyone know anything worth looking at?

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• Aspect Ratio on Nero 9 for burning DVD

  - by Tara

  I am currently attempting to burn a screen capture file to DVD. I will admit that I know very little about the process, the terminology, and am at a loss of how to find this information. I am using Nero 9 and am very displeased that the manuals available to me online explain very little. My current problem is that when I burn to DVD, my beautiful screen capture ends up being cropped. Through endless amounts of googling I am under the impression that this is due to aspect ratio. However, as windows will not tell me the resolution size for me to determine the correct aspect ratio I do not know how to proceed. Is there a way using Nero 9 for me to be able to burn my screen capture to DVD? Any advice or suggestions are appreciated.

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• Linking "Wave Volume" to "Main Speaker Volume"

  - by ZorbaTHut

  I've got a Logitech keyboard and a digital sound device. The Logitech keyboard has a little volume wheel that sets the Main Speaker Volume. The digital sound device ignores the Main Speaker Volume and only pays attention to Wave Volume. See the issue? I'm looking for a program that can link Wave Volume to Main Speaker Volume. The closest I've found is a little utility named VolumeTracker, but it eats an entire CPU core, which is a bit much for a program of this functionality. Alternatively, I'd take a way to make the standard Logitech drivers change Wave Volume instead of Main Speaker Volume.

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• Git version control with multiple users

  - by ignatius

  Hello, i am a little bit lost with this issue, let me explain you my problem: I want to setup a git repository, three of four users will contribute, so they need to download the code and shall be able to upload their changes to the server or update their branch with the latest modifications. So, i setup a linux machine, install git, setup the repository, then add the users in order to enable the acces throught ssh. Now my question is, What's next?, the git documentation is a little bit confusing, i.e. when i try from a dummy user account to clone the repository i got: xxx@xxx-desktop:~/Documentos/git/test$ git clone -v ssh://[email protected]/pub.git Initialized empty Git repository in /home/xxx/Documentos/git/test/pub/.git/ [email protected]'s password: fatal: '/pub.git' does not appear to be a git repository fatal: The remote end hung up unexpectedly is that a problem of privileges? need any special configuration? i want to avoid using git-daemon or gitosis, sorry, maybe my question sound silly but git is powerfull but i admit not so user friendly. Thanks Br

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• Snippets between desktop and laptop

  - by Jamie F

  The Situation: At work, I have a nice beefy desktop running Windows Server 2008 R2 (SharePoint dev machine). My handy ThinkPad is right next to it. Every once in a while I'd like to cut and paste or share something (usually text) between the machines: for example, I might be headed out and I'd like to take send the URL I'm reading from the desktop to the laptop. Of course I can create a share or use the Admin shares and create files to get stuff back and forth, but that seems heavyweight for what I'm thinking of. I'm thinking more along the lines of sending myself an IM. How do you get little things from machine to machine? Keep a shared folder pinned to the taskbar? Send an email to yourself? Bookmark sync? While on it, I'm looking for a decent multiple clipboard handler: maybe these two functions are combined in some nice little utility? I suspect I'm missing something simple here... Thanks... Jamie F.

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• Open Source webapp that shows PC / Projector status in 30+ Lecture rooms

  - by Seanchán

  I am looking for a simple web application that only has a simple graphical representation of the current status of 30+ lecture rooms. I.e. Green = good, Red=bad i.e. PC or Projector not working. With a little message and a ETA as well. I am not looking for monitoring software, merely a way for a tech to flag a room as "technically challenged" until 1PM or until "Friday 10AM". With a message for those lecturers who are interested: "Waiting on replacement bulb" or "Power supply gone" I know this is a simple thing to code up yourself, but I am looking for something that has been around for a few years that has some cool extra little functionality that you wouldn't think of yourself. I just can't find anything like that out there. And just to be clear: not monitoring software, more like lecturer feedback web app.

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• Is it possible to use a laptop charger in other laptop with different specifications?

  - by poz2k4444

  Let's say I have my laptop charger that uses 19.5V and 3.9A and I want to use it in other laptop that has no charger but it needs just 19V and 3.16A, I've studied a little of electtronics and I know that the amperage doesn't affect because the computer will use just the necessary, but I'm not really sure about the voltage. I read this post and I know the polarity is the same and the connector fits, but it doesn't say anything about voltage, I also know if the voltage of the charger were lower than the specification it'll not be a problem, but what about this little almost insignificant difference??

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• best practices for setting development environment

  - by Sharique

  I use Linux as primary OS. I need some suggestions regarding how should I set up my desktop and development. I do work on mostly .Net and Drupal, but some time on other lamp products and C/C++, Qt. I'm also interested in mobile (android..) and embedded development. Currently I install everything on my main OS, even I use it a little. I use VMs a little. Should I use separate VM for each kind of development (like one for .Net/Mono, another C++, one for mobile and one for db only, one for xyz things etc) Keep primary development environment on main os and moveothers in VM. main os should be messed up keep things easy to organize (must) performance should be optimal

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• Bootstrap a debian build environment and build source packages with no root privileges

  - by Erwan Queffélec

  On debian squeeze, I am trying to do the following : fetch sources package from the wheezy source repository bootstrap a squeeze chroot for several architectures build the packages for several architectures (i386, amd64 + all and any) I want both the fetching, bootstrapping and build operation to be scriptable, repeatable, and run as a normal user. For the environment setup, I want to make as little use of the root account as possible (install the necessary dependencies, and maybe some visudo stuff). If possible I would like to avoid using a VM (pbuilder with user mode linux) So far I have tried several things with pbuilder (require root), debootstrap (require root) with little success. Here is an example script of what I want to do (does not work): #/bin/bash set -e set -x this=`readlink -f $0` this_dir=`dirname $this` archs='i386 amd64 any all' pushd $this_dir/src # I actually want the following line to work with a repo that # is not in /etc/apt/sources.list but that is another question apt-get source cyrus-imapd-2.4 popd for arch in $archs do build_dir=$this_dir/build/$arch/ pbuilder --create --configfile $build_dir/pbuilderrc --buildresult $build_dir/ pbuilder --build --configfile $build_dir/pbuilderrc --buildresult \ $build_dir/ $this_dir/src/*.dsc # of course I want to use the .dput.cf in /home/myuser/ # and not in /root/ dput $build_dir/$arch/*.changes done

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• Aspect Ratio on Nero 9 for burning DVD

  - by user27720

  I am currently attempting to burn a screen capture file to DVD. I will admit that I know very little about the process, the terminology, and am at a loss of how to find this information. I am using Nero 9 and am very displeased that the manuals available to me online explain very little. My current problem is that when I burn to DVD, my beautiful screen capture ends up being cropped. Through endless amounts of googling I am under the impression that this is due to aspect ratio. However, as windows will not tell me the resolution size for me to determine the correct aspect ratio I do not know how to proceed. Is there a way using Nero 9 for me to be able to burn my screen capture to DVD? Any advice or suggestions are appreciated.

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• Multi-Tenant VMWare View Deployment

  - by SimonJGreen

  We have VMWare View 5 set up for a single tenant environment, absolutely brilliant and works perfectly. Two thumbs up there! We're looking at the possibility of deploying this in a multi tenant scenario, where multiple unlinked companies connect to a VDI solution hosted by us but have no visibility of each other. Obviously;y this could be achieved by doubling up on all the components, having a complete VMWare View stack for each tenant, but this seems a little bit messy. Has anyone done this before, and if so how? Googling sheds little light apart from this experts exchange topic.

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