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Articles indexed in March 2010

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  • Unable to change the value of the variable

    - by Legend
    I'm using a discrete event simulator called ns-2 that was built using Tcl and C++. I was trying to write some code in TCL: set ns [new Simulator] set state 0 $ns at 0.0 "puts \"At 0.0 value of state is: $state\"" $ns at 1.0 "changeVal" $ns at 2.0 "puts \"At 2.0 values of state is: $state\"" proc changeVal {} { global state global ns $ns at-now "set state [expr $state+1]" puts "Changed value of state to $state" } $ns run Here's the output: At 0.0 value of state is: 0 Changed value of state to 0 At 2.0 values of state is: 0 The value of state does not seem to change. I am not sure if I am doing something wrong in using TCL. Anyone has an idea as to what might be going wrong here? EDIT: Thanks for the help. Actually, ns-2 is something over which I do not have much control (unless I recompile the simulator itself). I tried out the suggestions and here's the output: for the code: set ns [new Simulator] set state 0 $ns at 0.0 "puts \"At 0.0 value of state is: $state\"" $ns at 1.0 "changeVal" $ns at 9.0 "puts \"At 2.0 values of state is: $state\"" proc changeVal {} { global ns set ::state [expr {$::state+1}] $ns at-now "puts \"At [$ns now] changed value of state to $::state\"" } $ns run the output is: At 0.0 value of state is: 0 At 1 changed value of state to 1 At 2.0 values of state is: 0 And for the code: set ns [new Simulator] set state 0 $ns at 0.0 "puts \"At 0.0 value of state is: $state\"" $ns at 1.0 "changeVal" $ns at 9.0 "puts \"At 2.0 values of state is: $state\"" proc changeVal {} { global ns set ::state [expr {$::state+1}] $ns at 1.0 {puts "At 1.0 values of state is: $::state"} } $ns run the output is: At 0.0 value of state is: 0 At 1.0 values of state is: 1 At 2.0 values of state is: 0 Doesn't seem to work... Not sure if its a problem with ns2 or my code...

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  • How do I know if 'hg clone' is doing the work remotely?

    - by jjfine
    I've got a very simple windows install of Mercurial on my machine. The 'central' repository is located at //mymachine/hg-repos/central. I want remote (VPN) users to be able to create clones of this repository in the hg-repos directory because it gets daily backups. I have given these users full control of the hg-repos directory. My question is this: If I'm on a remote machine, and I run the command: hg clone //mymachine/hg-repos/central //mymachine/hg-repos/central-copy ...is the remote machine doing most of the work? I don't want the client to have to download all of the central repository and then upload it all back because people are going to be using this from across the country. But I suspect this is what's happening here since it works so easily.

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  • Windows 7 RC sleep on Thinkpad R51?

    - by Ragesh
    I have an old Thinkpad R51 and Windows 7 just doesn't give me a Sleep option. I suspect it's because it's running the default VGA driver. The machine has an Intel 855 GME graphics adapter but there doesn't seem to be a WDDM driver available publicly. Lenovo's driver download page just says that drivers for Vista are bundled with the OS. Apparently, they aren't bundled with Windows 7 as it always defaults to a generic VGA driver. Is there a reliable way to get Sleep to work on this machine?

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  • C++: Template functor cannot deduce reference type

    - by maciekp
    I've got a functor f, which takes a function func and a parameter t of the same type as func. I cannot pass g to f because of compilation error (no matching function for call to f(int&, void (&)(int&)) ). If g would take non-reference parameter g(int s), compilation finishes. Or if I manually specify template parameter f(i, g), compilation also finishes. template<typename T> void f(T t, void (*func)(T)) {} void g(int& s) {} int main(int, char*[]) { int i = 7; f(i, g); // compilation error here return 0; } How can I get deduction to work?

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  • Spidermonkey pointing to a NSPR/DIST directory, HELP!

    - by giantKamote
    Hey guys, I've been trying to cross-compile Spidermonkey and I am stuck with the problem wherein prtypes.h(NSPR) is unrecognizable. I alread triedy modifying Makefile.ref/config.mk/jsconfig.mk to point to a desired NSPR/DIS directory. I must have missed some basic steps because it still won't make things work. Do you have any ideas on how to properly modify the makefiles to point my spidermonkey to the right NSPR libraries? Thanks!

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  • Git pre-receive hook to lunch PHP CodeSniffer

    - by Ralphz
    Hey. I'd like to check code committed to my remote git repository with PHP CodeSniffer and reject it if there are any problems code standards. Does anyone have an example how to use it on git remote repository or maybe example how to use it with pre-receive hook? Thanks.

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  • How should I port this Prototype to JQuery?

    - by blu
    There is currently this Prototype code that does a PUT: new Ajax.Request(someUrl, { method: 'put', parameters: { 'foo': bar }, onSuccess: function(response) { } .bind(this) }); I found this post but the solution uses an extra parameter supported by RoR, however I am targeting an ASP.NET backend. I searched a bit and found that not all browsers support PUT operations so apparently this could fail in certain browsers? This is already in prod, so a direct port would be fine for now I suppose. As an aside, what is the deal with the bind(this) in the onSuccess function?

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  • Volume Control in android application

    - by rantravee
    Hi, I'd like to know how to control my application's volume from the volume keys ( contrary to my belief , I've read they control only the ringer volume). Should I overwrite the onKey Down/Up ? , or is there other way to accomplish this ? . I'm asking because if I overwrite the upper mentioned function for an activity, then the functions will receive the event only if a view associated with the this activity has the focus, and I looking for something "Globaly" ( to work no matter what activity is running now)

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  • IPhone Objectvie C

    - by Sea
    I am trying to determine if a UILabel was touched and if so do something. Give .. . . . UILabel * site = [[UILabel alloc] initWithFrame:CGRectMake(0, 185, 320, 30)]; site.text = [retriever.plistDict valueForKey:@"url"]; site.textAlignment =UITextAlignmentCenter; site.backgroundColor = [UIColor clearColor]; site.textColor = [UIColor whiteColor]; site.userInteractionEnabled = YES; [theBgView addSubview:site]; [site release]; . . . Then I write the callback. - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{ retriever = [PListRetriever sharedInstance]; CGPoint pt = [[touches anyObject] locationInView: self]; NSURL *target = [[NSURL alloc] initWithString:[retriever.plistDict valueForKey:@"url"]]; [[UIApplication sharedApplication] openURL:target]; } The problem is right now, no matter where I touch in the View the Url is being opened. How do I determine if only just my label was touched?

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  • How to remove view from window?

    - by Wayfarer
    I am using Cocos2D for my main framework. In some cases, I want Cocos2D to load a nib file and have that be the view: window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; TargetPlayerViewController *myController = [[TargetPlayerViewController alloc]initWithNibName:@"TargetPlayerViewController" bundle:nil]; [window addSubview:[myController view]]; [window makeKeyAndVisible]; This works as expected, and shows the TargetPlayerViewController. Wonderful! What I need to know is: once that view has been loaded, how can I have the view remove itself? I've tried a few different ways, but all of them result in the program crashing. To test I have a button on the view set up which triggers this method: - (IBAction)GTFOnow:(id)sender { NSLog(@"GFTO"); window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; //[self.view removeFromSuperview]; //[window makeKeyAndVisible]; } In this method the view should remove itself from the view so I can go back to the Cocos2D. How do I do this?

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  • Can you cross-site ping another site using C# or JS/Ajax?

    - by Josh Harris
    On our web application I am trying to ping a 3rd party site to see if it is up before redirecting our customers to it. So far I have not seen a way to do this other than from a desktop app or system console. Is this possible? I have heard that there was an image trick in original ASP. Currently we are using .NET MVC with Javascript. Thank you, Josh

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  • setTimeout() not executing

    - by Ben Shelock
    I've got this simple function which displays a message to the user. If I add the timeout parameter it will slide back up automatically if not the user has to click it to get rid. But the timeout bit isn't working. function feedback(text, timeout){ $('#feedback').text(text).slideDown('fast'); $('#feedback').click(function(){ $(this).slideUp(); }); if(timeout){ setTimeout(function(){ $('#feedback').slideup(); }, timeout); } }

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  • Is using SharePoint as a intranet/extranet portal a good idea?

    - by Rob
    I work for a fortune 500 company in IT and we have developed many systems/applications to do a variety of things. We are in need of some commonality of these applications and a better portal/dashboard/landing page for these applications. So, our customers and employees would log into this portal and see all the "things" that they can do which then link to their own application. This could maybe just iframe in each application inside of this portal to keep brand and navigation consistency. We are trying to decide whether to use SharePoint 2007 or 2010 for this or develop a portal/dashboard of sorts in house. We would like this portal to look and feel very branded to our needs and really not even feel like its using SharePoint (if needed). An example is to provide our own Menu control that drives the navigation if needed. Does anyone have any pros/cons for using SharePoint in such a way? Any advice on implementation (e.g. use 2010, much easier to customize design than 2007, etc)?

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  • New to Android - Drawing a view at runtime

    - by Brian515
    HI all, I'm just getting started with developing for Android. I'm looking to port one of my iPhone applications, but I'm kind of at a loss for how to draw a view at runtime (a view not declared in the XML). Basically, I want to draw a simple rectangle, but then be able to manipulate its frame after being drawn. Sorry if this is a really, really simple question, but I can't seem to find some equivalent to the iPhone SDK here. Thanks in advance!

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  • REST, HTTP DELETE and parameters

    - by Chris McCauley
    Is there anything non-RESTful about providing parameters to a HTTP DELETE request? My scenario is that I'm modeling the "Are you sure you want to delete that?" scenario and eventually I end up having to pass a parameter to the delete request with "?force_delete=true" e.g. DELETE http://server/resource/id?force_delete=true If the user does not specify force_delete then I'm returning 409 Conflict - is that correct?

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  • C# Reading and Writing a Char[] to and from a Byte[] - Updated with Solution

    - by Simon G
    Hi, I have a byte array of around 10,000 bytes which is basically a blob from delphi that contains char, string, double and arrays of various types. This need to be read in and updated via C#. I've created a very basic reader that gets the byte array from the db and converts the bytes to the relevant object type when accessing the property which works fine. My problem is when I try to write to a specific char[] item, it doesn't seem to update the byte array. I've created the following extensions for reading and writing: public static class CharExtension { public static byte ToByte( this char c ) { return Convert.ToByte( c ); } public static byte ToByte( this char c, int position, byte[] blob ) { byte b = c.ToByte(); blob[position] = b; return b; } } public static class CharArrayExtension { public static byte[] ToByteArray( this char[] c ) { byte[] b = new byte[c.Length]; for ( int i = 1; i < c.Length; i++ ) { b[i] = c[i].ToByte(); } return b; } public static byte[] ToByteArray( this char[] c, int positon, int length, byte[] blob ) { byte[] b = c.ToByteArray(); Array.Copy( b, 0, blob, positon, length ); return b; } } public static class ByteExtension { public static char ToChar( this byte[] b, int position ) { return Convert.ToChar( b[position] ); } } public static class ByteArrayExtension { public static char[] ToCharArray( this byte[] b, int position, int length ) { char[] c = new char[length]; for ( int i = 0; i < length; i++ ) { c[i] = b.ToChar( position ); position += 1; } return c; } } to read and write chars and char arrays my code looks like: Byte[] _Blob; // set from a db field public char ubin { get { return _tariffBlob.ToChar( 14 ); } set { value.ToByte( 14, _Blob ); } } public char[] usercaplas { get { return _tariffBlob.ToCharArray( 2035, 10 ); } set { value.ToByteArray( 2035, 10, _Blob ); } } So to write to the objects I can do: ubin = 'C'; // this will update the byte[] usercaplas = new char[10] { 'A', 'B', etc. }; // this will update the byte[] usercaplas[3] = 'C'; // this does not update the byte[] I know the reason is that the setter property is not being called but I want to know is there a way around this using code similar to what I already have? I know a possible solution is to use a private variable called _usercaplas that I set and update as needed however as the byte array is nearly 10,000 bytes in length the class is already long and I would like a simpler approach as to reduce the overall code length and complexity. Thank Solution Here's my solution should anyone want it. If you have a better way of doing then let me know please. First I created a new class for the array: public class CharArrayList : ArrayList { char[] arr; private byte[] blob; private int length = 0; private int position = 0; public CharArrayList( byte[] blob, int position, int length ) { this.blob = blob; this.length = length; this.position = position; PopulateInternalArray(); SetArray(); } private void PopulateInternalArray() { arr = blob.ToCharArray( position, length ); } private void SetArray() { foreach ( char c in arr ) { this.Add( c ); } } private void UpdateInternalArray() { this.Clear(); SetArray(); } public char this[int i] { get { return arr[i]; } set { arr[i] = value; UpdateInternalArray(); } } } Then I created a couple of extension methods to help with converting to a byte[] public static byte[] ToByteArray( this CharArrayList c ) { byte[] b = new byte[c.Count]; for ( int i = 0; i < c.Count; i++ ) { b[i] = Convert.ToChar( c[i] ).ToByte(); } return b; } public static byte[] ToByteArray( this CharArrayList c, byte[] blob, int position, int length ) { byte[] b = c.ToByteArray(); Array.Copy( b, 0, blob, position, length ); return b; } So to read and write to the object: private CharArrayList _usercaplass; public CharArrayList usercaplas { get { if ( _usercaplass == null ) _usercaplass = new CharArrayList( _tariffBlob, 2035, 100 ); return _usercaplass; } set { _usercaplass = value; _usercaplass.ToByteArray( _tariffBlob, 2035, 100 ); } } As mentioned before its not an ideal solutions as I have to have private variables and extra code in the setter but I couldnt see a way around it.

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  • What web based programming environments exist to learn on?

    - by jjclarkson
    I loved appjet (the programming environment) before it was taken over by Google. What other web based complete programming environments are out there? Which one do you think is best for starting to do real world coding the fastest? I really think coding from your browser will make programming more accessible to the public. Are there any out there that use a vim style, (e.g. jsvi) in combination with free server side hosting? The last time I looked at Bespin it was a little green. Are there others?

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  • Font families on the iPhone

    - by PurplePilot
    Normally in a web app i would put a font-family in the CSS something like this " font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;" This way i cover my bases as to whether the target browser can handle the various fonts and will fail gracefully if it is missing some. However that are only a limited number of fonts on the iphone and presumably if you only specify one, say Helvetica, the iPhone will always have that font and use it. So i don't really need a font-family. Do I?

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  • Why does the following not work?

    - by Dony
    Hi, I tried to make the code #1 more terse by changing it to code #2 but it doesn't work as expected. Can anyone please tell me why it doesn't work? Thanks. Code #1 std::ostringstream q0; q0 << "(" << x << "," << y << "," << z << ")"; std::string s = q0.str(); Code #2 double x = 8.9, y = 3.4, z = -4.5; std::string s = static_cast<std::ostringstream &>( std::ostringstream() << "(" << x << "," << y << "," << z << ")").str();

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  • RMagick returns nil reading JPEG

    - by ysproduction
    When I try to open a JPEG format file in Rails using RMagick, it always return nil with any jpg file. Other file formats open well. $ script/console Loading development environment (Rails 2.3.4) >> require 'RMagick' >> img = Image.read("1.gif").first => 1.gif GIF 230x100 230x100+0+0 PseudoClass 256c 8-bit 2kb >> img = Image.read("1.png").first => 1.png PNG 1280x800 1280x800+0+0 DirectClass 8-bit 156kb >> img = Image.read("1.jpg").first => nil Why this happens?

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