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• Converting between unsigned and signed int safely

  - by polemic

  I have an interface between a client and a server where a client sends (1) an unsigned value, and (2) a flag which indicates if value is signed/unsigned. Server would then static cast unsigned value to appropriate type. I later found out that this is implementation defined behavior and I've been reading about it but I couldn't seem to find an appropriate solution that's completely safe? I've read about type punning, pointer conversions, and memcpy. Would simply using a union type work? A UnionType containing signed and unsigned int, along with the signed/unsigned flag. For signed values, client sets the signed part of the union, and server reads the signed part. Same for the unsigned part. Or am I completely misunderstanding something? Side question: how do I know the specific behavior in this case for a specific scenario, e.g. windriver diab on PPC? I'm a bit lost on how to find such documentation.

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• How to avoid exceptions catches copy-paste in .NET

  - by Budda

  Working with .NET framework I have a service with a set of methods that can generates several types of exceptions: MyException2, MyExc1, Exception... To provide proper work for all methods, each of them contains following sections: void Method1(...) { try { ... required functionality } catch(MyException2 exc) { ... process exception of MyException2 type } catch(MyExc1 exc) { ... process exception of MyExc1 type } catch(Exception exc) { ... process exception of Exception type } ... process and return result if necessary } It is very boring to have exactly same stuff in EACH service method with exactly same exceptions processing functionality... Is there any possibility to "group" these catch-sections and use only one line (something similar to C++ macros)? Probably something new in .NET 4.0 is related to this topic? Thanks. P.S. Any thoughts are welcome.

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• How to accomplish "AuthType None" in Apache 2.2

  - by Technorati

  http://httpd.apache.org/docs/trunk/mod/mod_authn_core.html#authtype talks about "AuthType None", and has an awesome example of exactly what I need to do - unfortunately, it appears to be new to 2.3/2.4. Is there any equivalent feature in 2.2? The authentication type None disables authentication. When authentication is enabled, it is normally inherited by each subsequent configuration section, unless a different authentication type is specified. If no authentication is desired for a subsection of an authenticated section, the authentication type None may be used; in the following example, clients may access the /www/docs/public directory without authenticating: <Directory /www/docs> AuthType Basic AuthName Documents AuthBasicProvider file AuthUserFile /usr/local/apache/passwd/passwords Require valid-user </Directory> <Directory /www/docs/public> AuthType None Require all granted </Directory>

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• What is a django QuerySet?

  - by gath

  Guys, When i do this >>> b = Blog.objects.all() >>> b i get this >>>[<Blog: Blog Title>,<Blog: Blog Tile>] When i query what type b is, >>> type(b) i get this >>> <class 'django.db.models.query.QuerySet'> What does this mean? is it a data type like dict, list etc? An example of how i can build data structure like a QuerySet will be appreciated. I would want to know how django build that QuerySet (the gory details) Gath.

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• PHP Xml add edit delete

  - by user560411

  Hi there. I am kind of new and I have the following XML structure an I would like to have codes that INSERTS DELETES Delete an entire element based on it's TITLE value. EDIT Replace Publisher's value with another value <Game type="XXX"> <TITLE>XXX</TITLE> <PUBLISHER>XXX</PUBLISHER> </Game> This is my XML structure <Game type="adventure"> <TITLE>Assassin's Creed: Brotherhood</TITLE> <PUBLISHER>Ubisoft</PUBLISHER> </Game> <Game type="adventure"> <TITLE>Batman: Arkham Asylum</TITLE> <PUBLISHER>Eidos</PUBLISHER> </Game> </GameStore> Any help would be great and thank you in avdance!

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• How do I put all types implementing a certain generic interface in a dictionary?

  - by James Wenday

  Given a particular interface ITarget<T> and a particular type myType, here's how you would determine T if myType implements ITarget<T>. (This code snippet is taken from the answer to an earlier question.) foreach (var i in myType.GetInterfaces ()) if (i.IsGenericType && i.GetGenericTypeDefinition() == typeof(ITarget<>)) return i.GetGenericArguments ()[0] ; However, this only checks a single type, myType. How would I create a dictionary of all such type parameters, where the key is T and the value is myType? I think it would look something like this: var searchTarget = typeof(ITarget<>); var dict = Assembly.GetExecutingAssembly().[???] .Where(t => t.IsGenericType && t.GetGenericTypeDefinition() == searchTarget) .[???]; What goes in the blanks?

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• Display the text label for selected radio button in Jquery

  - by Thinker

  Hai, I have a group of radio buttons, i could able to pick the selected value using jQuery but not the text label for selected values. for ex: <input type="radio" value="1" name="priority">High</input> <input type="radio" value="2" name="priority">Medium</input> <input type="radio" value="3" name="priority">Low</input> JQUERY CODE TO PICK THE SELECTED VALUE jQuery('input:radio[name=priority]').change(function() { var priority_type=jQuery(this).attr("value"); alert(priority_type); } OUTPUT would be any one of the following (1,2,3) Now my requirement is, i would like to display the label of the selected values for eg (high or low or medium) depends on the selection of the radio button. Hope this helps. let me know if you have any question. Kindly help me in this task

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• SSIS: Update a RecordSet passed into a VB.NET ScriptTask

  - by Zambouras

  What I am trying to accomplish is using this script task to continually insert into a generated RecordSet I know how to access it in the script however I do not know how to update it after my changes to the DataTable have been made. Code is Below: Dim EmailsToSend As New OleDb.OleDbDataAdapter Dim EmailsToSendDt As New DataTable("EmailsToSend") Dim CurrentEmailsToSend As New DataTable Dim EmailsToSendRow As DataRow EmailsToSendDt.Columns.Add("SiteMgrUserId", System.Type.GetType("System.Integer")) EmailsToSendDt.Columns.Add("EmailAddress", System.Type.GetType("System.String")) EmailsToSendDt.Columns.Add("EmailMessage", System.Type.GetType("System.String")) EmailsToSendRow = EmailsToSendDt.NewRow() EmailsToSendRow.Item("SiteMgrUserId") = siteMgrUserId EmailsToSendRow.Item("EmailAddress") = siteMgrEmail EmailsToSendRow.Item("EmailMessage") = EmailMessage.ToString EmailsToSend.Fill(CurrentEmailsToSend, Dts.Variables("EmailsToSend").Value) EmailsToSendDt.Merge(CurrentEmailsToSend, True) Basically my goal is to create a single row in a new data table. Get the current record set, merge the results so I have my result DataTable. Now I just need to update the ReadWriteVariable for my script. Do not know if I have to do anything special or if I can just assign it directly to the DataTable I.E. Dts.Variables("EmailsToSend").Value = EmailsToSendDt Thanks for the help in advanced.

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• How can I align the left edge of HTML form elements using CSS?

  - by Naor

  I want to do the following: aa: ________ bbbb: ________ ccc: ________ So I wrote: <span>aa:</span><input type="text" /><br/> <span>bbbb:</span><input type="text" /><br/> <span>cc:</span><input type="text" /> And I get: aa:________ bbbb:________ ccc:________ I know I can arrange it easy with table. How do I do it without tables with as few css as I can. Thanks.

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• ActionController::InvalidAuthenticityToken: verified with authentication token on the form!

  - by goodwill

  I don't know why it happens but my form for some reason does not post properly. I am very sure the form contains the required authentication token: <form action="/account/complete_verify_email/4df78710-e27b-4527-bd2d-71cd2e9a1271" method="post"><div style="margin:0;padding:0"><input name="authenticity_token" type="hidden" value="341b07dfa682ed11a045e19956e2e3f5f499e8cb"></div> <input id="password" name="password" type="password"> <input name="commit" type="submit" value="Continue"> </form> Note the authenticity_token is there. What happened? And YOU KNOW WHAT? Quitting Safari and restart again solved the issue... but I can't think of what kind of intermittent behaviour could cause such problem.

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• DBCC CHECKDB WITH DATA_PURITY gives out of range error

  - by Mark Allison

  Hi there, I have restore a SQL Server 2000 database onto SQL Server 2005 and then run DBCC CHECKDB WITH DATA_PURITY and I get this error: Msg 2570, Level 16, State 3, Line 2 Page (1:19558), slot 13 in object ID 181575685, index ID 1, partition ID 293374720802816, alloc unit ID 11899744092160 (type "In-row data"). Column "NumberOfShares" value is out of range for data type "numeric". Update column to a legal value. The column NumberOfShares is a numeric (19,6) data type. If I run the following select max (NumberOfShares) from AUDIT_Table select min (NumberOfShares) from AUDIT_Table I get: 22678647.839110 -1845953000.000000 These values are inside the bounds of a numeric (19,6) so I'm not sure why the DBCC check fails. Any ideas to find out why it fails? Do I need to use DBCC PAGE? How would you troubleshoot this? Thanks, Mark.

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• How to pass json via a form element

  - by becomingGuru

  I have this swf (flash) file that provides the json that needs to be sent to the server. I wrote a very simple jQuery: function submitForm(swf_json) { $('#swfjson').val(swf_json); #swfjson is an input of type hidden $('#titleForm').submit(); } and the swf will call the submitForm above and I receive the request.POST in django as usual. But, django is interpreting the swf_json as a string "Object object" >>>type(request.POST['swfjson']) <type 'unicode'> Of course I can pass the json as a string to the view function. Doesn't seem good to me. Any other way of passing the json object to the django view?

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• Not all symbols of an DLL-exported class is exported (VS9)

  - by mandrake

  I'm building a DLL from a group of static libraries and I'm having a problem where only parts of classes are exported. What I'm doing is declaring all symbols I want to export with a preprocessor definition like: #if defined(MYPROJ_BUILD_DLL) //Build as a DLL # define MY_API __declspec(dllexport) #elif defined(MYPROJ_USE_DLL) //Use as a DLL # define MY_API __declspec(dllimport) #else //Build or use as a static lib # define MY_API #endif For example: class MY_API Foo{ ... } I then build static library with MYPROJ_BUILD_DLL & MYPROJ_USE_DLL undefined causing a static library to be built. In another build I create a DLL from these static libraries. So I define MYPROJ_BUILD_DLL causing all symbols I want to export to be attributed with __declspec(dllexport) (this is done by including all static library headers in the DLL-project source file). Ok, so now to the problem. When I use this new DLL I get unresolved externals because not all symbols of a class is exported. For example in a class like this: class MY_API Foo{ public: Foo(char const* ); int bar(); private: Foo( char const*, char const* ); }; Only Foo::Foo( char const*, char const*); and int Foo::bar(); is exported. How can that be? I can understand if the entire class was missing, due to e.g. I forgot to include the header in the DLL-build. But it's only partial missing. Also, say if Foo::Foo( char const*) was not implemented; then the DLL build would have unresolved external errors. But the build is fine (I also double checked for declarations without implementation). Note: The combined size of the static libraries I'm combining is in the region of 30MB, and the resulting DLL is 1.2MB. I'm using Visual Studio 9.0 (2008) to build everything. And Depends to check for exported symbols.

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• How to disable expand sign in Swing JTree?

  - by user2899630

  I'm working in Swing and I would like to disable the expand (plus [+]) sign on a certain type of nodes. Not sure how to do it because my nodes aren't leaves and I also cannot use setShowsRootHandles (which is only for the root). I'm referring to to JTree: suppose i got this structure: Root --[+] node1 --[+] node2 when I load this structure i would like not to see the [+] sign on node2 (because it a special type node). But I also would like to expand it by using a special command. I've overridden isLeaf() (method from DefaultMutableTreeNode) so it would set to to TRUE when i'm in the special type node, but then when I'm trying to expand it, it wouldn't expand because isLeaf() == TRUE... Hope this will make things more clear.

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• VS 2010 / Resharper 5 Mouse Behavior

  - by Berryl

  After upgrading to the above configuration I notice that 1) CTRL-Click on a type highlights the type but doesn't take me to the declaration, 2) Clicking on some closure (ie, like a method) toggles whether it's expanded or collapsed. Since these are both mouse related tasks I figure there is some setting in either VS or R# that I need to change, but I sure can't figure out what it is. Anybody know? Cheers, Berryl PS - there is an option in R# to ctrl-click to the type but I have that checked and it still does not work.

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• Razor View Engine and jQuery

  - by rjovic

  Hi, does anybody know how to force Razor View engine to print exact line which is under foreach loop. Code follows : @section head{ <script type="text/javascript" src="@Url.Content("~/Content/Scripts/jquery-1.4.1.js")"></script> <script type="text/javascript" src="@Url.Content("~/Content/Scripts/jquery.progressbar.min.js")"></script> <script type="text/javascript"> $(document).ready(function() { @foreach(var player in Model) { jQuery("#pb@PlayerID").progressBar(); } }); </script> } I tried using $() and jQuery() but in both case razor don't know what to do. Is there any way to force him to print exact this : jQuery("#pb@PlayerID").progressBar(); . I want to have something like this : $(document).ready(function() { $("#pb1").progressBar(); $("#pb2").progressBar(); $("#pb3").progressBar(); }); Thank you in advance!

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• How do you override an existing html form to use jquery to post the form?

  - by Chris

  I have a simple form that I am currently posting back to the server to update a nickname. What jquery code do I add (without changing the form) so that the page will not refresh, but instead jquery will post the form in the background and then pop up an alert message containing the reply back from the server? <form method="post" action="http://www.myserver.com/update_nickname" name="input"> Quick form to test update_nickname:<br> New nickname:<input type="text" value="BigJoe" name="newNickname"><br> <input type="submit" value="Submit"> </form> <script src="jquery-1.4.2.min.js" type="text/javascript"> </script>

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• Problem with layout of control when dynamically creating winform and controls for the Form

  - by Ashwani Roy

  I get this response from a web service call. Something like this <Response> <Control1 type = "DropdownList" value= "USA,UK,Sweden,UAE"/> <Control2 type = "Textbox" value= "Contries"/> <Control3 type = "Button" value= "None"> </Response> Based on this I de-serialize it into List<Controls>. Now I need to be able to dynamically create a winform based on these controls. My problem is the layout. I want to be able to create them nicely separated (If possible vertically aligned) in batches of lets say 5.So If I need 15 controls I have 3 columns and 5 rows. What would be best way to achieve this? I know that I can use the inbuilt positioning properties like top, width etc., but maybe someone out there has done something similar in a better way.

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• Build Path issue with Java Android project when starting Eclipse

  - by Matt Smith

  I booted up eclipse to start on a project, and without typing in a word I already have several errors. package department.namespace; import android.app.Activity; import android.os.Bundle; public class DepartmentActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } } At package department.namespace, it says: multiple marks at this line and the type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files The import android.os cannot be resolved. Override cannot be resolved as a type The method OnCreate(Bundle) is undefined for the type Activity R. cannot be resolved as a variable. Since this JUST came up when I started Eclipse, how do I fix this?

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• How does the " is " operator work internally

  - by JDMX

  I want to compare the type of an object to a type to see if they are the same. I do not have the object, just the type of the object. I can do type1 == type2 and get general equality I can have a recursive loop where I repeat the above step for type1.BaseType until the BaseType is null. I can do type1.GetInterface( type2.FullName ) != null to check if type2 is an interface of type1 If I put it all together, I get if ( type2.IsInterface ) return type1.GetInterface( type2.FullName ) != null; while ( type1 != null ) { if ( type1 == type2 ) return true; type1 = type1.BaseType; } return false; Is that all the is keyword is. I cannot find the right keyword to plug into the Reflector search to find the function and a google search on "is" was not really helpful

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• What's the key sequence to run a function by typing the function name in emacs?

  - by paracaudex

  Suppose I add a new word count function to my .emacs file to count words: (defun word-count nil "Count words in buffer" (interactive) (shell-command-on-region (point-min) (point-max) "wc -w")) I remember there being a way to run a function by typing the function name, but I don't remember how. What key sequence do I type before I type word-count, enter?

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• Is it possible to use JavaScript to submit an unnamed form from outside an iFrame?

  - by Scott

  I know that may sound silly, but I'm trying to submit a form on a page inside an iFrame, from the parent site. Here's an example of the form: <form action="/add_email" method="post"> <div class="field"> <label for="newEmailAddress" style="width: auto">Add new email address</label> <input type="text" id="newEmailAddress" name="email" value="null" class="text-field" /> <input type="hidden" name="__app_key" value="null"/> <input type="submit" value="Add address and send activation email"> </div> </form> As you can see, the Submit button, and the form itself both lack a proper name or id, this is not something I have control over. (It's on an external website.) Any suggestions?

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• Why does the following Javascript/form not work?

  - by joshim5

  <form> <input type="text" id="inputbox" value="hello"/> <input type="submit" value="Convert" onClick="convert(document.getElementById("inputbox"))"/> </form> <script type="text/javascript"> function convert (text) { alert(text); return text; </script> This also does not work when I change alert to document.write. I obviously have more HTML to go along with this. Thanks!

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• Why is my form triggering the wrong controller action?

  - by COCoach

  This form has multiple submit buttons, when clicked, it calls a simple JavaScript function to change the value of a hidden input (function is called "setHidden". This worked before, after some other not relevant code, it has ceased working. Essentially, the action it is supposed to call is never called, instead it seems to default back to a previous URL. The Form: <form action="/League/RemoveOwner" method="post"> <input type="hidden" value="1007" name="lid"/> <input type="hidden" value="0" id="index" name="index"/> <input type="image" src="../../Resources/Images/Delete.png" height="12" alt="Remove Owner" title="Remove Owner" onclick="setHidden('index', '1031')"/></a> coach<br /> </form> The Controller: [HttpPost] public ActionResult RemoveOwner(int id, string index) { //yada return PartialView(); } When clicking the image, it should call the remove owner controller, instead it calls the "View" controller: public ActionResult View(int id) { //yada return View(); }

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• git private server error: "Permission denied (publickey)."

  - by goddfree

  I followed the instructions here in order to set up a private git server on my Amazon EC2 instance. However, I am having problems when trying to SSH into the git account. Specifically, I get the error "Permission denied (publickey)." Here are the permissions of my files/folders on the EC2 server: drwx------ 4 git git 4096 Aug 13 19:52 /home/git/ drwx------ 2 git git 4096 Aug 13 19:52 /home/git/.ssh -rw------- 1 git git 400 Aug 13 19:51 /home/git/.ssh/authorized_keys Here are the permissions of my files/folders on my own computer: drwx------ 5 CYT staff 170 Aug 13 14:51 .ssh -rw------- 1 CYT staff 1679 Aug 13 13:53 .ssh/id_rsa -rw-r--r-- 1 CYT staff 400 Aug 13 13:53 .ssh/id_rsa.pub -rw-r--r-- 1 CYT staff 1585 Aug 13 13:53 .ssh/known_hosts When checking my logs in /var/log/secure, I used to get the following error message every time I tried to SSH: Authentication refused: bad ownership or modes for file /home/git/.ssh/authorized_keys However, after making a few permission changes, I no longer get this error message. Despite this, I am still getting the "Permission denied (publickey)." message every time I try to SSH. The command I am using to SSH is ssh -T git@my-ip. Here is the full log I get when I run ssh -vT [email protected]: OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011 debug1: Reading configuration data /etc/ssh_config debug1: /etc/ssh_config line 20: Applying options for * debug1: Connecting to my-ip [my-ip] port 22. debug1: Connection established. debug1: identity file /Users/CYT/.ssh/id_rsa type -1 debug1: identity file /Users/CYT/.ssh/id_rsa-cert type -1 debug1: identity file /Users/CYT/.ssh/id_dsa type -1 debug1: identity file /Users/CYT/.ssh/id_dsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.2 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.2 debug1: match: OpenSSH_6.2 pat OpenSSH* debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr [email protected] none debug1: kex: client->server aes128-ctr [email protected] none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Server host key: RSA 08:ad:8a:bc:ab:4d:5f:73:24:b2:78:69:46:1a:a5:5a debug1: Host 'my-ip' is known and matches the RSA host key. debug1: Found key in /Users/CYT/.ssh/known_hosts:1 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Trying private key: /Users/CYT/.ssh/id_rsa debug1: Trying private key: /Users/CYT/.ssh/id_dsa debug1: No more authentication methods to try. Permission denied (publickey). I have spent a few hours going through threads on various sites, including SO and SF, looking for a solution. It seems that the permissions for my files are all okay, but I just can't figure out the problem. Any help would be greatly appreciated. Edit: EEAA: Here are the outputs you requested: $ getent passwd git git:x:503:504::/home/git:/bin/bash $ grep ssh ~git/.ssh/authorized_keys | wc -l grep: /home/git/.ssh/authorized_keys: Permission denied 0

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