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• LINQ return type

  - by nettguy

  When i declare var q=Enumerable.Range(1,10).where(c=c%2==0); will the extension method return IEnumerable or IQueryable?

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• C++: Return NULL instead of struct

  - by Rosarch

  I have a struct Foo. In pseudocode: def FindFoo: foo = results of search foundFoo = true if a valid foo has been found return foo if foundFoo else someErrorCode How can I accomplish this in C++? Edited to remove numerous inaccuracies.

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• Return all users from group(s) specified as comma delimited value

  - by todor

  I have the following two table scenario: users id groups 1 1,2,3 2 2,3 3 1,3 4 3 and groups id 1 2 3 How do I return the IDs of all users that belong to group 2 and 1 for example? Should I look into join, a helper group_membership table or function to separate the comma delimited group IDs to get something like this: group_membership user_id group_id 1 1 1 2 1 3 2 2 2 3 ... ...

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• Does COUNT(*) always return a result?

  - by Click Upvote

  If a do a query such as: SELECT COUNT(*) as num FROM table WHERE x = 'y' Will it always return a result, even when the query doesn't match any record? Or do i need to validate and make sure a row is returned as the result?

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• else or return?

  - by Ram

  Which one out of following two is best wrt to performance and standard practice. How does .NET internally handles these two code snippets? Code1 If(result) { process1(); } else { process2(); } Or Code 2 If(result) { process1(); return; } process2();

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• Upload multiple Images and Ping an address to upload them

  - by azz0r

  Hello! I am trying to allow administrators to upload 20-30 images in one go. I have tried jquery uploadify, SWFUpload and other various jquery scripts. However I have had many issues doing this. Uploadify worked fine, however it stopped working and after a day of debugging I couldn't figure out why (and by god, I tried to figure out why) So I have decided to try a java applet, however they all seem to cost quite abit of money. All I need is something to select some images, then each image upload pings and address where I can resize them in PHP, and done. Does anyone know a freeware solution thats easy to use?

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• Changing email of a contact in address book

  - by David

  Hey guys, I want to change the email of a contact in address book. my code is as follow. but somehow it doesnt work. do you know why? - (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person { CFErrorRef anError = NULL; ABMultiValueRef email = ABMultiValueCreateMutable(kABMultiStringPropertyType); NSString *personEmail = [conversationHistory getReceiver]; ABRecordSetValue(person, kABPersonEmailProperty, email, &anError); CFRelease(email); [self dismissModalViewControllerAnimated:YES]; return NO; }

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• client ip address in ASP.NET (.asmx) webservices

  - by Zain Shaikh

  I am using ASP.Net (.asmx) web services with Silverlight. since there is no way to find client ip address in Silverlight, therefore I had to log this on service end. these are some methods I have tried: Request.ServerVariables(”REMOTE_HOST”) HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"] HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; Request.UserHostAddress() Request.UserHostName() string strHostName = System.Net.Dns.GetHostName(); string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString(); All the above methods work fine on my local system, but when I publish my service on production server. it starts giving errors. Error: Object reference not set to an instance of an object. StackTrace: at System.Web.Hosting.ISAPIWorkerRequestInProc.GetAdditionalServerVar(Int32 index) at System.Web.Hosting.ISAPIWorkerRequestInProc.GetServerVariable(String name) at System.Web.Hosting.ISAPIWorkerRequest.GetRemoteAddress() at System.Web.HttpRequest.get_UserHostAddress()

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• Ip address of the client machine

  - by Zerotoinfinite

  Hi, Please let me know how to get the client IP address, I have tried all of the below things , but I am getting the same output 127.0.0.1 string strClientIP; strClientIP = Request.UserHostAddress.ToString(); string strHostName = System.Net.Dns.GetHostName(); string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString(); string ipaddress = string.Empty ; ipaddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (ipaddress == "" || ipaddress == null) ipaddress = Request.ServerVariables["REMOTE_ADDR"]; Please tel me how can I get the correct IP !

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• passport-linkedin-oauth2 not returning email address

  - by biborno

  here is my console.log(profile); { provider: 'linkedin', id: 'LJitOAshpU', displayName: 'Monist BD', name: { familyName: 'BD', givenName: 'Monist' }, emails: [ { value: undefined } ], _raw: '{\n "firstName": "Monist",\n "formattedName": "Monist BD",\n "id": " LJitOAshpU",\n "lastName": "BD"\n}', _json: { firstName: 'Monist', formattedName: 'Monist BD', id: 'LJitOAshpU', lastName: 'BD' } } here is my routing code: app.get('/auth/linkedin',passport.authenticate('linkedin', { scope: ['r_emailaddress', 'r_basicprofile', 'rw_nus'],state: 'DCEEFWF45453sdffef424' })); app.get('/auth/linkedin/callback',passport.authenticate('linkedin', { failureRedirect: '/' }),users.authCallback); here is passport.js config: passport.use(new LinkedInStrategy({ clientID: config.linkedIn.clientID, clientSecret: config.linkedIn.clientSecret, callbackURL: config.linkedIn.callbackURL, profileFields: ['id', 'first-name', 'last-name', 'email-address','public-profile-url'], passReqToCallback: true }, function(req,token, refreshToken, profile, done) { console.log(profile); })); why i m getting undefined in email values? :( it worked when i used passport-linkedin

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• Shark was unable to find symbol information for this address range - iPhone

  - by Elliot

  I'm trying to use Shark to determine which method(s) are taking the most time in my iPhone app. After sampling, I get this: Clicking the "!" button yields: Shark was unable to find symbol information for this address range. Typically this happens because the application was compiled without symbols or they have been subsequently stripped away. In Xcode, make sure the "Generate Debug Symbols" checkbox is selected (passes the -g flag to the compiler). Note that this does not affect code optimization, and does not typically alter performance significantly. However, the extra symbol information does consume significantly more space and may bloat the size of the executable. But I AM using the Debug option, and I am running on my Device. And Generate Debug Symbols IS checked. So what's wrong?

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• Access DotNetPanel/WebsitePanel Enterprise Server from outside the loopback address

  - by Ryan French

  Hi Peoples, I am currently investigating integration of DotNetPanel/WebsitePanel with a website that is running ColdFusion. The issue I have come across is that it seems WebsitePanel only allows access to the Enterprise Server (where the web services are that I need access to) when the request is coming from the same physical machine (i.e. on the loop-back address 127.0.0.1). This unfortunately doesnt really work out too well with our current setup as we have our ColdFusion server running on one machine and WebsitePanel running on another. Does anyone have any suggestions as to how we can change this? Currently we are investigating writing a transparent proxy server that will sit on the portal machine and pass requests between the two sites, but that is less than ideal.

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• Calculate broadcast address from ip and subnet mask

  - by Kolja

  Hi I want to calculate the broadcast address for e.g -IP 192.168.3.1 -Subnet 255.255.255.0 =192.168.3.255 in C. I know the way (doing fancy bitwise OR's between the inversed IP and Subnet), but my problem is I come from the green fields of MacOSX Cocoa programing. I looked into the source of ipcal, but wasn't able to integrate it into my code base. There must be a simple 10 line of code example somewhere on the internet, I just can't find it. Could someone point me to a 10 line of code example of how to do it in C. Cheers, Kolja

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• Setting WCF Endpoint address at runtime?

  - by james.ingham

  Hey, If I have the following: WSHttpBinding binding = new WSHttpBinding(); EndpointAddress endpoint = new EndpointAddress(new Uri("http://xxx:pppp/MyService")); MyServiceClient client = new MyServiceClient(binding, endpoint); How can I set the endpoint bindingConfiguration? If it helps my app.config is set to: <endpoint address="http://xxx:pppp/Design_Time_Addresses/WcfServiceLibrary/ManagementService/" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IManagementService" contract="ServiceReference.IManagementService"> <identity> <dns value="localhost" /> </identity> </endpoint> However I'm looking to let the user configure this before running the client. Thanks

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• wcf rest service 400 error : There might be a typing error in the address

  - by Lokesh Kondapalli

  I am trying to invoke wcf rest service from url but its showing error like this Error : Most likely causes: •There might be a typing error in the address. •If you clicked on a link, it may be out of date. ** I need JSON responce Here my code : Iservice.cs using System; using System.Collections.Generic; using System.Linq; using System.Runtime.Serialization; using System.ServiceModel; using System.ServiceModel.Web; using System.Text; namespace SampleRestSample { interface name "IService1" in both code and config file together. [ServiceContract] public interface IService1 { [OperationContract] [WebInvoke(Method = "GET", UriTemplate = "Book/{id}", BodyStyle = WebMessageBodyStyle.Wrapped, ResponseFormat = WebMessageFormat.Json)] List<Prasad> GetBookById(string id); } [DataContract] public class Prasad { [DataMember] public string Name { get; set; } [DataMember] public string Age { get; set; } } } Service1.svc.cs using System; using System.Collections.Generic; using System.Linq; using System.Runtime.Serialization; using System.ServiceModel; using System.ServiceModel.Web; using System.Text; namespace LoginRestSample { // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together. public class Service1 : SampleRestSample { List<Prasad> list = new List<Prasad>(); public List<Prasad> GetBookById(string id) { try { Prasad cls = new Prasad(); cls.Age = "24"; cls.Name = "prasad"; list.Add(cls); //int bookId = Convert.ToInt32(id); //using (SampleDbEntities entities = new SampleDbEntities()) //{ // return entities.Books.SingleOrDefault(book => book.ID == bookId); //} } catch { throw new FaultException("Something went wrong"); } return list; } } } web.config <?xml version="1.0" encoding="utf-8"?> <configuration> <system.web> <compilation debug="true" targetFramework="4.0"> <assemblies> <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> </assemblies> </compilation> </system.web> <system.serviceModel> <services> <service name="WcfRestSample.SampleRestSample"> <endpoint address="" behaviorConfiguration="restfulBehavior" binding="webHttpBinding" bindingConfiguration="" contract="WcfRestSample.ISampleRestSample" /> <host> <baseAddresses> <add baseAddress="http://localhost/SampleRestSample" /> </baseAddresses> </host> </service> </services> <behaviors> <endpointBehaviors> <behavior name="restfulBehavior"> <webHttp automaticFormatSelectionEnabled="true" /> </behavior> </endpointBehaviors> <serviceBehaviors> <behavior name=""> <serviceMetadata httpGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="false" /> </behavior> </serviceBehaviors> </behaviors> <serviceHostingEnvironment multipleSiteBindingsEnabled="true" /> </system.serviceModel> <system.webServer> <modules runAllManagedModulesForAllRequests="true" /> </system.webServer> </configuration> Any solutions? Thank you in advance.

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• Rails app is prepending tunnlr web address when using link helpers

  - by mathee

  I set up facebooker to tunnel my Ruby on Rails application. The issue is that I would like to test locally. That is, I don't want to have to start a tunnel every time I want to see my changes. Right now, when I start the application using ruby script/server (not calling rake facebooker:tunnel:background_start beforehand), links created by helpers (e.g., stylesheet_link_tag, javascript_include_tag, image_tag) are prepended with my tunnlr address: http://web1.tunnlr.com:myPort/. (For example, a CSS link looks like this in the page source: http://web1.tunnlr.com:myPort//stylesheets/appName.css?1234567890.) I don't want that functionality; I can't see my CSS or JavaScript changes without starting the tunnel first. I want the links to be relative to what's running on my machine, not the tunnel. So, stylesheet_link_tag should produce /stylesheets/appName.css?1234567890. Does anyone know why it's doing that in the first place and how to fix it? Thanks in advance.

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• Import CSV from url address and export as XML -- Rails

  - by Jeffrey

  Two questions: How can I import a file from a web address, without a form? Example: Organisation.import(:from = 'http://wufoo.com/report.csv') How can I use xml builder without pulling from the db? More Info My company uses wufoo for web forms. The data from wufoo is exported as csv files. To get the data into my company's cms, it needs to be formatted as xml. I don't need to store any of the data, aside from the url to the csv file. I thought this might work well as a simple rails app.

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• Verifying university membership/attendance via email address

  - by mettadore

  My client's web app allows members to sign up (Rails using AuthLogic) and those signups are limited in that they must be under the auspices of a university. To wit: A university organizer can sign up to be the representative of a university, and students can sign up as "attendees" of that university. I've been tasked with finding if there is a programmatic way to verify university membership/attendance. The only way I can see doing this is having a database of universities and a database of associated emails, and verifying that the student's email address is part of this database. That doesn't help if using Facebooker and AuthLogic's "sign up with Facebook credentials" ability, however. I suspect the answer to this is "via human intervention," and that this is something we can't solve programmatically. Either we, or the university, will have to bite the bullet and check records. However, I'd thought I'd ask if anyone else has run into the issue of verification of university membership before.

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• nested page-faulting of user-space address in Linux

  - by shankar

  Hi, I would like to know if it is functionally wrong to page-fault a user-space address when kernel is running fault-handler to bring in a user-page. OS is Linux 2.6.30 Assume that both user-addresses are valid ( falling within vma , rw permission ) for the task. When I check the kernel code, i find that the kernel does not mind the nested fault if the faulted-addresses are valid and the fault did not occur in atomic-context or in irq handler. (I dont think the answer is cpu-specific, but I would add that i am interested in arm and mips ). eg : The scenario can happen if I print stack-data from page-fault handler. thanks shankar

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• About Network Address Translation (NAT)?

  - by Rudi

  Just curious about a particular scenario of NAT. Let's suppose we have 4 computers sharing a global IP address under the NAT. I understand that the NAT box keeps an internal record to know which computer to forward requests to. But let's say on computer #2 I'm trying to download a file. And let's say on computer #1, #3, and #4, I'm just browsing the web normally. When the browser initiates a TCP connection to get that file, how does it know which computer to give it to? I mean like, each of the four computers is using port 80 to browse the web right? How does the NAT's record distinguish which "port 80" belongs to which computer?

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• Search a variable for an address

  - by chrissygormley

  Hello, I am trying to match information stored in a variable. I have a list of uuid's and ip addresses beside them. The code I have is: r = re.compile(r'urn:uuid:5EEF382F-JSQ9-3c45-D5E0-K15X8M8K76') m = r.match(str(serv)) if m1: print'Found' The string serv contains is: urn:uuid:7FDS890A-KD9E-3h53-G7E8-BHJSD6789D:[u'http://10.10.10.20:12365/7FDS890A-KD9E-3h53-G7E8-BHJSD6789D/'] --------------------------------------------- urn:uuid:5EEF382F-JSQ9-3c45-D5E0-K15X8M8K76:[u'http://10.10.10.10:42365'] --------------------------------------------- urn:uuid:8DSGF89S-FS90-5c87-K3DF-SDFU890US9:[u'http://10.10.10.40:5234'] --------------------------------------------- So basically I am wanting to find the uuid string and find out what it's address is and store it as a variable. So far I have just tried to get it to match the string to no avail. Can anyone point out a solution to this. Thanks

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• Strange Google Maps v3 geocode behavior when a quote is in the address

  - by AlexV

  See my test page. When on the page, click the top left button "Geocode". If you are in Firefox, geocoder.geocode() will have it's status equal to ERROR (and pop an alert after a few seconds). In Internet Explorer (at least 7), everything is fine and the marker is added to the map. If you remove the quote from the address (l'Assomption -- lAssomption), everything execute fine in Firefox. Now with my question: how a quote can "crash" the Google Maps V3 API only in Firefox!?

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• How to return focus from GridView or DataGrid to other control on the page

  - by Senthilkumar

  I Want to know how to focus to control after completing tab navigation for the grid view. I have certain controls in my page and GridView/DataGrid as last control, when I navigate (Tab key navigation) on my page. I can navigate from first control to GridView but when I finish all editable items in grid the tab control goes to browser address bar. I need this should focus to again first control on the page. My question is how can I do this? If it is an ordinary controls then I can use (on key down) attribute of the same.. here how can I get access to the last row's last column on the grid view.

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• Winsock failed to connect to local ip address

  - by JKS

  I have used the following code in a form that acts like a server, WskServer(0).Close LocalIP = WskServer(0).LocalIP WskServer(0).LocalPort = DEFAULT_TCP_PORT WskServer(0).Protocol = sckTCPProtocol txtStatus.Text = "Starting server" Call WskServer(0).Bind(DEFAULT_TCP_PORT, LocalIP) WskServer(0).Listen when i execute above code,i received the following error "Address is not available from the local machine" . If i changed the line Call WskServer(0).Bind(DEFAULT_TCP_PORT, LocalIP) to Call WskServer(0).Bind(DEFAULT_TCP_PORT, "127.0.0.1") this is working What's wrong with the code?, can anybody give the fix Update I just removed the line Call WskServer(0).Bind(DEFAULT_TCP_PORT, LocalIP) now server working properly. this way is correct or not

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• BlazeDS rejected connection from some IP address

  - by Shamal Karunarathne

  Hi, I'm using the BlazeDS binary version with Apache tomcat 6.0. And it seems there's a developer mode active and it only allows 3 IPs to connect to the application (Server). This is what the log says: [BlazeDS]MessageBroker '__default__' rejected connection from address 'xxx.xxx.xx.x'; Developer mode addresses already in use: xxx.x.xxx.xx, xxx.xxx.xxx.xxx, xx.xxx.xxx.xx (IP addresses are masked with 'x' for privacy) I have not added any special configuration to make developer mode active. I couldn't find any resources related to this scenario either. Please help. Thanks in Advance.

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