Search Results

Search found 13788 results on 552 pages for 'instance'.

Page 331/552 | < Previous Page | 327 328 329 330 331 332 333 334 335 336 337 338  | Next Page >

• Avoiding a NullReferenceException

  - by Nikhil K

  I have used this code for extracting urls from web page.But in the line of 'foreach' it is showing Object reference not set to an instance of an object exception. What is the problem? how can i correct that? WebClient client = new WebClient(); string url = "http://www.google.co.in/search?hl=en&q=java&start=10&sa=N"; string source = client.DownloadString(url); HtmlDocument doc = new HtmlDocument(); doc.LoadHtml(source); foreach (HtmlNode link in doc.DocumentNode.SelectNodes("//a[@href and @rel='nofollow']")) { Console.WriteLine(link.Attributes["href"].Value); }

  Read the article

• NSThread running a class

  - by Thomas Joulin

  Hi, Every the example I find on the internet (including Apple doc) sets the target to self like this : [NSThread detachNewThreadSelector:@selector(threadedTask) toTarget:self withObject:nil]; Since i would like to do a more complex task in background (involving multiple methods), I thought of creating a class Task called like this : Task *task = [[Task alloc] init]; [NSThread detachNewThreadSelector:@selector(main) toTarget:task withObject:nil]; but I wonder, how will be handled the instance variables of my class Task ? in my method main can I safely call methods of my class Task using [self myMethod] and modifying members variables assuming I'm the only thread accessing it ? This way of handling threads seems weird to me, sorry if my question is stupid ^^ Thanks in advance

  Read the article

• Writing from an array to a file bash and new lines

  - by S1syphus

  I'm trying to write a script the generates a template file for Pashua (a perl script for creating GUI on osx) I want to crate an instance for each item in the array, so the ideal output would be: AB1.type = openbrowser AB1.label = Choose a master playlist file AB1.width=310 AB1.tooltip = Blabla filesystem browser AB2.type = openbrowser AB2.label = Choose a master playlist file AB2.width=310 AB2.tooltip = Blabla filesystem browser ...and so on for the rest of the array: What I am using to write to the text file at the moment is: count=1 saveIFS="$IFS" IFS=$'\n' array=($(<TEST.txt)) IFS="$saveIFS" for i in "${array[@]}"; do declare AD$count="$i"; ((count++)); done for i in "${array[@]}"; do echo "AD$count".type = openbrowser "AD$count".label = Choose a master playlist file \n "AD$count".width=310 \n "AD$count".tooltip = Blabla filesystem browser \n" >> long.txt; done However \n doesn't produce a newline in the text file, and I am pretty sure there is a alot nicer way todo this, ideas?

  Read the article

• Excel macro send rich mail using LotusNotes

  - by CC

  Hi everybody. I'm working on a small macro to send mail from excel 2007 using my Lotus Notes session. The sending mail part is working fine. Now I need to send in the body part, a part of a stylesheet (for instance the area from A1:B20). This area has colors, bold font. To send my email here is the code: Set oSess = CreateObject("Notes.NotesSession") Set oDB = oSess.GETDATABASE("", "") Call oDB.OPENMAIL flag = True If Not (oDB.IsOpen) Then flag = oDB.Open("", "") If Not flag Then MsgBox "Can't open mail file: " & oDB.SERVER & " " & oDB.FILEPATH End If On Error GoTo err_handler 'Building Message Set oDoc = oDB.CREATEDOCUMENT Set oItem = oDoc.CREATERICHTEXTITEM("BODY") oDoc.Form = "Memo" 'mail subject oDoc.Subject = "subject" 'mail body oDoc.sendto = "[email protected]" oDoc.body = "my text" oDoc.postdate = Date oDoc.SaveMessageOnSend = True oDoc.visable = True 'Sending Message oDoc.SEND False Does anybody has an idea about how to send a stylesheet ? Thanks alot.

  Read the article

• How do I fix this NameError?

  - by Kyle Kaitan

  I want to use the value v inside of an instance method on the metaclass of a particular object: v = ParserMap[kind][:validation] # We want to use this value later. s = ParserMap[kind][:specs] const_set(name, lambda { p = Parser.new(&s) # This line starts a new scope... class << p define_method :validate do |opts| v.call(self, opts) # => NameError! The `class` keyword above # has started a new scope and we lost # old `v`. end end p }) Unfortunately, the class keyword starts a new scope, so I lose the old scope and I get a NameError. How do I fix this?

  Read the article

• What is the "task" in twitter Storm parallelism

  - by John Wang

  I'm trying to learn twitter storm by following the great article "Understanding the parallelism of a Storm topology" However I'm a bit confused by the concept of "task". Is a task an running instance of the component(spout or bolt) ? A executor having multiple tasks actually is saying the same component is executed for multiple times by the executor, am I correct ? Moreover in a general parallelism sense, Storm will spawn a dedicated thread(executor) for a spout or bolt, but what is contributed to the parallelism by an executor(thread) having multiple tasks ? I think having multiple tasks in a thread, since a thread executes sequentially, only make the thread a kind of "cached" resource, which avoids spawning new thread for next task run. Am I correct? I may clear those confusion by myself after taking more time to investigate, but you know, we both love stackoverflow ;-) Thanks in advance.

  Read the article

• Select no tabs in a UITabBar

  - by Tom

  Hi, I'm trying to select no tabs at all in my application. At first the first tab is selected, but I'd like to deselect it so no tabs at all would be selected. Don't ask me why, it's just that way the client wants it! hehe Thanks for your help! PS: I already tried: // rootController = UITabBarController rootController.tabBar.selectedItem = 0; rootController.tabBar.selectedItem = nil; [rootController setSelectedIndex:[rootController.items objectAtIndex:0]]; [rootController setSelectedIndex:nil]; [rootController setSelectedIndex:0]; // That one works : (but I can't select 0 or -1 for instance) [rootController setSelectedIndex:2]; Any ideas? Thanks again!

  Read the article

• How do I pass custom variables to javascript events?

  - by RoboShop

  I have a user control with a javascript function which references some controls within the user control. This user control works perfectly when there is only one instance of it, but I'm now building a page where I have two instances of the user control. In IE7, it works fine, but in FireFox, it is getting confused that there is two functions of the exact same name and signature. So on UserControl1, it'll be running the function in UserControl2 and modifying that content. I'm thinking my best solution would be to pass the clientID of the components I need TO the function instead of just directly referencing it in the function. How would I do that? The signature of the javascript function is like this function nodeClicking(sender, args) and I'm calling it in an event like this <telerik:RadTreeView runat="server" ID="OrgUnitTreeView" OnInit="TreeViewLoad" OnClientNodeClicking="**nodeClicking**" EnableViewState="true" DataTextField = "OrganisationUnitName" DataValueField = "OrganisationUnitCode" DataFieldParentID = "ParentOrganisationUnitCode" DataFieldID = "OrganisationUnitCode"> How do I add extra variables to the function signature.

  Read the article

• How to build boost foreach cycle

  - by Ockonal

  Hi guys! I have some abstract class called IClass (has pure virtual function). There are some classes which inherit IClass: CFirst, CSecond. I want to add objects of classes which inherit into boost::ptr_vector: class IClass { virtual void someFunc() = 0; }; class CFirst : public IClass { }; class CSecond : public IClass { }; boost::ptr_vector<IClass> objectsList; objectsList.push_back(new CFirst()); objectsList.push_back(new CSecond()); And now my goal is to call function (which is declarated in IClass) from all objects in objectsList. I'd prefer to use BOOST_FOREACH: foreach(IClass tempObj, objectsList) { tempObj.someFunc(); } The problem is that IClass - abstract class, so I can't make instance of it for the foreach-cycle. What should I do?

  Read the article

• Reverting back to previous ADT plugin

  - by sdfwer

  Now I was wondering if anyone has been able to accomplish reverting to a previous ADT plugin. The reason for this is because I am using an open source jar and I am getting the following errors on my LogCat such as: unable to resolve virtual method unable to find class referenced in signature unable to resolve new-instance The effect of this causes an error on running my android application on the debugger. I was using android ADT 15 before now I am updated to 17. Please help on finding a solution to resolve the issue. Edit* Forgot to add in The error "java.lang.NoClassDefFoundError". In simple terms it can't find classes or methods the attached jar even though it allows it.

  Read the article

• Modelling a manyToMany relationship with attributes

  - by Javi

  Hello, I have a ManyToMany relationship between two classes, for instance class Customer and class Item. A customer can buy several items and an item can be bought by different customers. I need to store extra information in this relationship, for example the day when the item was bought. I wonder how is this usually modelled in JPA, cause I'm not sure how to express this in code. Do I have to create a new class to model all the attributes of the relationship and make a manyToMany relationship between the other classes or is a better way to do this? Thanks

  Read the article

• How to make mysql accept connections externally

  - by Tam

  I have a VPS and I want to make mysql DB accept connection externally (from my PC for instance). I have Debian Linux installed on the server. I checked some tutorials online and they said to comment out: bind-address = 127.0.0.1 But this didn't seem to help! is there anything specific for VPSs? or Am I missing something else? The command that runs mysql is: /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --port=3306 --socket=/var/run/mysqld/mysqld.sock

  Read the article

• Is it possible to have an out-of-process COM server where a separate O/S process is used for each ob

  - by Tom Williams

  I have a legacy C++ "solution engine" that I have already wrapped as an in-process COM object for use by client applications that only require a single "solution engine". However I now have a client application that requires multiple "solution engines". Unfortunately the underlying legacy code has enough global data, singletons and threading horrors that given available resources it isn't possible to have multiple instances of it in-process simultaneously. What I am hoping is that some kind soul can tell me of some COM magic where with the flip of a couple of registry settings it is possible to have a separate out-of-process COM server (separate operating system process) for each instance of the COM object requested. Am I in luck?

  Read the article

• Handling Custom Protocols

  - by nomad311

  I'm looking to respond to an event from a web browser, hopefully any web browser. I'm working solely on windows and I came to the conclusion a custom protocol (I.E. myprot://collection/of/strings) is the best approach here (any objections?). But, handling an instance of this protocol seems to be a little less straight-forward. All I need is that collection of strings auto-magically passed to my already running application! (the app will only respond to these links while in a specific waiting state) So answer me this, if you can, Whats the 'popular' method of handling them or better yet Whats the 'best' (subjective - I know) way to do it? Although your answers don't need to be specific to my language, I am using Delphi for development. Thanks!

  Read the article

• Painting to Form then to Printer

  - by jp2code

  I often find myself needing to create custom reports that do NOT work with Crystal Reports or Report Viewer. Often, I hack a DataTable together and dumping that into a DataGridView control. It is never pretty, and printing is difficult. What I need is a class that I can call using the OnPaint event, but I've never sat down and written all of the Pen and Brush commands until now. Painting to the screen and painting to a printer both use the Graphics object, so I want to build a class that I'd pass in the Graphics object, my window bounds (a Rectangle), and some data (in the form of an instance of my class) that I'd use to paint a form or a sheet of paper. That sounds like a great concept! Surely, someone has done something like this before. Does anyone know of a book, a website tutorial, or video that goes into this? If someone wants to write all that out for me here, more power to you - but I'd think that would be too much work.

  Read the article

• Is it possible to modify ASP.NET to no longer require runat="server"?

  - by sean2078

  I know why runat="server" is currently required (ASP.NET why runat="server"), but the consensus is that it should not be required if you incorporate a simple default into the design (I agree of course). Would it be possible to modify, extend, decompile and recreate, intercept or otherwise change the behavior of how ASP.NET parses ASPX and ASCX files so that runat="server" would no longer be required? For instance, I assume that a version of Mono could be branched to accomplish this goal. In case specific requirements are helpful, the following highlights one design: During parsing, when configured namespace tags are encountered (such as "asp"), default the element's runat property to "server" During parsing, when configured namespace tags are encountered (such as "asp"), if the element's runat property value is available, then that value should be used in place of the default New page-level setting introduced (can be set in the page directive or web.config) that specifies the default runat value for a specific namespace tag

  Read the article

• Getting "Illegal Seek" error after calling accept()

  - by Bilthon

  Well.. it's pretty much that, I seem to be getting a "Illegal Seek" error when checking my errno variable. The problem is that I have no idea of what that can mean. I know sockets are treated like files in unix, but I can't see how can this be related to sockets. What I'm doing exactly is: int sck = ::accept(m_socket, (struct sockaddr*)&client_address, (socklen_t*)&address_len); Then I get sck = -1 and errno = ESPIPE And the weird thing is that it happens randomly. I mean, sometimes the code works fine, and sometimes it just thows an exception. I'm working with threads so that's understandable. But I just would like to know what kind of behaviour makes the accept() call to set errno as ESPIPE so I could check the paramethers for instance. Thanks Nelson R. Pérez

  Read the article

• How to initialize an Object?

  - by John

  I have a class like this, public class person { name Name {set; get;} string Address {set; get;} } public class name { string First {set; get;} string Last {set; get;} } Now when I create the object an try to set the first or last name I get an error. "Object reference not set to an instance of an object." person Person = new person(); Person.Name.First = "John"; Person.Name.Last ="Smith"; What am I doing wrong?

  Read the article

• dynamic behavior of factory class

  - by manu1001

  I have a factory class that serves out a bunch of properties. Now, the properties might come either from a database or from a properties file. This is what I've come up with. public class Factory { private static final INSTANCE = new Factory(source); private Factory(DbSource source) { // read from db, save properties } private Factory(FileSource source) { // read from file, save properties } // getInstance() and getProperties() here } What's a clean way of switching between these behaviors based on the environment. I want to avoid having to recompile the class each time.

  Read the article

• Ruby: change each value in a hash with something like #collect for arrays?

  - by Adam Nonymous

  Hi! I'd like to replace each value in a hash with value.some_method. For example in a simple hash {"a" = "b", "c" = "d"} every value should be .upcase-d so it looks like {"a" = "B", "c" = "D"}. I tried #collect and #map but always just get arrays back. Is there an 'elegant' way to do this? Thanks in advance, Adam Nonymous UPDATE: Damn, I forgot: The hash is in an instance variable which should not be changed. I need a new hash with the changed values, but would prefer not to define that variable explicitly and then loop over the hash filling it. Something like new_hash = hash.magic {...} ;)

  Read the article

• webservice - unknown web method parameter name methodname

  - by ch3r1f

  I called a webservice for fetching items in fullcalendar. The method is never called and firebug gives this error: *"POST [http]://localhost:50536/FullCalendar/ServicioFullCalendar.asmx/GetEventosCalendario POST [http]://localhost:50536/FullCalendar/ServicioFullCalendar.asmx/GetEventosCalendario 500 Internal Server Error 1.01s" "unknown web method parameter name methodname"* Here is the asmx.vb code: <System.Web.Script.Services.ScriptService()> _ <System.Web.Services.WebService(Namespace:="http://localhost/uva/")> _ <System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _ <ToolboxItem(False)> _ Public Class ServicioFullCalendar Inherits System.Web.Services.WebService <ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _ <WebMethod(MessageName:="ObtieneEventos")> _ Public Shared Function GetEventosCalendario(ByVal startDate As String, ByVal endDate As String) As String Try Return CalendarioMensualDAO.Instance.getEventos(startDate, endDate) Catch ex As Exception Throw New Exception("FullCalendar:GetEventos: " & ex.Message) Finally End Try End Function The webservice is "loaded" from the fullcalendar as follows: events: "ServicioFullCalendar.asmx/GetEventosCalendario",

  Read the article

• Load Balancing and Failover for Read-Only PostgreSQL Database

  - by Eric J.

  Scenario Multiple application servers host web services written in Java, running in SpringSource dm Server. To implement a new requirement, they will need to query a read-only PostgreSQL database. Issue To support redundancy, at least two PostgreSQL instances will be running. Access to PostgreSQL must be load balanced and must auto-fail over to currently running instances if an instance should go down. Auto-discovery of newly running instances is desirable but not required. Research I have reviewed the official PostgreSQL documentation on this issue. However, that focuses on the more general case of read/write access to the database. Top google results tend to lead to older newsgroup messages or dead projects such as Sequoia or DB Balancer, as well as one active project PG Pool II Question What are your real-world experiences with PG Pool II? What other simple and reliable alternatives are available?

  Read the article

• Is there a predefined enumeration for Month in the .NET library?

  - by Mark Rogers

  I'm looking to see if there is an official enumeration for months in the .net framework. It seems possible to me that there is one, because of how common the use of month is, and because there are other such enumerations in the .net framework. For instance, there is an enumeration for the days in the week, System.DayOfWeek, which includes monday, tuesday, etc.. I'm wondering if there is one for the months in the year, ie. January, February, etc? Does anyone know? Thanks for reading!

  Read the article

• Searching for patterns to create a TCP Connection Pool for high performance messaging

  - by JoeGeeky

  I'm creating a new Client / Server application in C# and expect to have a fairly high rate of connections. That made me think of database connection pools which help mitigate the expense of creating and disposing connections between the client and database. I would like to create a similar capability for my application and haven't been able to find any good examples of how to apply this pattern. Do I really need to spin up an instance of a TcpClient every time I want to send a message to the server and receive a receipt message? Each connection is expected to transport between 1-5KB with each receiving a 1KB response message. I realize this question is somewhat vague, but I am starting from scratch so I am open to suggestions. Even if that means my suppositions are all wrong.

  Read the article

• Recursive Function To Create Array

  - by mTuran

  Hi, i use kohana framework and i am trying to code recursive function to create category tree. My Categories Table id int(11) NO PRI NULL auto_increment name varchar(50) NO NULL parent_id int(11) NO NULL projects_count int(11) NO NULL My Example Which Is Not Work public static function category_list($parent_id = 0) { $result = Database::instance()->query(' SELECT name, projects_count FROM project_categories WHERE parent_id = ?', array($parent_id) ); $project_categories = array(); foreach($result as $row) { $project_categories[] = $row; Project_Categories_Model::factory()->category_list($parent_id + 1); } return $project_categories; }

  Read the article

< Previous Page | 327 328 329 330 331 332 333 334 335 336 337 338  | Next Page >