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• error: strstream.h: No such file or directory

  - by subodh1989

  I am trying to run an old C++ code in Linux (Redhat). I am using gcc version 4.1.2. I got the following error: error: strstream.h: No such file or directory /trnuser1/rmtrain/DevelopmentEnv/Generic/CoreObjects/GCVTransformationServices.cpp:41: error: âostrstreamâ was not declared in this scope /trnuser1/rmtrain/DevelopmentEnv/Generic/CoreObjects/GCVTransformationServices.cpp:41: error: expected `;' before âstrDestXMLâ /trnuser1/rmtrain/DevelopmentEnv/Generic/CoreObjects/GCVTransformationServices.cpp:62: error: âstrDestXMLâ was not declared in this scope This code was running fine under Solaris with gcc version 2.95. The line pointed to by the error contains the following statement: ostrstream strDestXML; How do I solve this?

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• Generically creating objects in C#

  - by DrLazer

  What I am trying to do is load in objects from an XML save file. The problem is those objects are configurable by the user at runtime, meaning i had to use reflection to get the names and attributes of those objects stored in an XML file. I am in the middle of a recursive loop through the XML and up to the part where I need to create an object then thought ..... ah - no idea how to do that :( I have an array stuffed with empty objects (m_MenuDataTypes), one of each possible type. My recursive loading function looks like this private void LoadMenuData(XmlNode menuDataNode) { foreach (object menuDataObject in m_MenuDataTypes) { Type menuDataObjectType = menuDataObject.GetType(); if (menuDataObjectType.Name == menuDataNode.Name) { //create object } } } I need to put some code where my comment is but I can't have a big switch statement or anything. The objects in my array can change depending on how the user has configured the app.

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• sql data source re binding question

  - by Keith

  In my gridview after an insert operation has been done I am filtering the sqldatasource by ID. I am getting an error that the item drop down box selected value is not in the list. To test my theory I created a new sql data source with only the select statement and after the insert operation I am binding it to my grid view and filtering by Id and I get my result. The question Having a second data source is not the solution so is it possible that there is some way to use sqldatasource1? what I tried is sqldatasource.databind() and gridview.databind() on the inserted and inserting metheds in many test cases but still that doesnt work. I dont have any filters applied on the original data source?

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• Using the "IN" clause with a comma delimited string from the output of a replace() function in Oracle SQL

  - by Thomas

  Hi All, I have an comma delimited string which I want to use in an "IN" clause of the statement. eg: 100,101,102 Since In and "IN" clause I have to quote the individial strings, I use a replace function: eg: select ''''||replace('100,101,102',',',''', ''')||'''' from dual; The above query works, however, when I try to use the output of the above as an input to the "IN" clause, it returns no data. I am restricted by only SQL statements, so I cannot use PL/SQL code. Kindly help. eg: select * from employee where employee_number in ( select ''''||replace('100,101,102',',',''', ''')||'''' from dual); The above does not work. Please let me know what I am missing.

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• Rails Application expecting me to restart my webrick server for any change in my controller.

  - by Vamsi

  I am working on an existing Rails 2.3.x application, So I was working on it and it was a messy code with great difficulty I was able to run the application. But now for every small change in one of my controller it is expecting me to restart my serer otherwise the changes are not reflecting back, Let's take an example scenario here, Let's just say in one of the before_filter method I just added a puts statement on top of the method and it was not printing in the log, after I restart the server it is printing, Can some one please let me know if I am missing something here.

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• Will I have legal issues if I attach this 'free' font using @font-face?

  - by janoChen

  *(I'm not sure if StackOverflow is the best place to ask this. But previously, I asked a similar question and it was well received).* I just found this awesome free font (Aller). It is free but it has the following written in the license file: Use by more than 25 Users, or equivalent Website Visitors, is a breach of this Free Licence Agreement, and instead requires a commercial licence. This is what I understand: If it is used in a company with more than 25 employees then it requires commercial license? If the website gets more than 25 visits per month it requires commercial license? Not sure if I got it wrong, but it doesn't make too much sense to me (specially the second statement. I want to use it in my personal portfolio were I provide web design services. Do I need a commercial license?

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• In SQL find the combination of rows whose sum add up to a specific amount (or amt in other table)

  - by SamH

  Table_1 D_ID Integer Deposit_amt integer Table_2 Total_ID Total_amt integer Is it possible to write a select statement to find all the rows in Table_1 whose Deposit_amt sum to the Total_amt in Table_2. There are multiple rows in both tables. Say the first row in Table_2 has a Total_amt=100. I would want to know that in Table_1 the rows with D_ID 2, 6, 12 summed = 100, the rows D_ID 2, 3, 42 summed = 100, etc. Help appreciated. Let me know if I need to clarify. I am asking this question as someone as part of their job has a list of transactions and a list of totals, she needs to find the possible list of transactions that could have created the total. I agree this sounds dangerous as finding a combination of transactions that sums to a total does not guarantee that they created the total. I wasn't aware it is an np-complete problem.

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• MySQL Connection Error with JSP

  - by voidmain

  Hello, I am trying to connect to mysql database from jsp page. The connection code is as below InitialContext ic=new InitialContext(); DataSource ds=(DataSource)ic.lookup("jdbc:mysql://localhost:3306/"); Connection con=ds.getConnection(); Statement stmt = con.createStatement(); when i open the page i get the following error javax.servlet.ServletException: javax.naming.NamingException: Lookup failed for 'jdbc:mysql://localhost:3306/' in SerialContext [Root exception is javax.naming.NameNotFoundException: jdbc:mysql:] can some one please tell me what is wrong with this...

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• how to select specific number of child entities instead of all in entity framework 3.5?

  - by Sasha

  Hi all, i am wondering how can i select specific number of child objects instead of taking them all with include? lets say i have object 'Group' and i need to select last ten students that joined the group. When i use '.Include("Students"), EF includes all students. I was trying to use Take(10), but i am pretty new to EF and programming as well, so i couldn't figure it out. Any suggestions? UPDATED: ok, i have Group object already retrieved from db like this: Group group = db.Groups.FirstOrDefault(x=>x.GroupId == id) I know that i can add Include("Students") statement, but that would bring ALL students, and their number could be quite big whether i need only freshest 10 students. Can i do something like this: var groupWithStudents = group.Students.OrderByDescending(//...).Take(10);? The problem with this is that Take< no longer appears in intellisense. Is this clear enough? Thanks for responses

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• C++ Generic List Assignment

  - by S73417H

  I've clearly been stuck in Java land for too long... Is it possible to do the C++ equivalent of the following Java code: // Method List<Bar> getBars() { return new LinkedList<Bar>(); } // Assignment statement. List<Foo> stuff = getBars(); Where Foo is a sub-class of Bar. So in C++.... std::list<Bar> & getBars() { std::list<Bar> bars; return bars; } std::list<Foo> stuff = getBars(); Hope that makes sense....

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• UIButton setBackgroundImage consumes doesn't release memory?

  - by just_another_coder

  My UIButton has it's background image set like this: [myImageButton setBackgroundImage:[UIImage imageNamed:myImageName] forState:UIControlStateNormal]; myImageButton is a retained property of the class, and is setup with IB. No where else is it accessed in the app. myImageName is simply an NSString with a filename like @"myImage_number_1.png" I am loading large images, 1024 x 1024 in size. When the view is shown, it changes the image with the above statement, then available memory decreases. After I see the view about 7-9 different times, the app crashes with a memory warning. I thought the method would free up the loaded image. The view itself is only instantiated and allocated one time, so it's not in the retain/release cycle if the view controller. Is there something about this setBackgroundImage I don't know that causes it to not release memory?

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• Show Dialog Question

  - by Michael Quiles

  How can I get the Xwinnerform to stay on top an keep the main form from being clicked, I tried ShowDialog but I cant get it to work. static public bool CheckWinner(Button[] myControls) { //bolean statement to check for the winner bool gameOver = false; for (int i = 0; i < 8; i++) { int a = Winners[i, 0]; int b = Winners[i, 1]; int c = Winners[i, 2]; Button b1 = myControls[a], b2 = myControls[b], b3 = myControls[c]; if (b1.Text == "" || b2.Text == "" || b3.Text == "") continue; if (b1.Text == b2.Text && b2.Text == b3.Text) { xWinnerForm xWinnerForm = new xWinnerForm(); xWinnerForm.ShowDialog(b1.Text + " is the Winner"); } } return gameOver; } enter code here

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• A problem with .NET 2.0 project, using a 3.0 DLL which implements WCF services.

  - by avance70

  I made a client for accessing my WCF services in one project, and all classes that work with services inherit from this class: public abstract class ServiceClient<TServiceClient> : IDisposable where TServiceClient : ICommunicationObject This class is where I do stuff like disposing, logging when the client was called, etc. some common stuff which all service classes would normally do. Everything worked fine, until I got the task to implement this on an old system. I got into a problem when I used this project (DLL) in an other project which cannot reference System.ServiceModel (since it's an old .NET 2.0 software that I still maintain, and upgrading it to 3.0 is out of the question). Here, if I omit where TServiceClient : ICommunicationObject then the project can build, but the ServiceClient cannot use, for example, client.Close() or client.State So, is my only solution to drop the where statement, and rewrite the service classes?

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• how to dissect string values

  - by nhoyti

  how can i dissect or retrieve string values Here's the sample code that im working on now private void SplitStrings() { List<string> listvalues = new List<string>(); listvalues = (List<string>)Session["mylist"]; string[] strvalues = listvalues.ToArray(); for (int x = 0; x < strvalues.Length; x++) { } } now that i'am able to retrieve List values in my session, how can i separately get the values of each list using foreach or for statement?

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• Anyway to get a value similar to @@ROWCOUNT when TOP is used?

  - by cfeduke

  If I have a SQL statement such as: SELECT TOP 5 * FROM Person WHERE Name LIKE 'Sm%' ORDER BY ID DESC PRINT @@ROWCOUNT -- shows '5' Is there anyway to get a value like @@ROWCOUNT that is the actual count of all of the rows that match the query without re-issuing the query again sans the TOP 5? The actual problem is a much more complex and intensive query that performs beautifully since we can use TOP n or SET ROWCOUNT n but then we cannot get a total count which is required to display paging information in the UI correctly. Presently we have to re-issue the query with a @Count = COUNT(ID) instead of *.

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• Please help me understand this PHP script.Noob here

  - by NissGTR

  I'm learning PHP,MySQL and came across this function today function get_director($director_id) { global $db; $query = 'SELECT people_fullname FROM people WHERE people_id = ' . $director_id; $result = mysql_query($query, $db) or die(mysql_error($db)); $row = mysql_fetch_assoc($result); extract($row); return $people_fullname; } I understand what functions are and I've created a few while learning PHP.But this one is a bit more complicated.I can't understand the WHERE people_id = ' . $director_id I'm new to MySQL.I guess the single quote ends the MySQL statement?And then it is concatenated with the argument? Please help me out.

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• The Wheel Invention - Beneficial For Learning?

  - by Sarfraz

  Hello, Chris Coyier of css-tricks.com has written a good article titled Regarding Wheel Invention. In a paragraph he says: On the “reinventing” side, you benefit from complete control and learning from the process. And on the very next line he says: On the other side, you benefit from speed, reliability, and familiarity. Also often at odds are time spent and cost. He is right in both statements I think. I really like his first statement. I do actually sometimes re-invent the wheel to learn more and gain complete control over what I am inventing. I wonder why people are so much against that or rather biased. Isn't there the benefit of learning and getting complete control or probably some other benefits too. I would love to see what you have to say about this.

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• How does lock(syncRoot) make sense on a static method?

  - by Rising Star

  The following code is excerpted from the (Windows Identity Foundation SDK) template that MS uses to create a new Security Token Service Web Site. public static CustomSecurityTokenServiceConfiguration Current { get { HttpApplicationState httpAppState = HttpContext.Current.Application; CustomSecurityTokenServiceConfiguration customConfiguration = httpAppState.Get( CustomSecurityTokenServiceConfigurationKey ) as CustomSecurityTokenServiceConfiguration; if ( customConfiguration == null ) { lock ( syncRoot ) { customConfiguration = httpAppState.Get( CustomSecurityTokenServiceConfigurationKey ) as CustomSecurityTokenServiceConfiguration; if ( customConfiguration == null ) { customConfiguration = new CustomSecurityTokenServiceConfiguration(); httpAppState.Add( CustomSecurityTokenServiceConfigurationKey, customConfiguration ); } } } return customConfiguration; } } I'm relatively new to multi-threaded programming. I assume that the reason for the lock statement is to make this code thread-safe in the event that two web requests arrive at the web site at the same time. However, I would have thought that using lock (syncRoot) would not make sense because syncRoot refers to the current instance that this method is operating on... but this is a static method? How does this make sense?

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• Single C++/CLI method to wrap many type specific C functions

  - by T33C

  I am wrapping a C library using C++/CLI so that the C library can be used easily from C# in a C#'ish way. Some of the functions in this library are for putting a value into a container. There are no generics in C so there exists a function per type CLIB_SetBool(BOOL value), CLIB_SetInt(int value), CLIB_SetString(char* string) and so on. To make it easier to use from C#, I have created a single Set function which takes a System::Object. I have two related questions: With my method how would you use a switch statement on the type of System::Object to call the correct CLIB_Setxxxx function. [typeid is only for unmanaged code and I can't seem to use GetType.] Is there a better way to wrap these functions like using a Generic? [I started using template specialisation but then realised that C# doesn't see templates.] Thanks.

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• Joining two select queries and ordering results

  - by user1

  Basically I'm just unsure as to why this query is failing to execute: (SELECT replies.reply_post, replies.reply_content, replies.reply_date AS d, members.username FROM (replies) AS a INNER JOIN members ON replies.reply_by = members.id) UNION (SELECT posts.post_id, posts.post_title, posts.post_date AS d, members.username FROM (posts) as b WHERE posts.post_set = 0 INNER JOIN members ON posts.post_by = members.id) ORDER BY d DESC LIMIT 5 I'm getting this error: #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'a INNER JOIN members ON replies.re' at line 2 All I'm trying to do is select the 5 most recent rows (dates) from these two tables. I've tried Join, union etc and I've seen numerous queries where people have put another query after the FROM statement and that just makes no logical sense to me as to how that works? Am I safe to say that you can join the same table from two different but joined queries? Or am I taking completely the wrong approach, because frankly I can't seem see how this query is failing despite reading the error message. (The two queries on there own work fine)

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• Javascript - document.links.className ?

  - by Slevin

  I have a Javascript question that I am curious about. When using: var test = document.links(arrayNum).name; Is it possible to dig deeper into specifying links? For instance, if there is just a group of links from within a div with an id that you would like to target as opposed to all the links on the page could you write something like: var test = document.getElementById('divId').links(arrayNum).name; Or could I add a class to the statement to target only the links associated with it? var test = document.links.className(arrayNum).name; Is anything like this feasible?

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• Storing database records into array

  - by zerey

  I would want to create an array that will hold records retrieved from a database using a query of SELECT statement. The records to be retrieved have multiple fields such as lastname, firstname, mi and 20 more fields. What would be the best approach on coding this function? alright i have followed what prisoner have given below.. the next question is how do i search through this kind of array using queries? for example i want to search for a username..

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• How to escape $ in php using preg_replace ?

  - by sakura

  Hi, I am using preg_replace to escape special characters... $tmpStr=preg_replace("/\?/", "\?", $tmpStr); $tmpStr=preg_replace("/\#/", "\#", $tmpStr); $tmpStr=preg_replace("/\^/", "\^", $tmpStr); $tmpStr=preg_replace("/\&/", "\&", $tmpStr); $tmpStr=preg_replace("/\*/", "\*", $tmpStr); $tmpStr=preg_replace("/\(/", "\(", $tmpStr); $tmpStr=preg_replace("/\)/", "\)", $tmpStr); $tmpStr=preg_replace("/\//", "\/", $tmpStr); but i am not able to escape $ using the same function $tmpStr=preg_replace("/\$/", "\$", $tmpStr); and also when i use the above statement all the spaces get replaced by $ and $ is not getting escaped....someone please help me with this....

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• The glutKeyboardFunc does not react to key presses immediately

  - by Nibirue

  I have a function glutKeyboardFunc(keyboard), where keyboard has: void keyboard(unsigned char key, int x, int y){ float alpha = 1.0; switch(key){ case 'c': glClearColor(1,0,0,alpha); printf("success"); break; } } This is a summary of the function; it works properly, but only once some other action has occurred. For instance, the printf statement reports success immediately on keystroke 'c', but the background color does not become active until I click somewhere else on the canvas. I want all keystrokes to have an immediate effect.

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• Selecting data effectively sql

  - by learner135

  Hi, I have a very large table with over 1000 records and 200 columns. When I try to retreive records matching some criteria in the WHERE clause using SELECT statement it takes a lot of time. But most of the time I just want to select a single record that matches the criteria in the WHERE clause rather than all the records. I guess there should be a way to select just a single record and exit which would minimize the retrieval time. I tried ROWNUM=1 in the WHERE clause but it didn't really work cause I guess the engine still checks all the records even after finding the first record matching the WHERE criteria. Is there a way to optimize in case if I want to select just a few records? Thanks in advance. Edit: I am using oracle 10g.

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