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  • When accessing ResultSets in JDBC, is there an elegant way to distinguish between nulls and actual z

    - by Uri
    When using JDBC and accessing primitive types via a result set, is there a more elegant way to deal with the null/0 than the following: int myInt = rs.getInt(columnNumber) if(rs.wasNull())? { // Treat as null } else { // Treat as 0 } I personally cringe whenever I see this sort of code. I fail to see why ResultSet was not defined to return the boxed integer types (except, perhaps, performance) or at least provide both. Bonus points if anyone can convince me that the current API design is great :) My solution was to write a wrapper that returns an Integer (I care more about elegance of client code than performance), but I'm wondering if I'm missing a better way to do this.

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  • How do i change the address of a New struct in a loop?!

    - by Yasin
    Hi guys, i'm writing a simple code which is about polynomials using link lists in C#. the problem i have is that whenever it creates a new struct (node) in the for loop it gives it the same address as the previous node was given. so how do i fix it ? here is my struct : struct poly { public int coef; public int pow; public poly* link;} ; and here is the where the problem occurs: for (; i < this.textBox1.Text.Length; i++) { q = new poly(); ...... p->link = &q; } &q remains unchanged !

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  • Can Eclipse not hard-code ECLIPSE_HOME when exporting build.xml?

    - by stevex
    I have an Eclipse project that I'm attempting to set up to build both with Eclipse and externally with Ant. It seems like a good way to do this is to have Eclipse generate a build.xml file that I can then use with ant. I'd like to set it up so the build.xml can be regenerated from Eclipse whenever the need arises, which means no hand-editing the build.xml file. But Eclipse writes one entry in there that has a hard-coded path to a directory on my computer, which makes it unsuitable for checking in to a source repository. Specifically it's this entry that's the trouble: <property name="ECLIPSE_HOME" value="D:/Eclipse/Eclipse Galileo (3.5) SR1"/> Is there some way to have Eclipse not output this line, or to make it a relative reference or something that makes sense to check in?

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  • Do you know of a C dictionary that supports COW transactions?

    - by Tim Post
    I'm looking for a key - value dictionary library written in C that supports a theoretically unlimited number of cheap transactions. I'd like to have one dictionary in memory, with hundreds of threads starting transactions, possibly modifying the dictionary, ending (completing) the transaction or potentially aborting the transaction. Only 50% of the time will these threads actually modify the dictionary. Most dictionary transaction implementations that I've seen copy always, instead of copying on write, whenever a transaction is started. Given the expected size ( 1GB) of the dictionary, I'm hoping to find something that COWs only when something is actually changed during a transaction. I'm also hoping for something that is packaged by most major GNU/Linux distributions. Any suggestions or links are very much appreciated.

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  • User authorization in DB2

    - by Daziplqa
    Hi Folks, I am using win Vista, and I am trying to backup some Database under DB2. I am logged in using the Administrator user, and whenever I try to issue the backup command in the "command line processor", I get the following message: SQL1092N "ADMINISTRATOR" does not have the authority to perform the requested command. SQLSTATE=00000 BTW, I have created a username/password pair (db2admin) while installing the DB2 server. So, Will this problem will be get solved if I use the db2admin user? And how to connect to the server (local server BTW) using the db2admin user ?

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  • How to use JQuery to remove dynamic content?

    - by ed.talmadge
    I have an html page that is generated by a CMS. I cannot modify the page, but can add JavaScript. Each time the page loads, a JavaScript function (that I cannot modify) dynamically inserts a paragraph onto the page. How can I use JQuery to .remove() that paragraph whenever it is loaded? For example, when the page first loads, it look like this (blank): <div></div> Then, a few seconds later, a JavaScript function (that I have no control over) adds a paragraph to the page. The page then looks like this: <div><p id="foo">bar</p></div> How can I use JQuery to remove the paragraph with id=foo each time it is dynamically loaded onto the page?

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  • What's the equivalent in C# of this VB code on an Outlook form?

    - by wes
    Basically, how do I link an Outlook form and a C# back end? In VB you can write on the form Sub ButtonName_Click() Dim Recipients With Item.GetInspector.ModifiedFormPages("Message") Set Recipients = .Controls("To") End With End Sub which will fire whenever the button named "ButtonName" on the form is clicked and will set the variable Recipients to a string of whatever is in the To text box. Now I have a custom form, and I have a VS C# Outlook Add-in, and they're two separate things. I've got an event handler that can catch MailItem objects, but I don't know how to handle custom form button clicks or even how to access elements on the form. EDIT - Just to clarify, the custom form was created in Outlook and then its .ofs was imported into VS. Both Outlook and VS are 2010.

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  • How to implement event notification mechanism in AIR

    - by nxhoaf
    Do you know how to implement event notification mechanism in AIR ? For simplicity, consider an example: I want to build two applications: "television" and "remote". Among them, television is implemented using AIR. For the "television" I want to use my remote to send message to the television. How must I do to implement "television" in such way that, it runs in waiting mode and whenever it receives a message from "remote", it will process the message and make a suitable action (i.e. change channel, increase volume...). Thank you in advance.

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  • Password verification; Is this way of doing it safe?

    - by Camran
    I have a classifieds website, where everybody may put ads of their products. For each classified, the user has to enter a password (so that they can delete the classified whenever they wish). So basically, when somebody wants to delete a classified, they click on the classified, click on the delete button, and enter the pass. I use MySql as a database. I use this code basically: if ($pass==$row['poster_password']) where row[poster_password] is fetched from MySql... What do you think? Thanks

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  • Notify a content resolver when normal sql insert or update

    - by user1400538
    I have created a small content provider (which I only use to query a db table and fetch some value). I have confirmed that the provider works fine. The table values get updated on a regular basis through normal sql insertions(and not through anycontent provider) Whenever an insert/update or delete occurs through a normal sqlite operation as mentioned above, I need to notify the content resolvers which was written to communicate with the content provider just for quering database and fetch some values. Is this, possible? If yes what need to be done? Any help is appreciated.

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  • how to create a auto-incremented attribute in xcode managed object model

    - by Mausimo
    Hey, what i want to do is to make a int that will be the ID of the entity and auto increment itself whenever a new entity is added (just like a SQL identity property). Is this possible? i tried using indexed (checked on attribute) however there is no description to what indexed even does. EDIT: I am adding annotations to a map, when you click the pin the annotationview with a chevron shows up. Now when you click this button i would like to load an associated picture. However the only way i know how to link the picture to this button is to give the picture a unique id, and then set the button.tag to this id and then load based on the button.tag.

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  • Canon MF3200 Printer Problems [closed]

    - by Derick K.
    I bought a Canon MF3200 and used it on an old Windows laptop. The laptop broke, and now I'm trying to setup the printer on a laptop with Windows 7. I downloaded the new driver, and Windows was able to install it and mark it "Ready to Go." But whenever I try to print, an error comes up and it doesn't print. I tried to troubleshoot, to no avail. What else can I do? Any ideas on what the error might be?

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  • How do I dump arrays in a nice orderly fashion?

    - by George
    Whenever I use print_r or var_dump they come out all sloppy and in one line instead of formatted like I see so many people and the actual php.net site being able to achieve. What do I do to get them like this - Array ( [a] => apple [b] => banana [c] => Array ( [0] => x [1] => y [2] => z ) ) Instead of this Array([a] => apple [b] => banana [c] => Array ( [0] => x [1] => y [2] => z )) (Pretty sure it comes out even messier than that I was just deleting whitespace by hand.)

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  • qt custom widgets propertis are not getting updated properly in Qt designer

    - by user553911
    I have created a custom widget. The widget gets loaded fine,the properties appear in QT Designer, Only problem is every time I change the property of Alpha key,the numeric also gets set, Though the accessor functions are different,and the enums are differnet and values are different. Also whenever i check the Form-view code,the values would have got modified. Am i Missing something or this is a designer issue,Any workarounds would be appreciated class key { Q_PROPERTY(AlphKeycode_t AlphKeycode READ AlphKeycode WRITE setAlphKeycode); Q_PROPERTY(bool AlphKey READ isAlph WRITE setAlph); Q_ENUMS(AlphKeycode_t); Q_PROPERTY(NumKeycode_t NumKeycode READ NumeKeycode WRITE setNumKeycode); Q_PROPERTY(bool NumKey READ isNum WRITE setNum); Q_ENUMS(NumKeycode_t); } struct AlphData { QString label; bool isAlphabetic; }; struct NumData { QString label; bool isNumeric; }; AlphData AlphKeyData[] = { {"q",true }, } NumData NumKeyData[] = { {"1", false}, }

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  • Creating DB views in Ruby on Rails

    - by Zigu
    Hey guys, I'm building a "reports" functionality to a project. 3 roles here: 1) Volunteers (they report what hours they volunteered) 2) Supervisors (they look at the reported stuff, note: one supervisor can view all projects) 3) Projects (Represents a work project that some collection of volunteers work on) To explain what it does: A report will be specified by the supervisor to generate based on a query of what he needs. These could be plausible reports: 1) The total number of volunteers, and the total amount of volunteer hours on this project 2) All the volunteer's names and emails associated with a project 3) The number of active projects vs. the total number of projects I was thinking maybe that creating a view in rails and storing the name of that view so Rails will just check the view whenever a supervisor wants to pull up the "report". Is a view really the answer or is it better to just save a query? Can Rails do this or is there an even better or more simple way of achieving this functionality? Cheers, -Jeremiah Tantongco

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  • PreparedStatement throws MySQLSyntaxErrorException

    - by sqlBugs
    I have the following Java code: String query = "Select 1 from myTable where name = ? and age = ?"; PreparedStatement stmt = conn.prepareStatement(query); stmt.setString(1, name); stmt.setInt(2, age); ResultSet rs = stmt.executeQuery(); Whenever I run the above code, it throws an exception on line 2 (where the PreparedStatement is declared): Error 0221202: SQLException = com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: 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 '? AND age = ?' at line 1 Does anyone have any suggestions about what I am doing wrong? Thanks!

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  • how to call a function to refresh GUI

    - by SWKK
    Hi Guys, I am refactoring some code to decouple GUI from some state. #include <StateObject> Class GUI{ ... StateObject A; void doSomething() { A->hullaballoo();} **void ReFreshMyGui() { //take state A and redraw }** }; State object is being shared by multiple classes to update the state but this Gui Object specializes in displaying the state. So I would like to call the Refresh function via StateObject whenever its modified. I am not sure how or if signals will provide the solution. Any hints?

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  • How to show a page after a specific time period?

    - by Mahfuz
    I want to build an online quiz test site. Suppose, exam will start at 10:00 am and a student login to give exam at 9:45 am. Whenever the student clicks 'Take Exam' button, he/she cannot not get access to the question paper because the exam time is 10:00 am and there are still 15 minutes before the exam start. Now I want to put some Javascript or PHP code that will prohibit the students to give exam earlier and if a students come early, it will show a stopwatch which display the remaining time before exam time and when the current time is equal to exam time then he/she will be directly redirected to the question paper page.

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  • Preprocessor directive #ifndef for C/C++ code

    - by Leif Andersen
    In eclipse, whenever I create a new C++ class, or C header file, I get the following type of structure. Say I create header file example.h, I get this: /*Comments*/ #ifndef EXAMPLE_H_ #define EXAMPLE_H_ /* Place to put all of my definitions etc. */ #endif I think ifndef is saying that if EXAMPLE_H_ isn't defined, define it, which may be useful depending on what tool you are using to compile and link your project. However, I have two questions: Is this fairly common? I don't see it too often. And is it a good idea to use that rubric, or should you just jump right into defining your code. What is EXAMPLE_H_ exactly? Why not example.h, or just example? Is there anything special about that, or could is just be an artifact of how eclipse prefers to autobuild projects? Thank you for your help.

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  • How can I convert a specific .cs file into either a .bat or a .exe file?

    - by user2974969
    I am trying to convert around 1,900 .txp files (a proprietary Sony image format) to .png. However, the .exe program I am using to convert these files only allows me to select one file at a time. I am running Windows 7. There's a TXP.CS file in the 'src' folder of the program, so I figured that if I was able to turn that into an executable file, I'd be able to use it to mass convert these files to PNG. However, whenever I try to convert the file using csc.exe, I get the CS0246 error (the type or namespace name 'Tools' could not be found. Are you missing a using directive or an assembly reference?). I can't use Microsoft Visual Studio right now, so I'm hoping someone can walk me through this, or maybe convert the file to either a .bat or an .exe for me. Thank you. TXP.CS

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  • Facebook access token: server-side vs client-side flows

    - by alexey
    Facebook docs: Facebook Platform supports two different OAuth 2.0 flows for user login: server-side (known as the authentication code flow in the specification) and client-side (known as the implicit flow). The server-side flow is used whenever you need to call the Graph API from your web server. The client-side flow is used when you need to make calls to the Graph API from a client, such as JavaScript running in a Web browser or from a native mobile or desktop app. What is the difference between access tokens taken by these flows? It seems like they length differ. Can we use server-side flow token on a client? And otherwise, can we use client-side flow token on a server?

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  • Windows fonts not immediately useable in application after installing?

    - by Jappie
    Whenever I install a new font on a Windows 2003 server, I can't use it immediately in my asp.net web application. The application gets the font through the CreateFontIndirect gdi32.dll win api. It seems like fonts get cached somewhere, because I will just get the default font returned. The font cache gets updated after a reboot, and then I get the correct font, but obviously I wouldn't like to do a reboot on a production server just for getting a new font to work. Is there a way to flush the font cache?

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  • How to include a Custom list in one Sharepoint site in to another as a web part?

    - by Rakhitha
    I have two share point web sites. One is a child web site of the other. For example if my first site is myweb1, other one is myweb1/myweb2. I have a custom list created in myweb1. I want to include that as a web part in number of web pages in both myweb1 and myweb1/myweb2 sites. Including the web part in the same site which contains the custom list is not a problem. But how do I include it in the other site. The web part does not show up in the list. I dont want to copy the content of custom list. I want pages in both sites that have included this list as a web part to be updated whenever the list content is changed. Any ideas?

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  • Do you use Phing?

    - by Sam McAfee
    Does anyone use Phing to deploy PHP applications, and if so how do you use it? We currently have a hand-written "setup" script that we run whenever we deploy a new instance of our project. We just checkout from SVN and run it. It sets some basic configuration variables, installs or reloads the database, and generates a v-host for the site instance. I have often thought that maybe we should be using Phing. I haven't used ant much, so I don't have a real sense of what Phing is supposed to do other than script the copying of files from one place to another much as our setup script does. What are some more advanced uses that you can give examples of to help me understand why we would or would not want to integrate Phing into our process.

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  • Access 2007 Locking Issue - Attachments being overwritten...

    - by user456356
    We're currently running into an issue with an Access 2007 database for a client. They've got Excel 2007 documents attached to records within the database. Whenever changes to the document are made, they are overwriting each other, and we're not sure exactly why. This is happening with different records, and all of the attached documents are named differently. We've tried adjusting the different locking schemes, but this doesn't seem to resolve the issue. Any ideas? Are we missing something?

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