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  • Local variables in java

    - by Mandar
    Hello , I went through local variables and class variables concept. But I had stuck at a doubt " Why is it so that we cannot declare local variables as static " ? For e.g Suppose we have a play( ) function : void play( ) { static int i=5; System.out.println(i); } It gives me error in eclipse : Illegal modifier for parameter i; I had this doubt because of the following concepts I have read : Variables inside method : scope is local i.e within that method. When variable is declared as static , it is present for the entire class i.e not to particular object. Please could anyone help me out to clarify the concept. Thanks.

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  • Objective C loop logic

    - by Graham
    Hi guys, I'm really new to programming in Obj-C, my background is in labview which is a graphical programming language, I've worked with Visual Basic some and HTML/CSS a fair amount as well. I'm trying to figure out the logic to create an array of data for the pattern below. I need the pattern later to extract data from another 2 arrays in a specific order. I can do it by referencing a = 1, b = 2, c = 3 etc and then creating the array with a, b, c but I want to use a loop so that I don't have 8 references above the array. These references will be used to generate another generation of data so unless I can get help figuring out the logic I'll actually end up with 72 references above the array. // This is the first one which gives the pattern 0 0 0 0 (etc) // 1 1 1 1 // 2 2 2 2 NSMutableArray * expSecondRef_one = [NSMutableArray array]; int a1 = 0; while (a1 < 9) { int a2 = 0; while (a2 < 8) { NSNumber * a3 = [NSNumber numberWithInt:a1]; [expSecondRef_one addObject:a3]; a2++; } a1++; } // This is the second one which I'm stumbling over, I am looking for the pattern 1 2 3 4 5 6 7 8 // 0 2 3 4 5 6 7 8 // 0 1 3 4 5 6 7 8 // 0 1 2 4 5 6 7 8 // etc to -> // 0 1 2 3 4 5 6 7 If you run it in a line every 9th number is -1 but I don't know how to do that over a pattern of 8. Thanks in advance! Graham

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  • Jaxb Simplify Plugin

    - by wrm
    i try to use the simplify plugin to simplify the generated code. I have a defined type: <xsd:complexType name="typeWithReferencesProperty"> <xsd:choice maxOccurs="unbounded"> <xsd:annotation> <xsd:appinfo> <simplify:as-element-property/> </xsd:appinfo> </xsd:annotation> <xsd:element name="a" type="AttributeValueIntegerType"/> <xsd:element name="b" type="AttributeValueIntegerType"/> </xsd:choice> </xsd:complexType> but it does not work, as it results in the following error: compiler was unable to honor this as-element-property customization. It is attached to a wrong place, or its inconsistent with other bindings. i used exactly the configuration, i also have other jaxb plugins which work, so i am not quite sure, if the plugin is broken or something? has anybody managed to get this running?

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  • Widget -what to do and what not

    - by mkoso
    I would like to make a html/js widget that people can add to their blogs, sites etc. I have never made widgets before so I would like to hear what should be done and what not. For example, how do I make the styling? Inline, own css file or what is the best practise? I believe i cant use head and body stuff in it. What about h1, h2 etc? Do they screw the website that has the widget or can i use them? If you have any good tips I would like to hear those. Thanks.

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  • Why do I get a Warning and a Fatal error when I use ../ ?

    - by aliov
    When I use ../mysqlConnect.php I get the following messages. Warning: require_once(../mysqlConnect.php) [function.require-once]: failed to open stream: No such file or directory in /home/content/etc... Fatal error: require_once() [function.require]: Failed opening required '../mysqlConnect.php' (include_path='.:/usr/local/php5/lib/php') in /home/content/etc... When I use the directory name - mydir/mysqlConnect.php - everything works fine.

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  • Creating dynamic text for a literal control

    - by strakastroukas
    On the ListView1_ItemDataBound of a list view event, i create the literal.text like so... <span style="position:relative"> <span id="term1" class="popup">This is the answer!</span> <a href="javascript:void(0);"onMouseover="ShowPop('term1')" onMouseout="HidePop('term1')">Show me the answer</a></span> The problem is that the text is not rendered as it should. On mousing over the literal control the url is http://localhost:1391/"javascript:void(0);"onMouseover="ShowPop('term1');" So what is going on here? What am i missing?

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  • include and using namespace in C++

    - by cambr
    for using cout, I need to specify both: #include<iostream> and using namespace std; Where is cout defined? in iostream, correct? So, it is that iostream itself is there in namespace std? What is the meaning of both the statements with respect to using cout? I am confused why we need to include them both.

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  • Why is this c++ string concatenation missing a space?

    - by danutenshu
    I am working with c++ strings, and am a beginner at programming. I am expecting: 99 Red Balloons But I am receiving: 99 RedBalloons Why is that? #include <string> #include <iostream> using namespace std; int main() { string text = "9"; string term( "9 "); string info = "Toys"; string color; char hue[4] = {'R','e','d','\0'}; color = hue; info = "Balloons"; text += (term + color + info); cout << endl << text << endl; return 0; }

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  • Resources/Teaching ideas to teach computers to kids

    - by Shravan
    A small initiative from my work place plans to teach very basic computers to not so fortunate kids. I was looking for some very basic topics/resources. These kids are very young and have not seen/worked with a computer before. The fun factor should not be lost and hence I don't want it to be rigorous, just plain, what is computer, keyboard, mouse, browser, where to look for what (google.com) and so on. Has any-one done this sort of thing before, if yes, could you point me to some resources.

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  • How to initialize log4j properly?

    - by Janusz
    After adding log4j to my application I get the following output every time I execute my application: log4j:WARN No appenders could be found for logger (slideselector.facedata.FaceDataParser). log4j:WARN Please initialize the log4j system properly. It seems this means a configuration file is missing. Where should this config file be located and what is a good start content? I'm using plain java for developing a desktop application. So no webserver etc...

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  • How to use jaxb_commons plugins from maven

    - by user243155
    I'm trying to use a jaxb plugin to insert a interface into a choice element generating the classes from maven. The problem is that I can't seem to figure out how to do so from maven, the repository isn't clear from the documentation and the only example (bellow) doesn't work, it seems to ignore the plugin (maven reports no error about not finding it) or the plugin doesn't have all the adds-ons currently listed in the project documentation: <plugin> <groupId>org.jvnet.jaxb2.maven2</groupId> <artifactId>maven-jaxb2-plugin</artifactId> <version>0.6.1</version> <executions> <execution> <goals> <goal>generate</goal> </goals> </execution> </executions> <configuration> <generatePackage>br.com.wonder.nfe.xml</generatePackage> <args> <arg>-Xifins</arg> </args> <plugins> <plugin> <groupId>org.jvnet.jaxb2_commons</groupId> <artifactId>basic</artifactId> <version>0.4.1.5</version> </plugin> </plugins> </configuration> </plugin> I have these in the root pom: <pluginRepositories> <pluginRepository> <id>maven2-repository.dev.java.net</id> <url>http://download.java.net/maven/2</url> </pluginRepository> <pluginRepository> <id>maven-repository.dev.java.net</id> <name>Java.net Maven 1 Repository (legacy)</name> <url>http://download.java.net/maven/1</url> <layout>legacy</layout> </pluginRepository> </pluginRepositories> Running that gives: Error while setting CmdLine options '[-Xifins, -episode, /home/administrador/JavaApp/wnfe3/wnfe-ejb/target/generated-sources/xjc/META-INF/sun-jaxb.episode]'! Embedded error: unrecognized parameter -Xifins

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  • C++ Basic Class Layout

    - by Spencer
    Learning C++ and see the class laid out like this: class CRectangle { int x, y; public: void set_values (int,int); int area () {return (x*y);} }; void CRectangle::set_values (int a, int b) { x = a; y = b; } I know Java and methods(functions) in Java are written within the class. The class looks like a Java interface. I know I can write the class like this: class CRectangle { int x, y; public: void set_values (int a, int b) { x = a; y = b; }; int area () {return (x*y);} }; But is there a difference or standard?

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  • Get a list/tuple/dict of *all* the arguments passed to a function?

    - by Phillip Oldham
    Given the following function: def foo(a, b, c): pass How would one obtain a list/tuple/dict/etc of the arguments passed in? Specifically, I'm looking for Python's version of JavaScript's arguments keyword or PHP's func_get_args() method. What I'm not looking for is a solution using *args or **kwargs; I need to specify the argument names in the function definition (to ensure they're being passed in) but within the function I want to work with them in a list- or dict-style structure.

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  • Noob question: Draw a quad parallel to the view.

    - by Jack
    Hi all, ok what I want to do is to draw a quad in the scene that lays on a plane parallel to the view. So it should appear flat. More in particular, I think I didn't get very well how the mechanism of gluLookAt works in comparison with the functions glTranslate and glRotate: If I position the view "manually" using the functions glTranslate and glRotate whenever I draw an object its position is relative to the current view. And I understand that this is due to the transformation matrix in the stack. However when I use the gluLookAt that should automatically set the view, the coordinates of the object I want to draw must be "absolute" to show it properly. Thanks in advance.

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  • how to specify a pointer to an overloaded function?

    - by davka
    I want to pass an overloaded function to the std::for_each() algorithm. e.g.: void f(char c); void f(int i); std::string s("example"); std::for_each(s.begin(), s.end(), f); I'd expect the compiler to resolve f() by the iterator type. Apparently, it (gcc 4.1.2) doesn't do it. So, how can I specify which f() I want? thanks a lot

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  • Why use C typedefs rather than #defines?

    - by me_and
    What advantage (if any) is there to using typedef in place of #define in C code? As an example, is there any advantage to using typedef unsigned char UBYTE over #define UBYTE unsigned char when both can be used as void func() { UBYTE byte_value = 0; /* Do some stuff */ return byte_value; } Obviously the pre-processor will try to expand a #define wherever it sees one, which wouldn't happen with a typedef, but that doesn't seem to me to be any particular advantage or disadvantage; I can't think of a situation where either use wouldn't result in a build error if there was a problem.

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  • What are the basics (best practices, etc) of writing a good Flash application?

    - by donut
    I've been tasked with writing a Flash application for facilitating a Fantasy Football draft pick. Normally, my choice would be to write this application in JavaScript. Unfortunately, it will require the use of sockets and since we don't have enough experience with Web Socket JS to be sure it would work in this situation I need to learn Flash. Currently, I'm most proficient in JavaScript/HTML/CSS/PHP/MySQL and have never really used Flash in a meaningful way. As best as I can I want to start this project off "the right way". So, what are good to know best practices and/or references/resources that will teach my the right way of doing things in Flash?

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  • Silverlight Cream for November 21, 2011 -- #1171

    - by Dave Campbell
    In this Issue: Colin Eberhardt, Sumit Dutta, Morten Nielsen, Jesse Liberty, Jeff Blankenburg(-2-), Brian Noyes, and Tony Champion. Above the Fold: Silverlight: "PV Basics : Client-side Collections" Tony Champion WP7: "Pushpin Clustering with the Windows Phone 7 Bing Map control" Colin Eberhardt Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up From SilverlightCream.com: Pushpin Clustering with the Windows Phone 7 Bing Map control Colin Eberhardt is back discussing Pushpins for a BingMaps app on WP7 and provides a utility class that clusters pushpins, allowing you to render 1000s of pins on an app ... all the explanation and all the code Part 22 - Windows Phone 7 - Tile Push Notification Part 22 in Sumit Dutta's WP7 series is about Tile Push Notification... nice tutorial with all the code listed Correctly displaying your current location Morten Nielsen demonstrates formatting the information from the GPS on your WP7 into something intelligible and useful Spiking the Pomodoro Timer Jesse Liberty put up a quick and dirty version of a Pomodoro timer for WP7.1 to explore the technical challenges of the Full Stack Phase 2 he's cranking up 31 Days of Mango | Day #11: Network Jeff Blankenburg's Number 10 in his 31 Days quest of WP7.1 is about the NetworkInformation namespace which gives you all sorts of info on the user's device network connection availability, type, etc. 31 Days of Mango | Day #11: Live Tiles Jeff Blankenburg takes off on Live Tiles for Day 11... big topic for a 1 day post, but he takes off on it... updating and Live Tiles too Working with Prism 4 Part 2: MVVM Basics and Commands Brian Noyes has part 2 of his Prism/MVVM series up at SilverlightShow... very nice tutorial on the basics of getting a view and viewmodel up, and setting up an ICommand to launch an Edit View... plus the code to peruse. PV Basics : Client-side Collections Tony Champion is startig a series on Silverlight 5 and Pivot Viewer... First up is some basics in dealing with the control in SL5 and talking about Client-side Collections... great informative tutorial and all the code Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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