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C++ Serialization Clean XML Similar to XSTREAM

- by disown

I need to write a linux c++ app which saves it settings in XML format (for easy hand editing) and also communicates with existing apps through XML messages over sockets and HTTP. Problem is that I haven't been able to find any intelligent libs to help me, I don't particular feel like writing DOM or SAX code just to write and read some very simple messages. Boost Serialization was almost a match, but it adds a lot of boost-specific data to the xml it generates. This obviously doesn't work well for interchange formats. I'm wondering if it is possible to make Boost Serialization or some other c++ serialization library generate clean xml. I don't mind if there are some required extra attributes - like a version attribute, but I'd really like to be able to control their naming and also get rid of 'features' that I don't use - tracking_level and class_id for instance. Ideally I would just like to have something similar to xstream in Java. I am aware of the fact that c++ lacks introspection and that it is therefore necessary to do some manual coding - but it would be nice if there was a clean solution to just read and write simple XML without kludges! If this cannot be done I am also interested in tools where the XML schema is the canonical resource (contract first) - a good JAXB alternative to C++. So far I have only found commercial solutions like CodeSynthesis XSD. I would prefer open source solutions. I have tried gSoap - but it generates really ugly code and it is also SOAP-specific. In desperation I also started looking at alternative serialization formats for protobuffers. This exists - but only for Java! It really surprises me that protocol buffers seems to be a better supported data interchange format than XML. I'm going mad just finding libs for this app and I really need some new ideas. Anyone?

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Accessing selected node of richfaces tree from Javascript

- by kazanaki

Hello This should be a very simple question. I have a richfaces tree that is rendered using JSF. When the user clicks on a node I want a javascript function to run. Nothing more nothing less. No redirects, no re-submit, no-rerender, no Ajax. Just plain old Javascript. I have seen the onselected attribute of the tree and it indeed fires a Javascript method. But of course I want to know which node was clicked. Here is what I have so far <head> <script type="text/javascript"> function documentClicked(nodeRef) { alert("Node is "+nodeRef); } </script> </head> <rich:tree switchType="client" value="#{ajaxDocumentTree.rootNode}" var="document" onselected="documentClicked()" > <rich:treeNode iconLeaf="../images/tree/doc.gif" icon="../images/tree/doc.gif"> <h:outputText value="#{doc.friendlyName}" /> </rich:treeNode> But this does not work because nodeRef is undefined. I expected that the first argument of the callback would be the selected node but this is not the case. So the question is this: How do I fire a Javascript function with the selected node from a richfaces tree?

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How would I make a mouse controlled physics object in Box2D / AS3?

- by Marty Wallace

I recently created this tennis game using my own basic physics: http://martywallace.com/sandbox/tennis/ Basically a tennis racquet sticks to your mouse and you can hit the tennis balls upward. The physics aren't that great, and I want to make a more interesting version of this game with milestones and levels in Flash. I am planning to use Box2D because I have moderate experience with it. I'm not sure how to go about creating the racquet - as far as I understand Box2D, the racquet needs a velocity to influence the velocities of the balls when you hit them (so that you can hit them harder or softer upward to keep them up). With that said, I'm assuming I can't just have a kinematic body that will have its position set to the mouse, because it won't affect the velocities of the balls as expected. I've also thought about setting the velocity to the difference between the racquet position and the mouse each frame, but I am concerned that won't provide accurate positioning and am also thinking that the velocity could end up really large if you move the mouse quickly. What is the correct way to have a physics object locked to the mouse but also to have its displacement in the last frame (from where it was to the mouse) affect the balls?

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Calculate total batch upload transfer percent with limited information

- by GONeale

Hi there, I have a system which uploads to a server file by file and displays a progress bar on file upload progress, then underneath a second progress bar which I want to indicate percentage of batch complete across all files queued to upload. Information and algorithms I can work out are: Bytes Sent / Total Bytes To Send = First progress bar (eg. 512KB of 1024KB (50%)) That works fine. However supposing I have two other files left to upload, but both file sizes are unknown (as this is only known once the file is about to commence upload, at which point it is compressed and file size is determined) how would I go about making my third progress bar? I didn't think this would be possible as I would need "Total Bytes Sent" / "Total Bytes To Send", to replicate the logic of my first progress bar on a larger scale, however I did get a version working: "Current file number we are on" / "total number of files to send" returning the percentage through the batch, however obviously will not incrementally update and it's pretty crude. So on further thinking I thought if I could incorporate the current file % with this algorithm I could perhaps get the correct progress percentage of my batch's current point. I tried this algorithm, but alas to no such avail (sorry to any math heads, it's probably quite apparent why it won't work) ("Current file number we are on" / "total number of files to send") * ("Bytes Sent" / "Total Bytes To Send") For example I thought I was on the right track when testing with this example: 2/3 (2nd of 3rd file) = 66% (this is right so far) but then when I added * 0.20 (for indicating only 20% of 2nd file has uploaded) we went back to 13%. What I need is only a little over 33%! I did try the inverse at 0.80 and a (2/3 * (2/3 * 0.2)) Can this be done without knowing entire bytes in batch to upload? Please help! Thank you!

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Sending mail with a Php with a pdf attachment

- by Jake

Hi, I'm trying to send an email from the php mail command. I've been able to what I've tried so far, but can't seem to get it to work with an attachment. I've looked around the web and the best code I've found led me to this: $fileatt_name = 'JuneFlyer.pdf'; $fileatt_type = 'application/pdf'; $fileatt = 'JuneFlyer.pdf'; $file = fopen($fileatt,'rb'); $data = fread($file,filesize($fileatt)); $data = chunk_split(base64_encode($data)); $MAEmail = "[email protected]"; mail("$email_address", "$subject", "$message", "From: ".$MAEmail."\n". "MIME-Version: 1.0\n". "Content-type: text/html; charset=iso-8859-1". "--{$mime_boundary}\n" . "Content-Type: {$fileatt_type};\n" . " name=\"{$fileatt_name}\"\n" . "Content-Disposition: attachment;\n" . " filename=\"{$fileatt_name}\"\n" . "Content-Transfer-Encoding: base64\n\n" .$data. "\n\n" ); There are two problems when I do this. First, the contents of the email dissappear. Second, there is an error on the attachment. "Adobe Reader could not open June_flyer.pdf because it is either not a supported file type or because the file has been damaged (for example it was sent as an email attachment and wasn't correctly decoded)" Any ideas of how to deal with this? Thanks, JB

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Getting nice sound from Java

- by Peter Lang

I managed to play midi files using Java, but it produces some distracting noise. I figured out that this is caused by the poor quality soundbank file shipped with Java 6 SDK/JRE. How can I improve that quality? Here is what I have so far: MidiNote example using a Receiver works fine (sounds the same as when playing midi files with other players), so it does not seem to use the Soundbank shipped with Java but the fallback mechanism that uses a hardware MIDI port. Using SimpleMidiPlayer example to play a Midi file works, but the quality is poor. When I delete lib/audio/soundbank.gm, the quality is not bad any more, so the fallback is used again. When I put soundbank-deluxe.gm into the same directory, it is used and produces much better sound. Messing with the clients soundbank file as described in the official Installation Instructions certainly isn't an option, so I tried to put the new soundbank-file into the jar-file and load it: Soundbank soundbank = MidiSystem.getSoundbank( getClass().getResourceAsStream("soundbank-deluxe.gm")); if(synthesizer.isSoundbankSupported(soundbank)) { System.out.println(synthesizer.loadAllInstruments(soundbank)); } This prints true, but the sound remains unchanged. What am I doing wrong loading the soundbank file? Can I force the hardware MIDI port to be used instead of the standard soundbank file?

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XML/C#: Read content if only if attribute is correct

- by Zach

Hi Guys, I have an XML file as follows, and I'm trying to read the content of the Name tag, only if the attribute of the Record tag is what I want. (continued below code) The XML file is: <?xml version="1.0" encoding="utf-8" ?> <Database> <Record Number="1"> <Name>John Doe</Name> <Position>1</Position> <HoursWorked>290</HoursWorked> <LastMonthChecked>0310</LastMonthChecked> </Record> <Record Number="2"> <Name>Jane Doe</Name> <Position>1</Position> <HoursWorked>251</HoursWorked> <LastMonthChecked>0310</LastMonthChecked> </Record> </Database> This is the C# code I have so far: public static string GetName(int EmployeeNumber) { XmlTextReader DataReader = new XmlTextReader("Database.xml"); DataReader.MoveToContent(); while (DataReader.Read()) { if (DataReader.NodeType == XmlNodeType.Element && DataReader.HasAttributes && DataReader.Name == "Record") { DataReader.MoveToAttribute(EmployeeNumber); DataReader.MoveToContent(); if (DataReader.NodeType == XmlNodeType.Element && DataReader.Name == "Name") { return DataReader.ReadContentAsString(); } } } } So for example, if 2 is passed to the function, I want it to return the string "Jane Doe". I'm new to XML parsing, so any help would be appreciated. Thanks.

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Nokogiri HttParty Xpath Ruby on Rails

- by Brian

I am working with a mmorpg (Eve Online) request that returns xml. I am using httparty for the request and I am trying to use nokogiri to obtain attribute values for a specific element. Here's an example of the response: <eveapi version="2"><currentTime>2012-10-19 22:41:56</currentTime><result><rowset name="transactions" key="refID" columns="date,refID,refTypeID,ownerName1,ownerID1,ownerName2,ownerID2,argName1,argID1,amount,balance,reason,taxReceiverID,taxAmount"><row date="2012-10-18 23:41:50" refID="232323" refTypeID="9" ownerName1="University of Caille" ownerID1="32232" ownerName2="name" ownerID2="34343" argName1="" argID1="0" amount="5000.00" balance="5000.00" reason="Starter fund" taxReceiverID="" taxAmount=""/></rowset></result><cachedUntil>2012-10-19 23:03:40</cachedUntil></eveapi> I only need to access attributes for the element "row" and there can be many rows returned. I have read about xpath and from what I understand if I do the following it should return all rows: doc.xpath('row') however it does not return anything. Here's what I have so far: options = {:keyID => 111111, :vCode => 'fddfdfdfdf'} response = HTTParty.post('https://api.eveonline.com/char/WalletJournal.xml.aspx', :body => options) doc = Nokogiri::XML(response.body) doc.xpath('row').each do |r| end The loop is never executed. What am I doing wrong? I need to return all row elements and gain access to each of the row's attributes. Thanks.

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In Java, howd do I iterate through lines in a textfile from back to front

- by rogue780

Basically I need to take a text file such as : Fred Bernie Henry and be able to read them from the file in the order of Henry Bernie Fred The actual file I'm reading from is 30MB and it would be a less than perfect solution to read the whole file, split it into an array, reverse the array and then go from there. It takes way too long. My specific goal is to find the first occurrence of a string (in this case it's "InitGame") and then return the position beginning of the beginning of that line. I did something like this in python before. My method was to seek to the end of the file - 1024, then read lines until I get to the end, then seek another 1024 from my previous starting point and, by using tell(), I would stop when I got to the previous starting point. So I would read those blocks backwards from the end of the file until I found the text I was looking for. So far, I'm having a heck of a time doing this in Java. Any help would be greatly appreciated and if you live near Baltimore it may even end up with you getting some fresh baked cookies. Thanks!

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Pulling info from database and dynamically adding them into different divs

- by Matt Nathanson

This may be a bit of a php n00b question but i've managed to get it working this far and I'm a little bit stuck. I'm pulling 12 images with descriptions out of a database. I want to insert them into a client rotator that has 3 sets of 4. They will be contained in divs called clientrotate1, clientrotate2, and clientrotate3 respectively. Inside each of those divs I want to have 4 images with classes thumb1, thumb2, thumb3, and thumb4 I am successful in having the images and descriptions pull into clientrotator 1. Where I get stuck is to how to dynamically add the 2nd and 3rd set of data into clientrotator2 and clientrotator3. Here is my function: public function DisplayClientRotator(){ $result = mysql_query( 'SELECT * FROM project ORDER BY id DESC LIMIT 12' ) or die("SELECT Error: ".mysql_error()); $iterator = 1; while ($row = mysql_fetch_assoc($result)) { echo "<div id='clientrotate1'>"; echo "<div class='thumb$iterator'>"; echo "<img style='width: 172px; height: 100px;' src=".$row['photo']." />"; echo "<div class='transbox'>"; echo "<div class='thumbtext'>"; echo $row['campaign']; echo "</div>"; echo "</div>"; echo "</div>"; echo "</div>"; $iterator++; } Any help or pointers int he right direction would be greatly appreciated! Thanks so much, Matt

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Problem mapping HttpHandler --> HTTP Error 404 Not Found

- by JohnIdol

I am having problems trying to map an HttpHandler in the web.config. This is the relevant config bit: <httpHandlers> <add verb="*" path="*.hndlr" type="MyAssembly.MyHandler, MyAssembly" validate="false" /> </httpHandlers> When I navigate to http://localhost/myApp/whatever.hndlr I am getting a server error 404 (not found). It's the 1st time I am hooking up an HttpHandler so I might be missing something - any help appreciated! UPDATE: I managed to get it working using both answers so far - who's able to exaplin why it works gets the answer marked! This is my config (won't work if Don't have both - I am running IIS7 in classic mode) System.web: <httpHandlers> <add verb="*" path="*MyHandler.hndlr" type="MyAssembly.MyAssemblyHandler, MyAssembly" validate="false"/> </httpHandlers> System.webserver: <handlers> <add name="MyHandler" verb="*" path="*MyHandler.hndlr" type="MyAssembly.MyAssemblyHandler, MyAssembly" validate="false"/> </handlers>

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What are some programming techniques for converting SD images to HD images

- by Dr Dork

I'm taking programming class and instructor loves to work with images so most of our assignments involve manipulating raw RGB image data. One of our assignments is to implement a standard image converter that converts SD images to HD images and vice versa. I always take advantage of these types of assignments to go a little beyond what we were asked to do, so I added a basic anti-aliasing process that uses the average pixel color of the 3x3 surrounding pixels to improve the converted image. While it helps a bit, the resulting image still doesn't look good, which is ok because it's not expected to for the assignment. I've learned that converting an SD to HD images has shown to be much harder than down sampling to SD from HD just because SD to HD effectively involves increasing resolution when it is not there. Obviously, it is hard to create pixels from nothing, but I'd like enhance my anti-aliasing to something that provides better results when upscaling an image. Most of the techniques I find and read on the internet are far beyond my level of image processing and programming. Can anybody suggest any better methods or processes to create good HD content from SD content that may be within my programming skill level? I know that's a difficult thing to gauge since you don't know me, but perhaps knowing that I can write c++ code to read in raw RGB data and upscale/downscale it with simple average-anti-aliasing will give you an idea. Thanks in advance for all your help!

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Go: using a pointer to array

- by Sean

I'm having a little play with google's Go language, and I've run into something which is fairly basic in C but doesn't seem to be covered in the documentation I've seen so far When I pass a pointer to an array to a function, I presumed we'd have some way to access it as follows: func conv(x []int, xlen int, h []int, hlen int, y *[]int) for i := 0; i<xlen; i++ { for j := 0; j<hlen; j++ { *y[i+j] += x[i]*h[j] } } } But the Go compiler doesn't like this: sean@spray:~/dev$ 8g broke.go broke.go:8: invalid operation: y[i + j] (index of type *[]int) Fair enough - it was just a guess. I have got a fairly straightforward workaround: func conv(x []int, xlen int, h []int, hlen int, y_ *[]int) { y := *y_ for i := 0; i<xlen; i++ { for j := 0; j<hlen; j++ { y[i+j] += x[i]*h[j] } } } But surely there's a better way. The annoying thing is that googling for info on Go isn't very useful as all sorts of C\C++\unrelated results appear for most search terms.

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iPhone developer cert not associating with Provisioning Profiles

- by baudot

I'm seeing the dreaded "Code Sign error: The identity 'iPhone Developer' doesn't match any valid certificate/private key pair in the default keychain" error. Strange, as it used to work. Not sure what changed. A few of the symptoms I've noticed beyond this: In the project info, for Code Signing Identity, instead of saying "iPhone Developer: My Name Here", it only says "iPhone Developer", followed by a list of grayed out Provisioning Profiles with the error message "profile doesn't match any valid certificate/private key pair in the keychain." In the organizer, if I click the "Developer Profile" sidebar entry, it shows one entry in the "Identities" pane, "iPhone Distribution: My Name Here". However, no profiles show in the Provisioning Profiles pane. In the organizer, if I click the "Provisioning Profiles" sidebar entry, for each of the profiles there it reports "A valid signing identity matching this profile could not be found in your keychain." I've tried a handful of the usual folk cures for this ailment, without success so far, such as: Cleared my old keypairs and expired developer identity cert out of the keychain. Deleted my old developer profile, created a new one, and regenerated the provisioning profile after. Reconfirmed: The App ID on the provisioning portal for this app is a pure wildcard ID. (The "Bundle Identifier" in the info.plist is just the appname, no reversed domain prefix.) Restored my iPhone. Overstalled the latest version of Xcode.

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Should I use a collection here?

- by Eva

So I have code set up like this: public interface IInterface { public void setField(Object field); } public abstract class AbstractClass extends JPanel implements IInterface { private Object field_; public void setField(Object field) { field_ = field; } } public class ClassA extends AbstractClass { public ClassA() { // unique ClassA constructor stuff } public Dimension getPreferredSize() { return new Dimension(1, 1); } } public class ClassB extends AbstractClass { public ClassB() { // unique ClassB constructor stuff } public Dimension getPreferredSize() { return new Dimension(42, 42); } } public class ConsumerA { public ConsumerA(Collection<AbstractClass> collection) { for (AbstractClass abstractClass : collection) { abstractClass.setField(this); abstractClass.repaint(); } } } All hunky-dory so far, until public class ConsumerB { // Option 1 public ConsumerB(ClassA a, ClassB b) { methodThatOnlyTakesA(a); methodThatOnlyTakesB(b); } // Option 2 public ConsumerB(Collection<AbstractClass> collection) { for (IInterface i : collection) { if (i instanceof ClassA) { methodThatOnlyTakesA((ClassA) i); else if (i instanceof ClassB) { methodThatOnlyTakesB((ClassB) i); } } } } public class UsingOption1 { public static void main(String[] args) { ClassA a = new ClassA(); ClassB b = new ClassB(); Collection<AbstractClass> collection = Arrays.asList(a, b); ConsumerA consumerA = new ConsumerA(collection); ConsumerB consumerB = new ConsumerB(a, b); } } public class UsingOption2 { public static void main(String[] args) { Collection<AbstractClass> collection = Arrays.asList(new ClassA(), new ClassB()); ConsumerA = new ConsumerA(collection); ConsumerB = new ConsumerB(collection); } } With a lot more classes extending AbstractClass, both options get unwieldly. Option1 would make the constructor of ConsumerB really long. Also UsingOption1 would get long too. Option2 would have way more if statements than I feel comfortable with. Is there a viable Option3? If it helps, ClassA and ClassB have all the same methods, they're just implemented differently. Thanks for slogging through my code!

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Show me your Linq to SQL architectures!

- by Brad Heller

I've been using Linq to SQL for a new implementation that I've been working on. I have about 5000 lines of code and am a little ways from a solid demo. I've been pretty satisfied with Linq to SQL so far -- the tools are excellent and pretty painless and it allows you to get a DAL up and running quickly. That said, there are some major draw backs that I just keep hitting over and over again. Namely how to handle separation of concerns between my DAL and my business layer and juggling that with different data contexts. Here is the architecture I've been using: My repositories do all my data access and they return Linq to SQL objects. Each of my Linq to SQL objects implements an IDetachable interface. A typical implementation looks like this: partial class PaymentDetail : IDetachable { #region IDetachable Members public bool IsAttached { get { return PropertyChanging != null; } } public void Detach() { if (IsAttached) { PropertyChanged = null; PropertyChanging = null; Transaction.Detach(); } } #endregion } Every time I do a DAL operation in my repository I "detach" when I'm done with the object (and it should theoretically detach from any child objects) to remove the DataContext's context. Like I said, this works pretty well, but there are some edge cases that seem to be a big pain in the ass. For instance, my Transaction object has many PaymentDetails. Even when there are no PaymentDetails in that collection it's still attached to the DataContext's context! Thus, if I try to update (I update by Attach()ing to the object and then SubmitChanges()) I get that dreaded "An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext. This is not supported." message. Anyway, I'm starting to doubt that this technology was a good gamble. Has anyone got a decent architecture that they're willing to share? I'd really love to use this technology but I feel like I spend 1/3 of my time just debugging is retarded quirks!

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Using PHP to display button with hyperlink or greyed out button if no URL in database

- by Diane

I've got a webpage that I'm working on where you click on a letter or category and it displays records matching that query from a database. One of the things I want to display is a hyperlinked button that says "Website" if the database record contains a URL in the 'URL' field, and if there is no value in that field, it will display a greyed out version of that button. I tried using an if...else statement, but was absolutely unable to get the syntax correct trying to get php to call up the 'URL' value in the middle of an "echo " So here's what I did: <?php if($row_rsmemalpha['URL'] != NULL) ?><a href="http://<?php echo ($row_rsmemalpha['URL']);?>"><target ="_blank"><img src="web_button_on.gif" alt="Website" border="0" height="18" width="103" /></target></a> <?php if($row_rsmemalpha['URL'] == NULL) echo "<img src=\"web_button_off.gif\" alt=\"No Website Available\" height=\"18\" width=\"103\" />"; ?> If there is a URL available it shows the button properly. But if there isn't a URL in the database it shows both buttons. I have spent a few days studying examples and tutorials on the web, but haven't found too much that helps. The buttons were completely non-functional when I started, so I'm pretty proud of getting this far with it! I've just run out of time and patience for more trial-and-error experimenting. Any help is appreciated... Diane

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Convert a Unit Vector to a Quaternion

- by Hmm

So I'm very new to quaternions, but I understand the basics of how to manipulate stuff with them. What I'm currently trying to do is compare a known quaternion to two absolute points in space. I'm hoping what I can do is simply convert the points into a second quaternion, giving me an easy way to compare the two. What I've done so far is to turn the two points into a unit vector. From there I was hoping I could directly plug in the i j k into the imaginary portion of the quaternion with a scalar of zero. From there I could multiply one quaternion by the other's conjugate, resulting in a third quaternion. This third quaternion could be converted into an axis angle, giving me the degree by which the original two quaternions differ by. Is this thought process correct? So it should just be [ 0 i j k ]. I may need to normalize the quaternion afterwards, but I'm not sure about that. I have a bad feeling that it's not a direct mapping from a vector to a quaternion. I tried looking at converting the unit vector to an axis angle, but I'm not sure this would work, since I don't know what angle to give as an input.

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GridView: How can I get rid of extra space from my GirdView object?

- by Lajos Arpad

Hello, I'm writing an application for Android phones for Human vs. Human chess play over the internet. I was looking at some tutorials, to learn how to develop Android applications and found a very nice example of making galleries (it was a GridView usage example for making a gallery about dogs) and the idea came to draw the chess table using a GridView, because the example project also handled the point & click event and I intended to use the same event in the same way, but for a different purpose. The game works well (currently it's a hotseat version), however, I'm really frustrated by the fact that whenever I rotate the screen of the phone, my GridView gets hysterical and puts some empty space in my chess table between the columns. I realized that the cause of this is that the GridView's width is the same as its parent's and the GridView tries to fill its parent in with, but there should (and probably is) be a simple solution to get rid of this problem. However, after a full day of researching, I haven't found any clue to help me to make a perfect drawing about my chess table without a negative side effect in functionality. The chess table looks fine if the phone is in Portrait mode, but in Landscape mode it's far from nice. This is how I can decide whether we are in Portrait or Landscape mode: ((((MainActivity)mContext).getWindow().getWindowManager().getDefaultDisplay().getWidth()) < ((MainActivity)mContext).getWindow().getWindowManager().getDefaultDisplay().getHeight()) In the main.xml file the GridView is defined in the following way: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <GridView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/gridview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:numColumns="8" android:verticalSpacing="0dp" android:horizontalSpacing="0dp" android:stretchMode="columnWidth" android:gravity="center" > </GridView> ... </LinearLayout> I appreciate any help with the problem and thank you for reading this.

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SubViewTwoController undeclared (first use in this function) (obj-c)

- by benny

Ahoy hoy everyone :) Here is a list of links. You will need it when reading the post. I am a newbie to Objective-C and try to learn it for iPhone-App-Development. I used the tutorial linked in the link list to create a standard app with a simple basic Navigation. This app contains a "RootView" that is displayed at startup. The startup screen itself contains three elements wich all link to SubViewOne. I have got it to work this far. So what i want to change is to make the second element link to SubViewTwo. When i "Build and Go" it, i get the following errors: RootViewController.m: SubViewTwoController *subViewTwoController = [[SubViewTwoController alloc] init]; // SubViewTwoController undeclared (first use in this function) and in SubViewTwoController.m [super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview no superclass declared in @interface for ´SubViewTwoController´ and the same thing after - (void)dealloc { [super dealloc]; I think you will also need the header files, so here they are! RootViewController.h #import <UIKit/UIKit.h> @interface RootViewController : UITableViewController { IBOutlet NSMutableArray *views; } @property (nonatomic, retain) IBOutlet NSMutableArray *views; @end SubViewOneController.h #import <UIKit/UIKit.h> @interface SubViewOneController : UIViewController { IBOutlet UILabel *label; IBOutlet UIButton *button; } @property (retain,nonatomic) IBOutlet UILabel *label; @property (retain,nonatomic) IBOutlet UIButton *button; - (IBAction) OnButtonClick:(id) sender; @end and SubViewTwoController.h #import <UIKit/UIKit.h> @interface SubViewTwo : UIViewController { IBOutlet NSMutableArray *views; } @end I would be really great if you would leave your ideas with a short explanation. Thanks a lot in advance! benny

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Correct Interactive Website System Design Concepts / Methods?

- by Xandel

Hi all, I hope this question isn't too open ended, but a nudge in the right direction is all I need! I am currently building an online accounting system - the idea is that users can register, log in, and then create customers, generate invoices and other documents and eventually print / email those documents out. I am a Java programmer but unfortunately haven't had too much experience in web projects and their design concepts... This is what I have got thus far - A Tomcat web server which loads Spring. Spring handles my DAO's and required classes for the business logic. Tomcat serves JSP's containing the pages which make up the website. To make it interactive I have used JavaScript in the pages (jQuery and its AJAX calls) to send and receive JSON data (this is done by posting to a page which calls a handleAction() method in one of my classes). My question is, am I tackling this project in the right way? Am I using the right tools and methods? I understand there are literally countless ways of tackling any project but I would really love to get feedback with regards to tried and tested methods, general practices etc. Thanks in advance! Xandel

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How do I supply extra info to IApplicationSettingsProvider class?

- by joebeazelman

Perhaps this question has been asked before in a different way, but I haven’t been able to find it. I have one or more plugin adapter assemblies in my application all having the type IPlugin, for instance. Each adapter has its own settings structures stored in a common directory. Whether they are stored in one contiguous file or in separate ones doesn’t matter. Each adapter can have one or more settings associated with it. The settings will have both a name and the Plugin it will be used for. How would I create such a configuration system using the following requirements: I want to use .NETs built in settings system and avoid writing one from scratch The host application will be responsible for locating the plugin settings and passing it to the plugin Each plugin will be responsible for reading and writing its own settings to separate concerns. The host application should call Plugin.Save(thePath) and it does its thing. All settings are user scoped So far, I realize that I would need to write my own SettingsProvider, but the provider seems to work in isolation in that there’s no way to pass it parameters such as the path of the plugin directory and the name of the settings. All of the example code I've seen has the provider getting the data from the runtime environment.

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Simple code to expire Drupal cookie?

- by user310594

With a single click this simple script will do a multi-logout of: Moodle Elgg 2 MyBB's and (not) Drupal. <?php setcookie( 'Elgg', '', -3600, '/', '.domain.com', false, false); setcookie( 'http_auth_ext_complete', '1', -3600, '/d/', '.domain.com', false, false); // setcookie( 'http_auth_ext_complete', '1', -3600, '/d/', 'domain.com', false, false); setcookie( 'mybbuser', '', -3600, '/', '.domain.com', false, false); setcookie( 'mybbuser', '', -3600, '/bb/', '.domain.com', false, false); // unset all 3 Moodle cookies, the lazy way if (isset($_SERVER['HTTP_COOKIE'])) { $cookies = explode(';', $_SERVER['HTTP_COOKIE']); foreach($cookies as $cookie) { $parts = explode('=', $cookie); $name = trim($parts[0]); setcookie($name, '', time()-1000); setcookie($name, '', time()-1000, '/'); } } ?> This works on four sites but the Drupal cookie won't quit. How can I do the same with Drupal? Note: Drupal uses 'host' instead of 'domain', neither with or without the '.' works so far. Thank you.

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What is faster- Java or C# (Or good old C)?

- by Rexsung

I'm currently deciding on a platform to build a scientific computational product on, and am deciding on either C#, Java, or plain C with Intels compiler on Core2 Quad CPU's. It's mostly integer arithmetic. My benchmarks so far show Java and C are about on par with each other, and dotNET/C# trails by about 5%- however a number of my coworkers are claiming that dotNET with the right optimizations will beat both of these given enough time for the JIT to do its work. I always assume that the JIT would have done it's job within a few minutes of the app starting (Probably a few seconds in my case, as it's mostly tight loops), so I'm not sure whether to believe them Can anyone shed any light on the situation? Would dotNET beat Java? (Or am I best just sticking with C at this point?). The code is highly multithreaded and data sets are several terabytes in size. Haskell/erlang etc are not options in this case as there is a significant quantity of existing legacy C code that will be ported to the new system, and porting C to Java/C# is a lot simpler than to Haskell or Erlang. (Unless of course these provide a significant speedup). Edit: We are considering moving to C# or Java because they may, in theory, be faster. Every percent we can shave off our processing time saves us tens of thousands of dollars per year. At this point we are just trying to evaluate whether C, Java, or c# would be faster.

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WPF In-Memory Image Display

- by Aren B

Im trying to build an Item Template for my list-view and im bound to a list of Entities. The entity I have has a System.Drawing.Image that I'd like to display, but so far I cannot for the life of me figure out how to bind it to the <Image> block. Every example and documentation I can find on the internet pertains to Images accessible via an uri i.e. File on HDD or On Website <DataTemplate x:Key="LogoPreviewItem"> <Border BorderBrush="Black" BorderThickness="1"> <DockPanel Width="150" Height="100"> <Image> <Image.Source>  </Image.Source> </Image> <Label DockPanel.Dock="Bottom" Content="{Binding CustomerName}" /> </DockPanel> </Border> </DataTemplate>

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