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• Printing entire array in C#

  - by DMan

  I have a simple 2D array: int[,] m = {{0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0} }; How can I print this out onto a text file or something? I want to print the entire array onto a file, not just the contents. For example, I don't want a bunch of zeroes all in a row: I want to see the {{0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0} }; in it.

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• Extracting a string starting with x and ending with y

  - by DMan

  First of all, I did a search on this and was able to find how to use something like String.Split() to extract the string based on a condition. I wasn't able to find however, how to extract it based on an ending condition as well. For example, I have a file with links to images: http://i594.photobucket.com/albums/tt27/34/444.jpghttp://i594.photobucket.com/albums/as/asfd/ghjk6.jpg You will notice that all the images start with http:// and end with .jpg. However, .jpg is succeeded by http:// without a space, making this a little more difficult. So basically I'm trying to find a way (Regex?) to extract a string from a string that starts with http:// and ends with .jpg

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• Generate random platforms without intersection

  - by DMan

  How would I go about generating random platforms without intersection? I think garbage collection and maybe all that checking may be an issue. I've got the generating tiles part down, but not the intersection checking.

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• Increasing number once per mouse click/key press in XNA

  - by DMan

  This has been bothering me lately- when I use some code like below to increase selection every mouse click: if (m.LeftButton == ButtonState.Pressed) currentSelection++; Then currentSelection increases by a ton, simply because this code is in my Update() function and by design, runs every frame and so increases currentSelection. There is almost no chance you can click and release fast enough to prevent currentSelection from increasing more than one. Now my question is what I should do to make it so everytime I click the mouse down once, it only increases currentSelection once until the next time I click down again.

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• A shortest path problem with superheroes and intergalactic journeys

  - by Dman

  You are a super-hero in the year 2222 and you are faced with this great challenge: starting from your home planet Ilop you must try to reach Acinhet or else your planet will be destroyed by evil green little monsters. To do this you are given a map of the universe: there are N planets and M inter-planetary connections ( bidirectional ) that bind these planets. Each connection requires a certain time and a certain amount of fuel in order for you to cover the connection from one planet to another. The total time spent going from one planet to another is obtained by multiplying the time past to cover each connection between all the planets you go through. There are some "key planets", that allow you to refuel if you arrive on those certain "key planets". A "key planet" is the planet with the property that if it disappears the road between at least two planets would be lost.(In the example posted below with the input/output files such a "key planet" is 2 because without it the road to 7 would be lost) When you start your mission you are given the possibility of choosing between K ships each with its own maximum fuel capacity. The goal is to find the SHORTEST TIME CONSUMING path but also choose the ship with the minimum fuel capacity that can cover that shortest path(this means that if more ships can cover the shortest path you choose the one with the minimum fuel capacity). Because the minimum time can be a rather large number (over long long int) you are asked to provide only the last 6 digits of the number. For a better understanding of the task, here is an example of input/output files: INPUT: mission.in 7 8 6 1 4 6 5 9 8 7 10 1 2 7 8 1 4 14 9 1 5 3 1 2 3 1 2 2 7 7 1 3 4 2 2 4 6 4 1 5 6 3 7 On the first line (in order): N M K On the second line :the number for the starting planet and the finishing planet On the third line :K numbers that represent the capacities of the ships you can choose from Then you have M lines, all of them have the same structure: Xi Yi Ti Fi-which means that there is a connection between Xi and Yi and you can cover the distance from Xi to Yi in Ti time and with a Fi fuel consumption. OUTPUT:mission.out 000014 8 1 2 3 4 On the first line:the minimum time and fuel consumption; On the second line :the path Restrictions: 2 = N = 1 000 1 = M = 30 000 1 = K = 10 000 Any suggestions or ideas of how this problem might be solved would be most welcomed.

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• Does the player move or the tiles in a tile-based game?

  - by DMan

  I'm not sure if this question fits properly, but I'm wondering in tile-based games, does the tiles 'shift' when the player is moving (and the player stays in the same place) or does the player move instead (and instead the tiles stay in the same place)?

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• Rotation of two objects in relation

  - by DMan

  I've got a two sprites- I'll say I have a swing and a person. The swing 'swings' back and forth as I passed a rotation variable into spriteBatch.Draw(). Now I want my person to 'sit' on the swing, and am not sure of how to approach it. Since I want a relative to the swing sprite, I tried personPos=swingPos, but that obviously doesn't work as the swing's position is always the same (it's anchored to a point and swings from there). How would I make the person sprite follow the swinging part of the swing sprite, if that makes any sense?

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• Is it possible to send array over network?

  - by DMan

  I'm using C++ and wondering if I can just send an entire int array over a network (using basic sockets) without doing anything. Or do I have to split the data up and send it one at a time?

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• Are functions declared before or after calling them?

  - by DMan

  I've made this a community wiki... Okay, I was looking through someone's code one day and I was annoyed how they declared all their functions first and then later called them below. I guess I'm use to Visual Studio's automatically generated functions, that are made after you call them- and I was wondering, which way do you prefer? Or is there a standard on these kind of things?

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• Fibonacci Function Question

  - by DMan

  I was calculating the Fibonacci sequence, and stumbled across this code, which I saw a lot: int Fibonacci (int x) { if (x<=1) { return 1; } return Fibonacci (x-1)+Fibonacci (x-2); } What I don't understand is how it works, especially the return part at the end: Does it call the Fibonacci function again? Could someone step me through this function?

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• Projects/Challenges for learning programming

  - by DMan

  Not sure if this has been asked before, and I'm making this a wiki... Anyways, I'm sure you've heard of Project Euler. My question is if there are any other sites like this? You know, more challenges and things for programmers to hone their skills? I like Euler but it's strictly math-based, and I'd like to expand it a little to other topics.

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• Easiest way to position camera in XNA?

  - by DMan

  Everytime I load my model into XNA, I can usually see it far off in the distance. When I change some parameters and make it zoom up close, 10/10 times it's rotated funny and I'm set with the task of rotating it. Is there any easy way to do it except by experimenting? Or am I exporting it wrong (using Blender)? Is there any value I should set the objects in my 3d scene to be before exporting it so they appear 'upright'?

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• Project Euler 9 Understanding

  - by DMan

  This question states: A Pythagorean triplet is a set of three natural numbers, a b c, for which, a2 + b2 = c2 For example, 32 + 42 = 9 + 16 = 25 = 52. There exists exactly one Pythagorean triplet for which a + b + c = 1000. Find the product abc. I'm not sure what's it trying to ask you. Are we trying to find a^2+b^2=c^2 and then plug those numbers into a+b+c=1000?

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• Convert .o file to .exe

  - by Dman

  Is it possible to convert an object file .o that was created from a .c source code to .exe? And if it is possible is there a direct command using gcc?

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• Retrieving currently playing song from Windows Media Player (C#)

  - by DMan

  I realize there is a similar question to this, but it really has no information in it. I want to retrieve the currently playing song title (similar to MSN Messenger) within a C# app. The Windows Media Player I want to control is EXTERNAL- that is, it is running on the computer, not within the app. Anyway to do this?

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• Why am I getting a warning that windows is logging on with a temporary profile to run a task scheduler task?

  - by Dan C

  I am having a strange problem with the Windows Server 2008 Task Scheduler. I have to run a small command-line application every few minutes. This application just executes a quick web service call on the localhost and adds an entry to a log file; so it should not need anything special in terms of permissions. First, I created a new user account "my_scheduler" just for the task. This account is a member of the Users group (not sure what other settings I should turn on/off) and set it's password to not expire. I then create a task to run the application every few minutes. I set it to "Run whether user is logged on or not" and turned on "Do not store password. The task will only have access to local resources" (I did this since it's not hitting anything on the network. I did not turn on "Run with highest privileges" since it does not seem to need them. I set the schedule to "After triggered, repeat every 30 minutes for a duration of 1 day" and "Allow task to be run on demand" (no other settings enabled). However, I notice that in the Event Log, I see a bunch of these warnings whenever the task is run: "Windows cannot find the local profile and is logging you on with a temporary profile. Changes you make to this profile will be lost when you log off." Even though I get the warning, the task is executing (I see the log entries appearing). Another (possibly related) issue is that I also see that it's starting multiple copies of the task (within a few seconds of each other) even though it should only start one. This is also a big problem. Any idea how I can fix this? Thanks in advance, Dan

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• Advanced Web Browsing: hitting next with keyboard (single keystroke)

  - by Dan

  I have a website for class that is literally 1000's of pages long, with a next button at the bottom like this: Prev 1 2 3 4 Next With the following code, if that helps: <a href="javascript:gotoModuleObjective(1,1,34,17, 1, 0);">Prev</a> </td> <td align="center" width="10"> <font color="CC0000">1</font> </td> <td align="center" width="10"> <a href="javascript:gotoModuleObjective(1,24,33,2,1,0);">2</a> </td> <td align="center" width="10"> <a href="javascript:gotoModuleObjective(1,24,33,3,1,0);">3</a> </td> <td align="center" width="10"> <a href="javascript:gotoModuleObjective(1,24,33,4,1,0);">4</a> </td> <td align="right" style="white-space:nowrap;" width="30"> <a href="javascript:gotoModuleObjective(1, 24,33,2, 1, 0);">Next</a> </td> The numbers change depending on where you are. I would like to be able to, from the keyboard, hit the next button. I am using windows, but can switch to any browser, if this is only possible is a given browser. If this can be done with just one keystroke that would be wonderful. Like just hitting the forward arrow would automatically bring click the button called next and bring me to the next page. Is this possible? Thanks, Dan

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• VPN - Accessing computer outside of network. Only works one way

  - by Dan

  I could use some help here. My ideal goal is to create a VPN for 2 macs that are in different locations so that they can share each others screens and share files. I basically want to do what Logmein's Hamachi does, but without the 5 user limitation. I have set up the VPN on my Synology NAS at my house using the PPTP protocol. I could also use OpenVPN. The good news is that I can use a laptop outside of my home network to access any computer on my network at my house. The bad news is that I can not do the reverse. I want to use a computer in my home network (same network as the VPN server) to access a computer outside of my network (which is connected via VPN successfully). My internal IP is 192.168.1.xxx PPTP VPN assigns my laptop that is outside of my network with 192.168.5.xxx, but when I try to access it remotely either with afp://192.168.5.xxx or vnc://192.168.5.xxx I can't connect using either. Is this something that I should be able to do or is VPN only one way? I've also tried openvpn with the same results. Thanks for any help! -Dan

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• My IDE is showing "undeclared FileNotFoundException must be caught or thrown"

  - by Dan Czarnecki

  I am having the following issue above. I have tried actually putting a try-catch statement into the code as you will see below, but I can't get the compiler to get past that. import java.io.*; public class DirectoryStatistics extends DirectorySize { /* Dan Czarnecki October 24, 2013 Class variables: private File directory A File object that holds the pathname of the directory to look in private long sizeInBytes A variable of type long that holds the size of a file/directory (in bytes) private long fileCount A variable of type long that holds the number of files in a directory Constructors: public DirectoryStatistics(File startingDirectory) throws FileNotFoundException Creates a DirectoryStatistics object, given a pathname (inherited from DirectorySize class), and has 3 instance variables that hold the directory to search in, the size of each file (in bytes), and the number of files within the directory Modification history: October 24, 2013 Original version of class */ private File directory; private long sizeInBytes; private long fileCount; public DirectoryStatistics(File startingDirectory) throws FileNotFoundException { super(startingDirectory); try { if(directory == null) { throw new IllegalArgumentException("null input"); } if(directory.isDirectory() == false) { throw new FileNotFoundException("the following input is not a directory!"); } } catch(IOException ioe) { System.out.println("You have not entered a directory. Please try again."); } } public File getDirectory() { return this.directory; } public long getSizeInBytes() { return this.sizeInBytes; } public long getFileCount() { return this.fileCount; } public long setFileCount(long size) { fileCount = size; return size; } public long setSizeInBytes(long size) { sizeInBytes = size; return size; } public void incrementFileCount() { fileCount = fileCount + 1; } public void addToSizeInBytes(long addend) { sizeInBytes = sizeInBytes + addend; } public String toString() { return "Directory" + this.directory + "Size (in bytes) " + this.sizeInBytes + "Number of files: " + this.fileCount; } public int hashCode() { return this.directory.hashCode(); } public boolean equals(DirectoryStatistics other) { return this.equals(other); } } import java.io.*; import java.util.*; public class DirectorySize extends DirectoryProcessor { /* Dan Czarnecki October 17, 2013 Class variables: private Vector<Long> directorySizeList Variable of type Vector<Long> that holds the total file size of files in that directory as well as files within folders of that directory private Vector<File> currentFile Variable of type Vector<File> that holds the parent directory Constructors: public DirectorySize(File startingDirectory) throws FileNotFoundException Creates a DirectorySize object, takes in a pathname (inherited from DirectoryProcessor class, and has a single vector of a DirectoryStatistics object to hold the files and folders within a directory Modification History October 17, 2013 Original version of class Implemented run() and processFile() methods */ private Vector<DirectoryStatistics> directory; /* private Vector<Long> directorySizeList; private Vector<File> currentFile; */ public DirectorySize(File startingDirectory) throws FileNotFoundException { super(startingDirectory); directory = new Vector<DirectoryStatistics>(); } public void processFile(File file) { DirectoryStatistics parent; int index; File parentFile; System.out.println(file.getName()); System.out.println(file.getParent()); parentFile = file.getParentFile(); parent = new DirectoryStatistics(parentFile); System.out.println(parent); parent.equals(parent); index = directory.indexOf(parent); if(index == 0) { directory.elementAt(index).addToSizeInBytes(file.length()); directory.elementAt(index).incrementFileCount(); } if(index < 0) { directory.addElement(parent); directory.lastElement().setSizeInBytes(file.length()); directory.lastElement().incrementFileCount(); } Could someone tell me why I'm getting this issue?

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• Silverlight TV with Myself, John Papa, Shawn Wildermuth and Ward Bell

  - by dwahlin

  I had the chance to go on a live episode of Channel 9 while at DevConnections and had a lot of fun chatting about various Silverlight topics and answering some fairly unique questions posted on Twitter.  Here’s more info on the episode from John Papa’s blog: John interviews a panel of 3 well known Silverlight leaders including Shawn Wildermuth, Dan Wahlin, and Ward Bell at the Silverlight 4 launch event. The guest panel answers questions sent in from Twitter about the features in Silverlight 4, thoughts on MVVM, and the panel members' experiences developing Silverlight. This is a great chance to hear from some of the leading Silverlight minds. These guys are all experts at building business applications with Silverlight. Relevant links: John's Blog and on Twitter (@john_papa) Shawn's Blog and on Twitter (@shawnwildermuth) Dan's Blog and on Twitter (@danwahlin) Ward's Blog and on Twitter (@wardbell) Silverlight Training Course on Channel 9 Follow us on Twitter @SilverlightTV or on the web at http://silverlight.tv You can see the episode online by clicking the image below:

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• IOUC Summit: Open Arms and Cheese Shoes

  - by Justin Kestelyn

  Last week's International Oracle User Group Committee (IOUC) Summit at Oracle HQ was a high point of the past year, for a number of reasons: A "quorum" of Java User Group leaders, several Java Champions among them, were in attendance (Bert Breeman, Stephan Janssen, Dan Sline, Stephen Chin, Bruno Souza, Van Riper, and others), and it was great to get face time with them. Their guidance and advice about JavaOne and other things are always much appreciated. Mix in some Oracle ACE Directors (Debra Lilley, Dan Morgan, Sten Vesterli, and others), and you really have the making of a dynamic group. Stephan describes it best: "We (the JUG Leaders) discovered that behind the more formal dress code the ACE directors are actually as crazy as we are." (See link below for more.) Thanks to Bert's (NLJug) kindness, I am now the proud owner of a bonafide, straight-from-the-NL cheese shoe. How the heck did he get this through security? I suggest that you also read more robust reports from Stephan, Arun Gupta, and of course "Team Stanley."

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• WPF Toolkit DataGrid SelectionChanged Getting Cell Value

  - by Dan Bater

  Hi, Please help me, Im trying to get the value of Cell[0] from the selected row in a SelectionChangedEvent. I am only managing to get lots of different Microsoft.Windows.Controls and am hoping im missing something daft. Hoping I can get some help from here... private void datagrid_SelectionChanged(object sender, SelectionChangedEventArgs e) { Microsoft.Windows.Controls.DataGrid _DataGrid = sender as Microsoft.Windows.Controls.DataGrid; } I was hoping it would be something like... _DataGrid.SelectedCells[0].Value; However .Value isn't an option.... Many many thanks this has been driving me mad! Dan

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• DateTimePicker not updating dataset

  - by Dan

  I'm binding a DateTimePicker control to my dataset (which is linked to a database). However, unless the user changes the date on that control, the dataset seems to contain null for that entry (even though the Value entry of the control isn't null). I've done a bit of googling, and there's a lot of talk about people having troubles with the DateTimePicker not supporting null values. However, I DON'T want it to support a NULL value. The column in my database table is set to "NOT NULL". It's as if the dataset isn't updating itself from the DateTimePicker control unless the user changes the date. I've tried explicitly setting the date for the control in code (using DateTimePicker.Value = DateTime.Now). This still doesn't update the dataset side. Thankyou for any help, Dan.

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• Graph theory in python

  - by Dan

  I was wondering how people deal with graph theory in python? How is a graph stored? Are there libraries for this? For example how would I input a graph and then find its Chromatic polynomial? Or its girth? Or the number of unique spanning trees? How about problems that involve edge weight like salesman problems? I don't need all of these answered, I'm just looking for a method or tool set that will be able to help me approach solve problems like this. Thanks, Dan

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• Eclipse thinks there are problems with my Android project...

  - by Dan Watling

  I have an Android project and Eclipse is telling me my project has an error with its build path. Specifically, the problem view shows "The project cannot be built until build path errors are resolved". The entire project builds just fine, meaning there are no red X's on any of the files. I can build the project outside of Eclipse, deploy it to the device, and it runs just fine, so I know there isn't a problem with my source code or layouts. The strange thing is when I remove the 'src' folder from the build path in Eclipse, clean and build the project, then re-add the 'src' folder to the build path and build the project it works again. However, within a few changes it gives me the same problem. Has anyone else encountered this before? Does anyone know of a solution? It's driving me mad! Thanks, -Dan

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