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• Implementing Dijkstra's Algorithm

  - by DeadMG

  I've been tasked (coursework @ university) to implement a form of path-finding. Now, in-spec, I could just implement a brute force, since there's a limit on the number of nodes to search (begin, two in the middle, end), but I want to re-use this code and came to implement Dijkstra's algorithm. I've seen the pseudo on Wikipedia and a friend wrote some for me as well, but it flat out doesn't make sense. The algorithm seems pretty simple and it's not a problem for me to understand it, but I just can't for the life of me visualize the code that would realize such a thing. Any suggestions/tips?

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• What is your favourite Windbg tip/trick?

  - by user15071

  I have come to realize that Windbg is a very powerful debugger for the Windows platform & I learn something new about it once in a while. Can fellow Windbg users share some of their mad skills? ps: I am not looking for a nifty command, those can be found in the documentation. How about sharing tips on doing something that one couldn't otherwise imagine could be done with windbg? e.g. Some way to generate statistics about memory allocations when a process is run under windbg.

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• Regex: absolute url to relative url (C#)

  - by splatto

  I need a regex to run against strings like the one below that will convert absolute paths to relative paths under certain conditions. <p>This website is <strong>really great</strong> and people love it <img alt="" src="http://localhost:1379/Content/js/fckeditor/editor/images/smiley/msn/teeth_smile.gif" /></p> Rules: - If the url contains "/Content/" I would like to get the relative path - If the url does not contain "/Content/", it is an external file, and the absolute path should remain Regex unfortunatley is not my forte, and this is too advanced for me at this point. If anyone can offer some tips I'd appreciate it. Thanks in advance.

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• How to leverage Spring Integration in a real-world JMS distributed architecture?

  - by ngeek

  For the following scenario I am looking for your advices and tips on best practices: In a distributed (mainly Java-based) system with: many (different) client applications (web-app, command-line tools, REST API) a central JMS message broker (currently in favor of using ActiveMQ) multiple stand-alone processing nodes (running on multiple remote machines, computing expensive operations of different types as specified by the JMS message payload) How would one best apply the JMS support provided by the Spring Integration framework to decouple the clients from the worker nodes? When reading through the reference documentation and some very first experiments it looks like the configuration of an JMS inbound adapter inherently require to use a subscriber, which in a decoupled scenario does not exist. Small side note: communication should happen via JMS text messages (using a JSON data structure for future extensibility).

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• How can I change text on a win32 window?

  - by Will

  Looking for hints, tips and search terms for changing the text on a win32 window from C#. More specifically, I'm trying to change the text on the print dialog from "Print" to "OK", as I am using the dialog to create a print ticket and not do any printing. How can I find the dialog's window handle? Once I've got it, how would I go about finding the button in the child windows of the form? Once I've found that, how would I change the text on the button? And how can I do all this before the dialog is shown? There's a similar question here, but it points to a CodeProject article that is waaay more complex than needed and is taking me a bit longer to parse through than I'd like to spend on this. TIA.

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• memory usage in C# (.NET) app is very high, until I call System.GC.Collect()

  - by Chris Gray

  I've written an app that spins a few threads each of which read several MB of memory. Each thread then connects to the Internet and uploads the data. this occurs thousands of times and each upload takes some time I'm seeing a situation where (verified with windbg/sos and !dumpheap) that the Byte[] are not getting collected automatically, causing 100/150MB of memory to be reported in task manager if I call System.GC.Collect() i'm seeing a huge drop in memory, a drop of over 100MB I dont like calling System.GC.Collect() and my PC has tons of free memory. however if anyone looks at TaskManager they're going to be concerned, thinking my app is leaking horribly. tips?

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• Pressing "Home" in Vim on an Indented Line

  - by Reid

  I have a bad habit of using the 'home' key to go back to the beginning of a line. As I recently started using vim (and loving it!) I noticed that when I press the home key on a lined that is indented, it returns me to the very beginning of the line. In Notepad++ (the editor I used to use) it would return me to the beginning of the code on that line, right after the indent. Is there some way to replicate this behavior in vim? Usually, when I'm pressing home it's in the Insert mode for me to (usually) stick a variable there. I have set smartindent in my vimrc, with set noautoindent as a "tips" page told me to make sure to disable autoindent (although it didn't seem to be enabled in the first place - perhaps that option is extraneous.) Thanks in advance.

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• Drupal, FUpload images module introduce bugs

  - by Patrick

  hi, I'm using FUpload module to upload multiple images together from my CCK Image field. It perfectly works, however if I use it when I'm creating a new node, the other CCK Image fields stop to work and the images (from these fields) are not stored at all. The error I get is "path doesn't exist"... It sounds like fUpload force the other CCK fields to store the content before the node is saved and the folders are created. (I'm using path auto, to create folders accordingly to node title). Could you give me some tips ? Thanks

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• Where to place java applet policy file?

  - by makdere

  Hi all, I am working on an artificial intelligence project which is a logic game and aims two user connecting to the server on the network who acts as an Admin and then start to play one by one. In order to create connections, i have a server code which is just listening on localhost:8000 and assigning team values to the clients as they arrive. After connecting, clients make their move under Admin's control. The question is that when i try to put my code to work in the browser it fails with the following error: java.security.AccessControlException: access denied (java.net.SocketPermission 127.0.0.1:8000 connect,resolve) Even though i have created my own policy, first granting only Socket access permission to the codebase of my project folder (file:///home/xxx/projects/-), after it didnt work i granted all permissions from all codebase. I tried placing my policy file both in the home directory and in the same directory where my applet code resides. Appreciate any tips, thanks.

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• WPF -- Where do you draw the line between code and XAML?

  - by John Franks

  I'm a long-time C#/.NET programmer but totally new to WPF and the System.Windows.Controls namespace and XAML. The more I learn about it the more I realize that you can do pretty much all of your GUI initialization and event handling glue in either XAML or in code (say C# code or VB.Net code). My question is to those who have been working on WPF for longer and ideally those who have shipped apps with it -- where did you find was the best place to 'draw the line' between XAML and code? Did you use XAML wherever you could? Only where interfacing with non-coding UI designers? Any tips in this area would be extremely helpful to myself and other coders who are just getting into WPF programming and are kind of paralyzed by all the choices we can make!

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• What libraries are available for manipulating super large images in .Net

  - by tpower

  I have some really large files for example 320 MB tif file with 14000 X 9000 pixels. The operations I need to perform are basically scaling the images to get smaller versions of it and breaking the image into tiles. My code works fine with small files and I use the .Net Bitmap objects but I will occasionally get Out of Memory exceptions for larger files. I've tried using the FreeImage libraries FreeImageBitmap but have the same problems. I'm using something like the following to scale the image: using (Graphics g = Graphics.FromImage((Image)result)) { g.DrawImage( source, xOffset, yOffset, source.Width * scale, source.Height * scale ); } Ideally I'd like a third party library to do all the hardwork, but if you have any tips or resources with more information I would appreciate it.

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• A Python IDE with Debugging and iPython Integration?

  - by skibum1981

  Does anyone know of a python IDE that has iPython as the interpreter? Using the standard interpreter just drives me nuts, as I've just grown to love using iPython and all the features it provides. To be honest, I'd rather code with a simple text editor + ipython than an IDE, but I love being able to set breakpoints with a click of a mouse, etc., so I'd like to combine both. Sorry if there's something out there and this is common knowledge. Any information/tips you can provide is GREATLY appreciated. Thanks!

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• Eclipse RCP : make a standalone plugin extending an existing standalone one

  - by akira2x3x

  I have extended via extension point (add menus and functionnalities) an already existing plugin which has it's own product definition file and it's own class Application implements IApplication. I want to create a Product Configuration(customize splash screen,etc...). Does my plugin need an Application class? I want my plugin to be independant, Standalone with a launcher. Not a fragment. Do I have to inherit already existing plugin Application? Thanks for the tips and tricks.

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• maya "export all" window blocks my plugins script UI

  - by Hinchy

  I'm writing a custom File Translator for Maya which can export only (I have only declared the writer function). Currently having a problem with the MEL script which defines the plugin's options as a GUI. Currently I have a blank Maya scene, go to "file-export all". This creates the "File Export All" dialog, I then select my plugin exporter which runs my MEL script to create the bespoke options window. This new window is created behind the "File Export All" dialog and is not selectable! Do I have to place my export plugin specific options within the export all dialog rather than placing them in a separate window? Thanks for any links, tips or pointers you can provide.

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• multidimensional vector rotation and angle computation -- how?

  - by macias

  Input: two multidimensional (for example dim=8) vectors a and b. I need to find out the "directed" angle (0-2*Pi, not 0-Pi) between those vectors a and b. And if they are not parallel I need to rotate vector b in plane a,b by "directed" angle L. If they are parallel, plane does not matter, but angle of rotation is still the same L. For 2d and 3d this is quite easy, but for more dimensions I am lost, I didn't find anything on google, and I prefer using some already proved&tested equations (avoiding errors introduced by my calculations :-D). Thank you in advance for tips, links, etc. Edit: dimension of the space is the same as dimension of the vectors.

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• How do I SEO these keywords?

  - by alex

  I am building a music album search engine. My questions are: How do I figure out which keywords people search the most? Do they search "music album" the most, or "album music" the most? What tool can I use to get this stats? Should I position my website to what people search the most? What about competitors? Please give me some tips on whether I should have the title "music album" or "album search" , depending on number of keyword searches.

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• Suggestions for VS+Resharper keyboard shortcuts on a Mac

  - by John Miller

  I just upgraded to a Macbook Pro as my development machine but still primarily develop .Net applications with Visual Studio and Resharper (via VMWare Fusion). By far, the biggest obstacle I'm running into is getting used to the keyboard layout change (ex. not being able to do ALT-Insert). Do any of you Windows-on-Mac veterans have any suggestions on how to ease the pain of transitioning (without moving to an external keyboard)? Are you changing mappings via VMWare's keyboard preferences? Or are you using something like AutoHotkey? Any other windows development tips for a Mac newb?

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• Create an own "OpenID-like system" Provider

  - by user502052

  I know that Facebook use their own OpenID-like system called "Facebook connect", which you can use to authenticate users on your site, among other features. In my case I have multiple Ruby on Rails applications: users.example.com profiles.example.com photos.example.com ... I would like to use 'users.example.com' as a web service that allows users to authenticate to all my other applications the same way as works "Facebook connect" or OpenID. In few words, 'users.example.com' must works as a "OpenID-like system" for my applications in 'example.com'. Can anyone give me tips and links to some useful resources? P.S.: since I am a newbie in this matter, I do not know if I'm saying things that make sense. So someone could help me to understand (if I am wrong) ...

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• jQuery compatible JavaScript documentation generator

  - by clyfe

  I need to choose a documentation generator (similar to jdoc in java or rdoc in ruby) for my javascript project that (built with jquery, underscore and backbone) Candidates: jsdoc toolkit pdoc natural docs docco YUI doc doctool http://jquery.bassistance.de/docTool/docTool.html other ? Requirements should work with jquery, underscore and backbone. that means object-literal methods etc I really like pdoc but its too centered around prototype, poorly documented, and I don't want to make extra files (sections?) to make it work (not sure about this) docco is nice but I want structured output (as in menu + class/func structure like jdoc) must be command line/makefile compatible (not web pastie) Tips, tricks, tutorials, success stories, advice greatly welcomed. Why Doesn't jQuery use JSDoc?

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• Custom http service responds fine to local IP address but NOT to localhost or 127.0.0.1

  - by Scrappydog

  I'm trying to connect to a custom http service written by another developer. The service responds fine on a local IP address and port number. Such as: http://10.1.1.1:1234 but it does NOT respond to http://localhost:1234 or http://127.0.0.1:1234 The service is a simple single function application written in VC++ that takes an http post string and returns another string. I'm trying to all it from C# using HttpWebRequest.GetResponse, but I can reproduce the same problem manually from a web browser... Test environment is Windows 2008 Server. Bottom line I'm looking for some troubleshooting tips to help the other developer fix his code.

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• Determining whether compiling on Windows or other system

  - by NumberFour

  Hi, Im currently developing a cross-platform C application. Is there any compiler macro which is defined only during compilation on Windows, so I can #ifdef some Windows specific #includes? Typical example is selecting between WinSock and Berkeley sockets headers: #ifdef _WINDOWS #include <winsock.h> #else #include <sys/socket.h> #include <netinet/in.h> #include <sys/un.h> #include <arpa/inet.h> #include <netdb.h> #endif So the thing Im looking for is something like that _WINDOWS macro. Thanks for any tips.

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• is Web Development moving too fast?

  - by Imran

  I find myself constantly learning new things in web development and there is always soo much to learn in general. Currently i work with PHP and have tried to keep up with Ruby on Rails(RoR) but it's moving so fast i'm not sure i can keep up with the latest changes. Does anyone else have trouble keeping up with so much innovation in web development or is it just me? And how do you guys cope with the never ending learning process especially with Rails? Just looking for tips Tricks and personal experiences really Thanks in advance;-)

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• Mapping words to numbers with respect to definition

  - by thornate

  As part of a larger project, I need to read in text and represent each word as a number. For example, if the program reads in "Every good boy deserves fruit", then I would get a table that converts 'every' to '1742', 'good' to '977513', etc. Now, obviously I can just use a hashing algorithm to get these numbers. However, it would be more useful if words with similar meanings had numerical values close to each other, so that 'good' becomes '6827' and 'great' becomes '6835', etc. As another option, instead of a simple integer representing each number, it would be even better to have a vector made up of multiple numbers, eg (lexical_category, tense, classification, specific_word) where lexical_category is noun/verb/adjective/etc, tense is future/past/present, classification defines a wide set of general topics and specific_word is much the same as described in the previous paragraph. Does any such an algorithm exist? If not, can you give me any tips on how to get started on developing one myself? I code in C++.

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• Arduino not able to send serial data back

  - by Casper Marcussen

  Hello everyone So i found out how to connect the arduino to my java program. But using the seriel connections dosent give any useful data back, its either in the wrong format, or just sends it as a box. I've looked at the related questions posted early in here, but none of the tips seems to help. So does anyone know how to send the data between an arduino and a computer using the serieal port? P.S I've used the sample code from the arduino.cc homepage to connect to the serial port.

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• What JS framework offers scroll functionality (+animation) in a div without a scrollbar?

  - by montooner

  All: I want to scroll through a sequence of tumblr/twitter posts as a long sequence of texts. Let's say we have: <div id="mainContent"> _some content_ </div> where the css for mainContent is: #mainContent { padding: 20px 20px; background: #FFF; height:500px; overflow:hidden; } I really like the functionality of Scrollable jQuery, but they require pagination and an array of elements. I'm looking for tips in any of these categories: a js framework I can use to achieve this a solution to paginating the text

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