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• Techniques for Visualizing Data

  - by Rob Wilkerson

  I'm looking into providing several methods of visualizing a large volume of data. This may include, but will not be limited to, simple graphing. The techniques I'm exploring will involve shapes, text and lines. It will also involve interaction with elements (hiding, focusing, etc.) and animation (shifting, dragging, systematic reorganizing, etc.) of those elements. SVG or Canvas seem like the obvious choices (in conjunction with a JS library--probably jQuery), but the lack of cross-browser availability is a concern. I'd prefer to avoid Flash/Flex, but right now it's the only rock solid, cross-browser technology I've found if support for IE7/8 is a requirement. Does anyone have any other suggestions or any additional information that would make a technology I've listed seem even more appealing? Thanks.

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• How to do a comet long pulling with ActionScript3?

  - by Victor Lin

  I want to load data from my web server, I want it be the AJAX/Comet way, my web-server long holds the request, response it until something happened. Thus, I wrote some as3 code like this: private function load(): void { var request:URLRequest = new URLRequest(url); var variables:URLVariables = new URLVariables(); variables.tick = this.tick; request.data = variables; urlLoader = new URLLoader(request); urlLoader.addEventListener(Event.COMPLETE, onComplete); urlLoader.addEventListener(IOErrorEvent.IO_ERROR , onIOError); log.info("Loading info from {0}", request.url); } It works, if the waiting time is short, but however, it failed with IOError 2032, seems the waiting time is out. Here is the problem, how can I do a long-polling with as3 and avoid the timeout error? Thanks.

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• dynamic behavior of factory class

  - by manu1001

  I have a factory class that serves out a bunch of properties. Now, the properties might come either from a database or from a properties file. This is what I've come up with. public class Factory { private static final INSTANCE = new Factory(source); private Factory(DbSource source) { // read from db, save properties } private Factory(FileSource source) { // read from file, save properties } // getInstance() and getProperties() here } What's a clean way of switching between these behaviors based on the environment. I want to avoid having to recompile the class each time.

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• ASP.NET OutPutCache VaryByParam and VaryByHeader with AJAX

  - by DennyDotNet

  I'm trying to do some caching using VaryByParam AND VaryByHeader. When an AJAX request comes in I return a partial XHTML. When a regular request comes in I send the partial XHTML page with header / footer. I tried to cache the page by doing: [OutputCache( Duration = 5, VaryByParam = "nickname,page", VaryByHeader = "X-Requested-With" )] However this doesn't work... if I do a regular request first then run the AJAX call I get the full cached page instead of the partial and vice-versa. Seems like VaryByHeader is being ignored. Is it because X-Requested-With is omitted on normal requests? Or perhaps it's doing VaryByParam OR VaryByHeader? My obvious way around this is for AJAX requests to call a different method which only returns partial pages, however I'd like to avoid that if possible. I'm using ASP.NET MVC 1.0 with the OutputCacheAttribute.

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• Best data-structure to use for two ended sorted list

  - by fmark

  I need a collection data-structure that can do the following: Be sorted Allow me to quickly pop values off the front and back of the list Remain sorted after I insert a new value Allow a user-specified comparison function, as I will be storing tuples and want to sort on a particular value Thread-safety is not required Optionally allow efficient haskey() lookups (I'm happy to maintain a separate hash-table for this though) My thoughts at this stage are that I need a priority queue and a hash table, although I don't know if I can quickly pop values off both ends of a priority queue. I'm interested in performance for a moderate number of items (I would estimate less than 200,000). Another possibility is simply maintaining an OrderedDictionary and doing an insertion sort it every-time I add more data to it. Furthermore, are there any particular implementations in Python. I would really like to avoid writing this code myself.

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• Filter user input (paragraph) for links + smileys

  - by Alec Smart

  Hello, I am looking at some sort of existing filter which can sanitize the user input to avoid XSS. Probably I can use htmlspecialchars for that. But at the same time I want to be able to parse all links (should match a.com, www.a.com and http://www.a.com and if it is http://www.aaaaaaaaaaaaaaaaaaaaaaaaaa.com then it should display it as aaa..a.com), e-mails and smileys. I am wondering what is the best way to go about it. I am currently using a php function with some regex, but many times the regex simply fails (because of link recognition is incorrect etc.). I want something very similar to the parser used during Google Chat (even a.com works). Thank you for your time.

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• I have a bunch of divs floated left, lined up in columns with different heights. They dont create a

  - by Roeland

  Hey guys, I am trying to create a grid like system with div's with content floated left. The problem is that the height of each div is not static since the content is different in each one. Since the height is different.. things get outta whack if one is taller then another in one row. Is there some sort of css way or js (prefer javascript) way to get around this. I really want to avoid setting large heights on the divs to get them to line up. You can see the example here: http://www.foreclosurejournalinc.com/index.php?option=com_hotproperty&view=type&id=1

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• Kohana Database Library - How to Execute a Query with the Same Parameters More Than Once?

  - by Noah Goodrich

  With the following bit of code: $builder = ORM::factory('branch')->where('institution_id', $this->institution->id)->orderby('name'); I need to first execute: $count = $builder->count_all(); Then I need to execute: $rs = $builder->find_all($limit, $offset); However, it appears that when I execute the first query the stored query parameters are cleared so that a fresh query can be executed. Is there a way to avoid having the parameters cleared or at least copy them easily without having to reach directly into the Database driver object that stores the query parameters and copy them out? We are using Kohana 2.3.4 and upgrading is not an option.

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• htaccess/htpasswd in hierarchical folder structure

  - by chessweb

  I have a folder (folder_1) that is protected by htaccess/htpasswd files. Inside that folder is another folder (folder_2) that is protected by another couple of htaccess/htpasswd files. When a php-script in folder_1 or folder_2 is called, the user has to authenticate herself using the correct username and password as specified in the respective htaccess/htpasswd files. This works as intended. However, as soon as the php-script in folder_2 tries to refer to another script or a css-file that is located in folder_1, the user must enter username and password for folder_1 as well. Is there a way to avoid this that does not involve copying scripts and css-files from folder_1 to folder_2? Regards, Ralf

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• Node.js for lua?

  - by Shahbaz

  I've been playing around with node.js (nodejs) for the past few day and it is fantastic. As far as I can tell, lua doesn't have a similar integration of libev and libio which let's one avoid almost any blocking calls and interact with the network and the filesystem in an asynchronous manner. I'm slowly porting my java implementation to nodejs, but I'm shocked that luajit is much faster than v8 JavaScript AND uses far less memory! I imagine writing my server in such an environment (very fast and responsive, very low memory usage, very expressive) will improve my project immensly. Being new to lua, I'm just not sure if such a thing exists. I'll appreciate any pointers. Thanks

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• Bulding an multi-platform SWT application using Ant

  - by Mridang Agarwalla

  I'm writing an SWT application which can be used on Windows (32/64 bit) and Mac OSX (32/64 bit). Apart from the JRE I rely on the SWT library found here. I can find four versions of the SWT library depending upon my target platforms (as mentioned above). When building my application, how can I compile using the correct SWT Jar? If possible, I'd like to try and avoid hard-coding the Jar version, platform and architecture. The SWT Jars are named like this: swt-win32-x86_64.jar swt-win32-x86_32.jar swt-macosx-x86_32.jar swt-macosx-x86_64.jar (My project will be an open source project. I'd like people to be able to download the source and build it and therefore I've thought of including all the four versions of the SWT Jars in the source distribution. I hope this is the correct approach of publishing code relying on third-part libraries.) Thanks everyone.

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• rails: date type and GetDate

  - by cbrulak

  This is a follow up to this question: http://stackoverflow.com/questions/2930256/unique-responses-rails-gem I'm going to create an index based on the user id, url and a date type. I want date type (not datetime type) because I want the day, the 24 hour day to be part of the index to avoid duplication of page views counts on the same day. In other words: A view only counts once in a day by a visitor. I also want the default value of that column (viewdate) to be the function GETDATE(). This is what I have in my migration: execute "ALTER TABLEpage_viewsADD COLUMN viewdate datetime DEFAULTGETDATE()`" But the value viewdate is always empty. What am I missing? (as an aside, any other suggestions for accomplishing this goal?)

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• What is the compatibility on .NET 4.0?

  - by Juan Manuel Formoso

  We have several .NET applications developed in .NET 3.5 (Windows services, web applications, and WCF services) in different servers. I'd like to migrate to .NET 4.0 and use VS.NET 2010. Does VS.NET 2010 compiles to .NET 3.5 to avoid full simultaneous migration, being able to stop using VS.NET 2008 but maintaining some applications in the previous version? Can I uninstall the .NET < 4.0 runtime and have only .NET 4.0 in my servers? Does it run applications compiled to previous framework versions?

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• PHP is there a true() function?

  - by Gremo

  I'm writing a function to check all elements inside an array, returning a single boolean value. is there a true() function? function all($f, array $arr) { return empty($arr) ? false : array_reduce($arr, function($v1, $v2) use ($f) { return $f($v1) && $f($v2); }, true); } $test = array(1, 6, 2); $gte0 = function($v) { return $v >= 0; } var_dump(all($gte0, $test)); // True $test = array(true, true, false); $id = function($v) { return $v; } // <-- this is what i would avoid var_dump(all($id, $test)); // False all(true, $test); // NOT WORKING because true is not a function

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• How to make msbuild ItemGroup items be separated with a space rather than semi-colon?

  - by mark

  Dear ladies and sirs. Observe the following piece of an msbuild script: <ItemGroup> <R Include="-Microsoft.Design#CA1000" /> <R Include="-Microsoft.Design#CA1002" /> </ItemGroup> I want to convert it to /ruleid:-Microsoft.Design#CA1000 /ruleid:-Microsoft.Design#CA1002 Now, the best I came up with is @(R -> '/ruleid:%(Identity)'), but this only yields /ruleid:-Microsoft.Design#CA1000;/ruleid:-Microsoft.Design#CA1002 Note the semi-colon separating the two rules, instead of a space. This is bad, it is not recognized by the fxcop - I need a space there. Now, this is a simple example, so I could just declare something like this: <PropertyGroup> <R>/ruleid:-Microsoft.Design#CA1000 /ruleid:-Microsoft.Design#CA1002</R </PropertyGroup> But, I do not like this, because in reality I have many rules I wish to disable and listing all of them like this is something I wish to avoid.

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• What's the easiest way to use OAuth with ActiveResource?

  - by Barry Hess

  I'm working with some old code and using ActiveResource for a very basic Twitter integration. I'd like to touch the app code as little as possible and just bring OAuth in while still using ActiveResource. Unfortunately I'm finding no easy way to do this. I did run into the oauth-active-resource gem, but it's not exactly documented and it appears to be designed for creating full-on API wrapper libraries. As you can imagine, I'd like to avoid creating a whole Twitter ActiveResource API wrapper for this one legacy change. Any success stories out there? In my instance, it might be quicker to just leave ActiveResource rather than get this working. I'm happy to be proven wrong!

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• A* pathfinder obstacle collision problem

  - by Cheesebaron

  I am working on a project with a robot that has to find its way to an object and avoid some obstacles when going to that object it has to pick up. The problem lies in that the robot and the object the robot needs to pick up are both one pixel wide in the pathfinder. In reality they are a lot bigger. Often the A* pathfinder chooses to place the route along the edges of the obstacles, sometimes making it collide with them, which we do not wish to have to do. I have tried to add some more non-walkable fields to the obstacles, but it does not always work out very well. It still collides with the obstacles, also adding too many points where it is not allowed to walk, results in that there is no path it can run on. Do you have any suggestions on what to do about this problem?

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• drupal bootstrap script: how to get list of all nodes of type x?

  - by groovehunter

  hi. I create a custom import and export, at the moment as an external script (via bootstrap), i plan to create a module in a more generic fashion lateron. I am building a frontend for nagios and for our host management and nagios configuration btw. Maybe it might become useful for other environments (networkmanagement) Now i need to know how to get list of all nodes of type x? I want to avoid direct SQL. A suggestion i got was to make an rss and parse it but i acess the drupal db a dozen times to extract various nodes, so it feels strange to do a web request for one thing So what i am looking for as newbie drupal dev is just a pointer to basic search module api for this task TIA florian

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• Redirect in combination with a rewrite condition in htaccess

  - by Robbert van den Bogerd

  Hi all! I've got a cms-driven website, with no option to change the code. What I want to accomplish is creating friendly url's, using only apaches mod-rewrite engine. The problem is I'm creating an infinite loop, because I first redirect the original url (index.php?id=21) to a friendly one (/friendly/) and then rewrite the '/friendly' part back to 'id=21' I know there should be an extra condition or parameter to avoid looping in this case, but I can´t get one of the possible solutions to work. Here´s the code: RewriteCond %{query_string} ^id=21$ [NC] RewriteRule /* /peuterspeelzaal? [R=301,L] RewriteRule ^peuterspeelzaal$ index.php?id=21 [L]

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• How can I create an .xls file with a readwrite password from Delphi

  - by dummzeuch

  I know that it is possible to create .xls files from Delphi using ADO, OLE automation with Excel and even using several commercial libraries. My requirement now is not just creating a new .xls file and adding data to it but in addition protecting it with a password against editing. I guess this would be possible using OLE automation but that would require an Excel installation on the computer and also add all the potential hassle of OLE automation which I would like to avoid. Does any of the other solutions provide the option of password protecting the file? (Yes, I know this is far from secure, but the customer requests it. Just in case it matters: I am using Delphi 2007.)

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• Source code annotation tool

  - by RoToRa

  I'm looking for a tool with which I can annotate source code. I have some 3rd party source code (JavaScript) I need to understand and I don't want to change it (add inline comments) so that line numbers can stay intact (for communication with others), I can avoid accidentally changing something and my annotations stand out compared to the authors comments. Normally I would print the whole thing out an scribble on it, but the code is too long for that and I need to share it per email. I would be great if one could do some like that including being able to create "links" between so places in the code, possibly even visually with a lines or arrows.

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• Longlasting Macport installation

  - by Werner

  Hi, I use Macports on Mac OSX to install some software. But there are somethings that I find very strange. For instance, yesterday I installed some app. and the it needed to get gcc43 and compile completely from source! It took a lot of time, although now everything works right. I understand that compilation of everything in the gentoo spirit is eomthing nice, but in the Mac case, not necessary. There are ony sole hardware variations, so it will be easier to get the binaries. I wonder if Macporst can be forced to get the binaries when available and therefore avoid these time consuming compilations. Thanks

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• Redoundant code in exception handling

  - by Nicola Leoni

  Hi, I've a recurrent problem, I don't find an elegant solution to avoid the resource cleaning code duplication: resource allocation: try { f() } catch (...) { resource cleaning code; throw; } resource cleaning code; return rc; So, I know I can do a temporary class with cleaning up destructor, but I don't really like it because it breaks the code flow and I need to give the class the reference to the all stack vars to cleanup, the same problem with a function, and I don't figure out how does not exists an elegant solution to this recurring problem.

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• Processing CSV File

  - by nettguy

  I am using Sebastien LorionReference CSV reader to process my CSV file in C# 3.0. Say example id|name|dob (Header) 1|sss|19700101 (data) 2|xx|19700201 (data) My Business Object is class Employee { public string ID {get;set;} public string Name {get;set;} public string Dob {get;set;} } I read the CSV stream and stored it in List<string[]> List<string[]> col = new List<string[]>(); using (CsvReader csv = new CsvReader (new StreamReader("D:\\sample.txt"), true, '|')) { col = csv.ToList(); } How to iterate over the list to get each Employee like foreach (var q in col) { foreach (var r in q) { Employee emp=new Employee(); emp.ID =r[0]; emp.Name=r[1]; emp.Dob=r[2]; } } If i call r[0],r[1],r[2] i am getting "index out of range exception".How the process the list to avoid the error?

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• Debug in Eclipse - ClassNotFoundException

  - by lmsasu

  Hi all, when i debug in Eclipse a simple console application, I get a lot of ClassNotFoundException lines in the debug Window. It is not an error, somewhat lower in another pane I get "Source not found.". I understand that it is because the source code of the required class is not available, buI would like to skip over these lines... I have to press a lot of times the "step over" or "step out" button to get out of these states. What can I do in order to avoid these useless lines at all? Thanks

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