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• How can I bind a winforms Opacity to a TrackBar (slider)

  - by Allen

  I've got a winform with a BindingSource that has an int property named Opacity in its DataSource. I also have a TrackBar on the winform that I want to use to control the Opacity of the winform. I've bound the Value property on the TrackBar to the Opacity and that functions just fine, sliding the TrackBar will change the variable from TrackBar.Minimum (0) to TrackBar.Maximum (1). I've also bound the Opacity property of the winform to this value, however, since the TrackBar's values only go from Minimum to Maximum in +/-1 rather than +/- .1 or so (like Opacity does), it doesn't properly fade the winform. Instead, 0 will turn it opaque and 1 will turn it fully visible. I need a way to work within the architecture described above, but get the TrackBar to change its value from 0 to 1 in defined increments smaller than 1.

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• AJAX call in for loop won't return values to correct array positions

  - by Heilemann

  I need to get a range of pages using AJAX and put them into an array, where their given place in the array is equal to the i of a for loop (it's a caching-like function for blog pages, and the range of the for loop is entirely variable). I'm doing something akin to the following: var bongo = new Array(); for (i = 0; i < 10; i++) { jQuery.ajax({ type: "GET", url: http://localhost, data: queryString, success: function(request) { bongo[i] = request } }) } The problem is, that unless I add async: false to the .ajax options (which would make it... SJAX?), which causes the requests to basically pause the browser, going against what I'm trying to do, the i in the success callback will always end up being 11, whereas I of course want it to pour the returned data into each slot of the array from 0 to 10. I've tried replacing the line with this: bongo[i] = jQuery.ajax({ type: "GET", url: http://localhost, data: queryString }).responseText But that made no difference.

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• How do I make a shortcut for a Perl program under Windows using a DOS batch file?

  - by Micah

  I'm trying to "hide" some of my perl program from the end user to make things easier on them. I'm doing what I can to keep them out of the command prompt. The program itself has a GUI designed in Perl/Tk, so they don't have to worry about the command prompt. Could I write out a quick batch file that goes along the lines of: START perl 'C:\[some path here]\myscript.pl' with START to start a program, the perl interpretor as my program, and the path/name of my perl script as the parameter? Would I have to specify where to find perl or would Windows just know because perl is in the computer's PATH variable? Thanks for the help!

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• How to Force a Method Call on a Property or Method of an Object in PHP?

  - by Noah Goodrich

  In my View (using Zend_View so the the view is an object), I make calls to object properties and methods to populate the template like so: <?= $this->user->name ?> // Outputs John Doe <br/> <?= $this->user->getCompany()->name ?> // Outputs Acme <br/> <?= $this->method() ?> // Outputs foobar If I make it so that all property requests (like for 'user') go through __get() is there any way that I can catch the subsequent calls so that I can force a method call on the final outputted value? For example so that I could do automatic escaping of output. As I see it right now, I either have to escape the input as it goes into the database or use compiled templates like Smarty does, or switch to assigning every variable to the View object so that it has direct control to force escaping before outputting the data.

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• Connect to SVN repository with Netbeans using SVN+SSH

  - by shuby_rocks

  Hello all, I am trying to connect to a SVN server in order to import my project into it with svn+ssh authentication method. I am using the NetBeans IDE (6.8) with subversion plugin installed on Windows XP SP2. I have plink installed with its path set in the Windows PATH env variable. When I use the similar looking repository URL (XXXX and YYYY replaced with sensible things) svn+ssh://XXXX@YYYY/home/dce/svn/trunk along with this external tunnel command plink -l <myUserName> -i C:\\privateKey.ppk I keep getting this error: org.tigris.subversion.javahl.ClientException: Network connection closed unexpectedly I searched about it on the Internet and tried many things but didn't work out. Please help if anybody has some idea what may be going wrong. Thanks a lot in advance.

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• Why does Visual Studio 2008 change namespace characters in a generated file?

  - by Fredrik

  Hello, I am working on a asp.net 3.5 project in sweden, where some of the namespaces include swedish characters, such as 'å', 'ä' and 'ö'. When building the project and generating the design-file, visual studio replaces these characters with some other strange characters. This only happens when the characters occur in a namespace or class name. If a field or variable contain a swedish character, everything works fine. To clarify, the strange character occur in the design file when a namespace and/or control contain swedish characters. Does anyone know why this happens and if there is a solution for the problem that doesn't mean changing the names of the namespaces? Sincerely, Fredrik

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• Using a priority queue in Java

  - by Bharat

  Forgive me if this is a tried question, but I'm having a little difficulty figuring it out. I currently have a class Node, and each 'node' is a square in a maze. I'm trying to implement the A* algorithm, so each of these nodes will have an f-cost (int) data member inside of it. I was wondering if there's a way that I can create a priority queue of these nodes, and set up the f-cost variable as the comparator? I've looked at examples online, but all I can find are String priority queues. Can I implement Comparator for the Node class? Would this allow me to access the data member stored inside it? Many Thanks!

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• PHP Explode and Get_Url: Not Showing up the URL

  - by elmaso

  hello! its a little bit hard to understand. in the header.php i have this code: <? $ID = $link; $url = downloadLink($ID); ?> I get the ID with this Variable $link -- 12345678 and with $url i get the full link from the functions.php in the functions.php i have this snippet function downloadlink ($d_id) { $res = @get_url ('' . 'http://www.example.com/' . $d_id . '/go.html'); $re = explode ('<iframe', $res); $re = explode ('src="', $re[1]); $re = explode ('"', $re[1]); $url = $re[0]; return $url; } and normally it prints the url out.. but, i cant understand the code..

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• EJB3 Business Delegates

  - by mykola

  Is there any reason for making delegate when using EJB3? Because the only real benefit i see from delegate is that it allows to hide lookup and access details of EJB architecture. Well it also provides some decoupling but it's mostly unused, imho. With EJB3 we have injection so now i can just create a variable with @EJB annotation and use it as is. Do i still need delegates? Is this injection resource consuming? I mean if i use it in JSF's request managed beans may be it's still better to use delegates just to lessen these injection calls? Thank you!

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• How can I properly use environment variables encoded as Windows-1251 in Perl?

  - by Kartlee

  I have an environment variable set in Windows as TEST=abc£ which uses Windows-1252 code page. Now, when I run a Perl program test.pl this environment value comes properly. When I call another Perl code - test2.pl from test1.pl either by system(..) or Win32::Process, the environment comes garbled. Can someone provide information why this could be and way to resolve it? The version of perl I am using is 5.8. If my understanding is right, perl internally uses utf-8, so the initial process - test1.pl received it right from Windows-1252 → utf-8. When we call another process, should we convert back to Windows-1252 code page?

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• Making a shortcut for a Perl program under Windows using a DOS batch file.

  - by Micah

  I'm trying to "hide" some of my perl program from the end user to make things easier on them. I'm doing what I can to keep them out of the command prompt. The program itself has a GUI designed in Perl/Tk, so they don't have to worry about the command prompt. Could I write out a quick batch file that goes along the lines of: START perl 'C:\[some path here]\myscript.pl' with START to start a program, the perl interpretor as my program, and the path/name of my perl script as the parameter? Would I have to specify where to find perl or would Windows just know because perl is in the computer's PATH variable? Thanks for the help!

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• Ajax cache control

  - by Brian

  Hello, I am having a problem with ajax requests in Internet Explorer and in Chrome - I cannot bust the cache. Normal pages don't have the problem - it's just the ajax requests. I know that one workaround is to append a random query string variable to the end of the URL. However, I don't want to lose all the benefits of caching, I just want the browser to pick up the new file if the version on the server is different from the cached version. I have tried manually setting the ajax POST header, to no avail: xmlHttp.setRequestHeader("Cache-Control", "must-revalidate"); Adding this to my .htaccess file doesn't work either: <FilesMatch "\.(js|css).*" Header set Cache-Control: "max-age=172800, public, must-revalidate" </FilesMatch Any help would be greatly appreciated. Thanks, Brian

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• Java-Swing: Change getSource() in ActionListener

  - by Brandon

  I have a class that contains a JButton. This can't be changed. The problem is this: The actionListener calls getSource() and gets the JButton, not the container class. Can I change what getSource retrieves, before the actionListener is added? OR can JButtons have a variable reference to its container? I can't make a class extend a JButton. It caused bugs for drawing purposes... story of my week.

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• using WP_Query with custom SQL in wordpress

  - by Matt Facer

  Hi. I am writing a plugin for wordpress and I want to create my own search. I have tried to alter the wordpress search, but what I am doing is very specific with the SQL query. I am comparing lat and long coordinates and getting posts based on that. I can display posts by using the standard wpdb query, but then I don't get the other features like paging. I'd like to be able to use my SQL statement with the WP_Query function. If I'm right in thinking, I should then be able to use the paging and other features which come from the $posts global variable. Is this right?? I've googled for hours but can't find anything for plugins outside of using args to select categories etc. I simply need to send a complete SQL command - nothing else. Many thanks....

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• Layout components Horizontally in Android

  - by xximjasonxx

  Greetings all, I am trying to create a layout in Android for a notification. My goal is to have the following displayed: 1: Icon for the app 2: Vertically stacked LinearLayout with Session title and Room to be held in 3: The start time of the session The problem I am facing is that #2 has a variable width depending on the size of the title. Hardcoding a width would look terrible if the user turns the handset sideways and goes into Landscape mode. Therefore here is my question: How can I layout three components horizontally in Android such that #1 and #3 are left and right aligned respectively, and #2 simply takes the space remaining? Thanks in advance

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• Haskell: Left-biased/short-circuiting function

  - by user2967411

  Two classes ago, our professor presented to us a Parser module. Here is the code: module Parser (Parser,parser,runParser,satisfy,char,string,many,many1,(+++)) where import Data.Char import Control.Monad import Control.Monad.State type Parser = StateT String [] runParser :: Parser a -> String -> [(a,String)] runParser = runStateT parser :: (String -> [(a,String)]) -> Parser a parser = StateT satisfy :: (Char -> Bool) -> Parser Char satisfy f = parser $ \s -> case s of [] -> [] a:as -> [(a,as) | f a] char :: Char -> Parser Char char = satisfy . (==) alpha,digit :: Parser Char alpha = satisfy isAlpha digit = satisfy isDigit string :: String -> Parser String string = mapM char infixr 5 +++ (+++) :: Parser a -> Parser a -> Parser a (+++) = mplus many, many1 :: Parser a -> Parser [a] many p = return [] +++ many1 p many1 p = liftM2 (:) p (many p) Today he gave us an assignment to introduce "a left-biased, or short-circuiting version of (+++)", called (<++). His hint was for us to consider the original implementation of (+++). When he first introduced +++ to us, this was the code he wrote, which I am going to call the original implementation: infixr 5 +++ (+++) :: Parser a -> Parser a -> Parser a p +++ q = Parser $ \s -> runParser p s ++ runParser q s I have been having tons of trouble since we were introduced to parsing and so it continues. I have tried/am considering two approaches. 1) Use the "original" implementation, as in p +++ q = Parser $ \s - runParser p s ++ runParser q s 2) Use the final implementation, as in (+++) = mplus Here are my questions: 1) The module will not compile if I use the original implementation. The error: Not in scope: data constructor 'Parser'. It compiles fine using (+++) = mplus. What is wrong with using the original implementation that is avoided by using the final implementation? 2) How do I check if the first Parser returns anything? Is something like (not (isNothing (Parser $ \s - runParser p s) on the right track? It seems like it should be easy but I have no idea. 3) Once I figure out how to check if the first Parser returns anything, if I am to base my code on the final implementation, would it be as easy as this?: -- if p returns something then p <++ q = mplus (Parser $ \s -> runParser p s) mzero -- else (<++) = mplus Best, Jeff

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• PHP: why is this null different from the other null

  - by matthy

  hi i tried 2 things what should be the same however it my testing says different does anyone know why the only thing i do is put it in a variable... if ($_SESSION[$something] === null) echo("this is null"); $_SESSION[$something] does not exists so it indeed says: "this is null". now look at this $theSession = $_SESSION[$something]; if (theSession === null) echo("this is null"); now it does not say "this is null" while it should be exactly the same right?

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• Kohana and Javscript path

  - by Leonti

  Hi! I have a following Kohana setup: All my files are placed under 'public_html/koh' My js files are placed under 'public_html/koh/media/js/' I use html::script helper to include those javascript files which generates me following html code: In my js I access one of controllers like 'json/getsomething' (which is http://localhost/koh/json/getsomething). It works OK as long as I'm staying in top of the controller: http://localhost/koh/home When I go to 'http://localhost/koh/home/index' it renders the same page of course but 'json/getsomething' is not accessible from Javascript anymore. How can I solve this problem? Include Javascript using absolute path? Create a variable in js like var fullPath = 'http://localhost/koh/'? What is the best practice to do it? Leonti

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• How do I set scons system include path

  - by Michael Anderson

  Using scons I can easily set my include paths: env.Append( CPPPATH=['foo'] ) This passes the flag -Ifoo to gcc However I'm trying to compile with a lot of warnings enabled. In particular with env.Append( CPPFLAGS=['-Werror', '-Wall', '-Wextra'] ) which dies horribly on certain boost includes ... I can fix this by adding the boost includes to the system include path rather than the include path as gcc treats system includes differently. So what I need to get passed to gcc instead of -Ifoo is -isystem foo I guess I could do this with the CPPFLAGS variable, but was wondering if there was a better solution built into scons.

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• Convert input to integer before save in rails

  - by Micke

  Hello, i have a set of select inputs representing a users birthday: birthyear, birthmonth and birthday. And i want to validate birthyear like this: validates_inclusion_of :birthyear, :in => Date.today.year-50..Date.today.year-12 So the user can be at least 12 years but at most 50 years when they are registering. But my problem is that the variable from the input is a string and not an integer. So how can i convert the input to an integer? or is there any easier way to check the users age? Thanks, Micke

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• NAnt build issues with Mono

  - by calmcajun

  I am trying to build a Mono project using NAnt but I get the error listed below. I have tried altering the environment variable PKG_CONFIG_PATH to include the path leading to the file: mono.pc but that does not seem to work. Failed to initialize the 'Mono 3.5 Profile' (mono-3.5) target framework.: NAnt.Core.BuildException: Failed to initialize the 'Mono 3.5 Profile' (mono-3.5) target framework. ---> Unable to locate 'mono' module using pkg-config. Download the Mono development packages from http://www.mono-project.com/downloads/.: NAnt.Core.BuildException: Unable to locate 'mono' module using pkg-config. Download the Mono development packages from http://www.mono-project.com/downloads/. at NAnt.Core.Tasks.FailTask.ExecuteTask () [0x00000] in <filename unknown>:0 at NAnt.Core.Task.Execute () [0x00000] in <filename unknown>:0 --- End of inner exception stack trace --- at NAnt.Core.FrameworkInfo.Init () [0x00000] in <filename unknown>:0 at NAnt.Core.FrameworkInfo.Validate () [0x00000] in <filename unknown>:0 at NAnt.Core.ProjectSettingsLoader.ConfigureRuntimeFramework () [0x00000] in <filename unknown>:0

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• A PHP design pattern for the model part [PHP Zend Framework]

  - by Matthieu

  I have a PHP MVC application using Zend Framework. As presented in the quickstart, I use 3 layers for the model part : Model (business logic) Data mapper Table data gateway (or data access object, i.e. one class per SQL table) The model is UML designed and totally independent of the DB. My problem is : I can't have multiple instances of the same "instance/record". For example : if I get, for example, the user "Chuck Norris" with id=5, this will create a new model instance wich members will be filled by the data mapper (the data mapper query the table data gateway that query the DB). Then, if I change the name to "Duck Norras", don't save it in DB right away, and re-load the same user in another variable, I have "synchronisation" problems... (different instances for the same "record") Right now, I use the Multiton pattern : like Singleton, but multiple instances indexed by a key (wich is the user ID in our example). But this is complicating my developpement a lot, and my testings too. How to do it right ?

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• C# or C++ game: many 16 color images loaded into RAM. Efficient solution?

  - by user560639

  I am in the planning stages of creating a fighting game and am unsure how to handle one issue relating to memory. Background info: - Still debating whether to use C# (XNA) or C++. We do not want to commit to either until we have explored how to solve this problem in both languages. - Using a max of 256MB RAM would be great if possible. - Two characters will be present at a time, and these characters can only change between battles. There is time to load/free memory between battles, but the game needs to run at a constant 60 drawn frames per second during combat. Each frame is 16.67ms - The total number of images per character is in the low hundreds. Each image is roughly 200x400 pixels. Only one image from each character will be displayed at any given moment. Uncompressed, each image takes roughly 300kb from my calculations; upwards of 100MB for a whole character. This is pushing too close to the 256MB limit given that memory will be needed for some other resources as well. Since each image can be made with a total of 16 colors. Theoretically I should be able to use 1/8th the space if I can take advantage of this. I've looked around but haven't found any word of native support for paletted images. (Storing each pixel using fewer bits that each map to a 32-bit RGBa color) I was considering making my own file format with 4 bits per pixel (and some extra palette info), loading all the images of this new format into RAM before battle, and then when drawing any specific image, decompress only that image into a raw image so it can be rendered properly. I don't know if it's realistic to perform so many assignment operations (appx 200x400 for each character = 160k) each frame. It sounds very hacky to me. Does anyone have advice on whether my solution sounds reasonable, and if there is perhaps a better one available? Thanks so much! (I also attempted to use an image with only 1 channel, then use a shader to perform a series of if statements to translate various values into other colors. Unfortunately, there were too many lines of code for the shader. It is also rather hacky and does not scale well.)

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• python networkx

  - by krisdigitx

  hi, i am trying to use networkx with python, when i run this program, it get this error, is there anything missing? #!/usr/bin/env python import networkx as nx import matplotlib import matplotlib.pyplot import matplotlib.pyplot as plt G=nx.Graph() G.add_node(1) G.add_nodes_from([2,3,4,5,6,7,8,9,10]) #nx.draw_graphviz(G) #nx_write_dot(G, 'node.png') nx.draw(G) plt.savefig("/var/www/node.png") Traceback (most recent call last): File "graph.py", line 13, in <module> nx.draw(G) File "/usr/lib/pymodules/python2.5/networkx/drawing/nx_pylab.py", line 124, in draw cf=pylab.gcf() File "/usr/lib/pymodules/python2.5/matplotlib/pyplot.py", line 276, in gcf return figure() File "/usr/lib/pymodules/python2.5/matplotlib/pyplot.py", line 254, in figure **kwargs) File "/usr/lib/pymodules/python2.5/matplotlib/backends/backend_tkagg.py", line 90, in new_figure_manager window = Tk.Tk() File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 1650, in __init__ self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use) _tkinter.TclError: no display name and no $DISPLAY environment variable

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• Add functions in gdb at runtime

  - by Michael Anderson

  I'm trying to debug some STL based C++ code in gdb. The code has something like int myfunc() { std::map<int,int> m; ... } Now in gdb, inside myfunc using "print m" gives something very ugly. What I've seen recommended is compiling something like void printmap( std::map<int,int> m ) { for( std::map<int,int>::iterator it = ... ) { printf("%d : %d", it->first, it->second ); } } Then in gdb doing (gdb) call printmap( m ) This seems like a good way to handle the issue... but can I put printmap into a seperate object file (or even dynamic library) that I then load into gdb at runtime rather than compiling it into my binary - as recompiling the binary every time I want to look at another STL variable is not fun .. while compiling and loading a single .o file for the print routine may be acceptable.

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