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Articles indexed in April 2010

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  • iPhone Development - Compiler Warning!

    - by Mustafa
    Sometimes when i try to "build"/compile a downloaded source, i get following warning: ld: warning: directory '/Volumes/Skiiing2/CD/ViewBased/Unknown Path/System/Library/Frameworks' following -F not found Has anyone else seen this issue?

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  • Stop a stopwatch

    - by James Morgan
    I have the following code in a JPanel class which is added to a another class (JFrame). What I'm trying to implement is some sort of a stopwatch program. startBtn.addActionListener(new startListener()); class startListener implements ActionListener { public void actionPerformed(ActionEvent e) { Timer time = new Timer(); time.scheduleAtFixedRate(new Stopwatch(), 1000, 1000); } } This is another class which basically the task. public class Stopwatch extends TimerTask { private final double start = System.currentTimeMillis(); public void run() { double curr = System.currentTimeMillis(); System.out.println((curr - start) / 1000); } } The timer works fine and this is definitely far from complete but I'm not sure how to code the stop button which should stop the timer. Any advice on this? BTW I'm using java.util.timer

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  • image/jpeg returned by groovy/grails is OK on development system, but corrupt on prod system. What c

    - by ?????
    I have a groovy/grails application that needs to serve images It works fine on my dev box, the image is returned properly. Here's the start of the returned JPEG, as seen by od -cx 0000000 377 330 377 340 \0 020 J F I F \0 001 001 001 001 , d8ff e0ff 1000 464a 4649 0100 0101 2c01 but on the production box, there's some garbage in front, and the d8ff e0ff before the 1000 is missing 0000000 ? ** ** ? ** ** ? ** ** ? ** ** \0 020 J F bfef efbd bdbf bfef efbd bdbf 1000 464a 0000020 I F \0 001 001 001 \0 H \0 H \0 \0 ? ** ** ? 4649 0100 0101 4800 4800 0000 bfef efbd It's the exact same code. I just moved the .war over and run it on a different machine. (Isn't Java supposed to be write once, run everywhere?) Any ideas? An "encoding" problem? The code is sent to the response like this: response.contentType = "image/jpeg"; response.outputStream << out;

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  • Problem with the nonresponding threads

    - by Oxygen
    Hello there, I have a web application which runs multiple threads on button click each thread making IO call on different ipAddresses ie(login windows account and then making file operations). There is a treshold value of 30 seconds. I assume that while login attempt if the treshold is exceeded, device on ipAddress does not match my conditions thus I dont care it. Thread.Abort() does not fit my situation where it waits for the IO call to finish which might take long time. I tried doing the db operations acording to states of the threads right after the treshold timeout. It worked fine but when I checked out the log file, I noticed that the thread.IsAlive property of the nonresponding threads were still true. After several debuggings on my local pc, I encountered a possible deadlock situation (which i suspect) that my pc crashed badly. In short, do you have any idea about killing (forcefully) nonresponding threads (waiting for the IO opreation) right after the execution of the button_click? (PS: I am not using the threadpool) Oguzhan

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  • UI_USER_INTERFACE_IDIOM() does not work with iPhone OS SDK < 3.2

    - by drootang
    Apple advises using the following code to detect whether running on an iPad or iPhone/iPod Touch: if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { // The device is an iPad running iPhone 3.2 or later. // [for example, load appropriate iPad nib file] } else { // The device is an iPhone or iPod touch. // [for example, load appropriate iPhone nib file] } The problem is that UI_USER_INTERFACE_IDIOM() and UIUserInterfaceIdiomPad are NOT defined in the SDKs priory to 3.2. This seems to completely defeat the purpose of such a function. They can only be compiled and run on iPhone OS 3.2 (iPhone OS 3.2 can only be run on iPad). So if you can use UI_USER_INTERFACE_IDIOM(), the result will always be to indicate an iPad. If you include this code and target OS 3.1.3 (the most recent iPhone/iPod Touch OS) in order to test your iPhone-bound universal app code, you will get compiler errors since the symbols are not defined in 3.1.3 or earlier. If this is the recommended-by-Apple approach to runtime device-detection, what am I doing wrong? Has anyone succeeded using this approach to device-detection?

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  • When is Visual Studio 2010 expected to RTM?

    - by Chris Pietschmann
    Microsoft originally slated the final release build for April 12, 2010. Somasegar said the Visual Studio 2010 and .NET Framework 4 releases will now be pushed back "a few weeks." I know the version / product name says "2010", but that doesn't necessarily mean that it will RTM in 2010. After all VS'2008 RTM'd in November 2007. The last Beta of VS'2008 came out in July 2007, and it RTM'd in November. So based on the previous version that places VS'2010 to RTM in September 2010 at the very earliest since the first Beta just came out in May. Anyone have any other speculations?

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  • Should I learn C?

    - by Justin Standard
    Original Question: Should I Learn C? In the theme of the stackoverflow podcast, here's a fun question: should I learn C? I expect Jeff & Joel will have something to say on this. Some info on my background: Primarily a Java programmer on "enterprisy" systems. Favorite languages: python, scheme 7 years programming experience A very small amount of C++ experience, practically no C experience No immediate "need" to learn C So should I learn C? If so, why? If not, why? C or Assembly? Lots of folks recomending Assembler, so add on question: Is it better to learn C or Assembler? If Assembler, which one? Recommended assemblers so far: Motorolla 68000 Intel Assembler (does he mean x86?) MASM32

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  • Small program for rotating images

    - by ldigas
    I need a small program (well, it doesn't have to be small, ... that's just there to avoid suggestions like Photoshop or Autocad) for cropping and rotating images by degrees. (have a bunch of scanned images that I'm just touching up for some paper) What would be the least-fuss suggestion for this ?

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  • Reading In A String and comparing it C

    - by ahref
    Im trying to create a C based string menu where a user inputs a command and then a block of code runs. Whatever i do the conditional is never true: char *input= ""; fgets(input, 50, stdin); printf("%s",input); printf("%d",strcmp( input,"arrive\0")); if(strcmp( input,"arrive\0")==0){.... Im fairly new to c and am finding strings really annoying. What am i doing wrong?

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  • Storing info in a PostgreSQl database issue

    - by MrEnder
    Ok I am making a registry for my website. First page asks for some personal info if($error==false) { $query = pg_query("INSERT INTO chatterlogins(firstName, lastName, gender, password, ageMonth, ageDay, ageYear, email, createDate) VALUES('$firstNameSignup', '$lastNameSignup', '$genderSignup', md5('$passwordSignup'), $monthSignup, $daySignup, $yearSignup, '$emailSignup', now());"); $query = pg_query("INSERT INTO chatterprofileinfo(email, lastLogin) VALUES('$emailSignup', now());"); $userNameSet = $emailSignup; $_SESSION['$userNameSet'] = $userNameSet; header('Location: signup_step2.php'.$rdruri); } The first query works. The second query works but doesn't save the email... the session doesn't work but the header works and sends me to the next page I get no errors even if I comment out header next page @session_start(); $conn = pg_connect("host=localhost dbname=brittains_db user=brittains password=XXXX" ); $signinCheck = false; $checkForm = ""; if(isset($_SESSION['$userName'])) { $userName = $_SESSION['$userName']; $signinCheck = true; $query = pg_query("UPDATE chatterprofileinfo SET lastLogin='now()' WHERE email='$userName'"); } if(isset($_SESSION['$userNameSet'])) { $userName = $_SESSION['$userNameSet']; $signinCheck = true; $query = pg_query("UPDATE chatterprofileinfo SET lastLogin='now()' WHERE email='$userName'"); } This is the top starting the session depending on if your logged in or not. then if I enter in the info here and put it through this if($error==false) { $query = pg_query("UPDATE chatterprofileinfo SET aboutSelf='$aboutSelf', hobbies='$hobbies', music='$music', tv='$tv', sports='$sports', lastLogin='now()' WHERE email='$userName'") or exit(pg_last_error()); //header('Location: signup_step3.php'.$rdruri); } nothing shows up for on my database from this. I have no idea where I went wrong the website is http://opentech.durhamcollege.ca/~intn2201/brittains/chatter/

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  • Are you as productive in Javascript as you are in .Net or Java?

    - by bglenn
    I code primarily in javascript and in vb.net. I've found that if I can achieve the same thing in both javascript and vb.net that I feel far more productive and expressive using javascript for the task. I often find myself researching server-side javascript implementations to see if anything has gone mainstream so that I can code my back-end business logic and data access in javascript. Given all the advanced tooling and language features in .Net this preference seems somewhat paradoxical to me. I'm not suggesting one is better than the other (I've been a vb programmer since I started programming), I'm just wondering if my preference is entirely subjective or if anyone else shares it. So, does anyone else enjoy coding in javascript to the point where you prefer it to the .Net and Java environment, and if, so why?

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  • Remove all html tags from attributes in rails

    - by Hock
    I have a Project model and it has some text attributes, one is summary. I have some projects that have html tags in the summary and I want to convert that to plain text. I have this method that has a regex that will remove all html tags. def strip_html_comments_on_data self.attributes.each{|key,value| value.to_s.gsub!(/(<[^>]+>|&nbsp;|\r|\n)/,"")} end I also have a before_save filter before_save :strip_html_comments_on_data The problem is that the html tags are still there after saving the project. What am I missing? And, is there a really easy way to have that method called in all the models? Thanks, Nicolás Hock Isaza

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  • Invalid Cast Exception ASP.NET C#

    - by Shadow Scorpion
    I have a problem in this code: public static T[] GetExtras <T>(Type[] Types) { List<T> Res = new List<T>(); foreach (object Current in GetExtras(typeof(T), Types)) { Res.Add((T)Current);//this is the error } return Res.ToArray(); } public static object[] GetExtras(Type ExtraType, Type[] Types) { lock (ExtraType) { if (!ExtraType.IsInterface) return new object[] { }; List<object> Res = new List<object>(); bool found = false; found = (ExtraType == typeof(IExtra)); foreach (Type CurInterFace in ExtraType.GetInterfaces()) { if (found = (CurInterFace == typeof(IExtra))) break; } if (!found) return new object[] { }; foreach (Type CurType in Types) { found = false; if (!CurType.IsClass) continue; foreach (Type CurInterface in CurType.GetInterfaces()) { try { if (found = (CurInterface.FullName == ExtraType.FullName)) break; } catch { } } try { if (found) Res.Add(Activator.CreateInstance(CurType)); } catch { } } return Res.ToArray(); } } When I'm using this code in windows application it works! But I cant use it on ASP page. Why?

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  • How does one get UI_USER_INTERFACE_IDIOM() to work with iPhone OS SDK < 3.2

    - by drootang
    Apple advises using the following code to detect whether running on an iPad or iPhone/iPod Touch: if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { // The device is an iPad running iPhone 3.2 or later. // [for example, load appropriate iPad nib file] } else { // The device is an iPhone or iPod touch. // [for example, load appropriate iPhone nib file] } The problem is that UI_USER_INTERFACE_IDIOM() and UIUserInterfaceIdiomPad are NOT defined in the SDKs priory to 3.2. This seems to completely defeat the purpose of such a function. They can only be compiled and run on iPhone OS 3.2 (iPhone OS 3.2 can only be run on iPad). So if you can use UI_USER_INTERFACE_IDIOM(), the result will always be to indicate an iPad. If you include this code and target OS 3.1.3 (the most recent iPhone/iPod Touch OS) in order to test your iPhone-bound universal app code, you will get compiler errors since the symbols are not defined in 3.1.3 or earlier. If this is the recommended-by-Apple approach to runtime device-detection, what am I doing wrong? Has anyone succeeded using this approach to device-detection?

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  • Separate Query for Count

    - by Anraiki
    Hello, I am trying to get my query to grab multiple rows while returning the maximum count of that query. My query: SELECT *, COUNT(*) as Max FROM tableA LIMIT 0 , 30 However, it is only outputting 1 record. I would like to return multiple record as it was the following query: SELECT * FROM tableA LIMIT 0 , 30 Do I have to use separate queries?

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  • SWFupload adding extra extension?

    - by st4ck0v3rfl0w
    Hi Everyone, I've been struggling with this for a half day and can't seem to figure out why SWFupload is adding an extra extension to my uploads? (e.g. burer.jpg.jpg) I've reviewed the below code a thousand times and can't figure out why my files (whether png, gif or jpg) get an added .jpg extension? <?php $POST_MAX_SIZE = ini_get('post_max_size'); $unit = strtoupper(substr($POST_MAX_SIZE, -1)); $multiplier = ($unit == 'M' ? 1048576 : ($unit == 'K' ? 1024 : ($unit == 'G' ? 1073741824 : 1))); if ((int)$_SERVER['CONTENT_LENGTH'] > $multiplier*(int)$POST_MAX_SIZE && $POST_MAX_SIZE) { header("HTTP/1.1 500 Internal Server Error"); // This will trigger an uploadError event in SWFUpload echo "POST exceeded maximum allowed size."; exit(0); } // Settings $save_path = "/home/images/"; $upload_name = "image"; $max_file_size_in_bytes = 2147483647; // 2GB in bytes $extension_whitelist = array("jpg", "gif", "png", "jpeg"); // Allowed file extensions $valid_chars_regex = '.A-Z0-9_ !@#$%^&()+={}\[\]\',~`-'; // Characters allowed in the file name (in a Regular Expression format) // Other variables $MAX_FILENAME_LENGTH = 260; $file_name = ""; $file_extension = ""; $uploadErrors = array( 0=>"There is no error, the file uploaded successfully", 1=>"The uploaded file exceeds the upload_max_filesize directive in php.ini", 2=>"The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form", 3=>"The uploaded file was only partially uploaded", 4=>"No file was uploaded", 6=>"Missing a temporary folder" ); // Validate the upload if (!isset($_FILES[$upload_name])) { HandleError("No upload found in \$_FILES for " . $upload_name); exit(0); } else if (isset($_FILES[$upload_name]["error"]) && $_FILES[$upload_name]["error"] != 0) { HandleError($uploadErrors[$_FILES[$upload_name]["error"]]); exit(0); } else if (!isset($_FILES[$upload_name]["tmp_name"]) || !@is_uploaded_file($_FILES[$upload_name]["tmp_name"])) { HandleError("Upload failed is_uploaded_file test."); exit(0); } else if (!isset($_FILES[$upload_name]['name'])) { HandleError("File has no name."); exit(0); } // Validate the file size (Warning: the largest files supported by this code is 2GB) $file_size = @filesize($_FILES[$upload_name]["tmp_name"]); if (!$file_size || $file_size > $max_file_size_in_bytes) { HandleError("File exceeds the maximum allowed size"); exit(0); } if ($file_size <= 0) { HandleError("File size outside allowed lower bound"); exit(0); } // Validate file name (for our purposes we'll just remove invalid characters) $file_name = preg_replace('/[^'.$valid_chars_regex.']|\.+$/i', "", $_FILES[$upload_name]['name']); if (strlen($file_name) == 0 || strlen($file_name) > $MAX_FILENAME_LENGTH) { HandleError("Invalid file name"); exit(0); } // Validate file extension $path_info = pathinfo($_FILES[$upload_name]['name']); $file_extension = $path_info["extension"]; $is_valid_extension = false; foreach ($extension_whitelist as $extension) { if (strcasecmp($file_extension, $extension) == 0) { $is_valid_extension = true; break; } } if (!$is_valid_extension) { HandleError("Invalid file extension"); exit(0); } if (!@move_uploaded_file($_FILES[$upload_name]["tmp_name"], $save_path.$file_name)) { HandleError("File could not be saved."); exit(0); } HandleError($_FILES[$upload_name]['name']); exit(0); function HandleError($message) { echo $message; } ?>

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