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  • Why doesn't "cd" work in a bash shell script?

    - by askgelal
    I'm trying to write a small script to change the current directory to my project directory: #!/bin/bash cd /home/askgelal/projects/java I saved this file as proj, changed the chmod, copied it to /usr/bin. When I call it by: proj, it does nothing. What am I doing wrong?

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  • File uploads simply do not work - what could be wrog server side?

    - by vanneto
    This has been grinding my gears for at least a week now. I have a site which has a crucial function - the upload component. Without it, the site is completely useless. Now, lots of users have problems uploading files. This is why I implemented a log system that keeps track of what happens when the file is on the server. Problem is, only a minority of problems happen when the file is on the server, the problems happen client side. For example, when I tried SWFUpload the errors where 'I/O Error'. When I changed to Uploadify I get 'HTTP Error'. I am trying to get a more detailed error description as I type this. I am starting to think its not the client or the upload software, but the server. What could be wrong? The following directives for PHP are set: upload_max_filesize 200M post_max_size 200M memory_limit 256M max_execution_time 4200 max_input_time 4200 I simply have no clue why file uploads are failing. They should not fail. I would really appreciate any answers as why the uploads could be failing. Thank you.

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  • .NET's double.NaN - how does this counterintuitive feature work?

    - by GeReV
    I stumbled upon the definition of double.NaN in code: public const double NaN = (double)0.0 / (double)0.0; This is done similarly in PositiveInfinity and NegativeInfinity. double.IsNaN (with removing a few #pragmas and comments) is defined as: [Pure] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] public static bool IsNaN(double d) { if (d != d) { return true; } else { return false; } } This is, by far, the most counterintuitive thing I have ever seen in the .NET framework. How is 0.0 / 0.0 represented "behind the scenes"? How can division by 0 be possible in double, and why does NaN != NaN?

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  • java.awt.Desktop.open doesn’t work with PDF files?

    - by Jason S
    It looks like I cannot use Desktop.open() on PDF files regardless of location. Here's a small test program: package com.example.bugs; import java.awt.Desktop; import java.io.File; import java.io.IOException; public class DesktopOpenBug { static public void main(String[] args) { try { Desktop desktop = null; // Before more Desktop API is used, first check // whether the API is supported by this particular // virtual machine (VM) on this particular host. if (Desktop.isDesktopSupported()) { desktop = Desktop.getDesktop(); for (String path : args) { File file = new File(path); System.out.println("Opening "+file); desktop.open(file); } } } catch (IOException e) { e.printStackTrace(); } } } If I run DesktopOpenBug with arguments c:\tmp\zz1.txt c:\tmp\zz.xml c:\tmp\ss.pdf (3 files I happen to have lying around) I get this result: (the .txt and .xml files open up fine) Opening c:\tmp\zz1.txt Opening c:\tmp\zz.xml Opening c:\tmp\ss.pdf java.io.IOException: Failed to open file:/c:/tmp/ss.pdf. Error message: The parameter is incorrect. at sun.awt.windows.WDesktopPeer.ShellExecute(Unknown Source) at sun.awt.windows.WDesktopPeer.open(Unknown Source) at java.awt.Desktop.open(Unknown Source) at com.example.bugs.DesktopOpenBug.main(DesktopOpenBug.java:21) What the heck is going on? I'm running WinXP, I can type "c:\tmp\ss.pdf" at the command prompt and it opens up just fine. edit: if this is an example of Sun Java bug #6764271 please help by voting for it. What a pain. :(

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  • If the "with" statement in Javascript creates a new scope, why does the following code not work as e

    - by Jian Lin
    If the "with" statement in Javascript creates a new scope, shouldn't clicking on the links show a different x which are in different scopes? It doesn't. <a href="#" id="link1">ha link 1</a> <a href="#" id="link2">ha link 2</a> <a href="#" id="link3">ha link 3</a> <a href="#" id="link4">ha link 4</a> <a href="#" id="link5">ha link 5</a> <script type="text/javascript"> for (i = 1; i <= 5; i++) { with({foo:"bar"}) { var x = i; document.getElementById('link' + i).onclick = function() { alert(x); return false; } } } </script>

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  • MYSQL Insert: How to save Query in the database only one time - duplicate key doesn't work!

    - by elmaso
    hello, I want to save a query only one time in the database, this is my code: $querystat = mysql_real_escape_string($_GET['q']); $datetime = time(); if( ($querystat != $_SESSION['prev_search']) OR ( ($datetime - $_SESSION['datetime']) > 60) ) { $insertquery = "INSERT INTO `query` ( `searchquery` , `datetime`) VALUES ( '$querystat' , '$datetime') ON DUPLICATE KEY UPDATE searchquery='$querystat';"; mysql_query($insertquery, $db); } maybe something with == 0 ?

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  • Does the List in .NET work the same way as arraylist in Java?

    - by eflles
    When I learned Java, I was told that the arraylist works this way: It creates an array with room for 10 elements. When the 11th element is added, it is created a new list with room for 20 elements, and the 10 elements are copied into the new array. This will repeat as until there are no more elements to add, or to a maximum size. Is the List in .NET constructed the same way?

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  • Why does my UI controls work on iPhone but not iPad?

    - by Andrew
    I have an iPhone app, which consists of a table view containing various custom UITableViewCells, with UISlider and UISwitch controls. When running the app on the iphone, I can move the slider and switches contained in each of the table cells. When I run the same app on the iPad. I can not. None of the controls within the table view will respond to touches. I have checked 'User Interaction Enabled' within the Interface Builder. Anybody got any suggestions of where I should be looking for the cause of different behavior between the iPhone and iPad, in respect to UIControls.

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  • mysql_connect() doesn't work when run by apache; works from command line.

    - by Skeeter
    Hi, I have a strange issue. I'm trying to write a simple php webpage on my server, but mysql_connect() doesn't connect to any server, either local or otherwise. Here's where it gets strange. If I take the same php script and run it from the commandline, the script works. phpinfo() indicates that both the file (being run by apache) and the commandline (run as root) are calling the same version of php, mysql is loaded, and the php.ini is the same. Furthermore, I'm running a MediaWiki installation on this same server, and it's using the mysqld installed locally and works just fine, so I'm completely at a loss as to why the code isn't working. The error I receive on runtime: Can't connect to MySQL server on 'xxx.xxx.xxx.xxx' (13) (The IP is x'd out for the privacy of the owner of the server I'm connecting to)

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  • GCommit doesn't work with fugitive.vim under windows xp?

    - by Paul Wicks
    I've just discovered fugitive.vim, which is pretty cool. However, I've run into a problem (this is using windows xp, msys git 1.7, fugitive.vim 1.1, and gvim 7.2). Adding files to the index and checking the status works just fine, but when I do a :GCommit, a command prompt flashes for a second and nothing happens. No way to type a commit message and nothing is committed. Is this a bug? Am I doing something wrong?

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  • SVN files edited thru FTP, How do I fix the edited files so they work thru SVN again?

    - by Bobby
    Basically, a 3rd party analyst we brought on to make some improvements to our site decided to edit files directly on the live server threw FTP. Any time we make changes to those pages threw SVN we have PHP parse errors. Things should be edited threw the SVN and committed. We have our working copies setup so we can edit them how ever we want while having them running under apache for testing. We commit all of our changes to a local repository, then commit from there to the live server. The code on the live server that causes the parse error has " .mine" and " .rxxxx", and my question is, how can I revert those files back to before they were edited thru FTP so I can update them threw SVN again?

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  • Why does this SQL work in VS but not in code?

    - by acidzombie24
    The line cmd.ExecuteNonQuery(); cmd.CommandText CREATE TRIGGER subscription_trig_0 ON subscription AFTER INSERT AS UPDATE user_data SET msg_count = msg_count + 1 FROM user_data JOIN INSERTED ON user_data.id = INSERTED.recipient; The exception: Incorrect syntax near the keyword 'TRIGGER'. Then using VS 2010, connected to the very same file (a mdf file) i run the query above and i get a success message.

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  • How to make this jQuery snippet work in Internet Explorer?

    - by George Edison
    If there was ever a time to hate IE, this is it. This code begins with a box with content. When the button is clicked, the box is supposed to drop down and fade-in. <html> <script type="text/javascript" src="jquery.js"></script> <script type='text/javascript'> function Test() { var item_height = $('#test').height(); $('#test').height(0); $('#test').css('opacity','0'); $('#test').animate({ height: item_height, opacity: '1' },400); } </script> <body> <!-- The div below holds the sample content --> <div id="test" style='border: 1px solid black;'> Content<br> Content<br> Content<br> Content<br> Content </div> <!-- The button to test the animation --> <br><br> <div style='position: absolute; top: 150px; left: 10px;'> <button onclick='Test();'>Test</button> </div> </body> </html> This very simple example works on Chrome, Safari, and Opera. But Internet Explorer? No. How can I (if it's even possible) fix this so that it works in IE?

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  • Why does the 'as' keyword work while the () cast does not.

    - by Mausimo
    //always works, returning a valid object into _page _page = _httpContext.Handler as System.Web.UI.Page; //Fails throwing the exception : Unable to cast object of type 'System.Web.DefaultHttpHandler' to type 'System.Web.UI.Page' _page = (System.Web.UI.Page)_httpContext.Handler; I would like to know why this happens?

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  • For text-align:right; in TD, why does "style" work and "class" not?

    - by Will Fastie
    If I include this in a table cell: <td style="text-align: right; font-style: italic; color: maroon;">... the contents of the cell are aligned as I expect. If I include the following CSS: .right-notice { text-align: right; font-style: italic; color: maroon; } and this cell: <td class=".right-notice">... the contents of the cell are not right aligned. Why is this? What don't I know? If I change the CSS to replace text-align with float, that works. Thanks.

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  • Why Timer does not work if we do not generate a window?

    - by Roman
    Here is the code: import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.Timer; public class TimerSample { public static void main(String args[]) { new JFrame().setVisible(true); ActionListener actionListener = new ActionListener() { public void actionPerformed(ActionEvent actionEvent) { System.out.println("Hello World Timer"); } }; Timer timer = new Timer(500, actionListener); timer.start(); } } It generates a window and then periodically prints "Hello World Timer" in the terminal (Command Prompt). If I comment this line new JFrame().setVisible(true); the application do not print anything to the command line. Why?

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  • How does browser search tool work on web page?

    - by GTM
    I am trying to figure out how the search tool in a web browser is being able to parse through the entire web page(assuming huge content on a page) and highlight the result as we type. Does it pre-cache the page while loading in a map or use regex to get a quick result on the fly?

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