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Internet Explorer Returns Incorrect JavaScript Object Length

Internet Explorer will incorrectly give an object length off by one if the object contains a trailing comma. In the example below, the alerts return 5 and 6, respectively.
HTML
<!doctype html>
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <title></title>
</head>
<body>
    <script type="text/javascript">
    alert(
        [
            'a',
            'b',
            'c',
            'd',
            'e'
        ].length
    );
    alert(
        [
            'a',
            'b',
            'c',
            'd',
            'e',
        ].length
    );
    </script>
</body>
</html>

Firefox Move Tab First, Last

To send the current tab to the beginning or end of the list of currently open tabs, add the following hotkey shortcuts to Keyconfig:
Add "Move Tab First" using keyboard shortcut Alt+Home. This will move the focused tab to the first position in the list.
Javascript
gBrowser.moveTabTo(gBrowser.mCurrentTab, 0);

Add "Move Tab Last" using keyboard shortcut Alt+End. This will move the focused tab to the last position in the list.
Javascript
gBrowser.moveTabTo(gBrowser.mCurrentTab, gBrowser.mTabContainer.childNodes.length - 1);

NOTE: Alt+Home is already used by "Home" so i disabled that default shortcut and I am using the Firefox add-on New Tab Homepage. http://www.google.com/search?btnI&q=New+Tab+Homepage
NOTE: This is in addition to my previous post
http://darklaunch.com/2009/09/30/firefox-move-tab-left-and-move-tab-right-with-wrapping-without-requiring-focus

Gmail Fixed Width Font; Fixed width fonts in Gmail; Monospace

To force messages to use a fixed width font, create or edit your Firefox userContent.css file.
Code
/home/YOURUSER/.mozilla/firefox/YOURPROFILE/chrome/userContent.css
 

For Windows:
Code
C:\Documents and Settings\YOURUSER\Application Data\Mozilla\Firefox\Profiles\YOURPROFILE\chrome\userContent.css
 

Add the following
CSS
@-moz-document domain(google.com) {
    .ii, /* message body */
    .Ak  /* textarea when composing */
    {
        font-family:monospace !important;
        font-size:100% !important;
    }
}

Restart Firefox and now messages viewed in Gmail will be displayed with a proportional font properly aligned.

Close Terminal After Script Completes / Command Exits

To close Terminal after a script completes you will need to change it in the profile preference.
Open Terminal.
Right-click in the window and select Profile > Profile Preferences.
Open the Title and Command tab.
For "When command exists:" select "Exit the terminal".
NOTE:
myscript.py required user input. So I added a Keyboard Shortcut with the "Command" of:
Code
 
gnome-terminal --command=/path/to/myscript.py
 

The shortcut opens a terminal window for the input. The scripts then runs and the Terminal window closes after the script completes.

Clear Private Data In Firefox WITHOUT the "Clear Recent History" Dialog Window; Clear Recent History

UPDATE: Sanitisminau will clear your history WITHOUT asking.
https://addons.mozilla.org/en-US/firefox/addon/5364/
UPDATE 2: Clear private data with alert notification (and without asking):
1. Save the addon using the link above (right click and "Save Link As").
2. Open addon-5364-latest.xpi in an archive manager (like File Roller).
3. Edit addon-5364-latest.xpi/chrome/sanitisminau.jar/content/sanitisminau.js
4. Replace the code with:
Javascript
 
var Sanitisminau = {
    onLoad: function() {
        document.getElementById("Tools:Sanitize").setAttribute("oncommand", "Sanitisminau.goansanitismi();");
        document.getElementById("sanitizeItem").setAttribute("hidden", true);
    },
 
    goansanitismi: function() {
        var alertService = Components.classes["@mozilla.org/alerts-service;1"].getService(Components.interfaces.nsIAlertsService);
        var s = new Sanitizer();
        s.range = Sanitizer.getClearRange();
        s.ignoreTimespan = false;
        s.prefDomain = "privacy.cpd.";
        try {
            s.sanitize();
            alertService.showAlertNotification(null, "Success", "Private Data Cleared!", false, "", null);
        }
        catch (er) {
            alertService.showAlertNotification(null, "ERROR", er, false, "", null);
        }
    }
}; 
 
window.addEventListener("load", function(e) { Sanitisminau.onLoad(e); }, false);

5. Install the addon you updated. Type something like file:///home/user/Downloads/addon-5364-latest.xpi (or wherever you saved the addon) into the Firefox url bar and a software installation confirmation will appear. Click "Install Now" after the count down. Restart Firefox.
---
To clear private data in Firefox without the confirmation window, do the following:
1. Install Keyconfig.
2. Add a new key named Clear Private Data.
3. Add the following code:
Javascript
 
function evalScript(script, callback){
    try {
        eval.call(window, script);
        callback();
    }
    catch (er){
        alertService.showAlertNotification(null, "ERROR", er, false, "", null);
    }
}
 
function getScript(scriptName, callback){
    var gXMLHttpRequest;
    gXMLHttpRequest = new XMLHttpRequest();
    gXMLHttpRequest.onload =
        function(e){
            evalScript(gXMLHttpRequest.responseText, callback);
        };
    gXMLHttpRequest.open("GET", "chrome://browser/content/" + scriptName);
    gXMLHttpRequest.send(null);
}
 
var alertService = Components.classes["@mozilla.org/alerts-service;1"].getService(Components.interfaces.nsIAlertsService);
getScript("sanitize.js",
    function(){
        try{
            var s = new Sanitizer();
            s.prefDomain = "privacy.cpd.";
            s.sanitize();
            alertService.showAlertNotification(null, "Success", "Private Data Cleared!", false, "", null);
        }
        catch(er){
            alertService.showAlertNotification(null, "ERROR", er, false, "", null);
        }
    }
);

4. Set your preferred hotkey. Something like Alt+Ctrl+Shift+Del.
5. Open a new window for the new hotkey to work. Press the hotkey you set and a notification in the corner will appear.

Clear Firefox Cache Hotkey/Shortcut using Keyconfig

UPDATE: https://addons.mozilla.org/en-US/firefox/addon/5364/
---
To clear Firefox's cache using a simple hotkey, do the following:
1. Install Keyconfig.
2. Add a new key named Clear Cache.
3. Add the following code:
Javascript
 
var cacheService = Components.classes["@mozilla.org/network/cache-service;1"].getService(Components.interfaces.nsICacheService);
var alertsService = Components.classes["@mozilla.org/alerts-service;1"].getService(Components.interfaces.nsIAlertsService);
try{
    cacheService.evictEntries(Components.interfaces.nsICache.STORE_ON_DISK);
    cacheService.evictEntries(Components.interfaces.nsICache.STORE_IN_MEMORY);
    alertsService.showAlertNotification(null, "Success", "Cache cleared!", false, "", null);
}
catch(exception){
    alertsService.showAlertNotification(null, "Exception", exception, false, "", null);
}

4. Set your preferred hotkey.
5. Open a new window for the hotkey to work. Press the hotkey you set and a notification in the corner will appear.
NOTE:
Go to about:cache in Firefox to see cache usage before and after clearing cache.
NOTE:
Other Storage Policy:
STORE_ANYWHERE - cache stored in any device
STORE_IN_MEMORY - cache entry in non-persistent storage (RAM)
STORE_ON_DISK - cache entry in persistent storage (HDD)
STORE_ON_DISK_AS_DISK - cache entry in persistent storage in a specific file

Automation server can't create object; jQuery

"Automation server can't create object" fixed:
Run your script with jquery-1.3.2.js (not compressed version) and the error is occurring on line 3382.
Lines 3381, 3382, 3383:
Javascript
xhr:function(){
    return window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();
},

Replace the xhr function with:
Javascript
xhr:function(){
    if (window.XMLHttpRequest) {
        return new XMLHttpRequest();
    }
    else if (window.ActiveXObject) {
        try {
            return new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch(e) {
            try {
                return new ActiveXObject("Msxml2.XMLHTTP");
            }
            catch(e) {
                return false;
            }
        }
    }
},

The following code reproduces the error message in Internet Explorer 8:
HTML
<!doctype html>
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <title></title>
    <script type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.3.2.js"></script>
</head>
<body>
    <script type="text/javascript">
    $.ajax({
        type: 'GET',
        url: 'http://127.0.0.1/'
    });
    </script>
</body>
</html>

image

Force Plain Text Format in Internet Explorer WITHOUT Registry Hack [SOLVED]

Internet Explorer uses MIME sniffing to parse pages and will erroneously render the following page as html:
PHP
 
header('Content-Type: text/plain');
echo '<body>';
echo '<span style="font-size:600%;">';
echo 'normal <strong>bold</strong>';
echo '</span>';

To force Internet Explorer to render the page as plain text, add the following before any text is output:
PHP
 
header('Content-Type: text/plain');
echo '                                                  ';
echo '                                                  ';
echo '                                                  ';
echo '                                                  ';
echo '                                                  ';
echo "\n";

Example:
The following will render as plain text in Internet Explorer:
PHP
 
header('Content-Type: text/plain');
echo '                                                  ';
echo '                                                  ';
echo '                                                  ';
echo '                                                  ';
echo '                                                  ';
echo "\n";
echo '<body>';
echo '<span style="font-size:600%;">';
echo 'normal <strong>bold</strong>';
echo '</span>';

Or simply:
PHP
 
header('Content-Type: text/plain');
echo str_repeat(' ', 250) . "\n";
echo '<body>';
echo '<span style="font-size:600%;">';
echo 'normal <strong>bold</strong>';
echo '</span>';

UPDATE: Sending the X-Content-Type-Options response header will stop MIME-sniffing.
PHP
 
header('X-Content-Type-Options: nosniff');

Python Time Duration Human; Friendly Timestamp

Python
 
#!/usr/bin/python
 
def duration_human(seconds):
    seconds = long(round(seconds))
    minutes, seconds = divmod(seconds, 60)
    hours, minutes = divmod(minutes, 60)
    days, hours = divmod(hours, 24)
    years, days = divmod(days, 365.242199)
 
    minutes = long(minutes)
    hours = long(hours)
    days = long(days)
    years = long(years)
 
    duration = []
    if years > 0:
        duration.append('%d year' % years + 's'*(years != 1))
    else:
        if days > 0:
            duration.append('%d day' % days + 's'*(days != 1))
        if hours > 0:
            duration.append('%d hour' % hours + 's'*(hours != 1))
        if minutes > 0:
            duration.append('%d minute' % minutes + 's'*(minutes != 1))
        if seconds > 0:
            duration.append('%d second' % seconds + 's'*(seconds != 1))
    return ' '.join(duration)

Example:
Python
 
seconds = [
    1,
    2,
    3600,
    7201,
    49020,
    86400,
    100000,
    172800,
    300000,
    31697026,
    63200000,
    95000000,
    999999999
]
for s in seconds:
    print str(s).rjust(10, ' '), '=>', duration_human(s)

Example Output:
Code
 
         1 => 1 second
         2 => 2 seconds
      3600 => 1 hour
      7201 => 2 hours 1 second
     49020 => 13 hours 37 minutes
     86400 => 1 day
    100000 => 1 day 3 hours 46 minutes 40 seconds
    172800 => 2 days
    300000 => 3 days 11 hours 20 minutes
  31697026 => 1 year
  63200000 => 2 years
  95000000 => 3 years
 999999999 => 31 years
 

Example 2:
Python
 
#!/usr/bin/python
 
import time
 
start = time.time()
 
time.sleep(1)
 
end = time.time()
elapsed = end - start
print duration_human(elapsed), 'has passed'

Example 2 Output:
Code
 
1 second has passed
 

Windows XP Remove Boot / Shutdown / Logon / Logoff status messages

To remove the message boxes / windows that appear while Windows is loading do the following:
1. Start > Run > gpedit.msc > Click OK
2. In the Group Policy window select Local Computer Policy > Computer Configuration > Administrative Templates > System.
3. On the right, double-click the "Remove Boot / Shutdown / Logon / Logoff status messages" setting and select Enabled, click Apply and OK.
Restart your computer and the loading message windows / boxes will not appear.
NOTE: You may also want to disable the Welcome screen: Control Panel > User Accounts > Change the way users log on or off > uncheck "Use the Welcome screen" > click Apply Options.