Gliding Phenomena

SVN: Moving subversion repository from one server to another server

This works between any kind of servers windows or linux...

Step 1: Backup / create a dump of old repository

svnadmin dump /path/to/repository > repo_name.dump

Step 2: Create a new repository on the new server

svnadmin create /path/to/repository

Step 3: Import the the old repository

svnadmin load /path/to/repository < repo_name.dump

Matlab: Sort 2D array with respect to one column

sort function in Matlab, sorts matrix columns independently.
But,
B = sortrows(A, column) sorts the matrix based on the columns specified in the vector column.

Example:

>> A = [2 10; -1 20; 5 40]

A =

2 10
-1 50
5 15

>> sortrows(A, 1)

ans =

-1 50
2 10
5 15

>> sortrows(A, 2)

ans =

2 10
-1 50
5 15

MATLAB: String tokenizer, string split

myStr = 'one_two_three';
pieces = regexp(myStr , '_', 'split')

%Output would be an pieces array with 3 elements.
pieces =

'one' 'two' 'three'

Academy Excellence Award 2011 to Dr. P Seetharamaiah

The Prime Minister, Dr. Manmohan Singh presenting the Academy Excellence Award 2011 to Dr. P Seetharamaiah, at the DRDO Awards presentation ceremony, in New Delhi on July 31, 2012. The Defence Minister, Shri A. K. Antony is also seen.

Generate 2048 CSR using openssl


openssl req -new -nodes -subj "/C=US/ST=Florida/L=Tampa/O=My Org Pvt Limited/OU=Some Dept/CN=abc.xyz.com" -keyout private.txt -out certreq.txt -newkey rsa:2048

Minify/compress JavaScript, CSS compressor

Quick and easy way to minify/compress JavaScript and CSS

JS Compress and Obfuscate : http://www.minifyjs.com/javascript-obfuscator/
JS Compress only: http://www.minifyjs.com/javascript-compressor/
CSS compressor : http://www.minifycss.com/css-compressor/

UNIX: Bash Keyboard shortcuts

Very useful neat shortcuts for traversing in Bash command line :)

Command Editing Shortcuts

Ctrl + a – go to the start of the command line
Ctrl + e – go to the end of the command line
Ctrl + k – delete from cursor to the end of the command line
Ctrl + u – delete from cursor to the start of the command line
Ctrl + w – delete from cursor to start of word (i.e. delete backwards one word)
Ctrl + y – paste word or text that was cut using one of the deletion shortcuts (such as the one above) after the cursor
Ctrl + xx – move between start of command line and current cursor position (and back again)
Alt + b – move backward one word (or go to start of word the cursor is currently on)
Alt + f – move forward one word (or go to end of word the cursor is currently on)
Alt + d – delete to end of word starting at cursor (whole word if cursor is at the beginning of word)
Alt + c – capitalize to end of word starting at cursor (whole word if cursor is at the beginning of word)
Alt + u – make uppercase from cursor to end of word
Alt + l – make lowercase from cursor to end of word
Alt + t – swap current word with previous
Ctrl + f – move forward one character
Ctrl + b – move backward one character
Ctrl + d – delete character under the cursor
Ctrl + h – delete character before the cursor
Ctrl + t – swap character under cursor with the previous one

Command Recall Shortcuts

Ctrl + r – search the history backwards
Ctrl + g – escape from history searching mode
Ctrl + p – previous command in history (i.e. walk back through the command history)
Ctrl + n – next command in history (i.e. walk forward through the command history)
Alt + . – use the last word of the previous command

Command Control Shortcuts

Ctrl + l – clear the screen
Ctrl + s – stops the output to the screen (for long running verbose command)
Ctrl + q – allow output to the screen (if previously stopped using command above)
Ctrl + c – terminate the command
Ctrl + z – suspend/stop the command

Bash Bang (!) Commands

!! - run last command
!blah – run the most recent command that starts with ‘blah’ (e.g. !ls)
!blah:p – print out the command that !blah would run (also adds it as the latest command in the command history)
!$ – the last word of the previous command (same as Alt + .)
!$:p – print out the word that !$ would substitute
!* – the previous command except for the last word (e.g. if you type ‘find some_file.txt /‘, then !* would give you ‘find some_file.txt‘)
!*:p – print out what !* would substitute

Source: http://www.skorks.com/2009/09/bash-shortcuts-for-maximum-productivity/ http://www.ice2o.com/bash_quick_ref.html

jQuery: Select a radio button by name and value

Using jQuery, if you want to select a specific radio button based on name and value

 $(':radio[name="radioBtnName"][value="radioValue"]');

Example:



<div id="radioGrps">  
   <div id="setOne">  
       <input type="radio" name="orange" value="5" />  
       <input type="radio" name="orange" value="10" checked />  
       <input type="radio" name="orange" value="20" />  
   </div>  
   <div id="setTwo">  
      <input type="radio" name="peach" value="10" />  
      <input type="radio" name="peach" value="15" />  
      <input type="radio" name="peach" value="20" checked />  
  </div>  
 </div>

In the above example, if you want to select radio button in div#setOne with value 10, then


$('#setOne :radio[name="orange"][value="10"]');  
 or  
 $(':radio[name="orange"][value="10"]');  
 //to make it checked  
 $(':radio[name="orange"][value="10"]').attr('checked', 'checked');

Eclipse color theme

Download eclipse color theme plugin for easy installation of several color themes for your Eclipse IDE.

If you are on Eclipse 3.6 (Helios), the easiest way to install the plugin is from the Eclipse Marketplace. Go to Help→Eclipse Marketplace..., then search for Eclipse Color Theme and install it.

If you are on Eclipse 3.5 (Galileo), go to Help→Install New Software..., press Add Site and enterEclipse Color Theme as the name and http://eclipse-color-theme.github.com/update as the URL. Then select the new entry from the select box labeled Work with, mark Eclipse Color Theme for installation and proceed.

After the installation, go to Window→Preferences→General→Appereance→Color Theme to change the color theme.

Mac: Take a screenshot in different ways

In Mac OS X, there are 3 ways to take a screenshot.

1. Cmd+Shift+3 : Capture the entire screen.

2. Cmd+Shift+4 : Capture a selected area of your screen. The cursor will turn into a crosshair and you can drag around the area you want to capture.

3. Cmd+Shift+4+Spacebar : Capture a specific window or Dock or menu bar. The crosshair will turn into a little camera and highlight the window or objects you can capture. Left Click to capture.
You can use Expose shortcut to switch between windows. After you switch press alt or cmd key to get the little camera. Left Click to capture.

jQuery: get specific list item by id

Consider the following html snippet

<div id="fruits">  
      <ul>  
           <li id="5">Apples</li>  
           <li id="29">Oranges</li>  
           <li id="32">Peaches</li>  
           <li id="47">Bananas</li>  
           <li id="30">Grapes</li>  
      </ul>  
 </div>

You can get a specific list item using jQuery

 $jq("#fruits ul li[id=32]");

Mac: Mac OS X 10.6.8 Printing Issue, and a Fix

With the recent update to Mac OS X 10.6.8, the printing does not work.
After updating to 10.6.8, you might be Getting “paused printer” message

Download Fix Here

For More details, View This Post

Unix: Get total size of mutliple folders or files

The following command gives the total size of the folders you have selected at the end of the list.

 $ du -sch foo/ dummy/ data/ booger/  
 3G     foo/  
 2G     dummy/  
 9G     data/  
 5G     booger/  
 19G    total

MySQL: Resetting auto-increment value of a table

During development, usually we want to delete records from the table manually, then the tables auto-increment column remains where it was. We might want to reset the auto-increment value for the table.

For example, if you delete records with id's 7,8,9
Now when you insert through application, it inserts the new record starting at 10. But we want it to start at 7.

Use the following SQL to reset to a specific value

 ALTER TABLE my_table AUTO_INCREMENT=7

If you want to delete all records from your table and restart auto-index at 1, then

 TRUNCATE TABLE my_table

MySQL: Calculate DATE, TIME difference in SQL statement using MySQL DB

Following examples showing how to calculated DATE, TIME differences in SQL statement in MySQL database.

Functions used in the following examples are TIMEDIFF and DATEDIFF

 select TIMEDIFF('2011-10-31 12:50:56' , '2011-09-23 12:50:21')   
 The above outputs : 838:59:59

 select TIMEDIFF('15:50:56' , '12:55:21')   
 The above SQL outputs: 02:55:35

 select DATEDIFF('2011-10-31 12:50:56' , '2011-09-23 12:50:21')   
 The above SQL outputs: 38

 select DATEDIFF('2011-10-31' , '2011-09-23')   
 The above SQL outputs: 38