Anil Kumar Buddha's Blog

Monday, July 29, 2013

Decode html entities using javascript

Below is the code to decode the html entities using javascript rather than the Server side scripting

function decodeEntities(input) {
var y = document.createElement('textarea');
y.innerHTML = input;
return y.value;
}

Above function just receives the html values like below

var str = "<p>Hello World<br />This is the test message";

When we pass the above HTML string to the function it returns as below,

calling the JAVASCRIPT function

decodeEntities(str)

Output is: "<p>Hello World<br/>This is the test message";

Thursday, July 18, 2013

Disable right click in a page using javascript

When we want to restrict the right click of the mouse in some of the pages, need to add the below code in the <head> </head> tag within the JAVASCRIPT.

<script type="text/javascript">
var message="Sorry, Right Click has been disabled";
function clickIE() {if (document.all) {window.console.log(message);return false;}}

function clickNS(e) {
if (document.layers||(document.getElementById&&!document.all)) {
if (e.which==2||e.which==3) {window.console.log(message);return false;}
}
}
if (document.layers)
{document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;}
else{document.onmouseup=clickNS;document.oncontextmenu=clickIE;}
document.oncontextmenu=new Function("return false")

</script>

Monday, July 15, 2013

how to select all options in multi select dropdown using jquery

When we use multi select drop down, we may consider the feature for selecting all and deselect all option for the respective Multi Select box.

Using jQuery, we can easily do the select all and deselect all option for the dropdown.

Below is the code to select all using jQuery

HTML
<select name="education" id="education" multiple="multiple">
<option value="1">Under Graduate</option>
<option value="2">Graduate</option>
<option value="3">Post Graduate</option>
<option value="4">Pursuing Graduation</option>
</select>

$('#education').find('option').attr('selected','selected');

Where 'education' is the id for the multi select & we are adding the attribute selected to get selected.

To deselect all using jQuery.

$('#education').find('option').removeAttr('selected','selected');

Wednesday, January 30, 2013

Basic UNIX commands

Below are the basic unix commands which may help you while using PUTTY to access the server. Move, copy, view the pages from folder to other destination. All other basic stuff syntax are given below

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Unix Basic Commands

Copy:

cp sorce_file target_file :copies only if the files are in current direc

cp -r sor_DIR target_dir (to copy directories)

Move/Rename;

mv file1 file2

mv -i f1 f2 (asks for permision to move or not)

Remove:

rm filename

rm -r file (to remove directory structure)

rm -i file ( asks for permision to move or not)

view:

cat filename ( to view the complete file content)

To extract or unzip files:

unzip file ( extracts file to current dir)

To uncompress

uncompress filename

To compress

compress filename

To change directory

cd path

to list files in current dir

ls

ls -l (long list of files : gives acess permision,creation date..etc)

-a(list all files satarting with a " .")

to make a dir

mkdir name or md name

to remove

rmdir dir_name

to clear the screen

clear (clears the windoe or terminal)

help commands

man <comd name> (displays the mannual page)

whatis <cammnd> (gives description)

date (to dispaly the date)

to count the words

wc filename (gives lines,words,characters

wc -l file (only lines)

wc -c file(only characters)

wc -w file(onbly words)

df ( displays the amount of free space)

grep (search a file for matching pattern)

grep [optioln]<regularExpression filename

eg: grep [a-z]*.c filename