OCTOBER 31ST, 2008
By MOHAMMAD SAJJAD HOSSAIN
When working with JavaScript in one of my projects I needed to trim strings and pad them. I googled for a solution and many sources I have got the following codes and sharing with you.
Trimming:
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| //trimming space from both side of the string
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g,"");
}
//trimming space from left side of the string
String.prototype.ltrim = function() {
return this.replace(/^\s+/,"");
}
//trimming space from right side of the string
String.prototype.rtrim = function() {
return this.replace(/\s+$/,"");
} |
Using Trim Functions:
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| //write the code given above
var str = " black ";
alert("a" + str.trim() + "b"); //result "ablackb"
alert("a" + str.ltrim() + "b"); //result "ablack b"
alert("a" + str.rtrim() + "b"); //result "a blackb" |
Padding:
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| //pads left
String.prototype.lpad = function(padString, length) {
var str = this;
while (str.length < length)
str = padString + str;
return str;
}
//pads right
String.prototype.rpad = function(padString, length) {
var str = this;
while (str.length < length)
str = str + padString;
return str;
} |
Using Padding Functions:
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| var str = "5";
alert(str.lpad("0", 5)); //result "00005"
alert(str.rpad("0", 5)); //result "50000" |
OCTOBER 27TH, 2008
By MOHAMMAD SAJJAD HOSSAIN
I am a fan of CodeIgniter for its ease of use. I have developed several ecommerce projects using this “beautiful” framework. While working on my first ecommerce project with CodeIgniter, I faced a problem with URLs. The site was suppose to use both “http” and “https”. But with CodeIgnitor we can define one base URL, which can be either “http” or “https”. Then I came up with an idea and now I am going to share that idea with you.
What I am going to do…
We will create secure version of some functions. For this we will make changes in CodeIgnitor’s URL helper(url_helper.php), Config library (Config.php) and Config (config.php) files. We will be creating secure version of following functions:
- site_url()
- base_url()
- anchor()
- redirect()
Lets’ start…
First we will add the following config element in the config file:
$config['secure_base_url'] = 'https://examples.com';
Then, open the url_helper.php file (system/helpers/url_helper.php) and add the following codes. You may use a separate helper file if you do not want to alter the url_helper.php file.
if( ! function_exists('secure_site_url') )
{
function secure_site_url($uri = '')
{
$CI =& get_instance();
return $CI->config->secure_site_url($uri);
}
}
if( ! function_exists('secure_base_url') )
{
function secure_base_url()
{
$CI =& get_instance();
return $CI->config->slash_item('secure_base_url');
}
}
if ( ! function_exists('secure_anchor'))
{
function secure_anchor($uri = '', $title = '', $attributes = '')
{
$title = (string) $title;
if ( ! is_array($uri))
{
$secure_site_url = ( ! preg_match('!^\w+://! i', $uri)) ? secure_site_url($uri) : $uri;
}
else
{
$secure_site_url = secure_site_url($uri);
}
if ($title == '')
{
$title = $secure_site_url;
}
if ($attributes != '')
{
$attributes = _parse_attributes($attributes);
}
return '<a href="'.$secure_site_url.'">'.$title.'</a>';
}
}
if ( ! function_exists('secure_redirect'))
{
function secure_redirect($uri = '', $method = 'location', $http_response_code = 302)
{
switch($method)
{
case 'refresh' : header("Refresh:0;url=".secure_site_url($uri));
break;
default : header("Location: ".secure_site_url($uri), TRUE, $http_response_code);
break;
}
exit;
}
}Now, add the following code in Config.php file (system/libraries/Config.php):
function secure_site_url($uri = '')
{
if (is_array($uri))
{
$uri = implode('/', $uri);
}
if ($uri == '')
{
return $this->slash_item('secure_base_url').$this->item('index_page');
}
else
{
$suffix = ($this->item('url_suffix') == FALSE) ? '' : $this->item('url_suffix');
return $this->slash_item('secure_base_url').$this->slash_item('index_page').preg_replace("|^/*(.+?)/*$|", "\\1", $uri).$suffix;
}
}Now what we have…
Now what we have? We have secured versions of those function. You may now use them as their insecured version. Enjoy coding 
.
