Django I Migrate Error: TypeError expected string or bytes-like object "TypeError: expected string or bytes-like object", says the value we have provided for updating the field for the model is not supported. So to resolve this issue …

SQL | difference between BETWEEN and IN operator The BETWEEN operator selects all records between the given range whereas IN operator selects all matching records given with the WHERE clause.   BETWEEN operator The Between operator in …

 PHP | implode() and explode() function implode() function is use to convert an array into a string where as explode() function is used to convert an string into an array   implode() The implode() function …

PHP | Case Sensitive In PHP, keywords (e.g. if, else, while, echo, etc.), classes, functions, and user-defined functions are not case-sensitive but all variable names are case-sensitive.   If you defined function name in lowercase, …

HTML | Make an anchor tag to do nothing | href="javascript:void(0);" To prevent reloading a page when a link clicked is something like preventing the default behavior of an element. It can be achieved by providing …

CodeIgniter | What is helpers | Load helper file Helper is simply a collection of function in a particular category which helps you with tasks. The helper file can be loaded in controller constructor, some …

Jquery | Auto Focus On Next Input Field The jquery code for autofocus on the next text input field. $(".input-key").keyup(function() { if ($(this).val().length == $(this).attr("maxlength")) { $(this).next('.input-key').focus(); } }); Let's go through the above jquery …

PHP-MYSQL |  mysqli_fetch_assoc() VS  mysqli_fetch_array() mysqli_fetch_assoc() function fetch a result row as an associative array where as mysqli_fetch_array() function fetch a result row as an associative array, a numeric array, or both.       mysqli_fetch_assoc() The mysqli_fetch_assoc() …

PHP | Add numbers of days to a date Simple and easy way to add some days in a given date using strtotime() function. <?php $p_date = "2019-01-10"; echo date('Y-m-d', strtotime($p_date . ' + 1 days')); echo …

PHP | Stop the execution of php script | exit() funtion By using exit() function we can stop the execution of php script.   <?php $a = 10; $b = 20; $c = $a+$b; exit(); …

Django rest framework  authentication error “ TypeError: 'type' object is not iterable ” This error comes because "authentication_classes" expecting an iterable(list/tuple) but somehow it is getting something else. So it needs to check a few …

$name and $$name both are variables but with a single difference that is $name is just a normal php variable where as $$name is known as reference variable. It allow you to use $name variable's …

JQuery | TinyMCE | Clear TINYMCE editor  There is a method called setContent() in TINTMCE which you can use to reset/clear the TINTMCE editor. <script> // if one editor existing in your page. tinyMCE.activeEditor.setContent(''); </script> …

Codeigniter | Set timezone To set default timezone in Codeigniter, you can add the date_default_timezone_set() function in your application/config.php or index.php file. date_default_timezone_set('your timezone');   <?php // India timezone date_default_timezone_set('Asia/Kolkata'); ?>  

PHP | Combine two strings There are several ways to concatenate two strings in PHP. Use the concatenation operator [.] and [.=] There are two string operators that are used for concatenation. [.]:  Concatenation operator …