After installed Magento 2, got Internal server error due to IfVersion < 2.4

Following .htaccess code is not working in Magento 2

<Files composer.json>
        <IfVersion < 2.4>
            order allow,deny
            deny from all
        </IfVersion>
        <IfVersion >= 2.4>
            Require all denied
        </IfVersion>
    </Files>

Ans.  Just enabled "mod_version" from your server

How to install Postman in Ubuntu 18.04

Step 1 : Download postman from : https://www.getpostman.com/downloads/

Step 2 : Open terminal : #cp -r /home/jaydip/Downloads/Postman/ /usr/local/

Step 3 : #sudo nano /usr/share/applications/Postman.desktop

Step 4 : Paste following text into the terminal screen

[Desktop Entry]
Encoding=UTF-8
Name=Postman
Exec=/usr/local/Postman/app/Postman
Icon=/usr/local/Postman/app/resources/app/assets/icon.png
Terminal=false
Type=Application
Categories=Development;

FYI: Just goto Exec path and check there is Postman available or not?

How to get null attribute product value in magento 1 addAttributeToFilter Filter Query | Where condition

$collection = Mage::getModel('catalog/product')->getCollection()
        ->addAttributeToSelect(['entity_id'])
        ->addAttributeToFilter(
        array(
            array('attribute'=> 'pricegroup','null' => true),
            array('attribute'=> 'pricegroup','eq' => ''),
            array('attribute'=> 'pricegroup','eq' => 'NO FIELD')
        ),
        '',
        'left')
        ->addAttributeToFilter('status', ['eq' => 1]);
echo $collection->getSelect();
echo '<pre>';print_r($collection->getData());exit;

How to upload image file with ajax

jQuery("form#add-group-form").submit(function(e){
        e.preventDefault();
        var formData = new FormData(jQuery(this)[0]);
       
        jQuery.ajax({
            type:"POST",
            url:jQuery(this).attr("action"),
            data:formData,
            processData: false,
            contentType: false,
            dataType: "json",
            success: function(response){
                alert(response);
            }
        });
    });

How to create multidimensional array in jQuery | Javascript

var jaydip = {};
for(var i=0; i < items.length; i++){
   jaydip[items[i]] = items[i]+'123';
}
console.log(jaydip);
alert(JSON.stringify(jaydip));

Re-index primary key in Mysql database table

set @ROW = 0;

UPDATE `visitorhistory` SET `id` = @ROW := @ROW+1 ORDER BY `id` ASC;

How to Eliminate render-blocking JavaScript and CSS on WordPress

https://www.hostinger.in/tutorials/how-to-fix-eliminate-render-blocking-javascript-and-css-in-above-the-fold-content-on-wordpress