Number of subsequences of an array with given function value

module.xml <?xml version=”1.0″?> <config xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:noNamespaceSchemaLocation=”../../../../../lib/internal/Magento/Framework/Module/etc/module.xsd”> <module name=”Magetrend_Custom” schema_version=”2.0.0″ setup_version=”2.0.0″> <sequence> <module name=”Magetrend_Email”/> </sequence> </module> </config> registration.php <?php MagentoFrameworkComponentComponentRegistrar::register( MagentoFrameworkComponentComponentRegistrar::MODULE, ‘Magetrend_Custom’, __DIR__ […]