Simplify some code with null coalesce operator

Author: javiereguiluz

Command/AssetsInstallCommand.php

@@ -278,10 +278,6 @@ private function getPublicDirectory(ContainerInterface $container): string
 
         $composerConfig = json_decode(file_get_contents($composerFilePath), true);
 
-        if (isset($composerConfig['extra']['public-dir'])) {
-            return $composerConfig['extra']['public-dir'];
-        }
-
-        return $defaultPublicDir;
+        return $composerConfig['extra']['public-dir'] ?? $defaultPublicDir;
     }
 }

Console/Descriptor/JsonDescriptor.php

@@ -134,7 +134,7 @@ protected function describeContainerAlias(Alias $alias, array $options = [], Con
 
     protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = [])
     {
-        $this->writeData($this->getEventDispatcherListenersData($eventDispatcher, \array_key_exists('event', $options) ? $options['event'] : null), $options);
+        $this->writeData($this->getEventDispatcherListenersData($eventDispatcher, $options['event'] ?? null), $options);
     }
 
     protected function describeCallable($callable, array $options = [])

Console/Descriptor/MarkdownDescriptor.php

@@ -258,7 +258,7 @@ protected function describeContainerEnvVars(array $envs, array $options = [])
 
     protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = [])
     {
-        $event = \array_key_exists('event', $options) ? $options['event'] : null;
+        $event = $options['event'] ?? null;
 
         $title = 'Registered listeners';
         if (null !== $event) {

Console/Descriptor/TextDescriptor.php

@@ -442,7 +442,7 @@ protected function describeContainerEnvVars(array $envs, array $options = [])
 
     protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = [])
     {
-        $event = \array_key_exists('event', $options) ? $options['event'] : null;
+        $event = $options['event'] ?? null;
 
         if (null !== $event) {
             $title = sprintf('Registered Listeners for "%s" Event', $event);

Console/Descriptor/XmlDescriptor.php

@@ -88,7 +88,7 @@ protected function describeContainerAlias(Alias $alias, array $options = [], Con
 
     protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = [])
     {
-        $this->writeDocument($this->getEventDispatcherListenersDocument($eventDispatcher, \array_key_exists('event', $options) ? $options['event'] : null));
+        $this->writeDocument($this->getEventDispatcherListenersDocument($eventDispatcher, $options['event'] ?? null));
     }
 
     protected function describeCallable($callable, array $options = [])

Controller/ControllerTrait.php

@@ -144,7 +144,7 @@ protected function json($data, int $status = 200, array $headers = [], array $co
     protected function file($file, string $fileName = null, string $disposition = ResponseHeaderBag::DISPOSITION_ATTACHMENT): BinaryFileResponse
     {
         $response = new BinaryFileResponse($file);
-        $response->setContentDisposition($disposition, null === $fileName ? $response->getFile()->getFilename() : $fileName);
+        $response->setContentDisposition($disposition, $fileName ?? $response->getFile()->getFilename());
 
         return $response;
     }