Fixes after code review

Author: andrewbess

lib/internal/Magento/Framework/Code/Reader/NamespaceResolver.php

@@ -112,7 +112,7 @@ function ($token) {
                                 T_NAME_QUALIFIED => T_NAME_QUALIFIED,
                                 T_NAME_FULLY_QUALIFIED => T_NAME_FULLY_QUALIFIED
                             ];
-                            if (isset($token[0]) && \array_key_exists($token[0], $whitelist)) {
+                            if (isset($token[0], $whitelist[$token[0]])) {
                                 return true;
                             }
                             return false;

lib/internal/Magento/Framework/DB/AbstractMapper.php

@@ -126,7 +126,7 @@ public function map(CriteriaInterface $criteria)
                 if (!is_array($value)) {
                     throw new \InvalidArgumentException('Wrong type of argument, expecting array for '. $mapperMethod);
                 }
-                call_user_func_array([$this, $mapperMethod], array_values($value));
+                call_user_func_array([$this, $mapperMethod], ...[$value]);
             }
         }
         return $this->select;
@@ -395,8 +395,9 @@ protected function getConditionFieldName($fieldName)
      * Hook for operations before rendering filters
      *
      * @return void
+     * phpcs:ignore Magento2.CodeAnalysis.EmptyBlock
      */
-    protected function renderFiltersBefore() //phpcs:ignore Magento2.CodeAnalysis.EmptyBlock
+    protected function renderFiltersBefore()
     {
     }
 

lib/internal/Magento/Framework/View/Layout/Generator/Block.php

@@ -299,7 +299,7 @@ protected function generateAction($block, $methodName, $actionArguments)
         $profilerKey = 'BLOCK_ACTION:' . $block->getNameInLayout() . '>' . $methodName;
         \Magento\Framework\Profiler::start($profilerKey);
         $args = $this->evaluateArguments($actionArguments);
-        call_user_func_array([$block, $methodName], array_values($args));
+        call_user_func_array([$block, $methodName], ...[$args]);
         \Magento\Framework\Profiler::stop($profilerKey);
     }
 

setup/src/Magento/Setup/Module/Di/Code/Reader/FileScanner.php

@@ -207,7 +207,7 @@ protected function scan()
                 if ($this->tokenType === T_WHITESPACE) {
                     goto SCANNER_NAMESPACE_CONTINUE;
                 }
-                if (\array_key_exists($this->tokenType, $namespaceContentTokenTypes)) {
+                if (isset($namespaceContentTokenTypes[$this->tokenType])) {
                     $infos[$infoIndex]['namespace'] .= $tokenContent;
                 }