andreaschrist27

select name from employees where id NOT IN (select managerId from employees where managerID IS NOT NULL)

andreaschrist27

select count(*) from students where firstName = 'John'

andreaschrist27

<?php
class Pipeline
{
    public static function make_pipeline(...$funcs)
    {
        return function($arg) use ($funcs)
        {
            foreach ($funcs as $func)
            {
                if(!isset($output)) 

andreaschrist27

<?php
class Palindrome
{
    public static function isPalindrome($word)
    {
         $wordCase = self::ignoreCase($word);
        
         if($wordCase == strrev($wordCase))
         {
             return true;