likes.js

function likes(names) {
  switch(names.length){
    case 0: return 'no one likes this'; break;
    case 1: return `${names[0]} likes this`; break;
    case 2: return `${names[0]} and ${names[1]} like this`; break;
    case 3: return `${names[0]}, ${names[1]} and ${names[2]} like this`; break;
  }
  if(names.length > 3)
    return `${names[0]}, ${names[1]} and ${names.length - 2} others like this`
}


// - Test Cases -
likes([])// 'no one likes this');
likes(['Peter'])// 'Peter likes this');
likes(['Jacob', 'Alex'])// 'Jacob and Alex like this');
likes(['Max', 'John', 'Mark'])// 'Max, John and Mark like this');
likes(['Alex', 'Jacob', 'Mark', 'Max'])// 'Alex, Jacob and 2 others like this');