David Lowes

Implement Facebook's Like Function

Codewards Question

Implement a function likes :: [String] -> String, which must take in input array, containing the names of people who like an item. It must return the display text as shown in the examples:

likes [] must be ==> "no one likes this"
likes ["Peter"] must be ==> "Peter likes this"
likes ["Jacob", "Alex"] must be ==> "Jacob and Alex like this"
likes ["Max", "John", "Mark"] must be ==> "Max, John and Mark like this"
likes ["Alex", "Jacob", "Mark", "Max"] must be ==> "Alex, Jacob and 2 others like this"
For more than 4 names, the number in and 2 others simply increases.

Solution

function likes(names) {
  if (names.length === 0) {
  	return "no one likes this";
  } else if (names.length === 1){
  	return names[0] + " likes this";
  } else if (names.length === 2) {
  	return names[0] + " and " + names[1] + " like this";
  } else if (names.length === 3) {
  	return names[0] + ", " + names[1] + " and " + names[2] + " like this";
  } else if (names.length > 3) {
  	return names[0] + ", " + names[1] + " and " + (names.length-2) + " others like this";
  }
}