Friend or Foe?

kata

Make a program that filters a list of strings and returns a list with only your friends name in it.

If a name has exactly 4 letters in it, you can be sure that it has to be a friend of yours! Otherwise, you can be sure he's not...

Ex: Input = ["Ryan", "Kieran", "Jason", "Yous"], Output = ["Ryan", "Yous"]

i.e.

friend ["Ryan", "Kieran", "Mark"] `shouldBe` ["Ryan", "Mark"]
Note: keep the original order of the names in the output.

my answer

function friend(friends){
  //your code here
  var result = friends.filter(frien => frien.length == 4)
  return result
}

best answer

function friend(friends){
  return friends.filter(n => n.length === 4)
}