Does not appear to be a kata issue.

Thank you so much for this example. I was missing this part too. Cause i counted only the first choices.

[ [ 'a', 'c', 'b', 'd', 'e' ],
  [ 'd', 'c', 'a', 'b', 'e' ],
  [ 'e', 'b', 'd', 'a', 'c' ],
  [ 'e', 'a', 'b', 'c', 'd' ],
  [ 'b', 'c', 'e', 'a', 'd' ] ]

• a has 1 first vote
• b has 1
• c has ZERO
• d has 1
• e has 2

Clearly, c with 0 votes has the least first votes so c is eliminated.

a, b and d have less votes than e, sure, but c has even less.

Next step:

[ [ 'a', 'b', 'd', 'e' ],
  [ 'd', 'a', 'b', 'e' ],
  [ 'e', 'b', 'd', 'a' ],
  [ 'e', 'a', 'b', 'd' ],
  [ 'b', 'e', 'a', 'd' ] ]

a, b and d have 1 vote but e has 2:

a, b and d are eliminated.

e is the only one left : e wins the election

Thanks, I had the same question. The description of the kata really needs to be improved.

Unless I'm mistaken, the following voter array:

[ [ 'a', 'c', 'b', 'd', 'e' ],
  [ 'd', 'c', 'a', 'b', 'e' ],
  [ 'e', 'b', 'd', 'a', 'c' ],
  [ 'e', 'a', 'b', 'c', 'd' ],
  [ 'b', 'c', 'e', 'a', 'd' ] ]
[ [ 'c', 'e' ],
  [ 'c', 'e' ],
  [ 'e', 'c' ],
  [ 'e', 'c' ],
  [ 'c', 'e' ] ]
[ [ 'c' ], [ 'c' ], [ 'c' ], [ 'c' ], [ 'c' ] ]

Should reduce correctly to 'c', but the test insists that 'e' is correct by the kata.

As stated by some users, the kata is missing the statement "if a voter is not in any first-preference vote, then remove it from all voting ballots."