fizzbuzz w/ nested ternaries

gistfile1.txt

function fizzbuzz(len){
    var res = []

    for ( var i = 1; i <= len; i += 1 ) res.push(fizz_or_buzz(i))
    
    return res

    function fizz_or_buzz(num){
        return num % 3 == 0 && num % 5 == 0 ? "fizzbuzz"
             : num % 3 == 0                 ? "fizz"
             : num % 5 == 0                 ? "buzz"
             : /* otherwise */                 num
    }

}