best is also the best of the best

gistfile1.js

var best = function (array) {
  if (!array.reduce) return array;

  return array.reduce(function (p, c) {
      if (c.reduce) {
        return (p > best(c)) ? p : best(c);
      }
      return (p > c) ? p : c;
    }, -Infinity);
};

var equals = function (a, b) {
  var equal = (a === b);
  console.log(a, b, equal);
  return equal;
};

equals('z', best(['a','b','z','c']));
equals(6, best(6));
equals(4, best([1,2,3,4,1]));
equals(8, best([[1,2,3,4,1],[1,2,3,8,1],[1,2,3,4,1],[1,2,3,4,1],[1,2,3,4,1]]));
equals(12, best([[1,2,3,4,1],[1,[1,12,3,4,1],3,8,1],[1,2,3,4,1],[1,2,3,4,1],[1,2,3,4,1]]));
equals(-2, best([-5,-2,-3]));
equals(20, best([[20,2,3,4,1],[1,[1,12,3,4,1],3,8,1],[1,2,3,4,1],[1,2,3,4,1],[1,2,3,4,1]]));