diff --git a/10-seq-hacking/vector_v4.py b/10-seq-hacking/vector_v4.py
@@ -160,6 +160,7 @@ class Vector:

    def __init__(self, components):
        self._components = array(self.typecode, components)

    def __iter__(self):
        return iter(self._components)
@@ -177,12 +178,17 @@ def __bytes__(self):
                bytes(self._components))

    def __eq__(self, other):
-        return (len(self) == len(other) and
                all(a == b for a, b in zip(self, other)))

    def __hash__(self):
        hashes = (hash(x) for x in self)
-        return functools.reduce(operator.xor, hashes, 0)

    def __abs__(self):
        return math.sqrt(sum(x * x for x in self))