Array by Reference?

arrays_derefed

v = [ 1, 2, 3 ] 
b = v
b = [ 2, 3, 4 ] 
puts v

# expected output [ 2, 3, 4] actual output [ 1, 2, 3]
# in this case it appears that the [ ] operator does not overwrite the values in the
# array v as I would expect

v = [ 2, 5, 3 ]  
b = v 
b.sort!
puts v

# output is  [ 2, 3, 5 ]