I am passing the reference of name to *mod_name*, I modify the referenced object from within the method but the change is not visible outside of the method, if I am referring to the same object from all locations how come the value is different depending on where I reference it?

name = "Jason"

puts name.object_id      #19827274

def mod_name(name)
  puts name.object_id    #19827274
  name = "JasonB"
end

puts name.object_id      #19827274

puts name                #Jason

String might be a bad example, but I get the same result even if I use a Fixnum.