scoping in Ruby

def foo
  1
end

def meth(arg)
  "Arg = #{ arg }"
end

def same_line
  foo = meth foo
  puts foo
end

def different_lines
  tmp = meth foo
  foo = tmp
  puts foo
end

same_line

# => "Arg = "

different_lines

# => "Arg = 1"