()
return Fn('Dup', lambda x: (x, x), n_out=2)
Duplicates (copies) the top element on the data stack.
Duplicates (copies) the top element on the data stack.
Duplicates ( copies ) the top element on the data stack .
def Dup():
  """Duplicates (copies) the top element on the data stack."""
  return Fn('Dup', lambda x: (x, x), n_out=2)
def Dup ( ) : return Fn ( 'Dup' , lambda x : ( x , x ) , n_out = 2 )