joining list elements

[Johannes Zellner]

Hi again,

how do I join list elements ?

e.g. I want [[1, 2, 3], [4, 5, 6]] --> [1, 2, 3, 4, 5, 6]
     and    [[1, 2, 3],  4, 5, 6 ] --> [1, 2, 3, 4, 5, 6]
     and    [1, 2, 3], 4 --> [1, 2, 3, 4]

any help much appreciated!

-- 
   Johannes