Remove repeating variables and replacing them

Ex: In the array

x=[4 4 5 5 1 2 2 3 3 3 4 5]

, i want to eliminate all repeating elements and retain non-repeating elements

(4, 5,1,2,3,4,5)

i.e., If

x=[4 4 5 5 1 2 2 3 3 3 4 5]

, answer should be

x=[4 5 1 2 3 4 5]

Answer 1

[Bruno Luong]

x = x([true diff(x)~=0])