Algorithm - How to delete duplicate elements in a list efficiently?

Question

There is a list L. It contains elements of arbitrary type each. How to delete all duplicate elements in such list efficiently? ORDE

Answer 1

In Python

>>> L = [2, 1, 4, 3, 5, 1, 2, 1, 1, 6, 5]
>>> a=[]
>>> for i in L:
...   if not i in a:
...     a.append(i)
...
>>> print a
[2, 1, 4, 3, 5, 6]
>>>