Unique In Order Python Codewars

 

Implement the function unique_in_order which takes as argument a sequence and returns a list of items without any elements with the same value next to each other and preserving the original order of elements.

For example:

unique_in_order('AAAABBBCCDAABBB') == ['A', 'B', 'C', 'D', 'A', 'B']
unique_in_order('ABBCcAD')         == ['A', 'B', 'C', 'c', 'A', 'D']
unique_in_order([1,2,2,3,3])       == [1,2,3]

def unique_in_order(iterable):
    is_in = ''
    res = []
    for char in iterable:
        if char != is_in:
            is_in = char
            res.append(char)
    return res

def unique_in_order(iterable):
    r = []
    for x in iterable:
        x in r[-1:] or r.append(x)
    return r

 print(unique_in_order('AAAABBBCCDAABBB')) 

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