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Fix remove_duplicates function to handle binary values #918

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Fix remove_duplicates function to handle binary values #918

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fbdb60f
fix: remove_duplicates function when dealing with binary values
ca20110820 Apr 14, 2024
7462c54
docs: add docstring for remove_duplicates function
ca20110820 Apr 14, 2024
123ef62
fix: fixed test_summarize_ranges method in test_array
ca20110820 Apr 14, 2024
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25 changes: 20 additions & 5 deletions algorithms/arrays/remove_duplicates.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,15 +4,30 @@

For example:

Input: [1, 1 ,1 ,2 ,2 ,3 ,4 ,4 ,"hey", "hey", "hello", True, True]
Output: [1, 2, 3, 4, 'hey', 'hello']
Input: [1, 1 ,1 ,2 ,2 ,3 ,4 ,4 ,"hey", "hey", "hello", True, True, False]
Output: [1, 2, 3, 4, 'hey', 'hello', True, False]
"""


def remove_duplicates(array):
new_array = []
"""Removes duplicates from the input array while preserving the order of the first occurrence of each distinct item.

Args:
array (list): The input array containing elements with potential duplicates.

Returns:
list: A new array with duplicates removed, maintaining the order of the first occurrence of each item.

Examples:
>>> remove_duplicates([1, 1, 1, 2, 2, 3, 4, 4, "hey", "hey", "hello", True, True, False])
[1, 2, 3, 4, 'hey', 'hello', True, False]
"""
new_array = [] # Preserve order of first distinct item
seen = set() # Track the unique items

for item in array:
if item not in new_array:
if all([item is not elem for elem in seen]):
new_array.append(item)
seen.add(item)

return new_array
return new_array
27 changes: 17 additions & 10 deletions tests/test_array.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@
missing_ranges,
move_zeros,
plus_one_v1, plus_one_v2, plus_one_v3,
remove_duplicates
remove_duplicates,
rotate_v1, rotate_v2, rotate_v3,
summarize_ranges,
three_sum,
Expand Down Expand Up @@ -299,14 +299,21 @@ def test_plus_one_v3(self):
self.assertListEqual(plus_one_v3([9, 9, 9, 9]),
[1, 0, 0, 0, 0])

class TestRemoveDuplicate(unittest.TestCase):

class TestRemoveDuplicate(unittest.TestCase):
def test_remove_duplicates(self):
self.assertListEqual(remove_duplicates([1,1,1,2,2,2,3,3,4,4,5,6,7,7,7,8,8,9,10,10]))
self.assertListEqual(remove_duplicates(["hey", "hello", "hello", "car", "house", "house"]))
self.assertListEqual(remove_duplicates([True, True, False, True, False, None, None]))
self.assertListEqual(remove_duplicates([1,1,"hello", "hello", True, False, False]))
self.assertListEqual(remove_duplicates([1, "hello", True, False]))
self.assertListEqual(remove_duplicates([1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 5, 6, 7, 7, 7, 8, 8, 9, 10, 10]),
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
self.assertListEqual(remove_duplicates(["hey", "hello", "hello", "car", "house", "house"]),
["hey", "hello", "car", "house"])
self.assertListEqual(remove_duplicates([True, True, False, True, False, None, None]),
[True, False, None])
self.assertListEqual(remove_duplicates([1, 1, "hello", "hello", True, False, False]),
[1, "hello", True, False])
self.assertListEqual(remove_duplicates([1, "hello", True, False]),
[1, "hello", True, False])
self.assertListEqual(remove_duplicates([False, True, False, True]),
[False, True])


class TestRotateArray(unittest.TestCase):
Expand Down Expand Up @@ -347,11 +354,11 @@ class TestSummaryRanges(unittest.TestCase):
def test_summarize_ranges(self):

self.assertListEqual(summarize_ranges([0, 1, 2, 4, 5, 7]),
[(0, 2), (4, 5), (7, 7)])
['0-2', '4-5', '7'])
self.assertListEqual(summarize_ranges([-5, -4, -3, 1, 2, 4, 5, 6]),
[(-5, -3), (1, 2), (4, 6)])
['-5--3', '1-2', '4-6'])
self.assertListEqual(summarize_ranges([-2, -1, 0, 1, 2]),
[(-2, 2)])
['-2-2'])


class TestThreeSum(unittest.TestCase):
Expand Down