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reversed method applied in DODA #211

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Merged
merged 1 commit into from
Mar 25, 2020
Merged

reversed method applied in DODA #211

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4 changes: 4 additions & 0 deletions pydatastructs/linear_data_structures/arrays.py
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Original file line number Diff line number Diff line change
Expand Up @@ -255,6 +255,10 @@ def delete(self, idx):
def size(self):
return self._size

def __reversed__(self):
for i in range(self._last_pos_filled, -1, -1):
yield self._data[i]

class ArrayForTrees(DynamicOneDimensionalArray):
"""
Utility dynamic array for storing nodes of a tree.
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8 changes: 8 additions & 0 deletions pydatastructs/linear_data_structures/tests/test_arrays.py
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Expand Up @@ -37,3 +37,11 @@ def test_DynamicOneDimensionalArray():
assert A.size == 3
A.fill(4)
assert A._data == [4, 4, 4]
b = DynamicOneDimensionalArray(int, 0)
b.append(1)
b.append(2)
b.append(3)
b.append(4)
b.append(5)
assert b._data == [1, 2, 3, 4, 5, None, None]
assert list(reversed(b)) == [5, 4, 3, 2, 1]