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✨ Add convert to numeric stream operation #54

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merged 2 commits into from
Jul 25, 2023
Merged

✨ Add convert to numeric stream operation #54

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6afd53d
:sparkles: Add convert to numeric stream operation
garlontas Jul 25, 2023
d85a443
:rotating_light: Fix deepsource issue (FLK-D200)
garlontas Jul 25, 2023
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4 changes: 4 additions & 0 deletions pystreamapi/_streams/__base_stream.py
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Original file line number Diff line number Diff line change
Expand Up @@ -251,6 +251,10 @@ def __map_to_str(self):
"""Converts the stream to strings."""
self._map(str)

def numeric(self) -> NumericBaseStream:
"""Returns a numeric stream. If the stream is already numeric, it is returned."""
return self._to_numeric_stream()

@_operation
def parallel(self) -> 'ParallelStream[K]':
"""Returns a parallel stream. If the stream is already parallel, it is returned."""
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8 changes: 8 additions & 0 deletions tests/test_stream_implementation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,14 @@ def test_map_to_str(self):
result = self.stream([1, 2, 3, 9]).map_to_str().to_list()
self.assertListEqual(result, ["1", "2", "3", "9"])

def test_convert_to_numeric_stream(self):
result = self.stream([1, 2, 3, 9]).numeric()
self.assertTrue(isinstance(result, NumericBaseStream))

def test_convert_to_numeric_stream_is_already_numeric(self):
result = self.stream([1.0, 2.0, 3.0, 9.0]).numeric()
self.assertTrue(isinstance(result, NumericBaseStream))

def test_flat_map(self):
result = self.stream([1, 2, 3, 9]).flat_map(lambda x: self.stream([x, x])).to_list()
self.assertListEqual(result, [1, 1, 2, 2, 3, 3, 9, 9])
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