回答編集履歴
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テキスト追加
test
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@@ -39,3 +39,111 @@
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```
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- **動作確認用Repl.it:** [https://repl.it/@jun68ykt/Q247619](https://repl.it/@jun68ykt/Q247619)
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### 追記
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もう一案、numpy を使ってみました。
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```python3
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import numpy as np
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LEFT_RIGHT = [
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['左', np.array([0, -1])],
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['右', np.array([0, 1])]
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]
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UP_DOWN = [
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['上', np.array([-1, 0])],
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['下', np.array([1, 0])]
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]
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DIAGONALS = [
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[f'{lr[0]}{ud[0]}', lr[1] + ud[1]]
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for lr in LEFT_RIGHT
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for ud in UP_DOWN
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]
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DIRECTIONS = {e[0]: e[1] for e in [*LEFT_RIGHT, *UP_DOWN, *DIAGONALS]}
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def num_direction(num, grid, direction):
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delta = DIRECTIONS[direction]
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if delta is None:
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return None
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pos = np.array(divmod(num, grid)) + delta
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if(((pos >= 0) * (pos < grid)).sum() == 2):
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return grid * pos[0] + pos[1]
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else:
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return None
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print(num_direction(7, 4, '上')) # => 3
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print(num_direction(2, 4, '上')) # => None
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print(num_direction(15, 4, '上')) # => 11
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print(num_direction(15, 4, '左')) # => 14
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print(num_direction(15, 4, '左上')) # => 10
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print(num_direction(15, 4, '右')) # => None
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print(num_direction(15, 4, '下')) # => None
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print(num_direction(15, 4, '右上')) # => None
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```
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- **動作確認用Repl.it:** [https://repl.it/@jun68ykt/Q2476192](https://repl.it/@jun68ykt/Q2476192)
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