逻辑与按位

Question

What the different between logical operators and , or and bitwise analogs & , | in usage?各种解决方案在效率上有什么区别吗？

原文由 I159 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

逻辑运算符对逻辑值进行运算，而按位运算符对整数位进行运算。停止考虑性能，并根据它们的用途使用它们。

 if x and y: # logical operation
   ...
z = z & 0xFF # bitwise operation

原文由 Cat Plus Plus 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

Bitwise = 逐位检查

# Example

Bitwise AND: 1011 & 0101 = 0001
Bitwise OR: 1011 | 0101 = 1111

Logical = 逻辑检查或者换句话说，你可以说 True/False 检查

# Example

# both are non-zero so the result is True
Logical AND: 1011 && 0101 = 1 (True)

# one number is zero so the result is False
Logical AND: 1011 && 0000 = 0 (False)

# one number is non-zero so the result is non-zero which is True
Logical OR: 1011 || 0000 = 1 (True)

# both numbers are zero so the result is zero which is False
Logical OR: 0000 || 0000 = 0 (False)

原文由 Abu Shoeb 发布，翻译遵循 CC BY-SA 4.0 许可协议