The operator can function as a logical or a bitwise and operator &运算符可以作为逻辑或按位“与”运算符。
Bitwise and operator 按位与运算符。
Use the bitwise and operator to determine each bit set in the bitmap that is returned by the permissions function 使用位与( & )运算符确定permissions函数返回的位图中的每个位集。
Make sure you don ' t mistake the boolean and operator , & & ( double ampersand ) for the bitwise and operator & ( single ampersand ) . they are entirely different beasts 确定你没有错误的使用逻辑和操作符& &和位操作符& ,它们是完全不同的。