fxbit_is_set

fxbit_is_set(fx, i)
      

Return true if the ith bit of the fixnum fx is set, otherwise return false.

The index i must be nonnegative. It is taken as a zero-based index for the bits in the two's complement representation of fx, with the sign bit virtually replicated an infinite number of positions to the left.

Examples:

fxbit_is_set(5, 0)
// true
fxbit_is_set(5, 1)
// false
fxbit_is_set(5, 2)
// true
fxbit_is_set(-5, 8)
// true
fxbit_is_set(5, 8)
// false
      

Also see:

Core Module Index | Contents