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GETBIT key offset

相关命令

Available since 2.2.0.

时间复杂度： O(1)

Returns the bit value at offset in the string value stored at key.

When offset is beyond the string length, the string is assumed to be a contiguous space with 0 bits. When key does not exist it is assumed to be an empty string, so offset is always out of range and the value is also assumed to be a contiguous space with 0 bits.

返回值

Integer reply: the bit value stored at offset.

例子

redis> SETBIT mykey 7 1 

  1. (integer) 0

redis> GETBIT mykey 0 

  1. (integer) 0

redis> GETBIT mykey 7 

  1. (integer) 1

redis> GETBIT mykey 100 

  1. (integer) 0
redis>

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