GETBIT

GETBIT key offset

Available since:

2.2.0

Time complexity:

O(1)

ACL categories:

@read, @bitmap, @fast,

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.

Examples

redis> SETBIT mykey 7 1
(integer) 0
redis> GETBIT mykey 0
(integer) 1
redis> GETBIT mykey 7
""
redis> SETBIT mykey 7 1
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> GETBIT mykey 0
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> GETBIT mykey 7
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> GETBIT mykey 100
Cannot destructure property 'error' of 'replies[i]' as it is undefined.

RESP2/RESP3 Reply

The bit value stored at offset, one of the following:

• Integer reply: 0.
• Integer reply: 1.