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R.SETBIT / R64.SETBIT ​

Sets or clears one bit and returns its previous value.

SyntaxR.SETBIT key offset value
64-bitR64.SETBIT key offset value
Time complexityO(1)

Arguments ​

  • key — the bitmap key (created if missing)
  • offset — the bit position (u32 for R., u64 for R64.)
  • value — 1 to set, 0 to clear

Reply ​

Integer: the previous bit value (0 or 1).

Notes ​

  • Setting a bit to 0 on a missing key creates the key with an empty bitmap.

Example ​

bash
127.0.0.1:6379> R.SETBIT k 42 1
(integer) 0
127.0.0.1:6379> R.SETBIT k 42 1
(integer) 1
127.0.0.1:6379> R.SETBIT k 42 0
(integer) 1