pub async fn scard<K>(&mut self, key: &K) -> Result<isize>
    where
        K: AsRef<[u8]>,
    {
        let command = Command::new("SCARD").arg(&key);
        Ok(self.run_command(command).await?.unwrap_integer())
    }
///Get the number of members in the set at `key`.
Get the number of members in the set at `key`.
Get the number of members in the set at ` key ` .
pub async fn scard<K>(&mut self, key: &K) -> Result<isize>
    where
        K: AsRef<[u8]>,
    {
        let command = Command::new("SCARD").arg(&key);
        Ok(self.run_command(command).await?.unwrap_integer())
    }
pub async fn scard < K > ( & mut self , key : & K ) -> Result < isize > where K : AsRef < [ u8 ] > , { let command = Command :: new ( " " ) . arg ( & key ) ; Ok ( self . run_command ( command ) . await ? . unwrap_integer ( ) ) }
Get the number of members in the set at `key`.
Get the number of members in the set at ` key ` .
&mut self
key
&K
&mut self
key
&K