Redis 4: unordered collection of Storage types

 1  . Sadd num a B C add three ABC elements to the num set  2  . Srem num B: delete Element B from the num set  3  . Smembers num get all elements in the num set  4  . Sismember num C judge whether C exists in the num set ================================== 5  . Operation sadd num a B c sadd num2 a B c d difference set (calculate the portion on the left more than the portion on the right): sdiff num  2 Returns the null sdiff num2 num and returns the intersection of D (the part that is simultaneously on the left and right) sinter num num2 returns a B c Union (merges the elements on both sides of the left and right without duplicates) sunion num num2 returns a B c d ==================================== 6  . Scard num gets the number of elements in the num set.  7  . Sdiffstore num3 num2 num: place the result of the difference set between num and num2 to the num3 set.  8  The intersection of. sinterstore and above  9  . Sunionstore same as above  10 . Srandmember num count random acquisition of Random Elements in count num
11. spop num randomly pops up an element from the num set.