Redis 3: string of storage type

1. single Value assignment: Set a 100 [Assign multiple values: mset a 100 B 200 C 300] 2. single value: Get a [multiple values: mget a B C] 3. the number incrementing by incr A is + 1 on the basis of a, that is, 101 is returned. If the pre-value is 0, 1 is returned. If the pre-value is not an integer, the error "is not an integer... 3.1 decimal decr usage as above decr4. Convention (naming method) object type: Object ID: Object Property User: 100: DS storage user list User: 100 with user ID 100: friends. count stores the number of friends in the friend list with a user ID of 100. add the specified integer incrby set a 100 incrby a 5 get a and return 1056. add the specified floating point number (Double Precision) incrbyfloat set a 100 incrbyfloat a 1.5 get A returns 101.5. 7. append the value to the end of a string (it is better to append it !) Set a li append a bin get a returns Libin 8. strlen gets the string length set a li strlen a returns 2 9. bit operation getbit A 3 get the value of a to convert to binary, what is the binary bit of the 3rd bits (either 0 or 1) setbit A 3 1: After converting the value of a to binary, set the binary bit of 3rd bits to 1 bitcount A to calculate the value of, bitcount a 0 1 The number of binary bits is 1. For example, if the value of a is "ABC ", then 0 1 is the number of bitop or res a bits of A and B in the binary value of "AB ". not