[Chapter 3] Strings (Redis)

Posted 2020-07-12

[email protected]:~$ cd redis-2.8.12

[email protected]:~/redis-2.8.12$ cd src

[email protected]:~/redis-2.8.12/src$ redis-cli

Set

redis 127.0.0.1:6379> get name

"lijie"

redis 127.0.0.1:6379> set name michael

OK

Get

redis 127.0.0.1:6379> get name

"michael"

redis 127.0.0.1:6379> setnx name micahel

(integer) 0

Setnx

redis 127.0.0.1:6379> setnx age 10

(integer) 1

redis 127.0.0.1:6379> setex date 10 2010

OK

redis 127.0.0.1:6379> get date

"2010"

redis 127.0.0.1:6379> get date

(nil)

redis 127.0.0.1:6379> set email [email protected]

OK

redis 127.0.0.1:6379> get email

"[email protected]"

setrange

redis 127.0.0.1:6379> setrange email 8 qq.com

(integer) 18

redis 127.0.0.1:6379> get email

"[email protected]"

mset

redis 127.0.0.1:6379> mset key1 m1 key2 m2

OK

redis 127.0.0.1:6379> get key1

"m1"

redis 127.0.0.1:6379> get key2

"m2"

redis 127.0.0.1:6379> get key2

"m2"

redis 127.0.0.1:6379> get key3

(nil)

msetnx

redis 127.0.0.1:6379> msetnx key4 unisys.com key5 jasson.net key3 m3 key2 m2

(integer) 0

redis 127.0.0.1:6379> get key4

(nil)

redis 127.0.0.1:6379> msetnx key4 unisys.com key5 jasson.net key3 m3

(integer) 1

redis 127.0.0.1:6379> get key1

"m1"

getrange

redis 127.0.0.1:6379> getrange key1 0 1

"m1"

redis 127.0.0.1:6379> getrange key1 0 0

"m"

getset

redis 127.0.0.1:6379> getset key1 20

"m1"

mget

redis 127.0.0.1:6379> mget key1 key2 key3 key4 key5

1) "20"

2) "m2"

3) "m3"

4) "unisys.com"

5) "jasson.net"

incr 

redis 127.0.0.1:6379> incr key6

(integer) 101

redis 127.0.0.1:6379> incr key6

(integer) 102

redis 127.0.0.1:6379> get key6

"102"

incrby 

redis 127.0.0.1:6379> incrby key6 1

(integer) 103

redis 127.0.0.1:6379> incrby key6 2

(integer) 105

redis 127.0.0.1:6379> incrby key6 -2

(integer) 103

decr/decrby 

redis 127.0.0.1:6379> decr key6 1

(error) ERR wrong number of arguments for ‘decr‘ command

redis 127.0.0.1:6379> decr key6

(integer) 102

redis 127.0.0.1:6379> decrby key6 1

(integer) 101

append 

redis 127.0.0.1:6379> get name

"michael"

redis 127.0.0.1:6379> append name .net

(integer) 11

redis 127.0.0.1:6379> get name

"michael.net"

strlen 

redis 127.0.0.1:6379> strlen name

(integer) 11

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