redis of the type commonly used Methods List

format:

存---LPUSH key value [value ...]

取--LRANGE key start stop

lpush key value [value ...] one or more values are inserted into the head of the list

127.0.0.1:6379> lpush plf panlifu 
(integer) 1
127.0.0.1:6379> lpush plf lt
(integer) 2
127.0.0.1:6379> lpush plf xs
(integer) 3
127.0.0.1:6379> lpush plf cd
(integer) 4
127.0.0.1:6379> lrange plf 0 1
1) "cd"
2) "xs"
127.0.0.1:6379> lrange plf 0 3
1) "cd"
2) "xs"
3) "lt"
4) "panlifu"

lrange key start stop get a list of the elements within the specified range

127.0.0.1:6379> lpush plf panlifu 
(integer) 1
127.0.0.1:6379> lpush plf lt
(integer) 2
127.0.0.1:6379> lpush plf xs
(integer) 3
127.0.0.1:6379> lpush plf cd
(integer) 4
127.0.0.1:6379> lrange plf 0 1
1) "cd"
2) "xs"
127.0.0.1:6379> lrange plf 0 3
1) "cd"
2) "xs"
3) "lt"
4) "panlifu"

The first element blpop key [key ...] timeout and get out of the list, if the list is not a list of the elements will block until a timeout or wait until the pop-up element can be found
```
127.0.0.1:6379> blpop plf  timeout 1
1) "plf"
2) "cd"
127.0.0.1:6379> lrange plf 0 4
1) "xs"
2) "lt"
3) "panlifu"
```
brpop key [key ...] timeout and get out of the last element of the list, if the list is not a list of the elements will block until a timeout or wait until the discovery may pop elements.
```
127.0.0.1:6379> lrange plf 0 4
1) "xs"
2) "lt"
3) "panlifu"
127.0.0.1:6379> brpop plf timeout 1
1) "plf"
2) "panlifu"
127.0.0.1:6379> lrange plf 0 4
1) "xs"
2) "lt"
```
brpoplpush source destination timeout pop a value from the list, the pop-up element into another list and returns it; if the list does not list element will block until the wait timeout, or pop-up element may be found so far. ?
```
127.0.0.1:6379> brpoplpush plf lt timeout 10
(error) ERR wrong number of arguments for 'brpoplpush' command
127.0.0.1:6379> 
```

lindex key index to obtain the list of elements by index

127.0.0.1:6379> lrange plf 0 3
1) "xs"
2) "lt"
127.0.0.1:6379> lindex plf 1
"lt"
127.0.0.1:6379> lindex plf 0
"xs"
127.0.0.1:6379>

linsert key BEFORE | AFTER pivot value insert elements in the list of elements before or after


127.0.0.1:6379> lrange plf 0 3
1) "xs"
2) "lt"
127.0.0.1:6379> linsert plf after lt hehe
(integer) 3
127.0.0.1:6379> lrange plf 0 3
1) "xs"
2) "lt"
3) "hehe"
127.0.0.1:6379> linsert plf before lt hehe
(integer) 4
127.0.0.1:6379> lrange plf 0 3
1) "xs"
2) "hehe"
3) "lt"
4) "hehe"

llen key to get a list length

127.0.0.1:6379> lrange plf 0 3
1) "xs"
2) "hehe"
3) "lt"
4) "hehe"
127.0.0.1:6379> llen plf
(integer) 4

The first element lpop key removed and get a list of

127.0.0.1:6379> lrange plf 0 3
1) "xs"
2) "hehe"
3) "lt"
4) "hehe"
127.0.0.1:6379> llen plf
(integer) 4
127.0.0.1:6379> lpop plf
"xs"
127.0.0.1:6379> lrange plf 0 3
1) "hehe"
2) "lt"
3) "hehe"

lpushx key value header will be inserted into a value list already exists

```shell
127.0.0.1:6379> lpushx hehe hello
(error) WRONGTYPE Operation against a key holding the wrong kind of value
127.0.0.1:6379> lpushx plf hello
(integer) 4
127.0.0.1:6379> lrange plf 0 5
1) "hello"
2) "hehe"
3) "lt"
4) "hehe"
```

lrem key count value remove list elements, count the number of times

127.0.0.1:6379> lrange plf 0 5
1) "hello"
2) "hehe"
3) "lt"
4) "hehe"
127.0.0.1:6379> lrem plf 2 hehe
(integer) 2
127.0.0.1:6379> lrange plf 0 5
1) "hello"
2) "lt"

lset key index value by setting the index value of the list element

127.0.0.1:6379> lrange plf 0 5
1) "hello"
2) "lt"
127.0.0.1:6379> lset plf 0 gunkai
OK
127.0.0.1:6379> lrange plf 0 5
1) "gunkai"
2) "lt"

ltrim key start stop for a list of trim (trim), that is, make a list of only the specified retention element within the range of elements within the range of not specified will be deleted.

127.0.0.1:6379> lrange plf 0 10
 1) "gunkai"
 2) "lt"
 3) "1"
 4) "2"
 5) "3"
 6) "4"
 7) "5"
 8) "6"
 9) "7"
10) "8"
127.0.0.1:6379> ltrim plf 0 3
OK
127.0.0.1:6379> lrange plf 0 10
1) "gunkai"
2) "lt"
3) "1"
4) "2"

rpop key removes the last element of the list, the return value of the element removed.

127.0.0.1:6379> lrange plf 0 10
1) "gunkai"
2) "lt"
3) "1"
4) "2"
127.0.0.1:6379> rpop plf
"2"
127.0.0.1:6379> lrange plf 0 10
1) "gunkai"
2) "lt"
3) "1"

rpoplpush source destination removes the last element of the list, and adds the element to another list and returns

127.0.0.1:6379> lrange plf 0 10
1) "gunkai"
2) "lt"
3) "1"
127.0.0.1:6379> rpoplpush plf lt
"1"
127.0.0.1:6379> lrange plf 0 10
1) "gunkai"
2) "lt"
127.0.0.1:6379> lrange lt 0 10
 1) "1"

rpush key value [value ...] to add one or more values in a list

127.0.0.1:6379> lrange plf 0 5
1) "gunkai"
2) "lt"
127.0.0.1:6379> rpush plf  1 2 3 4 5 6 7 8
(integer) 10
127.0.0.1:6379> lrange plf 0 10
 1) "gunkai"
 2) "lt"
 3) "1"
 4) "2"
 5) "3"
 6) "4"
 7) "5"
 8) "6"
 9) "7"
10) "8"

rpushx key value adding value to an existing list

127.0.0.1:6379> rpushx test_key 1
(integer) 0
127.0.0.1:6379> lrange test_key 0 1
(empty list or set)

Summary: ending x key is to determine whether the presence, absence can not be set, to set presence. R represents the start with a plurality of values can be added simultaneously