New data structure —— String

[qishenonly]

We need a new data structure, String, to extend the database's key-value storage structure.
We need to build some instructions into String to make it more complete.
If you are interested in extending the String data structure, you can comment below on the issue id you would like to try and we will assign it to you.

id	issue	method	describtion	people	process
1	String method Set	Set key value ttl	Set the value of the specified key to a string. The parameters include the key, value, and expiration time	@qishenonly	finish
2	String method Get	Get key	Gets the value of the specified key.	@qishenonly	finish
3	String method Del	Del key	Deletes the specified key.	@qishenonly	finish
4	String method Type	Type key	Gets the type of the key	@qishenonly	finish
5	String method StrLen	StrLen key	Gets the length of the value for the specified key.	@qishenonly	finish
6	String method GetSet	GetSet key value ttl	Sets the new value of the specified key and returns the old value. Parameters include key, value, and expiration time	@qishenonly	finish
7	String method MSet	MSet key1 value1 [key2 value2 ...]	Set multiple key pairs at the same time.	@wangchenguang123
8	String method MSetNX	MSetNX key1 value1 [key2 value2 ...]	If none of the specified keys exists, set multiple key pairs.	@wangchenguang123
9	String method MGet	MGet key [key ...]	Gets the value of multiple keys simultaneously.	@wangchenguang123
10	String method Append	Append key value	Appends the specified string to the end of the value of the specified key.	@qishenonly	finish
11	String method SetEX	SetEX key seconds value	Sets the value of the specified key and specifies the expiration time in seconds.	@qishenonly	finish
12	String method PSetEX	PSetEX key milliseconds value	Sets the value of the specified key and specifies the expiration time in milliseconds.	@qishenonly	finish
13	String method Incr	Incr key ttl	Increase the value of a specified key by 1. If the key does not exist, it is created with an initial value of 1.	@qishenonly	finish
14	String method IncrBy	IncrBy key amount ttl	Increase the value of a specified key by a given amount. If the key does not exist, it is created with an initial value of the amount.	@qishenonly	finish
15	String method IncrByFloat	IncrByFloat key amount ttl	Increase the float value of a specified key by a given amount. If the key does not exist, it is created with an initial value of the amount.	@qishenonly	finish
16	String method Decr	Decr key ttl	Decrease the value of a specified key by 1. If the key does not exist, it is created with an initial value of -1.	@qishenonly	finish
17	String method Exists	Exists key	Check if a key exists. Returns true if the key exists, false otherwise.	@qishenonly	finish
18	String method Expire	Expire key ttl	Set a timeout on a key. After the specified time-to-live (TTL) in seconds, the key will be automatically deleted. Returns true if the timeout was set, false otherwise.	@qishenonly	finish
19	String method Persist	Persist key	Remove the timeout on a key, making it persist indefinitely. Returns true if the timeout was removed, false otherwise.	@qishenonly	finish
20	method encodeStringValue	encodeStringValue value ttl	encodes the value format: type | expire | value	@qishenonly	finish
21	method decodeStringValue	decodeStringValue value	encodes the value format: type | expire | value	@qishenonly	finish

[wangchenguang123]

i want to try 7,9 and try hard to finsh 8

[qishenonly]

i want to try 7,9 and try hard to finsh 8

ok, have a try.