Redis does not have a specific command called setIfPresent. However, you can achieve similar functionality using the SETNX command.
The SETNX command sets the value of a key only if it does not already exist. If the key exists, then the command does nothing.
Here’s an example:
SETNX mykey "hello"
This command will set the value of mykey to "hello" only if mykey does not already exist. If mykey already has a value, then this command will do nothing.
You can use this command as a way to implement a “setIfPresent” behavior in Redis. For example:
SETNX mykey "newvalue"
GET mykey
In this example, if mykey already has a value, then the SETNX command will not set it to "newvalue". Instead, it will keep its existing value. The subsequent GET command will return either the original value or the new one depending on whether or not mykey existed before running SETNX.
