Atomically return and remove the last element of the list associated with
the specified key.
For example if the list contains the elements "a","b","c"
redisRPop will return "c" and the list will become "a","b".
Usage
redisRPop(key, ...)
Arguments
key
The desired key associated with a list.
...
Optional additional arguments. Specify raw=TRUE to skip de-serialization of the data.