redis.rpush("key", "a", "b", "c"); 

assert redis.lpos("key", "b") == 1

Arguments

key
str
required
The key of the list.
element
unknown
required
The element to match.
rank
int
Which match to return. 1 to return the first match, 2 to return the second match, and so on. 1 by default.
count
int
The maximum number of elements to match. If specified, an array of elements is returned instead of a single element.
maxlen
int
Limit the number of comparisons to perform.

Response

The index of the matching element or an array of indexes if count is specified.
redis.rpush("key", "a", "b", "c"); 

assert redis.lpos("key", "b") == 1