LPOS

Returns the index of matching elements inside a list.

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.

Example

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

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

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

assert redis.lpos("key", "b", rank=2) == 3

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

assert redis.lpos("key", "b", count=2) == [1, 2]