LPOS

The key of the list.

The element to match.

Which match to return. 1 to return the first match, 2 to return the second match, and so on. 1 by default.

The maximum number of elements to match. If specified, an array of elements is returned instead of a single element.

Limit the number of comparisons to perform.

The index of the matching element or an array of indexes if count is specified.