Arguments

key
string
required

The key of the list.

element
unknown
required

The element to match.

opts
rank
number

The rank of the element to match. If specified, the element at the given rank is matched instead of the first element.

count
number

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

maxLen
number

Limit the number of comparisons to perform.

Response

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