lastIndexOfObjectlist

lastIndexOfObjectlist is a hypothetical utility function used to locate the position of the last occurrence of an object in a list of objects. It returns the index of the last element that matches the specified target, or -1 if no match is found.

Matching is determined by an equality check. In many implementations, the default is reference equality, meaning two objects match only if they are the same instance. To find objects that are structurally equal, a custom comparator or a deep-equality option must be supplied.

Typical signature and behavior: lastIndexOfObjectlist(list, target, comparator) returns an integer index or -1. If comparator is provided, it is invoked as comparator(target, element) and the last index for which it returns true is returned. If comparator is omitted, equality is checked by default. Time complexity is O(n) where n is the length of the list.

Usage notes: ensure the list contains only comparable items; for large lists or performance-critical code, avoid repeatedly computing deep equality. If the target is null or list contains nulls, handle accordingly.

See also: lastIndexOf, indexOf, deep equality, comparator functions.