Hashtabelitel

Hashtabelitel is a term used in computer science to denote a data structure that combines the properties of a hash table with a mechanism for maintaining an ordered view of its entries, typically by their titles. The name appears to be a portmanteau of "hash table" and the word for title in several languages, reflecting its common use in indexing items by a title field while preserving fast access.

Architecturally, a hashtabelitel consists of two layers: a hash table that maps a string key (often a title) to a value or a pointer to a record, and an order-maintaining structure that stores the keys in a defined sequence (for example lexicographic order or insertion order). The hash layer provides average-case constant-time lookups, inserts, and deletes, while the order layer enables efficient iteration in the chosen sequence.

Typical implementations use a standard hash table complemented by a balanced search tree or a linked list with maintained pointers, ensuring that all operations respect the order constraint. Insertion and deletion affect both layers, whereas lookups touch only the hash layer. Time complexity is commonly O(1) average for hash operations and O(log n) or O(1) for maintaining order, depending on the chosen structure.

Applications include content management systems, bibliographic databases, and metadata stores where items are retrieved by title and presented in a predictable order. It can also serve as an index in search engines and data catalogs where both fast access and ordered traversal are desirable.

Variations exist, including different choices for the order policy (lexicographic, insertion, or custom ranking) and different collision-resolution strategies. Trade-offs include memory overhead and the cost of maintaining order during resizing, but hashtabelitel-like structures aim to combine fast access with predictable iteration.