twoitem
Twoitem is a term used in software design to denote a container that holds exactly two elements. It is effectively a programming analogue of the mathematical concept of a pair or a 2-tuple. In practice, twoitem may be implemented as a dedicated data type or as a generic construct that stores two values of possibly different types. The key characteristics are fixed size, and the two components are typically referred to as the first and second elements.
In languages with built-in support for pairs or tuples, twoitem is realized directly as a pair or
Semantics typically include equality and hashing based on both components, and destructuring or pattern matching to
Use cases include returning two results from a function, representing simple key-value pairs, or modeling coordinate