doubleended

Doubleended, typically written with a hyphen as double-ended, is an adjective describing objects or processes that have two ends or operate in two directions. The term is used across fields to indicate bidirectional capability, symmetry, or two-ended functionality. The exact meaning depends on context, ranging from physical ends of a component to the direction of operation in a system.

In computer science, the term often points to the double-ended queue or deque, an abstract data type that allows insertion and removal of elements at both the front and the back. Deques support operations such as push front, push back, pop front, and pop back. They are commonly implemented with circular arrays or linked lists, offering efficient end operations; random access and other performance characteristics vary by implementation.

In hardware and tools, double-ended describes components with connectors or features on both ends. Examples include double-ended cables or adapters designed for bidirectional connections and, in hand tools, double-ended wrenches or spanners with two active ends of different sizes. When used, it often implies compatibility with two ends, but users must observe size, standard, or polarity requirements to ensure proper fit.

Other uses occur in design and logistics to denote symmetry, reversible configurations, or bidirectional processes. The term is widely used but is often hyphenated when used as an adjective preceding a noun.