konkatenera

Konkatenera is the operation of joining two or more sequences end-to-end to form a single sequence. In computing, it most commonly refers to string concatenation, but the concept also applies to arrays, lists, and other sequence types. The operation preserves the order of the inputs and is typically associative, allowing multiple operands to be combined in a single conceptual step.

The term is a variant spelling of concatenation, with an orthographic choice that can reflect language or contextual conventions. In most programming contexts the concept is named concatenation, and the implementation is provided by operators or functions such as CONCAT in SQL, the + operator in many languages, or dedicated string-joining utilities. Different languages may treat concatenation with slight syntactic differences, but the underlying idea remains the same: produce a new sequence by placing inputs sequentially.

Usage spans many programming languages and data-processing environments. In Python, strings can be concatenated with the + operator, though for many parts a join operation is preferred for performance. In Java, String.concat or the + operator is common. In JavaScript, both the + operator and template literals can produce concatenated results. In SQL, the CONCAT function (or the || operator in some dialects) joins multiple values. For lists and arrays, languages offer various concatenation or append mechanisms, which may differ in mutability and performance characteristics.

Performance considerations matter, especially with immutable strings or large-scale data. Repeated naive concatenation can lead to excessive allocations; common remedies include join builders, accumulating parts in a collection, or using language-specific efficient constructors.

See also: concatenation, string processing, data structures.