enclosureeach

Enclosureeach is a term used in software design to denote the operation of wrapping every element of a collection with a specified enclosure template or container. The idea is to apply a per-element wrapping transformation while preserving the original order and the overall collection structure. The term is not standardized and tends to appear in informal discussions, design notes, or documentation rather than as a formal language construct.

In practice, enclosureeach appears in templating, serialization, and UI rendering workflows. For a list of values, an enclosurerule might wrap each item in a tag or object. Example: given the list [A, B, C] and a wrapper such as <item>...</item>, enclosureeach would yield wrapped outputs like <item>A</item>, <item>B</item>, <item>C</item>. In JSON terms, wrappers may be applied by transforming each element to { "wrapper": element }.

Relation to related concepts: enclosureeach is closely related to map and to wrap or enclosure patterns. The difference is conceptual: enclosureeach emphasizes creating a new container around each element rather than modifying the element itself. In data pipelines, it can be used to prepare heterogeneous data for ingestion by standardizing the per-element representation.

Implementation considerations: many languages can implement enclosureeach with a map or list comprehension that constructs a new wrapper object per element. Memory usage can increase if wrappers are heavy, so streaming or lazy evaluation can mitigate overhead. Defining the wrapper structure consistently is important to ensure uniform output.

See also: wrap, enclosure, template, mapping, serialization, data transformation.