itemsOfTypeString

itemsOfTypestring is a programming concept referring to a function or utility that retrieves elements from a collection whose type is string. It is commonly used in languages or data processing pipelines that distinguish between different element types within a homogeneous collection.

In typical use, itemsOfTypestring takes a collection such as a list or array and returns a new collection containing only elements that are strings. The operation preserves the original order of the items and generally does not attempt to convert non-string elements to strings. It relies on a type check, such as testing whether an item is of the string type, rather than performing a coercion.

Variants of the concept exist across programming languages. Some implementations name the function differently (for example, itemsOfTypeString or a string-specific filter) but share the same purpose: filtering by the string type. In many languages, this is achieved by applying a predicate like is_string or typeof(item) == "string". Some environments also recognize language-specific string representations or Unicode text as strings, which can influence whether an item is included.

Example: given a collection [1, "alpha", true, "beta"], itemsOfTypestring would yield ["alpha", "beta"].

Notes on behavior may vary: some implementations exclude null values, while others may treat them as non-strings; error handling and behavior with missing values depend on the language and library design. The operation is typically linear in the size of the input, with additional memory for the resulting collection.

See also: type checking, filtering, is_string, isinstance, typeof, select.