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  2. Fold (higher-order function) - Wikipedia

    en.wikipedia.org/wiki/Fold_(higher-order_function)

    In the example above, + is an associative operation, so the final result will be the same regardless of parenthesization, although the specific way in which it is calculated will be different. In the general case of non-associative binary functions, the order in which the elements are combined may influence the final result's value.

  3. Higher-order function - Wikipedia

    en.wikipedia.org/wiki/Higher-order_function

    In mathematics higher-order functions are also termed operators or functionals. The differential operator in calculus is a common example, since it maps a function to its derivative, also a function. Higher-order functions should not be confused with other uses of the word "functor" throughout mathematics, see Functor (disambiguation).

  4. Kotlin (programming language) - Wikipedia

    en.wikipedia.org/wiki/Kotlin_(programming_language)

    Kotlin provides support for higher-order functions and anonymous functions, or lambdas. [ 38 ] // the following function takes a lambda, f, and executes f passing it the string "lambda" // note that (String) -> Unit indicates a lambda with a String parameter and Unit return type fun executeLambda ( f : ( String ) -> Unit ) { f ( "lambda" ) }

  5. Map (higher-order function) - Wikipedia

    en.wikipedia.org/wiki/Map_(higher-order_function)

    In many programming languages, map is a higher-order function that applies a given function to each element of a collection, e.g. a list or set, returning the results in a collection of the same type. It is often called apply-to-all when considered in functional form.

  6. First-class function - Wikipedia

    en.wikipedia.org/wiki/First-class_function

    First-class functions are a necessity for the functional programming style, in which the use of higher-order functions is a standard practice. A simple example of a higher-ordered function is the map function

  7. Higher-order programming - Wikipedia

    en.wikipedia.org/wiki/Higher-order_programming

    Higher-order programming is a style of computer programming that uses software components, like functions, modules or objects, as values. It is usually instantiated with, or borrowed from, models of computation such as lambda calculus which make heavy use of higher-order functions. A programming language can be considered higher-order if ...

  8. Functional programming - Wikipedia

    en.wikipedia.org/wiki/Functional_programming

    In calculus, an example of a higher-order function is the differential operator /, which returns the derivative of a function . Higher-order functions are closely related to first-class functions in that higher-order functions and first-class functions both allow functions as arguments and results of other functions. The distinction between the ...

  9. Filter (higher-order function) - Wikipedia

    en.wikipedia.org/wiki/Filter_(higher-order_function)

    In functional programming, filter is a higher-order function that processes a data structure (usually a list) in some order to produce a new data structure containing exactly those elements of the original data structure for which a given predicate returns the Boolean value true.