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In functional programming, fold (also termed reduce, accumulate, aggregate, compress, or inject) refers to a family of higher-order functions that analyze a recursive data structure and through use of a given combining operation, recombine the results of recursively processing its constituent parts, building up a return value.
The Python standard library module functools includes the partial function, allowing positional and named argument bindings, returning a new function. [5] In XQuery, an argument placeholder (?) is used for each non-fixed argument in a partial function application. [6]
For brevity, these words will have the specified meanings in the following tables (unless noted to be part of language syntax): funcN A function.
Python is a high-level, general-purpose programming language. Its design philosophy emphasizes code readability with the use of significant indentation. [33] Python is dynamically type-checked and garbage-collected. It supports multiple programming paradigms, including structured (particularly procedural), object-oriented and functional ...
Python implementation. The one that follows is a complete Python implementation of this example. from typing import List, Tuple import functools class memoize: ...
Similarly, the idea of immutable data from functional programming is often included in imperative programming languages, [108] for example the tuple in Python, which is an immutable array, and Object.freeze() in JavaScript. [109]
Python Explicit partial application with functools.partial since version 2.5, and operator.methodcaller since version 2.6. Ruby The identifier of a regular "function" in Ruby (which is really a method) cannot be used as a value or passed. It must first be retrieved into a Method or Proc object to be used as first-class data. The syntax for ...
IncPy – A custom Python interpreter that performs automatic memoization (with no required user annotations) Dave Herman's Macros for defining memoized procedures in Racket. Memoize.pm – a Perl module that implements memoized functions. Java memoization – an example in Java using dynamic proxy classes to create a generic memoization pattern.