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Programming construct
computer programming, a function object is a construct allowing an object to be invoked or called as if it were an ordinary function, usually with the same
Function_object
Software programming optimization technique
implementation of its getter — a function that creates an object upon the first invocation, caches the instance, and returns the same object on all subsequent invocations
Memoization
C++ standard library header for functional programming utilities
writing a new function object, simply by combining predefined function objects and function object adaptors. The class template std::function provided by
Functional_(C++)
Programming paradigm based on objects
Object-oriented programming (OOP) is a programming paradigm based on objects – software entities that encapsulate data and function(s).[clarification
Object-oriented_programming
Programming language feature
retrieve the function as a value: (function foo) evaluates to a function object. #'foo exists as a shorthand notation. To apply such a function object, one must
First-class_function
Object whose state cannot be modified after it is created
In object-oriented (OO) and functional programming, an immutable object (unchangeable object) is an object whose state cannot be modified after it is
Immutable_object
Pointer that points to a function
dBL[clarification needed], and C) and object-oriented programming languages (such as C++, C#, and D). The simplest implementation of a function (or subroutine) pointer
Function_pointer
Topics referred to by the same term
keyboards Function model, a structured representation of processes in a system Function object or functor or functionoid, a concept of object-oriented
Function
Evaluation of a function on its argument
associates a unique object z: ∀X,Y∃!zΨ(X,Y,z). Therefore the language of set theory can use an extension by definition to include the function application operation
Function_application
2011 edition of the C++ programming language standard
of a function object for every declaration. The object CalculusVer2 uses the std::result_of object to derive the return type of the function object: #include
C++11
Technique for creating lexically scoped first class functions
with languages where functions are first-class objects, in which functions can be returned as results from higher-order functions, or passed as arguments
Closure (computer programming)
Closure_(computer_programming)
Object that creates other objects
In object-oriented programming, a factory is an object for creating other objects; formally, it is a function or method that returns objects of a varying
Factory (object-oriented programming)
Factory_(object-oriented_programming)
Inheritable and overridable function or method for which dynamic dispatch is facilitated
In object-oriented programming such as is often used in C++ and Object Pascal, a virtual function or virtual method is an inheritable and overridable function
Virtual_function
High-level programming language
ECMAScript standard. It has dynamic typing, prototype-based object-orientation, and first-class functions. It is multi-paradigm, supporting event-driven, functional
JavaScript
Set of rules defining correctly structured C++ program
a function in a derived class overrides a function in a base class, the function to call is determined by the type of the object. A given function is
C++_syntax
Syntactic ambiguity in C++
distinguish between initializing an object parameter, declaring an object or declaring a function while specifying the function's return type. In these situations
Most_vexing_parse
Software design pattern
open/closed principle in object-oriented programming and software engineering. In essence, the visitor allows adding new virtual functions to a family of classes
Visitor_pattern
JavaScript framework
library functions to support classes and class-based objects. In JavaScript, object creation is prototype-based instead: an object creating function can have
Prototype JavaScript Framework
Prototype_JavaScript_Framework
Document that proposed additions to the C++ standard library
Polymorphic function wrapper (function) – can store any callable function (function pointers, member function pointers, and function objects) that uses
C++_Technical_Report_1
Using one interface or symbol with regards to multiple different types
languages, subtyping allows a function to be written to take an object of a certain type T, but also work correctly if passed an object that belongs to a type
Polymorphism (computer science)
Polymorphism_(computer_science)
Association of one output to each input
plane. Functions are widely used in science, engineering, and in most fields of mathematics. It has been said that functions are "the central objects of investigation"
Function_(mathematics)
Response of an optical system to a point source of light
impulse functions, i.e., as a superposition over weighted point spread functions in the image plane using the same weighting function as in the object plane
Point_spread_function
System with weakly-associated components
when a function of an object is referenced as an object (freeing it from having any knowledge of its enclosing host object) the new function object can be
Loose_coupling
Named function defined within a function
escape the enclosing function, for example if functions are first class objects and a nested function is passed to another function or returned from the
Nested_function
Computer data storage architecture that manages data as objects
hardware, and data-management functions like data replication and data distribution at object-level granularity. Object storage systems allow retention
Object_storage
Set of rules defining correctly structured programs
// On MyObject Function, not object console.log(MyObject.staticC); // blue const object = new MyObject('red', 1000); console.log(object.attributeA); //
JavaScript_syntax
Programming language family
fdefinition 'f to a new function object. fdefinition is a global function definition for the function named f. #' is an abbreviation for function special operator
Lisp_(programming_language)
Capability of some programming languages
be overloaded as Print(text_object T); Print(image_object P). If we write the overloaded print functions for all objects our program will "print", we
Function_overloading
Visual artifact that depicts or records perception
image) refers specifically to the reproduction of an object formed by light waves coming from the object. A volatile image exists or is perceived only for
Image
In functional programming
using the partial function defined in its core library. The C++ standard library provides bind(function, args..) to return a function object that is the result
Partial_application
Symbol representing a mathematical concept
symbol X representing an object of type T, F(X) is a symbol representing an object of type U. One can similarly define function symbols of more than one
Function_symbol
Concept around which an attitude is formed and changes over time
represent an attitude toward the object. Attitude objects also play a significant role in shaping and determining the functions of attitudes, which can be classified
Attitude_object
Function reference passed to and called by another function
allow a function object to be passed. CLI languages such as C# and Visual Basic (.NET) (VB.NET) provide a type-safe encapsulating function reference
Callback (computer programming)
Callback_(computer_programming)
Class used for injecting methods
graphical objects. A graphical object may have a generic width function. The border-mixin would add a border around an object and has a method computing its
Mixin
Function that takes one or more functions as an input or that outputs a function
computer science, a higher-order function (HOF) is a function that does at least one of the following: takes one or more functions as arguments (i.e. a procedural
Higher-order_function
Mathematical formula involving a given set of operations
are called elementary functions. The closed-form problem arises when new ways are introduced for specifying mathematical objects, such as limits, series
Closed-form_expression
Function definition that is not bound to an identifier
anonymous function (function literal, lambda function, or block) is a function definition that is not bound to an identifier. Anonymous functions are often
Anonymous_function
Lifetime of a computer software object
In object-oriented programming (OOP), object lifetime is the period of time between an object's creation and its destruction. In some programming contexts
Object_lifetime
anonymous function (function literal, lambda function, or block) is a function definition that is not bound to an identifier. Anonymous functions are often
Examples of anonymous functions
Examples_of_anonymous_functions
Special function called to create an object
object-oriented programming, a constructor (abbreviation: ctor) is a special type of function called to create an object. It prepares the new object for
Constructor (object-oriented programming)
Constructor_(object-oriented_programming)
Lightweight programming language
be an array of objects. function Point(x, y) -- "Point" object constructor return { x = x, y = y } -- Creates and returns a new object (table) end array
Lua
Object with no referenced value or with defined neutral ("null") behavior
In object-oriented computer programming, a null object is an object with no referenced value or with defined neutral (null) behavior. The null object design
Null_object_pattern
Design philosophy of 19th–20th centuries
appearance and structure of a building or object (architectural form) should primarily relate to its intended function or purpose. The architect Louis Sullivan
Form_follows_function
Programming language
Function groups – These are libraries of self-contained function modules (enclosed by FUNCTION/ENDFUNCTION and invoked with CALL FUNCTION). Object classes
ABAP
Compile-time transformation
is also related to the technique from object-oriented programming of representing functions by function objects (as an alternative to closures). The following
Defunctionalization
Programming language standard
unique, named data object with several parts: name, value, function, property list, and package. Of these, value cell and function cell are the most important
Common_Lisp
Meromorphic function on the complex plane
An L-function is a meromorphic function on the complex plane, and one out of several categories of mathematical objects studied in analytic number theory
L-function
Software component technology from Microsoft
"DllGetClassObject entry point (COM)". MSDN. If a call to the CoGetClassObject function finds the class object that is to be loaded in a DLL, CoGetClassObject uses
Component_Object_Model
multidimensional geometric objects (shapes). An object as a point set in multidimensional space is defined by a single continuous real-valued function f(X) of point
Function_representation
Conversion process for computer data
print CLOS objects. Instead the programmer may write a method on the generic function print-object, this will be invoked when the object is printed.
Serialization
Transforming a function in such a way that it only takes a single argument
family is arranged so that for each object x {\displaystyle x} in X , {\displaystyle X,} there is exactly one function f x {\displaystyle f_{x}} , such that
Currying
Interface to call functions from other programming languages
FFIs are restricted to free standing functions, while others also allow calls of functions embedded in an object or class (often called method calls);
Foreign_function_interface
Concept in Lacanian psychoanalysis
breast...this breast in its function as object, object a cause of desire.' Next there emerges 'the second form: the anal object. We know it by way of the
Objet_petit_a
Probability of survival beyond any specified time
The survival function is a function that gives the probability that a patient, device, or other object of interest will survive past a certain time. The
Survival_function
frequently function as object complements. The object complement is bold in the following examples: She painted the barn red. – Adjective as object complement
Object_complement
Point where a mathematical object behaves irregularly
singularity is a point at which a given mathematical object is not defined, or a point where the mathematical object ceases to be well-behaved in some particular
Singularity_(mathematics)
Form of type polymorphism
definition, support function literals, which can also be stored in records, records types with subtyping provide some of the features of object-oriented programming
Subtyping
Topics referred to by the same term
functor logic Function word in linguistics In computer programming: Functor (functional programming) Function object used to pass function pointers along
Functor_(disambiguation)
Mechanism for supporting dynamic dispatch
determine which implementation of the function the call should be dispatched to. This depends on the actual class of the object, not the class of the reference
Virtual_method_table
callable object, in computer programming, is any object that can be called like a function. pointer to function; pointer to member function; functor;
Callable_object
Commonly encountered mathematical objects include numbers, expressions, shapes, functions, and sets. Mathematical objects can be very complex; for example
Mathematical_object
pattern Factory object Factory pattern Field Finalizer First-class function Fragile base class Function composition Generic programming God object Heap-based
Index of object-oriented programming articles
Index_of_object-oriented_programming_articles
Declaration of a function's name and type signature but not body
translate into object files, to be combined by a linker into an executable or a library. The function declaration precedes the function definition, giving
Function_prototype
Family of higher-order functions
In functional programming, a fold is a higher-order function that analyzes a recursive data structure and, through use of a given combining operation,
Fold_(higher-order_function)
Group of standard library class templates
structure implements a priority queue, which is by default sorted using function object std::less<T> (a max heap). Its default underlying collection type is
Sequence_container_(C++)
Theoretical framework
entities and relationships. The entities can represent independent functions, objects, or events. The relationships are responsible for relating the entities
Conceptual_model
Distance from a point to the boundary of a set
SDF was introduced as a loss function to minimise the error in interpenetration of pixels while rendering multiple objects. In particular, for any pixel
Signed_distance_function
Function that is tied to a particular instance or class
A method in object-oriented programming (OOP) is a procedure associated with an object, and generally also a message. An object consists of state data
Method_(computer_programming)
Study of discrete mathematical structures
natural numbers), rather than "continuous" (analogously to continuous functions). Objects studied in discrete mathematics include integers, graphs, and statements
Discrete_mathematics
Mapping which preserves all topological properties of a given space
or bicontinuous function, is a bijective and continuous function between topological spaces that has a continuous inverse function. Homeomorphisms are
Homeomorphism
Notation for representing a fixed value in source code
compound values such as arrays, records, and objects. An anonymous function is a literal for the function type. In contrast to literals, variables or constants
Literal (computer programming)
Literal_(computer_programming)
Function with variable number of arguments
by the macros. va_start takes two arguments, a va_list object and a reference to the function's last parameter (the one before the ellipsis; the macro
Variadic_function
Object which stores memory addresses in a computer program
run-time linking to dynamic link libraries (DLLs). In object-oriented programming, pointers to functions are used for binding methods, often using virtual
Pointer (computer programming)
Pointer_(computer_programming)
Feature in programming languages
dispatches a function call to different concrete functions depending on the runtime types of two objects involved in the call. In most object-oriented systems
Double_dispatch
Upward force that opposes the weight of an object immersed in fluid
water or oil and water. Buoyancy is a function of the force of gravity or other source of acceleration on objects of different densities, and for that
Buoyancy
Object.setPrototypeOf function: Object.setPrototypeOf(myObject, null); As of ECMAScript 5 (ES5), the prototype can also be bypassed by using Object.create(null):
Comparison of programming languages (associative array)
Comparison_of_programming_languages_(associative_array)
Behavioral design pattern
first-class functions and higher-order functions in functional programming languages. Specifically, the invoker object is a higher-order function of which
Command_pattern
Operation on mathematical functions
two functions, f {\displaystyle f} and g {\displaystyle g} , and returns a new function f ∘ g {\displaystyle f\circ g} . When the composite function f ∘
Function_composition
Process of deriving classes from, and organizing them into, a hierarchy
behaviors of the "parent object", with the exception of: constructors, destructors, overloaded operators and friend functions of the base class. Inheritance
Inheritance (object-oriented programming)
Inheritance_(object-oriented_programming)
Categorical generalization of a function space in set theory
object or map object is the categorical generalization of a function space in set theory. Categories with all finite products and exponential objects
Exponential_object
from function and standard-object. Thus generic functions are both functions (that can be called with and applied to arguments) and ordinary objects. The
Generic_function
Technique for running a program on a computer without directly calling it
an object model to distinguish the general function from the specific implementations. The invoking program sends a message and relies on the object to
Message_passing
Technique in object-oriented programming
In object-oriented programming, object copying is creating a copy of an existing object, a unit of data in object-oriented programming. The resulting object
Object_copying
C++ syntax for specifying placement of objects in memory
management of individual objects (i.e. their "placement" in memory). Normally, when an object is created dynamically, an allocation function is invoked in such
Placement_syntax
Sexual stimulation of one's own anus
It is always safest if a graspable part of the object remains outside the body. The biological function of the anus is to expel intestinal gas and feces
Anal_masturbation
Concept in programming language design
as an argument, returned from a function, and assigned to a variable. The concept of first- and second-class objects was introduced by Christopher Strachey
First-class_citizen
Result of repeatedly applying a mathematical function
applying the same function is called iteration. In this process, starting from some initial object, the result of applying a given function is fed again into
Iterated_function
Term in computing
class, generic function, message, inheritance, polymorphism, and encapsulation. There is an extensive literature on formalized object models as a subset
Object_model
Joining of strings in a programming language
has a concat function. In formal language theory and computer programming, concatenation is the operation of joining sequential objects, such as character
Concatenation
C++ library
Functions and methods are then wrapped using template calls to produce function objects (functors) which can be bound to a signal. Each signal can be connected
Libsigc++
Classes of data types
variables, including local variables, fields of objects, and array elements. Likewise when calling a function: parameters of reference type are copies of
Value_type_and_reference_type
Special objects used in (mathematical) category theory
theory, a branch of mathematics, an initial object of a category C is an object I in C such that for every object X in C, there exists precisely one morphism
Initial_and_terminal_objects
Constructor that copies the state of another object
declaration: Object b = a; is translates as Object::Object(const Object&) (invoke copy constructor) Through function arguments: type function(Object a); Through
Copy_constructor_(C++)
Theory of language
phatic and metalingual functions. The referential function: corresponds to the factor of context and describes a situation, object or mental state. The
Jakobson's functions of language
Jakobson's_functions_of_language
Programming technique of receiving dependencies
injection is a programming technique in which an object or function receives other objects or functions that it requires, as opposed to creating them internally
Dependency_injection
Declarative language
"Eclipse OCL™ (Object Constraint Language)". 31 January 2013. Lano, Kevin; Kolahdouz-Rahimi, Shekoufeh (2021). "Extending OCL with Map and Function Types". Fundamentals
Object_Constraint_Language
Programming language evaluation rules
visible to the calling function. Mutations of a mutable object within the function are visible to the caller because the object is not copied or cloned—it
Evaluation_strategy
Sequence of program instructions invokable by other software
term "function" irrespective of whether they return a value or not; others, such as ALGOL 60 and PL/I, only use the word procedure. Some object-oriented
Function (computer programming)
Function_(computer_programming)
Computer code structure with a table of pointers to functions or similar
dispatch table can be implemented in JavaScript by using an object to store anonymous function definitions. // Dispatch table of actions as well as a fallback
Dispatch_table
Software design pattern
explicit object parameters (colloquially called "deducing this"), introduced in C++23. For the function signatureDish() to call a derived member function cookSignatureDish()
Curiously recurring template pattern
Curiously_recurring_template_pattern
travel, tourism, insurance
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FUNCTION OBJECT
travel, tourism, insurance