What is the use/advantage of function overloading?

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What is the use/advantage of function overloading?

IMO, the primary benefit is consistency in the naming of methods / functions which logically perform very similar tasks, and differ slightly in by accepting different parameters. This allows the same method name to be reused across multiple implementations.

e.g. The overloads: (Good)

function Person[] FindPersons(string nameOfPerson) { ... }
function Person[] FindPersons(date dateOfBirth) { ... }
function Person[] FindPersons(int age, string dogsName) { ... }

Are preferable to 'uniquely named' functions: (Worse)

function Person[] FindPersonsByName(string nameOfPerson) { ... }
function Person[] FindPersonsByDOB(date dateOfBirth) { ... }
function Person[] FindPersonsByAgeAndDogsName(int age, string dogsName) { ... }

This way the coder writing a client which calls / consumes these functions can operate at a higher level of conceptual thinking ("I need to find a person") and doesn't need to remember / locate a contrived function name.

With static typing, the compiler will be left to match the applicable overload based on the usage parameters. For dynamic typing, this same match up will happen at run time, possibly resulting in failure if no appropriate match is found.

What is the use/advantage of function overloading?, IMO, the primary benefit is consistency in the naming of methods / functions which logically perform very similar tasks, and differ slightly in by  Overloading is also used on constructors to create new objects given different amounts of data. For example, you could use overloading to create three different constructors for a "House" object with a house number, street name and color variables.

Function Overloading in C++ : All you Need to Know, One of the major advantages of Function overloading is that it increases the readability of the program because we don't need to use different  Function overloading exhibits the behavior of polymorphism which helps to get different behaviour, although there will be some link using same name of function. Another powerful use is constructor overloading , which helps to create objects differently and it also helps a lot in inheritance.

Overloading is a form of polymorphism. It allows the programmer to write functions to do conceptually the same thing on different types of data without changing the name. (It also allows the programmer to write functions to do conceptually different things depending on parameters, but that's a Real Bad Idea.)

This allows consistency in notation, which is good both for reading and for writing code. I/O is a very common use. In most languages in common use, there's a function or operator that will output whatever you like, such as printf() and kin in C, operator<<() in C++, PRINT in the old BASICS I used to use, whatever. Languages that require functions like printint(), printstring(), printfloat(), and the like have never caught on.

It works very well with C++ templates and any other construct where you don't necessarily know what the variable type is at the time of writing the code.

Function overloading in C++, Function overloading is a C++ programming feature that allows us to have more than The main advantage of function overloading is to the improve the code  Overloading refers to use of something for different purposes. Function Overloading - It refers to the design of family of functions with one function name but with different argument list. The correct function will be invoked by checking the number and type of the arguments.

  1. Multiple behaviors to the same function based on the parameters.
  2. Your function may want to work with some optional details. For example, the following example wants to add a member to the Members object, with whatever detail the user knows. Here age is the minimum detail to create a member, age and memberOf are optional. [Note: definition of functions are not provided in the code snippet.]

    public class Members
    {
        public System.Collections.Generic.List<Member> TeamMembers;
    
        public AddMember(Member m) {}
        public AddMember(string name) {}
        public AddMember(string name, int age) {}
        public AddMember(string name, int age, string[] memberOf) {}
    
        public class Member
        {
            public string Name { get; set; }
            public int Age { get; set; }
            public string[] MemberOf { get; set; }
        }
    }
    
  3. You may want your method to be suitable for multiple type of objects. ex. Console.WriteLine() method is capable of writing empty line, bool, int, string, char[], float etc. on the console. This was made possible because of function overloading.

Function Overloading in C++, We use cookies to ensure you have the best browsing experience on our website​. Function overloading is a feature in C++ where two or more functions can have Function overloading can be considered as an example of polymorphism​  The main advantage of function overloading is to the improve the code readability and allows code reusability. In the example 1, we have seen how we were able to have more than one function for the same task(addition) with different parameters, this allowed us to add two integer numbers as well as three integer numbers, if we wanted we could have some more functions with same name and four or five arguments.

Function overloading, An overloaded function is really just a set of different functions that happen to have the same name. The determination of which function to use for a particular  Answer: Benefits of constructor overloading in C++ is that, it gives the flexibility of creating multiple type of objects of a class by having more number of constructors in a class, called constructor overloading. In fact, it is similar to C++ function overloading that is also know as compile time polymorphism.

What is the use/advantage of function overloading, Function overloading exhibits the behavior of polymorphism which helps to get different behaviour, although there will be some link using same name of function​. A function’s return type is NOT considered when overloading functions. (Note for advanced readers: This was an intentional choice, as it ensures the behavior of a function call or subexpression can be determined independently from the rest of the expression, making understanding complex expressions much simpler.

C++ Function Overloading, Advantages of Overloading : 1) The function can perform different operations and hence eliminates the use of different function names for the same kind of  C++ allows you to specify more than one definition for a function name or an operator in the same scope, which is called function overloading and operator overloading respectively. An overloaded declaration is a declaration that is declared with the same name as a previously declared declaration in

What is overloading in C++?​, The advantage of function overloading is that it increases the readability of a program because you don't need to use different names for the same action. Polymorphism was a spin off of the PL/SQL concept called "overloading" Overloading a stored procedure or function refers to the ability of a programming method to perform more than one kind of operation depending upon the context in which the method is used.

Comments
  • I agree, but you need to be careful if for some reason now you want to create FindPerson(String city) so I'm not sure that was the best example... Arguments are still valid though
  • Really good explanation .. thanks for improve my knowledge sir :) can you also explain me for "usage of method overriding in same way ?\"
  • @iPatel - overriding is the enabler of subtype polymorphicism, as implemented in virtual class methods (often abstract) or interfaces - have a look at the example in the Wikipedia link. Also see here. As an aside, overloading is sometimes referred to as adhoc polymorphicism.
  • @Alston I don't believe there's any mention of any memory saving here, and there won't be any memory benefit with overloading - overloading is simply a convenience to the developer to allow them to reuse the same function name symbols in code, provided that the parameter signatures differ. From the compiler's perspective, it will consider each overload as a different and independent.
  • @StuartLC Sorry, I misunderstood.
  • Aren't default arguments more suitable for this example? I don't see this as good use of function overloading, especially as you have to either duplicate code or invoke the simpler methods (with less arguments) inside of the more complex ones.
  • Default parameter can provide answer to addition of more parameters. But the essence here is method overloading lets you execute an entirely different block of code (method) based on the type of the parameter and the number of parameters being inserted. In the first two variations of AddMember, you can add a Member object as an argument or a string; the execution of them might go in different route. Compare this functionality with Console.Write() method for instance.
  • What programming language is that? Did your , and = key break? ;)