Function is a block of code which performs a specific task.

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What is the concept behind writing a cancel operation in c++? [closed]

I'm attempting to write a cancel operation for a software download application. This application will first transfer the software to the device and then install the software on it. (These are givens ...
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1answer
136 views

Helper functions - well defined inputs or well defined outputs?

Problem In Codeigniter (PHP framework), I am trying to create a helper function that will inject an ActiveRecord (for MySQL) command into a chain of existing ActiveRecord calls. The reasoning for ...
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1answer
51 views

Function name in parentheses after fuction call in Python

I ran into these lines of code in the QPYTHON Android app. They are part of a sample that uses the Bottle module to create a simple Web server that seems to work fine. app = Bottle() app.route('/', ...
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131 views

Use Generic of Specific Function names for similar objects

Is there a school of thought on putting focus on using generic names for functions, opposed to naming functions based on the things they do? Example Say we have a Bill / Price Sheet object, that has ...
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0answers
17 views

Hidden event handlers and their parameters

I'm having a bit of trouble understanding why has an event handler to be defined as a function. AFAIK, a function can be used as anonymous called procedure as event handler It defines a ...
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2answers
5k views

When to use functions vs methods?

So I know that methods are more OOP than functions. I was wondering if someone could show me an example of a function and a method and explain the differences between methods and functions to me? ...
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951 views

Named output parameters vs return values

Which code is better: // C++ void handle_message(...some input parameters..., bool& wasHandled) void set_some_value(int newValue, int* oldValue = nullptr) // C# void handle_message(...some ...
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2answers
85 views

Looking for terminology for the relation of a subject and a predicate [closed]

While writing some predicates for collection filtering I have stumbled over the choice of the right words for the relation of the subject and the predicate (English is a foreign language for me). What ...
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182 views

Use of malloc in C

Is it necessary to call free function every time we use malloc in C. I am asking this because I have seen many times that it is not called . Thank you
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131 views

Long vs short scripts? Big vs small scripts? [closed]

As a programmer, I have always wondered whether it is preferable to write (a) short modular functions that are each stored in their own script (i.e., file) or (b) long comprehensive scripts that ...
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2answers
125 views

Should you avoid adding unecessary stack frames?

I have been working with laravel (PHP) recently, and there is an option when using their fluent ORM to define where clauses using closures. This gives us two, functionally equivalent, ways to specify ...
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148 views

Is there a approximate string comparison function which is odd like mathematical functions are odd?

I say odd like a mathematical function, a mathematical function is odd if f(-x) = -f(x) I understand that comparing two strings may seem to have little to do with this, because the arguments cannot ...
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1answer
140 views

Can i create a function with variable parameters in C?

I've always wondered where a single function such as printf(); can take in variable parameters and provide the right results. For example, printf("Number is %d",a); which has two parameters, and ...
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114 views

What is the difference between a helper and a convenience function?

The title and the question are the same! The two seem the same to me: a convenience is a helper. A helper is a convenience. So when is it good to use the one or the other term?
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147 views

Writing a method to 'transform' an immutable object: how should I approach this?

(While this question has to do with a concrete coding dilemma, it's mostly about what's the best way to design a function.) I'm writing a method that should take two Color objects, and gradually ...
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1answer
119 views

Haskell types for functions

I don't understand the answer to this question: Q: Can Haskell find a type for the function selfapply defined by: selfapply f = f f A: The function selfapply is not typeable in the simple system of ...
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1answer
393 views

PHP function types

I am trying to find a way of classifying different types of PHP functions. For example that fopen, fwrite, fclose and so on are all part of IO, and the MySQL functions and MySQLi class is all for ...
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1answer
86 views

Const and non-const methods, and possible mutable data member?

I'm working on a design and implementation change due to a bug. The bug fix requires us to modify a class object in a const method. I think the two options are: Have the non-const method cast this ...
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1answer
91 views

Why does this function work even though the vars are different

$inumber1 = 10; $inumber2 = 20; function add($number1, $number2) { echo $number1 + $number2; } add($inumber1, $inumber2); I'm learning PHP coding for the first time and I'm ...
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1answer
315 views

Does this function do one thing only?

Is the following method considered to be doing one thing only? I'm wondering about that since it takes an optional argument. public function findErrors($name = null) { if ($name) { ...
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4answers
121 views

How can Guard Statements and Small Functions coexist?

By Guard Statements I mean something similar to the first part of the function: def doSomething(String something) { // Guard Statement if(!something) { return false } // ...
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2answers
51 views

Iterating a function with a static argument: Global functions + lambdas vs internal function?

I am never sure which of these is better form: Option A def a(x,y): def b(z): return z+y return map(b, x) print a([10,20], 5) Option B def b(z,y): return z+y def a(x,y): return ...
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2answers
135 views

memory needed to store a function in javascript

I have been using sizeof.js to investigate the size of various objects in javascript. It appears from this that the size of a function is essentially zero bytes, regardless of how many instructions ...
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2answers
132 views

Is there a way for Object 1 to call Object 2's enums in a function call?

For example, if I have two classes "Director" and "Follower". I want the Director to tell the follower where to go (ex: follower1.go(direction.LEFT)), and I want the Director to know what directions ...
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1answer
153 views

Using functions as statements on Python

A great feature of Javascript is function statements. You can do this: (function myFunc(){ doSomething(); doSomethingElse(); })(); Which is a way to declare a function and call it without ...
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1answer
109 views

How to split a Service class in two but still use them like one?

I've got a class: AuthenticationService findLoggedInUser() Checks session if User is logged in. If not, check client persistent user login cookie and log in. loginUser($email, $pw, $remember = ...
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1answer
258 views

static or non-static, that is the question? [duplicate]

For comparisons / evaluations of objects of the same class(and other purposes), is it better to define a static or a non-static (is this called "dynamic" by chance?) function? Sample code: class ...
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1answer
87 views

Good practice to use namespace or prefix to indicate what file function is from? [duplicate]

For example, I have the function generate_salt() in encryption.file but the person may not know where generate_salt() is from. Using a namespace like encryption::generate_salt(), or ...
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1answer
134 views

Show all definitions in Scheme?

I want to see all user-made definitions in a Scheme REPL, both loaded from files and entered at the REPL. Is there any way to "dump all definitions"? E.g. if there is: (define (plusone x) (+ 1 ...
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1answer
172 views

LOOP program only need inc and zero

I have 4 different commands in LOOP programming language: y=Zero() y=Val(x)=copy x and put it in register y y=Inc(x)=x+1 y=Dec(x)=x-1 Finally I also have loop n times { ... ...
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2answers
14k views

Drawing Flowchart for function calculate a number in the Fibonacci Series

I'm trying make Flowchart for function calculate a number in the Fibonacci Series. But It looks like not right. I don't how draw the recursive function. Please help me how to fix it. My flowchart: ...
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1answer
249 views

The idea of functionN in Scala / Functionaljava

From brain driven development It turns out, that every Function you’ll ever define in Scala, will become an instance of an Implementation which will feature a certain Function Trait. ...
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1answer
115 views

Setting up folders and importing modules in Python

I'm building an app to automate some processes that are annoying to do by hand (looking in a file, taking certain information out of a file, building another file with that information). My project ...
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2answers
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problems compiling a function with a trait Add in Rust [closed]

I'm trying to write a generic function summ in rust - but to no avail. Could someone please elucidate the problem? fn summ<T:Add>(a:T,b:T)->T { a+b }
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1answer
659 views

Python: Faster to use global variable or pass as arguments to a function? [duplicate]

Hey so i was wondering which is the more efficient way, or better practice to do in this situation. 1, def function(): global number number += 2 Or 2, def function(number): return ...
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1answer
105 views

Is there is a way to pass more than one value to the calling function in c++? [closed]

I'm new at computer science and programming, Can any one give me a hand to know "Is there is a way to pass more than one value to the calling function in c++". Explain how?