Variable or scalar is a storage location paired with an associated symbolic name (an identifier), which contains some known or unknown quantity or information referred to as a value.

learn more… | top users | synonyms

136
votes
10answers
50k views

Why is Clean Code suggesting avoiding protected variables?

Clean Code suggests avoiding protected variables in the "Vertical Distance" section of the "Formatting" chapter: Concepts that are closely related should be kept vertically close to each other. ...
45
votes
10answers
11k views

Should I reuse variables?

Should I reuse variables? I know that many best practice say you should not do it, however later when different developer is debugging the code and have 3 variables that look a like and only ...
12
votes
3answers
5k views

Handling extremely large numbers in a language which can't?

I'm trying to think about how I would go about doing calculations on extremely large numbers (to infinitum - intergers no floats) if the language construct is incapable of handling numbers larger than ...
60
votes
14answers
62k views

What is the history of the use of “foo” and “bar” in source code examples?

Why do many code examples, especially tutorials, use the names "Foo" and "Bar" so often? It is almost a standard. For example: void foo(char* bar) { printf("%s", bar); }
16
votes
6answers
5k views

Prefer class members or passing arguments between internal methods?

Suppose within the private portion of a class there is a value which is utilized by multiple private methods. Do people prefer having this defined as a member variable for the class or passing it as ...
1
vote
5answers
377 views

Why does Kotlin require type after variable, rather than before?

C, C++, C#, Java, as well as many other statically typed languages have the type before variable like (int a =5, auto c = 4, etc.). Non-statically typed languages (such as Javascript, basic) use var (...
15
votes
1answer
1k views

Dollar Sign Blues: Javascript and PHP

I grew up programming C++ and Java where everything was safe and beautiful. Compilers made sure to keep me in check if I ever strayed. Of course, everyone did a little Perl in college, but I didn't ...
14
votes
9answers
9k views

When is it ok to use a Global variable

Ok, so this is a bit of a devils advocate question really. When are global variables ok, and if never, what would you use as an alternative? An interesting side-case to this question, how is a ...
9
votes
3answers
10k views

Does it make a difference if I declare variables inside or outside a loop in Java? [duplicate]

Possible Duplicate: Where do you declare variables? The top of a method or when you need them? Does it make a difference if I declare variables inside or outside a loop in Java? Is this for(...
2
votes
2answers
441 views

Is there a difference between declaring variables outside or inside a loop? [closed]

Is there any difference if I were to write something like this: int row,col; for(row = 0; row < data.length; row++){ for(col = 0; col < data[row].length;col++){ //do ...
28
votes
6answers
18k views

Explicitly defining variable data types vs. using the keyword 'var'? [closed]

In C#, am I encouraged to use the all-purpose var keyword for every variable declaration? If yes, do I have to mention those special characters for literal values within the variable declaration like ...
43
votes
7answers
4k views

How to name a variable when the word is both a noun and a verb

I have run into a corner-case problem with the general guidance of: nouns for variables verbs for functions Specifically, I have a case where the word is ambiguous - it can be either a verb or a ...
22
votes
17answers
18k views

How do you name your private variables in C#? [closed]

What is the best practice, most commonly accepted naming conventions for private variables in C#? private int myInteger; private int MyInteger; private int mMyInteger; private int _myInteger; ...
7
votes
4answers
1k views

Method flags as arguments or as member variables?

I think the title "Method flags as arguments or as member variables?" may be suboptimal, but as I'm missing any better terminology atm., here goes: I'm currently trying to get my head around the ...
38
votes
12answers
3k views

Intentional misspellings to avoid reserved words

I often see code that include intentional misspellings of common words that for better or worse have become reserved words: klass or clazz for class: Class clazz = ThisClass.class kount for count in ...
10
votes
3answers
3k views

Are my method or variable names too long? [closed]

So I was currently in the middle of coding, unfortunately for me, I was in "The Zone" then I thought to myself, are my method/variable names to long? POP out of the Zone I go! So I came here to ...
9
votes
4answers
2k views

Definition of “state”

What is a good way to define "state", as in state variable or state machine, to a new (previously non) programmer? What are some good ways to explain why this concept is useful for writing software? ...
10
votes
9answers
3k views

Why do variables need a type?

So we write: Customer c = new Customer(); Why is the design not such that we write: c = new Customer(); c.CreditLimit = 1000; The compiler can work out c points to a Customer and allow Customer'...
2
votes
4answers
392 views

Overwriting and returning the value of the argument used as conditional of an if statement, inside the same if statement

A simplified example: function logTheColor (color){ if(color == "red"){ color = "The color is red " } else if (color == "yellow") { color = "The color is yellow " } else { ...
2
votes
2answers
327 views

Semantic or structure - which should get preference for variable naming?

We've a call stack in our project. The program is written for microcontroller, the language is C. The call stack is basically an array of integers. The variable that represents this call stack ends ...
1
vote
1answer
125 views

When should I pass value as class variable and when as a method argument?

Is there a general rule of thumb, when we should pass a value as as class variable and when as a method argument? Or is it just a choice of the developer? For example -- are there any reasons, why ...