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68
votes
22answers
23k views

Where do you declare variables? The top of a method or when you need them? [closed]

I am in sort of a dilemma (in a geekish way of course). I love to declare variables at the beginning of my methods, and usually order them in some logical way. The problem is, when the list gets ...
42
votes
11answers
7k 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 ...
7
votes
3answers
5k 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 ...
107
votes
11answers
35k 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. ...
6
votes
18answers
3k views

What do you name functions/variables/etc when you can't think of a good name?

When you are defining a function/variable/etc and are not sure what to name it, what do you name it? How do you come up with a name? If you use a temporary name as a place-card until you give it it's ...
10
votes
9answers
4k 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 ...
2
votes
2answers
167 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 ...
67
votes
6answers
6k views

Should the variable be named Id or ID?

This is a bit pedantic, but I've seen some people use Id as in: private int userId; public int getUserId(); and others use: private int userID; public int getUserID(); Is one of these a better ...
22
votes
6answers
10k views

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

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 ...
20
votes
17answers
11k 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; ...
30
votes
11answers
2k 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 ...
15
votes
1answer
705 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 ...
11
votes
4answers
2k 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 ...
10
votes
9answers
2k 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 ...
8
votes
3answers
1k views

Are my method or variable names too long?

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 ...
7
votes
4answers
551 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? ...
2
votes
1answer
1k views

Where should variables be declared [duplicate]

Considering I have a for loop in a method of a class. Should the incremented variable be declared as member of the class, or should it be declared in the method it uses it(or even in the for loop, ...
2
votes
4answers
138 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
251 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
98 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 ...