declaration

How do you guys decide between keeping track of something locally and then just passing it in to every method you call on it, or declaring an instance variable and using it in the methods? I tend to prefer instance variables kept in a list at the end of the Class. But as my programs become more and more complicated, this list gets longer and longer... I figure that if something is getting passed often enough it should just be visible to all the boys and girls who need it, but then I start wondering, "why not just make everything public! Then there will be no more need of passing anything at

public class SomeClass { private HashSet<SomeObject> contents = new HashSet<SomeObject>(); private Set<SomeObject> contents2 = new HashSet<SomeObject>(); } What's the difference? In the end they are both a HashSet isn't it? The second one looks just wrong to me, but I have seen it frequently used, accepted and working. Alan Geleynse Set is an interface, and HashSet is a class that implements the Set interface. Declaring the variable as type HashSet means that no other implementation of Set may be used. You may want this if you need specific functionality of HashSet . If you do not need any

i'm sort of a n00b to VB and was wondering how to make a variable available across multiple Subs. It's just a test app to get familiar with VB. My Code: Public Class Sentences Private Sub SentenceBox_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SentenceBox.TextChanged If Me.Text = Trim(Sentence) Then MsgBox("Good job!") Main_Menu.Show() Me.Close() End If End Sub Private Sub ABCs_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim random As Integer = CInt((Rnd() * 10) + 1) Dim Sentence As String Select Case random Case 1

Is there a way to declare, assign and compare a variable to an expression in an if construction in such a way that it is only defined in the scope of the if construction? This works (declare and assign, but of course the condition is only the return value of function f being equal to zero or not): int main() { if(int i = f()) { printf("%d", i); // i is defined here! } else { // Here too! } // But not here! } But when I try to compare the value of i with an actual expression I run into trouble: int main() { // Does not compile because "int i = f()" is not a primary expression? if((int i = f())

I'm novice in .net c++ and trying to create class looking like: public ref class Klient { public: Klient(){} // zmienne static DWORD klienty[41][2]; static int i = 1; static DWORD* pid; static HANDLE* handle; //funkcje }; but MSV says that: error C4368: cannot define 'klienty' as a member of managed 'Klient': mixed types are not supported What's wrong with this code? You can have .NET basic data types as members of your managed class (static int i), or pointers to anything unmanaged (DWORD* pid, HANDLE* handle), but you're not allowed to have an unmanaged object directly, and the array of

I am new to Javascript and got confused by how the function declaration works. I made some test on that and got some interesting results: say(); function say() { alert("say"); } The forward-declaration worked and popup "say" On the opposite say(); say = function() { alert("say"); } did not work, although it also declared a function object If we declare the function and redeclare that afterwards: function say() { alert("speak"); } say(); function say() { alert("say"); } I got "say" instead of "speak". That's surprise! OK. It seems that only the latest function declaration works. Then lets