optional-parameters

I have the below code that was working fine until I tried adding the bool NetworkAvailable = true portion. Now I get a Method name expected compile time exception at Line 4 below. void NetworkStatus_AvailabilityChanged(object sender, NetworkStatusChangedArgs e) { var networkAvailable = e.IsAvailable; SetUpdateHUDConnectedMode d = new SetUpdateHUDConnectedMode(UpdateHUDConnectedMode(networkAvailable)); this.Invoke(d); } delegate void SetUpdateHUDConnectedMode(bool NetworkAvailable = true); private void UpdateHUDConnectedMode(bool NetworkAvailable = true) { ... } I am, admittedly, new to

I'm having a problem with optional function parameter in C++ What I'm trying to do is to write function with optional parameter which is passed by reference, so that I can use it in two ways (1) and (2), but on (2) I don't really care what is the value of mFoobar . I've tried such a code: void foo(double &bar, double &foobar = NULL) { bar = 100; foobar = 150; } int main() { double mBar(0),mFoobar(0); foo(mBar,mFoobar); // (1) cout << mBar << mFoobar; mBar = 0; mFoobar = 0; foo(mBar); // (2) cout << mBar << mFoobar; return 0; } but it crashes at void foo(double &bar, double &foobar = NULL) with

I am reading Effective C# by Bill Wagner. In Item 14 - Minimize Duplicate Initialization Logic , he shows the following example of using the new optional parameters feature in a constructor: public MyClass(int initialCount = 0, string name = "") Notice that he used "" instead of string.Empty . He comments: You'll note [in an example above] that the second constructor specified "" for the default value on the name parameter, rather than the more customary string.Empty . That's because string.Empty is not a compile-time constant. It is a static property defined in the string class. Because it is

When Resharper argues with itself, how does one know which persona to give more credence? I think I have found some code that does confuse Resharper (this is apparently a very unusual case - after using it for a day, I think Resharper is the bee's knees/the greatest thing since liquified bread, etc.). With this line of code: ICryptoTransform Encryptor = RijndaelCipher.CreateEncryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16)); Resharper tells me to "add argument name 'rgbkey'" and then "add argument name 'rgbIV'" So that the line is then: ICryptoTransform Encryptor = RijndaelCipher

How do I check if an optional argument was passed to a method? public void ExampleMethod(int required, string optionalstr = "default string", int optionalint = 10) { if (optionalint was passed) return; } Another approach is to use Nullable<T>.HasValue ( MSDN definitions , MSDN examples ): int default_optionalint = 0; public void ExampleMethod(int required, int? optionalint, string optionalstr = "default string") { int _optionalint = optionalint ?? default_optionalint; } Well, arguments are always passed. Default parameter values just ensure that the user doesn't have to explicitly specify them