language-features

Java has generics and C++ provides a very strong programming model with template s. So then, what is the difference between C++ and Java generics? Alexandru Nedelcu There is a big difference between them. In C++ you don't have to specify a class or an interface for the generic type. That's why you can create truly generic functions and classes, with the caveat of a looser typing. template <typename T> T sum(T a, T b) { return a + b; } The method above adds two objects of the same type, and can be used for any type T that has the "+" operator available. In Java you have to specify a type if you

I'm always surprised that even after using C# for all this time now, I still manage to find things I didn't know about... I've tried searching the internet for this, but using the "~" in a search isn't working for me so well and I didn't find anything on MSDN either (not to say it isn't there) I saw this snippet of code recently, what does the tilde(~) mean? /// <summary> /// Enumerates the ways a customer may purchase goods. /// </summary> [Flags] public enum PurchaseMethod { All = ~0, None = 0, Cash = 1, Check = 2, CreditCard = 4 } I was a little surprised to see it so I tried to compile it,

I 'm trying to do : award_dict = { "url" : "http://facebook.com", "imageurl" : "http://farm4.static.flickr.com/3431/3939267074_feb9eb19b1_o.png", "count" : 1, } def award(name, count, points, desc_string, my_size, parent) : if my_size > count : a = { "name" : name, "description" : desc_string % count, "points" : points, "parent_award" : parent, } a.update(award_dict) return self.add_award(a, siteAlias, alias).award But if felt really cumbersome in the function, and I would have rather done : return self.add_award({ "name" : name, "description" : desc_string % count, "points" : points, "parent

I know, I know... Eric Lippert's answer to this kind of question is usually something like " because it wasn't worth the cost of designing, implementing, testing and documenting it ". But still, I'd like a better explanation... I was reading this blog post about new C# 4 features , and in the section about COM Interop, the following part caught my attention : By the way, this code uses one more new feature: indexed properties (take a closer look at those square brackets after Range.) But this feature is available only for COM interop; you cannot create your own indexed properties in C# 4.0 .

HTML being the most widely used language (at least as a markup language) has not gotten its due credit. Considering that it has been around for so many years, things like the FORM / INPUT controls have still remained same with no new controls added. So at least from the existing features, do you know any features that are not well known but very useful. Of course, this question is along the lines of: Hidden Features of JavaScript Hidden Features of CSS Hidden Features of C# Hidden Features of VB.NET Hidden Features of Java Hidden Features of classic ASP Hidden Features of ASP.NET Hidden

This is the only place I've ever seen and , or and not listed as actual operators in C++. When I wrote up a test program in NetBeans, I got the red underlining as if there was a syntax error and figured the website was wrong, but it is NetBeans which is wrong because it compiled and ran as expected. I can see ! being favored over not but the readability of and && or seems greater than their grammatical brothers. Why do these versions of the logical operators exist and why does seemingly no one use it? Is this truly valid C++ or some sort of compatibility with C that was included with the