O''''''''Reilly Network For Information About''''''''s Book part 106 potx

... list. (You can't write partially abstract classes as in C++, with some methods declared but not implemented.) Line 4. You declare your methods here in the same form as in a class interface. ... effects: · You can assign obj to an object that does not conform to the protocol. · Assigning obj an object that is not declared to conform will trigger a compiler warning. · Sending to obj...

Ngày tải lên: 07/07/2014, 08:20

... especially for inexperienced developers. The problem goes something like this. In C++, you specify interfaces to your methods, with other supporting information, in a header file, or .h file. For ... but it can lead to significant problems for the novice. Example 2-2 shows an example of multiple inheritance in action. A Werewolf is part Man and part Wolf. Problems arise when b...

Ngày tải lên: 07/07/2014, 08:20

... radical invention or departure. The community doesn't feel right. At times, it's too academic and too defensive. [*] Dave Thomas, Programming Ruby (Dallas: Pragmatic Bookshelf, 2005). ... http://blog.ianbicking.org/why-web-programming-matters-most.html. The biggest hurdle for Python is its lack of compelling reasons to move away from Java. Python really needs a killer app. In...

Ngày tải lên: 07/07/2014, 08:20

... generic programming, library design, and the C++ Standard Library, this book is for you. Because the intended audience for the book is intermediate to advanced C++ programmers, there is little coverage ... with or arising out of the use of the information or programs contained herein. The publisher offers excellent discounts on this book when ordered in quantity for bulk pu...

Ngày tải lên: 07/07/2014, 08:20

... across different compilers. Static_assert provides support for static assertions at namespace, class, and function scope. Detailed information is available in "Library 3: Utility." ... properties of parameterizing types or adjusting properties (for example, the cv- qualification [2] ) of those types. Type_traits offers compile-time information about Function Objects...

Ngày tải lên: 07/07/2014, 08:20

... release those resources for you, even in the face of exceptions. Avoiding common errors. Forgetting to call delete is the oldest mistake in the book (at least in this book) . A smart pointer ... member functions on the pointee works like for raw pointers, because of the overloaded operator->. Third, dereferencing scoped_ptr also works exactly like for raw pointers, thanks to...

Ngày tải lên: 07/07/2014, 08:20

... to make the changes also for Colour and COLOUR, and for the plural form colours, the verb colourize, and so forth. Yet another use case for regular expressions is in formatting of text. Many ... Library. This is unfortunate, as there are numerous uses for regular expressions, and users are sometimes deterred from using C++ for writing applications that need support for regula...

Ngày tải lên: 07/07/2014, 08:20

... reg("(new)|(delete)"); There are two reasons for us to enclose the subexpressions in parentheses: one is that we must do so in order to form the two groups for our alternatives. The other reason ... tedious and error prone, and furthermore, these formats are typically exposed to changing requirements; before you know it, some variation of the format needs to be supported, a...

Ngày tải lên: 07/07/2014, 08:20

... earlier, defining predicates for every type we are ever interested in is tedious and utterly unnecessary, when we can use the language to our advantage in a straightforward manner. if (contains<double>(vec[2])) ... situations in which we are willing to do without it. This is for good reasons: Type safety keeps us from making mistakes and improves the performance of our code. S...

Ngày tải lên: 07/07/2014, 08:20

... the behavior for some types, but still allowing a generic implementation to be available for the rest of the types. In other words, you create overloaded function call operators for some types ... rely on the member function template for the rest. This is, in a sense, related to template specialization, where behavior is specialized based on type information. Binary Visitors Th...

Ngày tải lên: 07/07/2014, 08:20