O''''''''Reilly Network For Information About''''''''s Book part 36 pps

... people. No other platform has grown as fast and as elephantine as Java. Other platforms are as capable, but are 5% of the size. There's an architectural reason for that. And, really, ... a void. Figure 2-3 shows the many ingredients that come together to form the perfect storm. Figure 2-3. Many forces formed the combined ingredients that led to a perfect storm 2.3.1. ......

Ngày tải lên: 07/07/2014, 08:20

... it opened up the possibility of selling a whole new kind of product: information. The new economy was born. At least in part, it was powered by Java, and the companies that built the servers, ... commerce drove a new need for new tools. Sun, Oracle, BEA, and IBM worked on new standards to enable enterprise on the Web. IBM coined the term e-business to stand for a new, powerful way...

Ngày tải lên: 07/07/2014, 08:20

... goal for the Internet is this: give all users a single application platform (we call it a browser), and give them the ability to run applications in it. Initially, those applications took the form ... capabilities and a cornucopia of third-party (meaning open source for me) libraries. What don't you like? EH: I sympathize with newcomers to the Java "platform." We al...

Ngày tải lên: 07/07/2014, 08:20

... explicitly, he probably won't deal with it at all. For me, and for many of my customers, checked exceptions tend to hurt more than they help, for many reasons:  The exception syntax is incredibly ... natural part of an application. Part of Java's over-reliance on XML comes from its limited ability to express structured data. In Ruby, I can quickly declare a hash map...

Ngày tải lên: 07/07/2014, 08:20

... should bet my Fortune 500 enterprise on a Japanese Mormon named Matz?" What are the big obstacles? DA: Inertia is a serious concern for large companies. What is the roadmap for Ruby? ... There are many great things written on top of the JVM. Ruby feels best for me as a language (for certain tasks), but the platform is harder to sell. If I can get a merger of the two, I...

Ngày tải lên: 07/07/2014, 08:20

... prompt you for each dependency. Answer "Y," or answer "a" once for all dependencies: Attempting remote installation of 'rails' Updating Gem source index for: http://gems.rubyforge.org ... gem install rails -v 0.12.1 Ruby will start the installation process. It goes up to RubyForge (rubyforge.org) and pulls down an index including the appropriate ver...

Ngày tải lên: 07/07/2014, 08:20

... want to break logical control structures, as in implementing a break for our for loop, or processing exceptions. For the most part, though, you want to think "suspend and resume." Continuations ... before it was called Java, and was the author of one of the first advanced Java books. Glenn has 19 years of software development experience, encompassing a wide variety of la...

Ngày tải lên: 07/07/2014, 08:20

... library. The author of Filesystem is Beman Dawes. Boost.Format This library adds functionality for formatting arguments according to format strings, similar to printf, but with the addition ... Besides eliminating the opportunity for such mismatches, Format also enables custom formatting of user- defined types. [4] [4] This is not possible with formatting functions using a variab...

Ngày tải lên: 07/07/2014, 08:20

... container_type container; for (int i=0;i<10;++i) { container.push_back(createA()); } std::cout << "The choir is gathered: \n"; iterator end=container.end(); for (iterator it=container.begin();it!=end;++it) ... dynamically allocated instance of the pimpl, if copying is not permitted for the class using the idiom. That is not appropriate for all classes...

Ngày tải lên: 07/07/2014, 08:20

... generic versions in other namespaces. For example, if a namespace needs a special version for all of its types, specializations or overloads must be provided for each and every type. Otherwise, ... (third-party classes employing their own version of a reference-counter, for example). Or there may be different requirements for deallocating, such as calling another function rather...

Ngày tải lên: 07/07/2014, 08:20

... runtime overhead for performing dynamic_casts. To avoid that overhead, it is tempting to use static_cast, which doesn't have such performance implications. static_cast for downcasts can ... performed. polymorphic_downcast tests the cast with dynamic_cast, but only in debug builds; it then uses static_cast to perform the conversion. In release mode, only the static_cast is perfor...

Ngày tải lên: 07/07/2014, 08:20

... exception or return an error code when an output to a stream was performed (the function would only match for arguments without support for operator<<), and we could do this at runtime, without ... There seems to be a cure for missing operators, right? What if we were to supply a valid output operator for any that matches anything, and introduce that operator<< ... Sup...

Ngày tải lên: 07/07/2014, 08:20

... search for a particular type in a container of heterogeneous objects, or want to test the type of an any to determine further actions. The implementation uses the any member function type for ... but it is tedious to write predicates for every type we are interested in testing for. The implementation is repeated, so this would be the perfect fit for a template solution like the f...

Ngày tải lên: 07/07/2014, 08:20

... reported before the final, "My work here is done!" The reason is that as it stands, print doesn't output the value for any types other than those it was originally designed for (std::string, ... signature of a variant, we would risk proliferation of overloads to accommodate the same functionality for different types of variants. The next section discusses the concept...

Ngày tải lên: 07/07/2014, 08:20

... algorithm from the Standard Library that exists for exactly this purpose, for_ each. To use for_ each to replace the loop, we need to use an adaptor for calling the member function report on the ... takes a while for the eye to get used to, but it's useful. You'll see that there are overloads for both free functions and class member functions. Also, there are overloads...

Ngày tải lên: 07/07/2014, 08:20