O''''''''Reilly Network For Information About''''''''s Book part 224 ppsx

... literals, etc. Particularly for those programmers coming from other scripting languages such as Perl, Python or tcl, you'll find Ruby's conventions familiar, or at least straightforward ... enamored with literals. I'm waiting for the day when a language comes along and introduces "figuratives." In the interim, the rules Ruby uses for literals are simple and i...

Ngày tải lên: 07/07/2014, 08:20

... it seemed like a really good idea. Mostly, for what Java was designed for, they got it right. Of course, it's a strongly typed language, which for some purposes is great, and other purposes ... 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...

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

... 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

... 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

... 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

... functions is to supply separate template type arguments for the return type and the argument types for the function call. Also, there's a suffix for the name of the function class, which is an ... alternative form. If you need to write your code with maximum portability, you might also choose to use the alternative form. Let's take a look at the most [ The most interest...

Ngày tải lên: 07/07/2014, 08:20

... otherwise NO. -(id )perform:(SEL )sel with:(id )obj1 with:(id )obj2 The same as -perform: but also provides two arguments to the method being called. -(retval_t)performv:(SEL )sel :(arglist_t)args ... -doesNotRecognize. Override as described in Section 1.11 to implement message forwarding. The parameter types are the same as for - performv::. 1.10.3.7 Posing The following metho...

Ngày tải lên: 07/07/2014, 08:20