O''''''''Reilly Network For Information About''''''''s Book part 25 ppsx

... 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

... 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

... counting These methods support reference counting or return information about an object's allocation. See Section 1.12 for more information. -(id)retain Increments the receiver's reference ... the call before giving up. If the object supports a -forward:: method, the runtime calls this method, passing it information about the unhandled call. The return value from the fo...

Ngày tải lên: 07/07/2014, 08:20

... lets your -forwardInvocation: method detect that the delegate won't handle it, and instead ignore it. Next you override -forwardInvocation: to redirect the call: 1 -(void )forwardInvocation:(NSInvocation*)inv ... selector]]) 4 [inv invokeWithTarget:myDelegate ]; 5 else 6 [super forwardInvocation:inv ]; 7 } Line 1. The parameter contains information about the method call: the se...

Ngày tải lên: 07/07/2014, 08:20

... performance. The performance of a disk caching system is defined by its hit ratio, or the proportion of accesses to the disk that are avoided by using the cache. In order to estimate the performance ... same hash code, thus negating all of the performance advantages of hashing. Although this is unlikely, it makes SDBH an inappropriate algorithm for use in situations where a maximum ti...

Ngày tải lên: 07/07/2014, 08:20

... to set the type of the quantum to indicate that it contains a big pointer array; this information is used for consistency checking when accessing a quantum that is supposed to be a big pointer ... handling for this case is worthwhile, since it is very common. For example, a word processor might store each line of a file as a string, removing the trailing null from each string befo...

Ngày tải lên: 07/07/2014, 08:20

... only because it seems to have no purpose for existing. The LeafBlock class The interface for LeafBlock is shown in Figure blocki.11. The interface for the LeafBlock class (from quantum\blocki.h) ... Figure newquant.22. The interface for the FreeSpaceArray class (from quantum\newquant.h) (Figure newquant.22) codelist/newquant.22 The Normal Constructor for FreeSpaceArray The...

Ngày tải lên: 07/07/2014, 08:20

... NVL2, CONCAT, and REPLACE. You cannot check for equality or inequality to NULL; therefore, you must use the IS NULL or IS NOT NULL syntax to check for NULL values. Here is an example of the ... change the values as required to perform the operation. Figure 2 shows what types of implicit conversions PL/SQL can perform. Figure 1-2. Implicit conversions performed by PL/SQL credit std...

Ngày tải lên: 07/07/2014, 08:20