r in nutshell

J2se 1.5 In a nutshell Chinese Version 2004-03-22 CLICK: 104 J2se 1.5 In a nutshell Chinese Version Article[H2] j2se 1.5 In a nutshell [/H2]--------------------------------------------------------------------------------According to the Translator's note: the understanding of the new featu

1. What's delegate in C #?A delegate is an object, that knows how to call a method.A delegate type defines the kind of method that delegate instances can call. Specifically,It defines the method ' return type and its parameter types.The Followingdefines a delegate type called Transformer:delegate int Transformer (int x);Transformer is compatible with any method with an int return type and a singleint parameter, such as this:static int Square (int x) {return x * x;}Assigning a method to a delegat

OSPF process.Xi. conditions for establishing a neighbour: The IP address of both interfaces in the chain is the same network, the subnet mask Same MTU Certified by In the same area In the case of special areas, such as stubs and Nssa, all routers in this area need to be configured. Hello and dead Time consistent Consistent network type 12: OSPF Network type Broadcast Type network: The election of the DR, the link layer protocol is Ethernet, the def

synchronized way to see (and modify) the inconsistent state of the object, even if the object's monitor is locked. Locking an object[] doesn ' t lock the individual objects.Locks a object[] array, and cannot lock every object within the array. Primitives is not mutable, so they can ' t (and don ' t need to) be locked.Native types are immutable, so they cannot (and do not need to) lock. Synchronized can ' t appear on a method declaration in an interface.Synchronization cannot appea

, there is the kinds of equality:equality of ref‐ Erence and equality of object. It is important to distinguish between these, kinds of equality. One of the "identical" when talking about equality of references and the word "equal" when Talking about a distinct objects that has the same content. To test-nonidentical objects for equality, pass one of the them to the Equals () method of the other: All objects inherit a Equals () method (from Object), but the default implementa‐tion simply

reference to the Child class objectPolymorphic examples are too many, do not do web development too much. However, the use of polymorphic derivative design patterns is the essence of the entire 23 design patternsEverywhere is manifested, the multi-state light, everywhere, our Richter scale substitution principle is the direct embodiment.The basic features of Java object-oriented actually have nothing to say, it is difficult to derive from a variety of applications, such as inheritance of the cl

In a nutshell: -Monitor. Enter/exit and mutexes are commonly used for protecting objects From being used by two threads at the same time. Every thread acquires Mutex (resp. enters the monitor) before it uses the object, and no other Thread will be allowed to do the same until the mutex is released (resp. Monitor is exited); the monitor methods are faster and use less memory, Mutexes can be shared using SS Processes -The lock statement internally uses

Preface I recently read the book C #3.0 Core Technology in the library. I think it is quite good to read it. C #3.0 technology covers from basic syntax to new features, it is a good book to learn C #3.0. I wanted to download the electronic version from the Internet but couldn't find it, but I read the English version of C #3.0 in a Nutshell, 3rd Edition, also very good. I plan to take the time to learn something and write a few articles on my blog to

of the Lisp language.SAC: is a strictly pure functional programming language.ALGOL: The first clear definition of high-level languages in the history of computers.BASIC: It is one of the most widely used programming languages in the history of computer development.Clipper: is one of the Xbase languages that executes the basic commands of the dBASE language and extends some of the custom functions.Forth: It is a computer programming language and environment based on stack, interactive and simple

MySQL, Mysqli, PDO in a nutshell comparison 1 MySQL extension (Note: original, poor) 2 MYSQLI extensions (process-oriented) (Note: More features than above) 3 Mysqli extension (object-oriented) (Note: More in line with object-oriented thinking than above) 4 Mysqli extension (Object-oriented) (Prepare statement) (Note: More performance and safety than

1, bytecode is always a big paragraph2, other languages run in Java, or implement a compiler similar to Javac, which interprets the language as a class file. Either, directly re-implementing the JVM, directly explaining the language3,java and C + + differences: Java's function call is virtual by default Java always passes the value of the Java does not support multiple inheritance Java does not have operator overloading 4,java ignores all whitespace, tab, line breaks, and so on,

), myobj.tostring () This is being autoconverted to an implementation of a @FunctionalInterface that Have a single nondefault method, takes a single MyObject and returns String. However, this seems like excessive boilerplate, and so Java 8 provides a syntax for Making this easier to read and write: Myobject::tostring This is a shorthand, known as a method reference, which uses an existing method as a Lambda expression. It can be thought of as using a existing method, but ign

Osgi Specification L an open specification for the delivery of managed services to networked environment. L osgi services platform: osgi framework & a set of standard service Definitions   The osgi framework L osgi framework: sits on the top of

A PHP with Memcache cache technology to improve the responsiveness of friends who need to refer to the reference. Connecting to a database The code is as follows Copy Code $memcache _obj = Memcache_connect ("localhost", 11

Java 2 Platform Standard Edition (J2SE) 1.5 (codenamed "Tiger") is an important change to the Java platform and language. Currently, J2SE 1.5 contains 15 JSR requests, the corresponding JCP results in nearly 100 significant changes.Seeing that this

Objective C#3.0 is an object-oriented programming language, which has many features such as multi-purpose and type safety. In order to realize the efficiency of development and learning, she has made great efforts in language simplicity, ease of

have book for those learning and understanding ejbs. Free book chapter from oreilly: Http://fatbrain.oreilly.com/catalog/javacook/ch18.htmlWeb Server Java: servlets and JSP-chapter from Java cookbook Http://fatbrain.oreilly.com/catalog/javaxml2/ch12.htmlSoap-chapter from Java XML, 2nd Edition Http://fatbrain.oreilly.com/catalog/javaxslt/ch05.htmlXSLT processing with Java-chapter from Java and XSLT Http://fatbrain.oreilly.com/news/javaxslt_0801.htmlTop Ten Java and XSLT tips-by Eric M. Bu

processors emerged. Nowadays, the foundation of high-performance programming has been changed to how to make full use of CPU resources and process data more quickly. The open-source TBB library developed by Intel cleverly utilizes the idea of pipeline, an Adaptive High-performance software pipeline TBB: pipeline is implemented. This article will take text_filter as an example to briefly introduce the implementation principle and some key technical points of pipeline, in order to achieve the eff

, create a mytest project. Wait a moment and you will see a list of create files records in the console. A mytest folder is added below % ir_home %/rails_apps, which includes the rails skeleton framework. 4. Follow the ROR practice instructions in sequence. This document is really a beginner's tutorial. We are the good news of cainiao: P, enter the ruby script/generate command under % ir_home %/rails_apps/project_name to generate the controller and model files. After completing this operation,

number of strings, such as assuming @ represents 123456,! for ABCDE. By defining these special symbols, the system administrator can quickly filter, replace, or output the required characters.Considerations for using Regular expressions:1.linux regular is usually handled by the behavioral unit.2.alias grep= ' grep--color=auto ', the lecture takes grep for example.3. Note the character set, Lc_all=cRegular expressions in Linux. It is mainly the regular expression of awk, sed, and grep (Egrep) Th