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Long-time connection based on HTTP is a technology of "server push" through long polling, which makes up the insufficiency of HTTP simple request answering mode, and greatly enhances the real and interactive of the program.First, what is long connection, long polling? In plain terms, the client is constantly s

There are two data types in Java: 1. Basic types: long, int, byte, float, double2. Object Type: Long, Integer, Byte, Float, Double, or other classes provided by java. Long is called the long packaging class. Integer, Byte, and Float are also similar. Generally, the first write of the packaging class name is the first

I Zhou Xu sheng today for you to talk about the long tail keyword strategy knowledge, I hope you can support the author; now there are a lot of sites are competing to do a word, such as: SEO consultants, SEO blog and so on this series of words; but the competition for these words is fierce, Our new station and some small sites are fundamentally competitive but they have very high weight of some of the big sites, at this time we should change the strat

In Java we often have to make some judgments, and for judgment, the most used is the ">", "= =", "The difference between a long and long in JavaThere are two types of data in Java:1. Basic type:byte (8), short(+),int (+), long (+), float (+), double (+), char (+), Boolean (1)2. Object type: Byte,short,integer,long,floa

"Long is a class." Long is a primitive. That means long can is null, where long can ' t. Long can go anywhere that takes an Object, long can ' t (since it isn ' t a CLA SS it doesn ' t derive from Object).Java would usually transl

4.3 Loop control statementsIn the real world, there is such a phenomenon:As long as the current oil in the tank is less than the tank capacity of 100 liters, the fuel tank has been refueling;has been continuously for the motherland hard work, as long as I am still alive;The company's 100,000 employees, everyone's wages increased by 10000 yuan;Although these phenomena are different, they all have a common fe

The first seven chapters of Long Tail theory: Chapter 1 long tail market Http://www.cnblogs.com/forfuture1978/archive/2010/02/12/1667878.html Chapter 2 ups and downs Http://www.cnblogs.com/forfuture1978/archive/2010/02/13/1668015.html Chapter 3 brief introduction to long tail Http://www.cnblogs.com/forfuture1978/archive/2010/02/13/1668085.html Chapter 4 three pow

This digest is from the Web. Original URL: http://blog.sina.com.cn/s/blog_6aa178410100vlwr.htmlObjective:In 16-bit environments, int/unsigned int accounted for 16 bits, long/unsigned long accounted for 32 bitsIn 32-bit environments, int accounted for 32 bits, unsigned int accounted for 16 bits, long/unsigned long accou

Questions:For example, sometimes the JSON data network transmission, the client we use long to express, but the server we use a long, sometimes we want to Long is null (for example, some self-increment ID can not set the ID value), but there is always a value, make a half day inexplicable.Solution:Changes the client's long