The JVM is based on what determines the version of a class

Here you can see the release of all the PostgreSQL version, I take postgresql9.5.4 this version, the other version of the compilation process is similar, we are casual, here do not repeat.

After the source is taken, you are ready to start compiling the installation.

The browser development teams of two companies are consistent in their view of browser events. If you click a button, they think the Click event is not just on the button, but even the entire page.

But interestingly, the IE and Netscape development team actually put forward the concept of an event stream that is almost entirely opposite. The event stream of IE is the event bubbling stream, and the Netscape event stream is the event capture stream

The approximate demand is: Each car installed a company receiver, will be real-time feedback vehicle coordinates, speed, steering and other information, received the vehicle information in the Baidu map on the real-time picture of the vehicle location. Job sites do not necessarily have networks, so they require offline development.

In JavaScript and jquery, there is a way of handling events, and when we write a program to implement certain functions, we find that using native DOM events and events encapsulated in jquery can achieve the same effect, then perhaps we will think that the difference between them is not very large, Even basically there is no difference. This view is wrong, in fact, when the underlying design of the event function, the event attributes that they assign to the element are implemented by different event binding mechanisms.

The first number represents the video direction, the default 0 for all directions, the second number for the video category, the default 0 for all categories, and the third number for the video level, and the default 0 for all levels.

After some basic types of digression, we go back to the function, especially the one we mentioned earlier, how can F # 's function have multiple parameters if the math function can have only a single parameter?

The answer is simple: a multi-parameter function is rewritten as a new function of a series of individual arguments. This is done automatically by the compiler for you. A mathematician with significant influence in functional programming, Haskell Curry, is called "Curry."

Calling the pipe function creates a buffer in the kernel for interprocess communication, a buffer called a pipe that has a read end and a write end. We write a class that implements the Serializable interface (the serialized flag interface), and Eclipse immediately gives a yellow warning: you need to add a serial Version ID. Why should we increase it? How did he figure that out? What's the use? Here's how to explain the problem.

The serializable class implements the purpose of the interface for persistence, such as network transport or local storage, providing prerequisite support for system distribution and heterogeneous deployment. Without serialization, now we are familiar with remote calls, object databases are impossible to exist, we look at a simple serialization class:

Because this is in order to practice the imitation of a travel-like app, so the data here is the use of grab tools to grab, prepare data and other work is not here to repeat, anyway, the addition of data is generally the same. My idea is to get the data in real time from the Web (you can also write the data to death, of course), and then complete the parsing and encapsulation of the data from the list collection through the Network Tools class and the JSON parsing class. Determines how many page pages the Viewpager has, depending on the length of the collection, and how many of the small dots below. In the function, you first set a Boolean-type flag bit to determine whether to stop the carousel (we want to end the carousel when this page is not visible (within the OnStop () method), and define a global variable to record the position of the current small dot.

This is a discussion of the flow control, flow control can be very simple, but also can be very complex, especially dynamic flow control. We have a product in the T country a carrier is in trouble, the carrier's parent company is a European operator, and Europe's operators for product acceptance of the harsh is famous, and this time to bring us trouble is the flow of control.

The general function of this product is to send a subscription short message or MMS content to the mobile phone, similar to a few years ago fire for a period of time mobile newspaper. The flow control of this product is somewhat complex:

1, the first of the system deployment is a cluster, assuming that the cluster has 6 hosts, this 6 host of the message volume per second can not exceed a value, assuming 10000, why this requirement, is because the downstream execution of the message to send a short message gateway or MMS Gateway has flow control, you send the fast, the downstream system will reject you, So the total TPS is not super.

Preface: Slowly accustomed to use idea, think it is really good to use, there is a sense of VS, but the disadvantage is that each start slow, if the changes after the response also need a long time, this aspect does not do well. But the function suggests that the individual feels much better than eclipse. Okay, now I'm going to use idea to develop a simple feature that I want to give a little help to developers who are just not familiar with or ready to use idea.

The JVM is based on what determines the version of a class