Installation steps for some common software under Linux

I have always been very advocating the above picture, but because of the work of the relationship, I did not do a good job, but I have made a picture in disguise, but also I feel that a bit effective

It can be seen that the static variable is not owned by a specific object of the class, but is common to all objects of the class, and static variables can be called by the object as well as directly by the class.

In addition, static variables cannot refer to non-static methods, as described in the preceding static loading time, when loading static, non-static variables, methods and so on do not exist, of course, can not be referenced. However, a non-static method or class can normally refer to a static variable or method. Because non-static is always present after the static.

In particular, we do the technology industry, the rapid development of the industry itself, technology, continuous learning is a basic norm. Self-study ability is very demanding. So we are tired of doing our work, old age is not suitable for dry.

We are in a "fast" as the core of the big environment, under the background. So once successful, it's a great, hard-to-replicate achievement.

Then we looked at the Databasefacde class and did not find any functions to perform the migration. With code search, I have a migration () extension method in the Relationaldatabasefacadeextensions class. With the comment parsing, I also determined that it was executing the migration file and updating the changes to the database.

We've found the code for both of these steps, and we're going to write a code that will automatically update the model changes to the database.

In real-world project development, our applications often need to be deployed in multiple environments, such as development environments, test environments, production environments, and so on. In different environments, there are sometimes differences in configuration items, such as the different database addresses of the links.

For this scenario, PM2 can also be very well supported. You first declare the configuration of the different environments through ENV_XX in the configuration file, and then specify the running environment by using the--ENV parameter when you launch the app.

A ready-to-use who command is written, but does it have any shortcomings? Obviously, one of the biggest problems is that the file I/O efficiency is too low.

Because each read and write operation of the system call to complete the user-state and the kernel state of the switch, assuming that the results of a large number of user information to read, then a lot of resources are consumed here, so this is the focus of optimization.

The idea of optimization is also simple, which is to use buffers. Read the utmp data from the kernel each time it comes in the buffer and reads it from the buffer.

Visual field, or the degree of observing the environment at any given time, is one of the most important aspects of virtual reality. More users are now likely to experience a wider range of horizons. The two types of FoV together form the vision of the human race.

Obviously I can't get everyone who implements a custom control to implement a uitypeeditor, so I decided to add support for other types based on the VS control property editor, including:

1. All interface types that inherit from the IControl interface;

2. All types that implement the self-icontrol interface and their subclasses;

3. Generic list attribute (ilist<t>), but type T can only be a subclass that implements the IControl or its implementation class;

At the same time we are urging ourselves, fast? Do Enterprise Cloud Disk We do not have the first advantage, originally than other late start 2 years, now want to catch up quickly. Therefore, we are very anxious every day. A day without doing anything, my heart is very panic.

Static methods, like static variables, are owned by the class, executed at the same time as the class is loaded, not part of a specific object, and can be called by all objects.

Installation steps for some common software under Linux