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Recently, in the process of chopping language packages in the project, I found that a lot of repetitive work had been done, and then my colleagues pointed out the method of reducing, as if opening the door to a new world. So I relearned the use o ...

Reference Blog: https://blog.csdn.net/qq_34374664/article/details/70149223   1. Convex hull Definition: Suppose that there are several points on the plane, through which a polygon can be made, so that the polygon can "wrap up" all ...

tags : java Foundation flag: blue @toc JavaDay11 static keyword I. Introduction of static Keyword Living conditions: Water dispensers, for example, are usually placed in a public environment where everyone uses them together. It is not said ...

Partition table in Oracle is a good feature of Oracle. It can divide large tables into several small tables, so as to improve the efficiency of SQL execution for the large table, and each partition is transparent to the application.Each partition in the partition table has its own storage characteristics, including table space, PCT_FREE, etc. W ...

1. What is a stored procedure? Stored procedures and functions are sql statements that have been compiled and stored in the database beforehand. Calling stored procedures can simplify our development. The difference between stored procedures and functions is that functions have return values and stored procedures have no return values. 2. Gra ...

Realization of n-order Bessel Curve Formula If you don't know what Bessel Curve is and what it can be used for, you can go to the following article first. Bessel Curve Literacy 1. Effect Reference 2. Idea analysis The general parameter formula given in Baidu Encyclopedia is as follows: Given point P 0, P 1, P 2,... Pn, its Besse ...

Requirements: The mouse hover shows what happened this month. Events used are: onmouseover, onmouseout (the more silly method), the first time I think of this silly method. Moreover, display ing is not used, so it's a wonderful thing to make. However, my sister is a very good person, so she gave me some ideas, and today after reading the sourc ...

Collection set The length of the array is fixed, and the length of the set is variable. Arrays store elements of the same type, which can store basic data type values. Collections store objects. And the types of objects can be inconsistent. Set framework import java.util.Collection; import java.util.ArrayList; //Common methods of Collection pu ...