Chairman Tree Difference Array of P3168 [CQOI2015] Task Query System

Now there is a group of tasks, each task has a start and end time and a priority, give you the start and end time and priority of all tasks, ask you at a certain point in time the minimum priority k priority sum.   Ordinary chair tree is a single point modified interval query.   We can use difference array to do prefix sum of interval query ...

Posted by FlyingIsFun1217 on Sun, 13 Oct 2019 13:53:53 -0700

Authorization of applets

Since the widget document was updated, automatic authorization has ceased to exist. Current authorization is achieved through button. Specific knowledge points can refer to the official documentation of the applet. Here is a small demo I made (enter the home page, pop-up boxes, pop-up boxes are a UI component written by myself), nonsense, dire ...

Posted by jerryroy on Sun, 13 Oct 2019 12:10:33 -0700

Masking Operation of Image-Improving the Contrast of Image

The essence of mask: The image of the original image and the mask mask are processed and transported, and the result image is obtained. What is the operation of maps and masks? In fact, each pixel in the image and each corresponding pixel in the mask are processed and operated. For example: 1 & 1 = 1; 1 & 0 = 0; For example, a 3* ...

Posted by vadercole on Sun, 13 Oct 2019 12:00:13 -0700

JDBC Realm of Apache shiro's built-in Realm

Realm Profile: Again, data domains, Shiro, and connectors for secure data are like jdbc connecting to databases; getting information about authentication and authorization through realm realm effect: Shiro retrieves security data from Realm The default home realm: idae looks at realm inheritance relationships with default implementations a ...

Posted by Gappa on Sun, 13 Oct 2019 11:11:33 -0700

vue dynamic form

According to the requirement of the project, the data should be returned according to the background interface, and the form content should be added dynamically.   Description: This component is based on Ant Design of Vue   Six form controls are currently supported: Text Input, Text Area, Select Input, Select Multiple, Data Picker, and Data ...

Posted by aalmos on Sun, 13 Oct 2019 10:09:55 -0700

"ZJOI2014" Galaxy Survey

"ZJOI2014" Galaxy Survey The core of this topic is to quickly find the linear hypothesis repulsion of XPs. The square of the distance from point ((x1,y1)) to line (y=kx+b) is ( displaystyle {(kx1+b-y1)^2}\over {k^2+1}. Then the relative exclusion of XPs is ( displaystyle sum {i points on the path} {(kx_i + b-y_i) ^ 2} over {k ^ 2 + ...

Posted by dakey on Sun, 13 Oct 2019 09:37:07 -0700

Hibernate Implementing the Effect of limit Statement

Hibernate hibernate implements limit effect Since the limit grammar cannot be written directly in the hql statement, this effect needs to be achieved in other ways. limit effects generally require two parameters: start location and number of queries num. Both parameters are final int The implementation code is as follows: try { // ...

Posted by gaz_hayes on Sun, 13 Oct 2019 09:07:20 -0700

Container Signal Use

Off-line installation packages for various versions of kubernetes Container Signal Use Our programs running in containers usually want to do some cleaning operations before the container exits. The more common way is to listen to a signal and delay closing the container. docker provides such functionality: ╰─➤ docker stop --help Usage: doc ...

Posted by jstinehelfer on Sat, 12 Oct 2019 14:41:40 -0700

[JavaWeb] JSTL tag library

JSTL tag library JSTL Standard Label Library; JSTL is used to simplify JSP development and improve code readability and maintainability. JSTL is defined by SUN(Oracle) and implemented by Apache Tomcat team. Reference to JSTL Core Library Core is the most important tag library of JSTL, which provides the basic functions of JSTL. <%@ taglib ...

Posted by farel on Sat, 12 Oct 2019 12:10:36 -0700

php Closure $this scoping problem

Today's problems, Scenario class A defines a static function f1. Another class B is exemplified in this static func f1 f1 then uses an instance of B for setAttribute operation, where one of the attribute s is an anonymous function cf1 cf1 depends on a parameter, which is an example of B <?php class A { public static functi ...

Posted by bogins on Sat, 12 Oct 2019 11:02:25 -0700