Longest ascending subsequence-dynamic programming

Problem description Given an unordered array of integers, find the length of the longest ascending subsequence. Example: Input: [10, 9, 2, 5, 3, 7, 101, 18] Output: 4 Interpretation: The longest ascending subsequence is [2,3,7,101], and its length is 4. Explain: There may be multiple combinations of ...

Posted on Sun, 06 Oct 2019 02:25:39 -0700 by pthurmond

MyBatis Plus-4-Conditional Constructor

Conditional constructor 1.1 EntityWrapper Mybatis-Plus constructs query conditions through Entity Wrapper (EW, a query condition constructor encapsulated by MP) or Condition (similar to EW), which is simple and convenient! Entity wrapper, mainly used to deal with sql splicing, sorting, entity parameter query, etc. Entity Wrapper inherits Wrapp ...

Posted on Sat, 05 Oct 2019 21:59:19 -0700 by Hokus

Data structure: stack principle and Implementation

I. Introduction Stack is a data structure of first-in-first-out, then-in-first-out. If the figures 10, 15, 6, 9 are stored on the stack, the data from the stack will be 9, 6, 15, 10 in order. The stack structure is like the box in our life. The first item to be put in will be at the bottom of the box ...

Posted on Sat, 05 Oct 2019 20:53:16 -0700 by snascendi

Linux system: ZooKeeper 3.4 middleware built under Centos7, summary of common commands

I. Download and Unzip 1. Introduction to Zookeeper Zookeeper, as a distributed service framework, is mainly used to solve the consistency problem of application systems in distributed cluster. It can provide data storage based on directory node tree similar to file system. But Zookeeper is not used to store data specifically. Its function is m ...

Posted on Sat, 05 Oct 2019 20:03:16 -0700 by suneel

Maximum Incremental Sequence and Maximum Decreasing Sequence of Written Test Question 2 of Shangtang, 2020, Aug. 19

Title: If the continuous subarray B of an integer array A satisfies the following properties, then we compose the subarray into "peaks" len(B)>=3 There is a variable i, 0 < I < len (B) - 1, B [0] <... B[i]>... B[len(B)-1] B may be the complete works of A. Now give me an array A ...

Posted on Sat, 05 Oct 2019 14:58:49 -0700 by cljones81

Problems encountered by Spring Boot MyBatis using Redis as a secondary cache

When Spring Boot MyBatis uses Redis as a secondary cache, it encounters a weird problem, which is always reported when MyBatis retrieves the cache from Redis and deserializes it. org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.ClassCastException: hello.entity.User cannot be cast to h ...

Posted on Sat, 05 Oct 2019 01:39:39 -0700 by mellowman

Talk about the process ClientBeat of nacos Service

order This paper mainly studies the process ClientBeat of nacos Service. Service.processClientBeat nacos-1.1.3/naming/src/main/java/com/alibaba/nacos/naming/core/Service.java public class Service extends com.alibaba.nacos.api.naming.pojo.Service implements Record, RecordListener<Instances> { private static final String SERVICE_NAME_S ...

Posted on Fri, 04 Oct 2019 23:57:39 -0700 by robman2100

web front-end entry to actual combat: JavaScript to achieve barrage effect

Barrage is a very common function. The following is a small implementation plan that I encapsulated. There are shortcomings that can be raised or improved freely. Code directly: <!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <meta content="width=dev ...

Posted on Fri, 04 Oct 2019 23:24:18 -0700 by srikanth03565

Spring security Note 4/4: Customizing Success and Failure

Customize Success and Failure Or on the basis of the previous examples, the authentication successfully jumped the page and changed to the authentication successfully returned data. Implementation steps 1. Copy the source code of the previous example Rename package name case 3 to case 4 Rename Case3Application.java to Case4Application.java 2. ...

Posted on Fri, 04 Oct 2019 19:24:16 -0700 by rhiza

Mysql Stored Procedures

stored procedure know In some programming languages, such as pascal, there is a concept called "process" and "function", such as sub. Java, Python, PHP in VB, no process, only function. Procedure: Several statements are encapsulated and executed when invoked. Function: A process with a return value (ps: Python function is bo ...

Posted on Fri, 04 Oct 2019 14:11:12 -0700 by gladius