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First, what is generics? Generics are "parameterized types". For example, by defining a variable A, we can define this variable as a string type or an integer in the following way. String A; Integer A; Of course, when the type of variable is known, if there is one case, we do not know what type we will need when defining the vari ...

2018 China Collegiate Programming Contest Final (CCPC-Final 2018) Topic Link The thinking of this question is really a step by step approach to the answer, thinking for a long time. 1. Category and Search Sets to Divide Relations into Sets First of all, when we see the contradiction, the first th ...

I. Preface In some scenarios, we need to verify whether the code is duplicated, whether the account number is duplicated, whether the ID number is duplicated, etc. Codes like validation are as follows: So is there any way to solve this similar amount of duplicate code? We can achieve this by customizing annotation validation, as follows by add ...

Integration of Caffeine and Spring Boot Caffeine is a rewritten version of the Guava cache using Java 8 and will replace Guava in Spring Boot 2.0. If Caffeine occurs, Caffeine Cache Manager will be automatically configured. Using the spring.cache.cache-names attribute, you can create a cache at startup and customize it (in sequence) by configur ...

Previous blogs Synchronization and Communication between UCOS Tasks This paper introduces the synchronization mechanism between tasks, such as semaphores, mutexes, message mailbox and message queue, and the realization principle of communication mechanism between tasks. This paper mainly looks at the r ...

- Restore content to start Catalog 1. Branch structure 1.1 Preliminary Introduction 1.2 Use Cases 1.3 practice 2. Cyclic structure 1.1 Preliminary Introduction 1.2 Use Cases 1. Branch structure 1.1 Preliminary Introduction Up to now, all the Python codes we write are executed sequentially, but sometimes logical ju ...

I organize Java advanced materials for free, covering Java, Redis, MongoDB, MySQL, Zookeeper, Spring Cloud, Dubbo, high concurrent and distributed tutorials, a total of 30G, need to collect. Portal: https://mp.weixin.qq.com/s/JzddfH-7yNudmkjT0IRL8Q   Sorting algorithms have evolved over a long period of time, resulting in many different ...

1.5 Structures and Classes Return to directory 1 Object-Oriented TechnologyLast Section 1.4 cpp programming foundationNext section 1.6 Common features of cpp structural morphology source code /* struct.cpp Examples of Structures */ #include <iostream> #include <string> struct Student { std::string name; // Full name std:: ...

Catalog 1. Introduction of Functions 2. Parameters of functions 3. Modules and Functions 4. Recursive function 5. Anonymous functions 6. Multiple Return Values Python's learning has entered its fourth day. In the previous chapters, we have learned basic variable manipulation ...

Preface Language: Java Environment: IntelliJ IDEA JDK Version: 1.8 Source code: GitHub Overview of Search Algorithms and Efficiency Analysis Algorithm name Time complexity Spatial complexity Sequential search O(n) O(1) Binary search O(log2n) O(1) Interpolation search O(log2(log2n)) O(1) fibonacci search O(log2n) O(n) In order t ...