Programmer Think

17, Three paradigms of database design 1. What is the database design paradigm? The design basis of database table teaches you how to design database table. 2. What are the common database design paradigms? Three. The first paradigm: it is required that any table must have a primary key, and no field is atomic and can no longer be divided. The ...

🎈🎈🎈🎈🎈 Previous recommendations: 🎍 On the five components of spring MVC and the analysis of execution principle. 🎍 Quickly learn about Java virtual machine (JVM) and common interview questions (constantly updating...) 🎍 I am grateful for the experience of this half year and hope to live up to expectations in the future. (Qiu Zhao's exper ...

Circular dependency in Spring What is circular dependency What is circular dependency? It can be divided into two parts: loop and dependency. Loop refers to the loop in the computer field, and the execution process forms a closed loop; Dependency is the prerequisite for completing this action, which is generally consistent with the meaning of ...

1, Overview Recently, I want to change my job. I interviewed several people before. I feel that both sides don't see each other very much. I'm 40 years old. It's almost the end of the year. I'd better do some preparatory work. It's hard to find a job. I was not ready to find information on the Internet. I happened to see the "Huawei Danie ...

JAVA interview manual JAVA overview 1. What is programming Programming is a process in which a computer uses a programming language to write program code to solve a problem and finally get the result. In order to make the computer understand people's intention, human beings must tell the computer the ideas, methods and means of the problems ...

leetcode lecture on algorithm interview in Dachang 18. Queue Video Explanation (efficient learning): Click to learn catalog: 1. Introduction 2. Time and space complexity 3. Dynamic planning 4. Greed 5. Binary search 6. Depth first & breadth first 7. Double pointer 8. Sliding window 9. Bit operation 10. Recursion & divide and ...

Interview Handwritten SQL - Ask questions for 3 consecutive days, and finally meet! Some time ago when I went to a company in Shanghai for an interview in autumn enrollment, I was confused. The interviewer directly asked me to write SQL on the spot. The Title I gave was also confused at that time. The Title sounded not difficult, but the inter ...

1588. Sum of all odd length subarrays describe You are given a positive integer array arr. Please calculate the sum of all possible odd length subarrays. A subarray is defined as a continuous subsequence in the original array. Please return the sum of all odd length subarrays in arr. thinking Try to find the number of times each number ...

Previous points here: ↓ Summary of JS interview questions (I) Summary of JS interview questions (II) Summary of JS interview questions (III) Summary of JS interview questions (IV) Summary of JS interview questions (V) 51. The click event on the mobile terminal is delayed. How long is it and why? How to solve this delay? Reference answer: ...

Mybatis usage steps Add requirements = = > add requirements in the xxxMapper interface = = > Add SQL according to requirements in xxxMapper.xml = = > register xxxMapper.xml in configuration XML = = > call according to requirements in controller XML <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration ...