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This weekend, on a whim, I opened LeetCode to do a question: https://leetcode-cn.com/problems/number-of-enclaves/ Seeing the question, my first thought is: Start with the land on the edge and find its largest connected area. Set the marker bit for the found connected area to avoid duplication. After all the connecting areas of marginal land are ...

Logic control - condition judgment 1, Realization of conditional judgment ifcase 2, Simple structure of if if condition ; then Actions performed Actions performed fi 1. Writing of conditions shell command Determine the execution status code of the command [expression] Numeric expressionCharacter expressionFile directory expre ...

The default SDK does not provide an API interface for application developers to directly shut down or restart the Android system. Generally speaking, high permissions (system permissions or even Root permissions) are required to shut down or restart the Android system. Therefore, in general apps, if you want to realize the shutdown or restart f ...

catalogueWhat is the objectConstructorPrototype objectImplement inheritance and different inheritance methodsobjectWhy object-oriented programmingThe code logic migration is more flexible, the code reusability is high, and the code is highly modularConstructorfunction Person(name) { this.name = name this.getName = function(name) { ...

Functional programming brief introduction Function is a kind of encapsulation supported by Python built-in. We can decompose complex tasks into simple tasks by disassembling large pieces of code into functions and calling functions layer by layer. This decomposition can be called process oriented programming. Function is the basic unit ...

Integration case based on SSMP I Implementation case scheme analysis Case making process Basic CRUD function Call the page and make all functions after confirming asynchronous submission Add paging function and query function II Create backend project environment 2.1 creating modules Create module First, add web - "Spring Web" ...

Glide is an open source image loading library for Android, which can help us download, cache and display images in various formats. It is also one of the mainstream image loading frameworks. How to realize the internal source code? Explain the main process and make a brief analysis. The usage is as follows: Glide.with(context).load(url).into ...

KingbaseES logical backup and restore tool provides online backup and restore function at database object level. Backup objects include: database pattern surface view constraint jurisdiction trigger function sequence The output format of logical backup includes: Binary SQL script In addition, for table data, it also supports the e ...

Six principles of design mode 1. Purpose of design mode Design pattern is for better code reusability, readability, reliability and maintainability. 2. Six commonly used design modes 1) Single responsibility principle 2) Richter's substitution principle 3) Dependency Inversion Principle 4) Interface isolation principle 5) Dimitt's law 6) Open ...

Here, I use the jar package spring boot starter data redis of redisTemplate combined with spring boot framework, which is introduced in the way of POM. The introduction code is as follows: <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <versi ...