Tag：plan
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Leetcode dynamic planning I: basic framework
Dynamic planning framework Dynamic programming The general form of dynamic programming problem isMaximize – > exhaustive The exhaustive characteristic of dynamic programming lies in the existence of such problemsOverlapping subproblem, if violence is exhausted, efficiency is extremely low. Therefore, generallymemorandumperhapsDP tableUse space to optimize the exhaustive process and avoid unnecessary calculation. Three elements of dynamic […]
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Is the saying “agile projects are faster than traditional projects” right?
In fact, agile projects are more flexible than traditional projects. Because agile projects can verify and correct problems while implementing, for projects with unclear scope of requirements and many changes in requirements, they can respond to and embrace changes to a large extent. For Internet products, the market direction changes rapidly, and a timely and […]
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Greatsql heavyweight feature, InnoDB parallel query optimization test
Welcome to the MySQL technical articles shared by the greatsql community. If you have any questions or want to learn, you can leave a message in the comment area below, and you will answer it after you see it The original content of greatsql community cannot be used without authorization. Please contact the editor and […]
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“Sofa planet” breakthrough plan – layotto spacecraft
For specific task information, please click the “sofa planet” breakthrough plan
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Troubleshooting of slow operation of mongodb find getmore
This article is from the work that won the shortlisted case award of “2021mongodb technology practice and application case solicitation activity” Author: zhangjiaqiao Problem description This article introduces a detailed process and solution to help businesses troubleshoot the problem of slow online query operation. Business is using find () The limit() command encounters a jam […]
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Tgip-cn 036 registration ｜ prediction 2022 · Apache pulsar technology progress and community dynamics
About tgip Tgip is the abbreviation of thank God it’s pulsar, inspired by thank God it’s Friday of Google team. It says that the work week is coming to an end, and there will be a happy weekend soon. Tgip is mainly to popularize some basic concepts about pulsar. You can get them from tgip […]
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Nest+vue practice: work plan management system
Original blog and update address:Nest+vue practice: work plan management system preface The project is learningNest.jsFrom the framework, the front end is based on vue JS + vuex + vuerouter + elementui + SCSS. The backend is based on node js + TypeScript + Nest. js + MySQL + TypeORM。 preview function user Register, log in, […]
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OSCs official announcement goes online! Let’s unlock the open source security ecological protection plan!
background According to the survey data of China information and Communication Research Institute, the proportion of Chinese enterprises using open source technology reached 82.2% in 2020, and the use of open source technology by Chinese enterprises has become the mainstream.By 2021, open source has ushered in its highlight moment, which has been explicitly listed in […]
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Spark outer join push down filter rule
background For different join operations of spark, some predicates can be pushed down, but some predicates cannot. Today, let’s conduct field operations and analyze the phenomenon and source code level to see what’s going on. Version & Environment spark 3.2.0 macbook pro theoretical basis 1. referencehive OuterJoinBehavior Let’s explain a few nouns: Preserved row tableReturns […]
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Deep parsing polardb Database Parallel Query Technology
Introduction: with the continuous expansion of data scale, the execution time of user SQL is getting longer and longer, which not only puts forward higher requirements for the optimization ability of the database, but also puts forward new challenges for the execution mode of the database. This paper will introduce the key problems and core […]
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Flutter 2022 product roadmap release
In order to improve the transparency of the product, at the beginning of each year, the flutter team will release this year’s product roadmap to help the teams and developers using flutter make plans according to these priorities. In 2022, the flutter team will focus on product development and improvement by focusing on the following […]
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[transfer] detailed explanation of the parsing process of spark SQL initial experience
I haven’t updated my blog for a long time. I learned some R language and machine learning content and took some notes. Later, I will put them on my blog for everyone to share. I planned to update spark SQL a month ago because some other things were delayed. Today, I’ll simply write something, spark1 […]