HI group purchase system development (system development)

HashMap is stored using Hash table. In order to solve the conflict of Hash table, open address method and chain address method can be used to solve the problem. HashMap in Java adopts chain address method. Chain address method, in short, is the combination of array and linked list. There is a linked list structure on each array element. When th ...

Posted by Jonob on Wed, 25 May 2022 18:02:25 +0300

MySql advanced master-slave synchronization ☆

Master slave synchronization of MySql advanced 1. Replication overview This means that the master and slave databases can be synchronized again by transferring these data to the master and slave databases through the DDL. MySQL supports the replication of one master database to multiple slave databases at the same time. The slave database ca ...

Posted by upit on Wed, 25 May 2022 17:55:35 +0300

20211202 "Python Programming" Experiment 4 Python Comprehensive Practice Experiment Report

20211202 "Python Programming" Experiment 4 Python Comprehensive Practice Experiment Report   Course: "Python Programming"Class: 2112Name: Wang JinshuoStudent ID: 20211202Experimental teacher: Wang ZhiqiangExperiment Date: May 24, 2022Compulsory/Elective: Public Elective   1. Experimental content   1. Inspiration:        One ...

Posted by Mhz2020 on Wed, 25 May 2022 17:54:30 +0300

C language implementation of sequential list and linked list (single, single cycle and double cycle)

This blog is mainly about the implementation of sequence list and leading node linked list (single linked list, single cycle linked list and double cycle linked list). The code will also be attached to the last side of the linked list of non leading nodes.         1, Sequence table: a sequence table is a linear structure that uses a storage uni ...

Posted by netcoord99 on Wed, 25 May 2022 17:48:50 +0300

Observer and iterator patterns in RxJS

catalogue preface Observer mode Iterator mode Combination and implementation of two modes in RxJS Summary reference resources 1. Preface RxJS is a library that uses observable sequences to write asynchronous and event based programs. It combines observer mode, iterator mode and functional programming using sets to manage everything needed fo ...

Posted by txmedic03 on Wed, 25 May 2022 17:37:52 +0300

10 minutes to thoroughly understand the single page application routing

Last time, we popularized the custom routing routes of the applet and started the routing journey; Today, I'll take advantage of the trend to apply routing on a single page and chat with you for 50 cents. If you don't talk well... Return... A dollar? Single page application features Suppose: in a web page, there is a button. Click it to jump to ...

Posted by trellie on Wed, 25 May 2022 17:27:57 +0300

Detailed explanation of omnipotent Embedding 1 - Word2vec model & code implementation

Word2vec is a model proposed by Google in 2013, which trains word vectors from large-scale corpus. It is applied in many scenes, such as information extraction, similarity calculation and so on. Starting from word2vec, embedding has become popular in various fields, so word2vec is an appropriate opening. This paper hopes to give a more comprehe ...

Posted by Gordicron on Wed, 25 May 2022 17:17:02 +0300

LOJ3160 "NOI2019" Douzhudi

LOJ3160 "NOI2019" Douzhudi correct After thinking about it for a long time, I found that I didn't even think of the first step... I turned over the problem and found that people didn't bother to talk about this step... That is, after shuffling the cards, the probability of occurrence of each possible solution is the same. why…& ...

Posted by GreenMarch on Wed, 25 May 2022 17:09:30 +0300

Linux disk partition management

1, Introduction to disk partition Primary partition The basic partition is also called the primary partition. The total number of boot partition, each disk partition, primary partition and extended partition cannot be greater than four. The basic partition can be used immediately after it is created, but there is an upper limit on the number ...

Posted by ocd on Wed, 25 May 2022 17:03:25 +0300

RabbitMQ delay queue (Python version)

Author: Bge's blog Original link: https://blog.csdn.net/weixin_43437629/article/details/87196729 Recently, when I was doing a task, I encountered data that needed to be delayed. The first way is to store the data in the database, then write a script, scan the data table every five minutes, and then process the data. The actual effect is not goo ...

Posted by zeroecko on Wed, 25 May 2022 16:55:13 +0300