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🌊 Author home page: 🏆 Hai Yong High quality creators in CSDN full stack field 🌊 About the author: 🥇 HDZ core group members 🥈 Ranked among the top 20 in the weekly list of station C 1. Design your console.log Although this is not necessary, do you think if you leave a colored egg message on the console of your personal website, it will ...

Official profile Koa is a new web framework built by the original team behind Express. It is committed to becoming a smaller, more expressive and more robust cornerstone in the field of web application and API development. By using the async function, KOA helps you discard callback functions and effectively enhances error handling. Instead of ...

3.bash configuration file There are many bash shell configuration files, which can be divided into the following categories 3.1 it is divided into two categories according to the effective scope Global configuration: for all users /etc/profile /etc/profile.d/*.sh /etc/bashrc Personal configuration: only valid for specific users ~/.bash_p ...

1, Context switch:          In concurrent programming, it is not that the more threads, the higher the efficiency. Too few threads may lead to insufficient utilization of resources. Too many threads may lead to fierce competition for resources, and then frequent context switching will cause additional ov ...

Take qq mailbox as an example To realize the mail function on the network, there must be a special mail server The mail server is similar to the real post office. It is mainly responsible for receiving the mail delivered by the user and delivering the mail to the e-mail of the mail recipient. 1. Zhang San connects to the SMTP server thr ...

MongoDB detailed syntax thinking map click here to download        With the diversified development of educational reform, school assessment methods are becoming more and more diverse. This also causes the results of the traditional course grade database table to no longer meet the setting of multiple assessm ...

1, Jenkins basic overview 1.1 what is Jenkins Jenkins is an open source continuous integration tool that provides a friendly operation interface. It is developed by JAVA. Jenkins is a scheduling platform that does not handle anything and calls third-party plug-ins to complete all work. Jenkins is an open source CI & CD software leader ...

1. Brief introduction ABP vNext encapsulates two event bus structures. The first is the local event bus implemented by ABP vNext itself, which cannot be published and subscribed across projects. The second is a distributed event bus, which ABP vNext encapsulates an abstraction layer to define itself and writes a basic implementation using Rabb ...

Principle of VUE data monitoring vue monitors all levels of data in the data How do I detect data in an object? adopt setter Implement monitoring, and in new Vue Pass in the data to be detected (1),Attributes appended to the object, vue Do not respond by default (2),To respond to the added attributes, use the following API: Vue.set ...

MongoDB sorting / indexing / aggregation / replication / fragmentation 1, MongoDB sorting (sort() method) In MongoDB, use the sort() method to sort the data. The sort() method can specify the fields to be sorted through parameters, and use 1 and - 1 to specify the sorting method, where 1 is ascending and - 1 is descending. The basic synt ...