Category：Blogs
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Time：2021-6-14
Hello, you brave little friends, Hello, I’m your mouth strong king small five, healthy, brain is not sick I have a wealth of hair loss skills, you can become a veteran It’s my main idea that I can write and discard as soon as I see it. It’s my characteristic to pick my feet when […]
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Time：2021-6-14
https://www.cnblogs.com/wt7018/p/11929359.html Mongodb aggregate 1、 Foundation 1. What is aggregation? Aggregation is an aggregation pipeline based on data processing. Each document passes through a pipeline composed of multiple stagesIt can group and filter the pipelines in each stage, and then output the corresponding results after a series of processing DB. Set name. Aggregate ({pipeline: […]
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Time：2021-6-14
In daily business development, order by is indispensable. But to write efficient sorting SQL, we need to spend some energy and time to understand the underlying principle of sorting, so as to find a good strategy to optimize the sorting. How to sort Index (index sort, best performance) Use index fields to sort as much […]
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Time：2021-6-14
The solution of cannot find package “GitHub. COM / go SQL driver / MySQL” in any of The main problem is lack of informationgo.modDocuments.To solve the problem, you need to initialize ago.modDocuments; Use the following command: go mod init Gone This work adoptsCC agreementReprint must indicate the author and the link of this article
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Time：2021-6-14
Update content After several months of development and debugging and internal online trial, it was finally released todayV2.1Version, it does not add some cross era features, but it is forV3.0The arrival of the version laid a good foundation. This week, we mainly improved the dependent version of some components, the minimum PHP Version (> = […]
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Time：2021-6-14
Video address Headline address:https://www.ixigua.com/i676544267458235648…Station B address:https://www.bilibili.com/video/av78062009?…Netease cloud classroom address:https://study.163.com/course/introduction…. Explanation content 1. The error is divided into two categories: recoverable error and unrecoverable error(1) Recoverable errors usually represent situations in which it is reasonable to report errors to the user and retry operations, such as files not found. Result < T, E > is used […]
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Time：2021-6-14
Installation of TinyMCE There are many online installation tutorials, and most of them are the same. I remember seeing an article about tinymece installation tutorial at the beginning. After collecting it, I never practiced it myself. As the Spring Festival is approaching, we all have a holiday. When we have a little spare time today, […]
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Time：2021-6-14
As the name suggests, a preprocessor is a program that processes our source code before compilation. There are many steps involved between programming and executing in C / C + +. Let’s take a look at these steps before we actually start learning about the preprocessor. You can see the intermediate steps in the […]
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Time：2021-6-14
In recent days, I always received some strange phone calls at home, “brother, you are XXX, we are XXX high-end men’s private club…”, holding grass, I was stunned at first, and then scolded back. Haughty face turned his head, with a smile slightly flattering: wife, listen to me, I really did nothing, you have to […]
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Time：2021-6-14
Business Tags: hospital information integration platform, Internet hospital, Internet nursing, chronic disease follow-up Technical labels: ESB, ETL + CDC, NLP, FAAS, SaaS, Hadoop, microservice Technology wechat group:Add wechat: wonter send: technical QMedical wechat group:Add wechat: wonter send: Medical Q —————— BEGIN —————— Analysis on the investigation scheme of Neusoft integration platform (1) […]
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Time：2021-6-14
Author:zzssdd2 E-mail：[email protected] 1、 Preface In the process of embedded development, we often print out some debugging information to debug parameters and find problems. Usually, I use the chip’s serial port hardware device with serial port assistant software to debug. But the PCB hardware design of this project does not reserve serial port debugging interface, so […]
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Time：2021-6-14
scene In the “school management system”, students, parents, teachers, educational administration may log in and do some of their own operations. These users need different attributes. For example, students have student numbers, but teachers don’t. Application users When coding, you often need to get the information of the current login user, which is the application […]
