Operations and Maintenance Scheduling Scenario Series - Daily statistics of the number of multiple running states for multiple regions and multiple instances

Application scenarios When an account has one or more Regions, and each Region has multiple instances. You need to customize the specified time to view the running status of all instances under all Regions or all instances of a specified part of Regions, count the number of instances, and notify the designated user of the output report in the ...

Posted on Thu, 15 Aug 2019 23:40:27 -0700 by patsman77

Build a full stack application using MongoDB, React, Node and Express (MERN)

Original: Let's build a full stack MongoDB, React, Node and Express (MERN) appAuthor: jelo riveraTranslator: BoxuanIn order to ensure the readability of the article, free translation is adopted instead of literal translation. When I want to move from front-end developers to full stack developers, it's hard to find an article that contains all ...

Posted on Thu, 15 Aug 2019 05:36:59 -0700 by wilorichie

Deep Understanding of Promise-Promise's Characteristics and Methods

What is promise? Promise, which means to promise you a result after a period of time (usually an asynchronous operation), is a solution to asynchronous programming. Grammatically speaking, native Promise is an object from which messages for asynchronous operations can be obtained. Characteristics of promise The state of the object is not affect ...

Posted on Thu, 15 Aug 2019 03:14:32 -0700 by koldstar

Advanced usage of doT and use of loadData

This article is from APICloud official forum.Thank you for sharing gp3098. The template was written directly in the script tag at the bottom of the page, but now it's different. Using the loadData method of doT.js and api, the whole page is a template. In the past, when opening frame or window, I didn't understand how url and data work together ...

Posted on Mon, 12 Aug 2019 03:02:43 -0700 by somethingorothe

SpringBoot 2.0 Base Case (03): Configure system global exception mapping handling

1. Classification of Exceptions From the point of view of handling exceptions by the system, there are two main categories of exceptions: business exceptions and system exceptions. 1. Business Exceptions Business exceptions are mainly some predictability exceptions. Handle business exceptions to prompt users for operation and improve the opera ...

Posted on Fri, 09 Aug 2019 11:18:33 -0700 by wilburforce

How to dynamically parse Schema of JSON data from Kafka by schema_of_json method in Structured Streaming

How to parse Schema of JSON data from Kafka in Structured Streaming In actual production, the fields in the message may change, such as adding one more field or something, but the Spark program can't stop. So consider that instead of customizing the Schema in the program, infer the Schema through the ...

Posted on Thu, 08 Aug 2019 23:52:18 -0700 by newbienewbie

Can Python still work like this? Encrypted file, unbreakable!

In life, sometimes we need to encrypt some important files. Python provides easy-to-use encryption libraries such as hashlib and base64. * * But for everyday learning, we can use XOR operation to implement a simple file encryption program, thus strengthening our programming ability. Remember to add an a ...

Posted on Wed, 07 Aug 2019 06:15:05 -0700 by phpwannabe25

[Python] Python 3 Network Crawler Actual Warfare-44, Identification of Verification Code for Point Contact Selection

In the last section, we realized the recognition of the test verification code, but there is another common and widely used test code besides the test. The more representative one is the touch verification code. Maybe you are unfamiliar with the name, but you must have seen similar authentication codes, ...

Posted on Wed, 07 Aug 2019 01:24:17 -0700 by gp177

kubernetes CRD Development Guide

Extending kubernetes is the two most commonly used and most needed things to master: custom resources CRD and adminsion web hook. This article teaches you how to master CRD development in 10 minutes. kubernetes allows users to customize their own resource objects, just like deployment stateful settings, which are widely used. For example, prome ...

Posted on Wed, 07 Aug 2019 00:54:09 -0700 by jstinehelfer

Detailed examples of introductory development of Babel plug-ins

Introduction to Babel Babel is a Javascript compiler, a code-to-code compiler, commonly known as a "conversion compiler". Babel's working process Babel has three main processes: parse, transform and generate. Code parsingAST is constructed by lexical analysis and grammatical analysis. Code ConversionProcessing AST, processing tools, ...

Posted on Tue, 06 Aug 2019 20:19:11 -0700 by hi2you