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
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
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
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
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 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
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
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
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
Introduction to Babel
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