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In parallel programming, we often encounter the problem of operating shared sets among multiple threads. In many cases, it is difficult for us to avoid this problem and achieve a lockless programming state. You also know that once the shared sets are locked, the concurrency and scalability will often have a great impact. This article will talk ...

Why climb the weather? 1. You can practice. 2. After using the itchat library to realize the function of automatic reply, integrate the function of weather check, and realize the function of wechat self-service weather check! First of all, it's a similar pattern. Let's see if we can grab a general API directly on the official website (XHR). The ...

PHP uses asymmetric encryption algorithm (RSA) In the daily design and development, in order to ensure the security of data transmission and data storage, the clear data can be encrypted into complex ciphertext by specific algorithm. At present, the mainstream encryption methods can be roughly divided into one-way encryption and two-way encryp ...

Use fonts in Android O XML 2017/9/25 20:14:35 Android 8.0 introduced a new feature, fonts in XML, that allows you to use fonts as resources.This means that you no longer need to bundle fonts as assets.Fonts are compiled in R files and, as a resource, are automatically used on the system.You can then access these fonts using a new resour ...

PHPer engaged in the financial industry has frequent capital calculation. If you don't pay attention to it, you may lose hundreds of thousands or even worse... Let's take an example: javascript Why is 0.1 + 0.2 not equal to 0.3? (correct result: 0.3000000000000004) Why is 0.8 * 7 not equal to 5.6? (correct result: 5. ...

Option interface Differences between ioptionsnapshot and IOptionsMonitor Post configuration of options Validation of options In ASP.NET Core note (3) - configuration, various configuration providers and configuration reading methods are introduced. However, in practice, it is not recommended to read applications directly from a heap of config ...

Recently, tiktok tiktok tiktok has seen all kinds of billboard data visualized video. As a technician, it is considered a very interesting way to present data. So searching the Internet for information, we found that there is a list of sound suitable for data visualization. Who is it? objective Tiktok pop star list Data visualization shows ...

In the last article, we introduced a logistics service provider. We recommend you to use Express Bird Interface. It mainly describes how to register an account, get a key, and find a registered address. I'll send it: http://kdniao.com/reg Today we're going to talk about how to use the interface provided by courier birds for instant queries. ...

How to use elastic search in combination with java? I don't need to talk much about it. Load it!!!   Integrating Spring Data ElasticSearch 1, How to view official documents Official documents: https://www.elastic.co/cn/elastic-stack (follow the steps below to choose another version) Skip 6.3.0 document directly: https://www.ela ...

1. Kafka message producer 1) Create the springboot Kafka producer demo project and import the jar package. <dependency> <groupId>org.springframework.kafka</groupId> <artifactId>spring-kafka</artifactId> <version>2.4.5.RELEASE</version> </dependency> 2) Add Kafka producer configuration it ...