Etaifang mining source code: ethash algorithm

Chain customer, specially for developers, there are questions to answer! This article is from Block Chain Technology Community No reprinting without permission. EthashWe analyzed the source code of the mining in Yitaifang, dug a pit of consensus engine, and studied the algorithm of DAG directed acyclic graph, which are the basis of Ethash. Etha ...

Posted on Thu, 26 Sep 2019 02:16:03 -0700 by suncore

Patent Network Digital Verification Code Recognition

1, background Project Requirements: Identify Patent Web Query Page Digital Verification Code Patent Search Website: http://cpquery.sipo.gov.cn/ The project needs to crawl the website. The landing page of the website is as follows: Figure 1 Home page login When public queries are logged in, the ...

Posted on Wed, 25 Sep 2019 05:05:36 -0700 by jug

Algorithms (an article on greed)

In the past two years, what is the most popular thing is artificial intelligence. Schools, courses, companies and even training institutes are flocking to it. This kind of behavior is not bad. But when people all come in, their real market, real landing, real value and real demand force wave after wave ...

Posted on Wed, 25 Sep 2019 04:21:54 -0700 by callesson

How to stitch GET request parameters

In the process of interface testing, I wrote a string replacement method to handle parameter splicing of get interface, and then optimized this method, which is compatible with Chinese character prompting for illegal characters, using the urlencode method that comes with java.Include the first method, which was previously passed by json.Share t ...

Posted on Mon, 23 Sep 2019 19:53:39 -0700 by MrAlaska

java Design Patterns Series 2

Singleton mode Definition and characteristics of singleton pattern Structure and Implementation of Singleton Model The structure of the singleton pattern Implementation of singleton pattern Application examples of singleton pattern Application scenarios for singleton patterns Extension of the singl ...

Posted on Mon, 23 Sep 2019 02:22:13 -0700 by NoMansLand

Climb QQ Music Designated Songs

Analysis of QQ Music Website 1. Analysis of Song Information InterfaceThrough QQ music search for designated singers or songs, the page data resources are analyzed.Press the f12 Developer Tool, click on the network to find the page data interfaceCopy the interface address to the postman tool for reque ...

Posted on Mon, 23 Sep 2019 02:01:41 -0700 by tonga

TCP network communication (multi-process, multi-thread, thread pool)

TCP Network Communication Preparatory knowledge Socket: In TCP/IP protocol, IP address + TCP port number or UDP port number uniquely identifies a process in network communication. IP address + port number is called socket. Network byte order: When learning C language, we should all know the problem of b ...

Posted on Mon, 23 Sep 2019 01:31:47 -0700 by bundred

OkHttp Source Analysis OkHttpClient, Request, Call, Dispatcher

The article was first published on a personal blog https://www.nullobject.cn The public number NullObject is updated synchronously. This article mainly introduces OkHttpClient, Request, Call, Dispatcher, Response and other classes.Article based OkHttp3.14.3 Edition 0. description Last article OkHttp Source Analysis (1) Simple Analysis of Reque ...

Posted on Sun, 22 Sep 2019 07:10:34 -0700 by phpzone

Cache cache (car cleaning)

When I first came into contact with Cache, it was in WebForm. When I first came into contact with Cache, I never forgot that cache was the Pinyin for car cleaning. Client Browser Cache https://blog.csdn.net/y874961524/article/details/61419716 CDN Caching Principle https://www.cnblogs.com/shijingxiang/articles/5179032.html Aliyun CDN Open Set ...

Posted on Sat, 21 Sep 2019 07:43:45 -0700 by notsleepy

Flink Learns from 0 to 1 - Flink Profile Details

We already know what Flink is in the previous article. After installing Flink, let's look at the configuration file under the installation path. Installation directory includes flink-conf.yaml configuration, log configuration file, zk configuration, Flink SQL Client configuration. flink-conf.yaml Basic configuration # jobManager's IP address ...

Posted on Fri, 20 Sep 2019 22:48:12 -0700 by Maeltar