Homebrew package manager

Homebrew Package manager [toc] I. Introduction Homebrew It is a package manager under Mac OS X, which is equivalent to yum and apt-get under Linux. Homebrew It is easy to download and install applications, and it is no longer necessary to search for various installation packages by hand. Be careful: Homebrew With Mac OS X MacPorts Package Mana ...

Posted by Taro on Sun, 15 Sep 2019 14:49:19 +0200

EMQX > > MQTT > AUTH > Authentication/Access Control II (EMQX-AUTH-Mysql)

EMQ X Auth & ACL Based on MySQL Before reading this tutorial, assume you already know it. MQTT,MQTT 5 And EMQ X Simple knowledge. emqx-auth-mysql It achieves access control to terminals by checking whether the username and password accessed ...

Posted by LAEinc. Creations on Fri, 06 Sep 2019 12:30:21 +0200

Block entry 2--LOJ

Topic link https://loj.ac/problem/6278 Memory limit: 256 MiB time limit: 500 ms Topic Description Given a long n sequence and n operations involving interval addition, the number of elements less than a certain value x in the interval is asked ...

Posted by nathanblogs on Thu, 05 Sep 2019 10:28:53 +0200

web crawler explanation - urllib repository crawler - state - exception handling - browser masquerading technology, user agent settings

If the crawler does not have exception handling, the program will crash and stop working if an error occurs during the crawl, and exception handling will continue even if an error occurs 1. Common status codes 301: Redirect to a new URL, permanent302: Redirect to temporary URL, not permanent304: Requested resource not updated400: Illegal reque ...

Posted by Quinton1337 on Wed, 28 Aug 2019 01:20:06 +0200

Postman Use Skills 1

Background: Last video introduced several mainstream tools, among which postman is lightweight and easy to use. It is recommended that novices can learn from postman. When using any tool, we should develop some good habits, postman is the same. ...

Posted by AshrakTheWhite on Fri, 23 Aug 2019 12:02:51 +0200

SpringBoot(15) @ Conditional annotation

# SpringBoot(15) @ Conditional annotation Function @Conditional is a new annotation provided by Spring 4. Its function is to judge according to certain conditions and register beans for containers only when the conditions are met. I. Overview ...

Posted by afrim12 on Wed, 21 Aug 2019 14:46:44 +0200

Summary of Network Programming

Catalog 1.C/S B/S Architecture 2. Principle of Network Communication 3.osi seven-tier protocol 4.UDP TCP Protocol 5. Three Handshakes and Four Waves of TCP Protocol 6.socket socket 7. Simple socket communication based on TCP protocol 8. socket Loop Communication Based on ...

Posted by FRSH on Sat, 17 Aug 2019 10:58:56 +0200

Docker security (container resource control using Cgroups mechanism)

Article Directory Preface Understanding docker security Namespace Isolated Security Security of Control Group Resource Control Kernel Capability Mechanisms Docker Server Protection Other security features Container Resource Control CPU bound Memory Limit Block IO Restrictions https://www.cnblog ...

Posted by sumathi on Sat, 10 Aug 2019 03:07:35 +0200

Java - Factory Design Patterns

Polymorphism: Method Polymorphism Method overloading 2. Method overwriting Object polymorphism 3. Inheritance of abstract classes 4. Implementation of Interface Coupling: When the code changes, the client needs to adjust accordingly. Factory design pattern: 1. Simple Factory Mode (Defining a ...

Posted by 758 on Fri, 02 Aug 2019 05:12:56 +0200

Record the details of a kaggle-based game, time series segmentation, feature construction, missing value processing

Record the details of a kaggle-based game, time series segmentation, feature construction, missing value processing. Preface data processing Treatment of missing values Model Construction Training Section Preface This time, I participated in a credit card fraud prediction project on kaggle. I ...

Posted by HA7E on Wed, 31 Jul 2019 11:55:57 +0200