Backup private key for MAC decentralized wallet development

1, Private key   in this lesson, we will continue to register the Token, which is to backup the private key. Each public chain will have a private key, but it is different. There are four private keys in MAC. namely Wallet Key Wallet key is one of the necessary information to open MAC wallet. ...

Posted by doodmon on Mon, 29 Jun 2020 10:36:56 +0200

Use TrueLicense in Spring Boot project to generate and verify License (Server License)

Article catalog 1, Introduction 2, Use TrueLicense to generate License 1, in pom.xml Add key dependencies to 2. Verify the user-defined License parameters 3. Add a Controller to generate certificate: 3, Using the keytool tool provided with JDK to generate public private key certificate Library 4, G ...

Posted by parboy on Tue, 23 Jun 2020 09:38:53 +0200

Enterprise practice (13) details of LVS load balancing DR (direct routing) mode

What is cluster A group of computers interconnected by a high-speed network and managed in a single system mode. Many servers are put together to provide the same service, which looks like only one server in the client. It can obtain relatively high benefits in performance, reliability and flexibilit ...

Posted by sone_br on Mon, 22 Jun 2020 07:03:24 +0200

Factory pattern of 23 design patterns - Java language-

Factory model core and its classification The core idea of the factory model: the separation of creators and callers Classification: Simple factory mode Factory method mode Abstract factory pattern Simple factory mode This pattern is the simplest way to manage object creation, because it simply en ...

Posted by wrapper on Sat, 20 Jun 2020 05:19:25 +0200

[Java] http connection using agent (example of integrating Alibaba cloud SMS service in Intranet environment)

1. Problem description I do project services: start in the Intranet environment, all links related to the Internet need to go through transparent agent.Alibaba cloud sdk: encapsulate all operations related to http. We can't configure HTTP related settings. To solve the problem 1: how can intranet serv ...

Posted by Simmo on Wed, 17 Jun 2020 07:11:50 +0200

In the past 520, what gifts are you giving? Python tells you with a visual chart

preface The text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. The annual 520 has just passed. Due to the impact of the epidemic, we missed this year's ...

Posted by transfield on Sat, 23 May 2020 09:52:22 +0200

BOM and DOM operations for JavaScript front-end development

[Directory] I. BOM Operation 1. window Object 2. window child object 3. Hisry Object 4. location object (master) 5. Pop-up box 6. Timer-related 2. DOM Manipulation 1. DOM-related concepts 2. Find labels 3. Node Operation 4. Get Value Operation 5. class, css operations   (Here's what you do with a browser in a mac notebook (check the con ...

Posted by timcapulet on Mon, 18 May 2020 18:20:38 +0200

How to find out the hard disk corresponding to the disk device in VMware virtual machine (Linux)

In VMware virtual machine (Linux), our Linux server may have multiple disks (or virtual disks), as shown below. The disks of this server include hard disk 1, hard disk 2 The hard disk 10 has a total of 10 hard disks.     In Linux system, the corresponding devices in the disk are as follows   [root@mylnx01 ~]# ls -lrt /dev/sd* brw-r----- 1 roo ...

Posted by jonybhi on Mon, 04 May 2020 22:34:19 +0200

golang validates the data format of struct field

Suppose we have the following structure: type User struct { Id int Name string Bio string Email string } We need to verify the validity of the fields in the structure: · the value of Id is in a range. · the length of Name is in the range of none. · Email format is correct. We might writ ...

Posted by brent123456 on Mon, 04 May 2020 08:10:43 +0200

Angular2 configuration Electron project (desktop cross platform)

Electron A desktop cross platform framework. In order to be able to use TypeScript for development, so the integration of configuration Configuration process To create an Angular2 project ng new ang-electron2 *cd enters the project file after creation npm install electron --save-dev --save-exact In the project, we need to Electro ...

Posted by Redlightpacket on Thu, 30 Apr 2020 17:55:55 +0200