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February 18, 2020Programming
How to Commit Gracefully on Git and Auto-generate the Changelog
Have you ever complained at work about other people's messy commits — no note on why or what each commit did? When contributing to open-source projects on GitHub, if your commit doesn't follow their template, your merge request won't be accepted. Messy commits not only affect others; at release time the changelog should be auto-generated, but commits not written per the rules can't be tallied automatically. So today I'll write about how to commit gracefully on Git and auto-generate the changelog. This article only focuses on the posture of committing; the commit command and other topics are not discussed for now.
ProgrammingDevelopmentCodeGitHubGit
February 17, 2020Programming
Spring Cloud Microservices Beginner Tutorial (2): Service Registration and Discovery — Eureka
This section starts from scratch: we create a new Maven multi-module project and complete a basic demo of Spring Cloud Eureka-based service registration and discovery. The demo uses the IntelliJ IDEA development environment. Create a new Maven project in IntelliJ IDEA with JDK 1.8. I prefer manual operations, so first create an empty Maven project with groupId net.renfei, artifactId cloud, and version 1.0.0.
ProgrammingDevelopmentJavaCodeOpen SourceSpring
February 10, 2020Programming
The window.opener Security Vulnerability and Using the rel=noopener Tag
Recently I updated my site's code to add the rel=noopener tag to friendly links and external links, so today let's discuss why we use the rel=noopener tag. In fact, this is a security vulnerability — JavaScript provides window.opener to get the Window object that created the window, and that's where the problem begins. Let's take it step by step.
ProgrammingDevelopmentCodeWebsiteOpsSecurity
February 7, 2020Programming
Spring Cloud Microservices Beginner Tutorial (1): Microservices Introduction
My personal blog site has always stuck to one major update per year, but this time I decided not to update it, because the next update would mean adopting microservices. Using a microservices architecture for a small site would be overkill, and it takes too much time and effort to maintain. So instead of rewriting my blog from scratch, I turned it into a tutorial series.
ProgrammingDevelopmentJavaCodeOpen SourceSpring
February 3, 2020Programming
[3] Scala Development Tutorial - Scala Basics: Variables and Constants
In "[2] Scala Development Tutorial - Scala Basics: Data Types" we discussed data types. This article will discuss variables and constants in Scala. Before learning how to declare variables and constants, let's first understand what variables and constants are: 1. Variable: A quantity whose value may change during program execution is called a variable, e.g., time, age. 2. Constant: A quantity whose value does not change during program execution is called a constant, e.g., the value 3, the character 'A'.
ProgrammingDevelopmentScalaCode
January 20, 2020Software
Dash For Mac OS X 5.1.0 [TNT]
Dash is an API documentation browser and code snippet manager. Dash helps you store snippets of code, and instantly search and browse docs for almost any API you might use.
ProgrammingDevelopmentJavaCodeOpsDatabaseMySQLIDEAOpen SourceGitHubGitMyBatisSQL.NETOracleLinuxSoftware
January 20, 2020Software
Navicat Premium 15.0.8 For Mac OS X [TNT]
Navicat Premium merges all Navicat versions into one ultimate version that can connect to MySQL, Oracle, and PostgreSQL. Navicat Premium lets users drag and drop tables and data from Oracle to MySQL, from PostgreSQL to MySQL, and from Oracle to PostgreSQL within a single client, and vice versa. In addition, batch jobs for different databases (such as printing reports in MySQL, backing up data in Oracle, and syncing data in PostgreSQL) can be scheduled and run automatically at specific times.
ProgrammingDevelopmentCodeDatabaseMySQLSQLSoftware
January 16, 2020Software
Navicat Premium 15.0.7 For Mac OS X [TNT]
Navicat Premium merges all Navicat versions into one ultimate version that can connect to MySQL, Oracle, and PostgreSQL. Navicat Premium lets users drag and drop tables and data from Oracle to MySQL, from PostgreSQL to MySQL, and from Oracle to PostgreSQL within a single client, and vice versa. In addition, batch jobs for different databases (such as printing reports in MySQL, backing up data in Oracle, and syncing data in PostgreSQL) can be scheduled and run automatically at specific times.
ProgrammingDevelopmentCodeDatabaseMySQLSQLSoftware
December 11, 2019Programming
[2] Scala Development Tutorial — Scala Basics: Data Types
From the table above we can see that everything in Scala is an object — there are no primitive types like in Java. Some concepts also differ from Java: Scala includes a few notions of 'nothingness' (Null, null, Nil, Nothing, None, and Unit). Null is a trait (if you're not familiar with traits, think of it as somewhat like an abstract class in Java). There does exist an instance of null.
ProgrammingDevelopmentScalaCode
December 10, 2019Programming
[1] Scala Development Environment Setup Tutorial — Using IntelliJ IDEA
On the IntelliJ IDEA startup screen, go to Configure → Plugins, type Scala in the search box, and install the Scala plugin; IDEA will ask to restart after installation for the plugin to take effect. Next, create a Scala project: click Create New Project, choose Scala on the left and IDEA on the right, click Next, name the project (here, HelloScala), then pick a storage location. If this is your first build, you'll also need to download the Scala SDK.
ProgrammingDevelopmentScalaCode