PinnedJeffrey ChenAlgorithms and Data Structures — Solutions for the problems on LeetCode and HackerRankMany companies like to ask interviewees some Algorithms and Data Structures problems to check the programming skills in the interview…2 min read·Aug 1, 2021----
Jeffrey ChenDatabase — How to use the index in the SQL queryIndexes could be used for enhancing the SQL query performance, and user can build multiple indexes for a table. Then, how the query engine…2 min read·Jul 29, 2021----
Jeffrey ChenDatabase — Different kinds of IndexWhen you want to look up a word in the dictionary, you could use index page to find it out quickly. Database index is same idea, you can…2 min read·Jul 19, 2021----
Jeffrey ChenSource Code Tracing — Enable CORS in Spring BootCross-origin resource sharing (CORS) is a mechanism that allows a web page to request some resources in different domains. If you are…2 min read·Jan 30, 2021----
Jeffrey ChenSoftware Testing SummaryTesting is the process with the intention of finding defects in your system. Integrate right test in right development stage can help you…2 min read·Dec 27, 2020----
Jeffrey ChenCode Analysis Tool Integration Practice — Integrate SonarQube with JenkinsAfter you installed the SonarQube Server and integrated Sonar Scanner with your projects, you may want the code analysis step be executed…3 min read·Aug 2, 2020----
Jeffrey Chen[日本生活]如何用台灣駕照換日本駕照只要在台灣監理所申請駕照的日文譯本，你就可以在日本租車和駕駛，但是如果你在日本待超過一年，就不能再使用譯本了，這時候你就需要拿著你的台灣駕照去日本各地的運転免許センター換日本駕照。4 min read·Jul 21, 2020----
Jeffrey ChenSource Code Tracing — ResourceServerConfigurerAdapter and WebSecurityConfigurerAdapterYou can easily launch the Resource Server by the Spring Security and you can change some default configuration by…3 min read·Jul 18, 2020----
Jeffrey ChenSource Code Tracing — Spring Security OAuth Config / Exception HandlingIf you have spring-security-oauth2 on your classpath, it’s easy to set up Resource Server by auto-configuration. But I would like to…2 min read·Jul 12, 2020----
Jeffrey ChenCode Analysis Tool Integration Practice — Integrate SonarQube with your React/npm projectSonar do NOT provide the npm Sonar Scanner officially, however we still can find an unofficial one to help us to integrate SonarQube with…2 min read·Jun 28, 2020----
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