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All of my open source contributions. Below are some PRs which I categorize by a daily job of a software engineer.

• Added new APIs to Eclipse Collections which is formerly Goldman Sachs Collections.
• Added a command-line option for sbt-jmh to export JFR report.

• Resource leak
  • Akka cluster was not closed.
  • A Kafka producer was not terminated.
• Build failed
  • Oracle JDK license was changed.
• Others
  • One of Kafka's classes didn't initialize the parent class.

• Increased testing coverage and fixed build failed.

• Changed to lambda expressions for Java 8 SAM types at payal squbs.

• Improved docs for other learners.
• Fixed hyperlinks couldn't display correctly at source code.
• Fixed broken links which were caused by jekyll.

• Suggested jabba to add BellSoft's Liberica JDK since they're also a TCK certified OpenJDK.
• Suggested kafka-visualizer to package their code in Docker and deliver Docker image to Docker hub since not everyone has the JDK 9 locally.

• 2021
  • Things I Wish I'd Known About Elasticsearch When I Started (attendee: 48) at TWJUG-Lite
• 2020
  • Short and remote talk of Ktor client post (attendee: 21) at TWJUG-Lite
• 2019
  • How to contribute to (Scala) open source & my experience (attendee: 30) at Scala Taiwan
• 2017
  • Introduction to Scala (attendee:~50) at ITE Tech. Inc.
• 2016
  • Introduction to Scala (attendee: 30) at JCConf Taiwan
  • Scala & Spark in Performance Aspect (attendee: 36) at Scala Taiwan