There are some tools to handle multi-version Node.js in Windows. In this article, I introduce nvm-windows. It is really easy to use, I think.
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(日本語) JSON をパースする方法
PostgreSQL: Show Column Values Vertically retrieved by SELECT SQL
Here, I introduce the way to show values vertically which are retrieved by SELECT SQL in PostgreSQL.
VirtualBox: Find Host IP Address from the Guest Machine (Linux) in NAT Connection
I wrote the way to check host machine IP address from VirtualBox guest machine connected as NAT. Substantially speaking, it is the gateway address of the guest machine.
History
When I launched Kotlin API server in Host, Windows, and Launched Rails Web application in Guest Linux, I needed to know the host machine IP address for accessing to the API.