Seki's note

Show mouse and touch events in the HTML canvas element

For showing the handling of mouse and touch events in the HTML canvas element, I created a JavaScript program that draws a line while displaying the name and position of the event that occurred.

UNSODA viewer

15 Puzzle

Play 15 puzzle.

How to open a file from a terminal emulator

This article describes how to open a file from a terminal emulator in Mac, Linux, and Windows.

Uploading many files to GitHub repository

As GitHub introduced unlimited private repositories, I uploaded gigabytes of data to GitHub repository. Here is some technical notes for uploading many files to GitHub repository.