takehiko

takehiko

takehiko

takehiko

#!/bin/bash

# mcu.sh: Marble color unifier.
# (From "four bags with one red, one green, and one blue marble per bag"
# to "four bags with three marbles per bag")

# Downloads: Multiply_4_bags_3_marbles.svg
# Makes: 4x3_1.svg 4x3_1.png 4x3_2.svg 4x3_2.png
# Depends on: wget sed inkscape gm (GraphicsMagick)

takehiko

// server.js
//   パラメータ付きのGET/POSTメソッドを受け付ける小さなHTTPサーバ
// 実行方法
//   適当なディレクトリにこのファイルを置いて
//   npm init -y
//   npm install express
//   node server.js
//   別端末で
//     curl -X GET 'http://localhost:8080/?abc=def'
//     curl -d ABC=xyz 'http://localhost:8080/'

takehiko

#!/usr/bin/env ruby

# qpr.rb : 四角形(Quadrilateral)の2辺の関係に基づき平行(Parallel)・
# 垂直(Right angle)の数を求め，2次元平面上に図形を描画する
#   by takehikom
# see also:
#   青山尚司「平行だけでなく，垂直も観点に加えた四角形の弁別より」,
#   算数授業研究, Vol.137, pp.58-59 (2021). [isbn:9784491046365]

class QPR

takehiko

#!/usr/bin/env ruby

# polygon-plotter.rb : A calculator of polygonal coordinates
#   by takehikom
# see also:
#   https://takehikom.hateblo.jp/entry/2021/05/14/073039
#   https://takehikom.hateblo.jp/entry/2021/05/15/073040

class PolygonPlotter
  def initialize(opt = {})

takehiko

#!/usr/bin/env ruby

# hexdot-generator.rb : A dot generator for math education
#   by takehikom
# see also: https://takehikom.hateblo.jp/entry/2021/04/25/082407

class HexdotGenerator
  def initialize(opt = {})
    @filename = opt[:file] || "hexdot.svg"
    setup

takehiko

;; M-x insert-timestamp-default (またはM-x its)で Wed Feb 17 22:18:46 2021
;; M-x insert-timestamp-htmlcomment (またはM-x itsh)で <!-- 2021-02-17 22:18:52 +09:00 --> (と改行)
;; M-x insert-timestamp-unixtime (またはM-x itsu)で 1613567937
;; M-x insert-timestamp-iso (またはM-x itsi)で 2021-02-17T22:19:01+09:00

(defun insert-timestamp-default ()
  "Insert the current timestamp"
  (interactive)
  (insert (current-time-string)))
(defalias 'its 'insert-timestamp-default)

takehiko

#!/usr/bin/env ruby

# radicalfinder.rb : 部首と同じ字形の漢字を求める
#   by takehikom

require "roo" # gem install roo

class Radicalfinder
  def initialize(opt = {})
    @opt_kyoikukanji_only = opt[:kyoiku]