risgk

# TYPES AND PROGRAMMING LANGUAGES by Benjamin C. Pierce Copyright (c)2002 Benjamin C. Pierce
# Excercise 3.5.17

class Array
  def isnumericval
    t = self
    case
    when t[0] == :zero
      true
    when t[0] == :succ

risgk

# Modifying http://www.cis.upenn.edu/~bcpierce/tapl/checkers/untyped/ for learning TAPL.
# TYPES AND PROGRAMMING LANGUAGES by Benjamin C. Pierce Copyright (c)2002 Benjamin C. Pierce

def isnamebound(ctx, x)
  if ctx[0].nil?
    false
  else
    y = ctx[0][0]; rest = ctx.drop(1)
    if y == x
      true

risgk

# Modifying http://www.cis.upenn.edu/~bcpierce/tapl/checkers/simplebool/ for learning TAPL.
# TYPES AND PROGRAMMING LANGUAGES by Benjamin C. Pierce Copyright (c)2002 Benjamin C. Pierce

# ------------------------   SYNTAX  ------------------------

# Context management

def addbinding(ctx, x, bind)
  [[x, bind]] + ctx
end

risgk

名古屋でRuby, パートI
September 11, 2013
@risgk

risgk

# Modifying http://www.cis.upenn.edu/~bcpierce/tapl/checkers/simplebool/ for learning TAPL.
# TYPES AND PROGRAMMING LANGUAGES by Benjamin C. Pierce Copyright (c)2002 Benjamin C. Pierce

# $ gem install case_class
# ref: http://github.com/mame/case_class
require "case_class"
# CAUTION: Monkey patching!
module CaseClass
  class Case < Struct
    def ==(obj)

risgk

Ruby x Arduinoでシンセサイザーを作ってみた

• 2015/03/28 浜松Ruby会議01

• Hamamatsu.rb 石垣 良

risgk

# ISGK Instrumentsの活動紹介

* 浜松IT合同勉強会 LT大会
* 2016/11/26(土) @risgk
    * <http://risgk.github.io/>

risgk

require_relative 'constants'

PSEUDO_SAW_STEPS = 16
REDUCE_OSC_TABLE_SIZE_1 = false

$file = File.open("osc-table.h", "w")

$file.printf("#pragma once\n\n")

def freq_from_note_number(note_number)