masui

fs = require 'fs'

readFile = (filename, enc) ->
  new Promise (fulfill, reject) ->
    fs.readFile filename, enc, (err, res) -> # readFile()は非同期関数                                                                                                                                        
      if err
        reject err
      else
        fulfill res

masui

#                                                                                                                                                                                                    
# https://blog.svpino.com/2015/05/08/solution-to-problem-5-and-some-other-thoughts-about-this-type-of-questions                                                                                      
#                                                                                                                                                                                                    
def power(len, sels, arr=[], &block)
  if len == 0 then
    yield arr
  else
    sels.to_a.each { |sel|
      power len-1, sels, arr + [sel], &block
    }

masui

1.upto(1000) do |c|
  1.upto(c-1) do |b|
    1.upto(b-1) do |a|
      next if a + b + c != 1000
      next if a * a + b * b != c * c
      puts "#{a}^2 == #{b}^2 + #{c}^2"
    end
  end
end

masui

#                                                                                                                                                                                                    
# https://blog.svpino.com/2015/05/08/solution-to-problem-5-and-some-other-thoughts-about-this-type-of-questions                                                                                      
#                                                                                                                                                                                                    
def power(n, alts, &block)
  _power(n, 0, [], alts, &block)
end

def _power(total, level, res, alts, &block)
  if level < total then
    alts.each { |op|

masui

#                                                                                                                                                                                                    
# https://blog.svpino.com/2015/05/08/solution-to-problem-5-and-some-other-thoughts-about-this-type-of-questions                                                                                      
#                                                                                                                                                                                                    
def power(level, a, &block)
  if level > 0 then
    ['+', '-', ''].each { |op|
      a[level-1] = op
      power level-1, a, &block
    }
  else

masui

(1..1000).each { |i|
  (1..1000).each { |j|
    (1..1000).each { |k|
      next if j <= i
      next if k <= j
      next if i+j+k != 1000
      puts "#{i}, #{j}, #{k}" if i*i + j*j == k*k
    }
  }
}

masui

(1..1000).each { |i|
  (1..1000).each { |j|
    k = 1000 - i - j
    next if j <= i || k <= j
    puts "#{i}, #{j}, #{k}" if i*i + j*j == k*k
  }
}

masui

puts "abc"

masui

File.open("/dev/input/event0","rb"){ |f|
  while true do
    s = f.read 16
    (time, type, code, value) = s.unpack "qssi"
    if type == 2 and code == 8 then
      puts value
    end
  end
}

masui

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <linux/input.h> // struct input_event とか                                                                                                                                

main()
{
  int mouse_fd = open("/dev/input/event0", O_RDONLY);
  if (mouse_fd < 0) {
    fprintf(stderr,"can't open mouse device\n");