shugo

module M1
  refine String do
    def foo
      "M1#foo"
    end
  end
end

module M2
  refine String do

shugo

module M
  refine String do
    def foo
      puts "foo"
    end
  end
end

def bar(&block)
  block.using(M)

shugo

Original

Rehearsal ---------------------------------------------------------
Hash aset               0.028307   0.003103   0.031410 (  0.031495)
Hash aref               0.010025   0.000005   0.010030 (  0.010047)
Hash delete             0.012342   0.000065   0.012407 (  0.012558)
AVLTree aset            0.528481   0.002488   0.530969 (  0.531534)
AVLTree aref            0.159875   0.000126   0.160001 (  0.160148)
AVLTree delete          0.575293   0.002389   0.577682 (  0.578515)

shugo

問題1. 選択肢の中からRubyの予約語ではないものを2つ選択してください。

• A.super
• B.begin
• C.try
• D.goto

---

問題2. 以下のコードを実行した出力として正しいものを1つ選択してください。

def foo (a, *b)
　p a

shugo

# mrblib/loops/master.rb

thermistor = Thermistor.new
led = Led.new(19)
led2 = Led.new(21)

while true
  puts "temperature: #{thermistor.temperature}"
  if thermistor.temperature > 30
    led.turn_on

shugo

require "fiddle"

LIBRUBY = Fiddle::Handle.new(nil)
RB_BACKREF_SET = Fiddle::Function.new(LIBRUBY["rb_backref_set"],
                                      [Fiddle::TYPE_VOIDP],
                                      Fiddle::TYPE_VOID)

def gsub_wrapper(str, re, &block)
  str.gsub(re) { |s|
    Thread.current[:backref] = Regexp.last_match

shugo

regular_file = "./regular"
symlinkfile = "./symlink"
File.delete(regular_file) rescue nil
File.delete(symlinkfile) rescue nil
File.open(regular_file, "w") {}
File.symlink(regular_file, symlinkfile)
p File.lstat(symlinkfile).atime

t = Time.local(2000)
stat = File.lstat(symlinkfile)

shugo

Content-Disposition: attachment; filename=%81w%92%E8%97%9D%8F%D8%96%BE%8E%E8%8FK%82%A2%81x%81i%8E%86%8F%91%90%D0%81{%93d%8Eq%8F%91%90%D0%81j.pdf; filename*=UTF-8''%81w%92%E8%97%9D%8F%D8%96%BE%8E%E8%8FK%82%A2%81x%81i%8E%86%8F%91%90%D0%81{%93d%8Eq%8F%91%90%D0%81j.pdf; filename="%81w%92%E8%97%9D%8F%D8%96%BE%8E%E8%8FK%82%A2%81x%81i%8E%86%8F%91%90%D0%81{%93d%8Eq%8F%91%90%D0%81j.pdf"

shugo

Content-Disposition:attachment; filename=%81w%92%E8%97%9D%8F%D8%96%BE%8E%E8%8FK%82%A2%81x%81i%8E%86%8F%91%90%D0%81{%93d%8Eq%8F%91%90%D0%81j.pdf; filename="%81w%92%E8%97%9D%8F%D8%96%BE%8E%E8%8FK%82%A2%81x%81i%8E%86%8F%91%90%D0%81{%93d%8Eq%8F%91%90%D0%81j.pdf"

shugo

module M
  refine String do
    def gsub(*args)
      super(*args) {
        yield $~
      }
    end
  end
end