maeharin

# original: http://blog.udzura.jp/2011/02/08/rack-one-liner-server-simpler/

Rack::Server.new.tap{|a|                                                                                                                                                                             
  def a.app
    Rack::Directory.new(".") 
  end 
}.start

maeharin

# url: http://bugs.ruby-lang.org/issues/show/1393

class C                                                                                                                                                                                              
  def to_a; [1,2]; end
  def to_ary; [3,4]; end
end

c = C.new

# implicit（暗黙）

maeharin

grep -rs 'STDERR' ./ | grep -E 'active|action|railties|sinatra|rack'

maeharin

#!/usr/local/bin/ruby                                                                                                                                                               

if ARGV.count < 1 || ARGV.count >= 2
    raise '引数が不正です！第1引数に比較したいファイル名を指定してください'
end

file_name = ARGV[0]

full_path = {}
full_path[:a] = File::expand_path(file_name)

maeharin

<?php

class C
{
    public function foo() {
        echo "foo";
    }                                                                                                                                                                               
}

$c = new C();

maeharin

find ./ -name 'filename'
grep -irs 'query' ./

maeharin

ruby -ane 'puts $F[0]' hoge.txt > hoge2.txt

maeharin

#coding: utf-8                                                                                                                             

class M1
    def initialize(app)
        @app = app 
    end 

    def call(env)
        env = env + '1' 
        res = @app.call(env)

maeharin

ruby -r pp -e 'pp ENV.to_hash'

maeharin

ruby -r open-uri -e 'open("http://www.yahoo.co.jp") {|f| puts f.read.scan(/topics.+?>(.+?)</)}'