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

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

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

# 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

[1,2].tap {|arr| arr << 3}.display

maeharin

# 起動
$ ruby -r webrick -e 'WEBrick::HTTPServer.new(:DocumentRoot => "./", :Port => 8080).start'

# 停止
$ ps aux | grep ruby
$ kill -9 <pid>

maeharin

psql -U <username> -d <dbname> -c 'SELECT * FROM users where id > 10;' -A > log.txt

maeharin

ls | grep -e "[0-9]\{4\}" | xargs mv ../sandbox_daily/

maeharin

require 'optparse'

OptionParser.new do |o|
  o.on("-r") {puts 'read mode'}
  o.on("-w") {puts 'write mode'}
  o.on("-e") {puts 'edit mode'}                                                                                                                                                     
  o.on("-d") {puts 'delete mode'}
end.parse! ARGV

maeharin

<?php

function foo() {
    $args = func_get_args(); //可変長引数を配列で取得

    $v = array_shift($args);
    $callable = array_pop($args);

    $callable($v); //コールバック関数を呼び出し
}