WNut42

#!/usr/bin/env bash
# repository
cd /tmp
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -Uvh epel-release-6-8.noarch.rpm

# system update
yum -y update
yum -y groupinstall "Development Tools"
yum -y install libxslt-devel libyaml-devel libxml2-devel gdbm-devel libffi-devel zlib-devel openssl-devel libyaml-devel readline-devel curl-devel openssl-devel pcre-devel git memcached-devel valgrind-devel mysql-devel ImageMagick-devel ImageMagick

WNut42

// 循环队列的实现

package main

import (
	"fmt"
)

const MAXSIZE = 10

WNut42

Tmux 快捷键 & 速查表

启动新会话：

tmux [new -s 会话名 -n 窗口名]

恢复会话：

tmux at [-t 会话名]

WNut42

Rails Migration

http://guides.rubyonrails.org/migrations.html

Migrations methods:

• add_column
• add_index
• change_column
• change_table
• create_table
• drop_table

WNut42

#!/usr/bin/env ruby

# From my blog post at http://www.postal-code.com/binarycode/2009/06/06/better-range-intersection-in-ruby/

class Range
  def intersection(other)
    raise ArgumentError, 'value must be a Range' unless other.kind_of?(Range)

    my_min, my_max = first, exclude_end? ? max : last
    other_min, other_max = other.first, other.exclude_end? ? other.max : other.last

WNut42

string = 'hello world'

result = $& if string =~ /hell/
# 可以替换为：
result = string[/hell/]

result = $2 if string =~ /(\w+)\s(\w+)/
# 可以替换为：
result = string[/(\w+)\s(\w+)/, 2]

WNut42

#
# 实现简单的二分查找（递归）：
#
# 给定一个数和有序数组，返回该数在数组中的下标
#

class BinarySearch

  attr_accessor :origin_array

WNut42

#!/usr/bin/env ruby

top = binding

loop do
  p eval(gets, top)
end

WNut42

class Book < ActiveRecord::Base
  # extends ...................................................................
  # includes ..................................................................
  # security (i.e. attr_accessible) ...........................................
  # relationships .............................................................
  # validations ...............................................................
  # callbacks .................................................................
  # scopes ....................................................................
  # additional config .........................................................
  # class methods .............................................................

WNut42

require "rubygems"
require "geminabox"

Geminabox.data = "/var/geminabox-data" # …or wherever

use Rack::Auth::Basic, "GemInAbox" do |username, password|
  'your massively secure password' == password
end

run Geminabox