louis-wu

#content
  .left.column
    %h2 Welcome to our site!
  .right.column
    #users
      {{#users}}
        %p {{user}}
      {{/users}}

louis-wu

# 2010-10-01
#
# Mac OS X 10.6.3
# Homebrew 0.7
# Xcode 3.2.4
# Git 1.7.3.1
# RVM 1.0.12
# Ruby 1.9.2, 1.8.7
# Rails 3.0.0
# Passenger 3.0.0.pre4

louis-wu

require 'rubygems'
require 'stemmer'
require 'classifier'

class LedeClassifier
  
  attr :classifier

  def initialize(sections, n)
    @classifier = Classifier::Bayes.new(*sections)

louis-wu

class Stack
  attr_reader :stack
  def initialize
    @stack = []
  end
  def peek(obj)
    @stack.push(obj)
  end
  def pop
    @stack.pop

louis-wu

#http://github.com/mislav/will_paginate

>> a = Array.new(100) {|n|n}
=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]
>> require 'will_paginate/array'
=> true
#WillPaginate默认为每页30个对象
>> a.paginate
=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29]
#显示第二页

louis-wu

#JSON is frequently used to exchange data between JavaScript running in browsers and server-based applications

#把hash或array的数据结构转换成字符，并把字符写入文件
>> require 'json'
=> true
>> data = { :name => 'louis', :address => ['Suzhou', 'China'], :age => 30}
=> {:address=>["Suzhou", "China"], :age=>30, :name=>"louis"}
>> serialized = data.to_json
=> "{"address":["Suzhou","China"],"age":30,"name":"louis"}"
>> File.open('data.txt', 'w') do |f|

louis-wu

#当你把照相机接入电脑时，照片文件夹为F盘。下面的程序对照片进行批量重命名。

pic_names = Dir['F:/**/*.{JPG,jpg}']
puts 'What would you like to call this batch?'
batch_name = gets.chomp
puts
print "Downloading #{pic_names.length} files: "
pic_number = 1                   #这是计数器，我们从1开始计数
pic_names.each do |name|
  print '.'                        # 这是进度条.

louis-wu

#---
#YAML is a format for representing objects as strings.
#YAML is nice because it’s human-readable
#---

#YAML::dump: convert your Person object array into YAML data

>> require 'yaml'
=> true
>> class Person

louis-wu

#---
# Ruby Facts: Proc and Block
#---

#take a block of code (code in between do and end), 
#wrap it up in an object (called a proc), 
# store it in a variable or pass it to a method, 
#and run the code in the block whenever you feel like it
>> toast = Proc.new do
?> puts "cheers!"

louis-wu

#---
# Use sinatra to build a prototype of a catalog service to manage a list of products
# The actions we’d like to simulate: 
# HTTP Verb     URI                Action
# GET           /products          Returns a list of all products
# GET           /products/:id      Returns the product identified by :id
# POST          /products          Creates a new product
# DELETE        /products/:id      Deletes the product identified by :id
# Excerpted from "Enterprise Recipes for Ruby and Rails"
#---