#encoding: utf-8

require 'net/http'
require 'open-uri'
require 'nokogiri' # 用于解析html的模块# sudo apt-get install libxslt-dev libxml2-dev # sudo gem install nokogiri
require 'pathname'class JanDanSpiderattr_accessor :base_uri, :cur_page # 定义属性访问器def initialize(pagesize)@base_uri = 'http://jandan.net/pic' # @表示实例变量、@@表示类变量、$表示全局变量@dir = '/media/Develop/MyCode/SevenLang/ruby/pic'@pagesize = Integer(pagesize) # 整型转换
    enddef crawl()Dir.mkdir @dir unless File.directory? @dir # 表判断的方法结尾都有个?totalpage = crawlpage(0)puts "pagesize #{totalpage}" # ""字符会引发字符串替换，''则不会(1..@pagesize-1).each do |i| # 遍历元组crawlpage(totalpage - i)endputs 'complete!'enddef crawlpage(page)url = page==0 ? @base_uri : @base_uri+'/page-'+page.to_s # to_s是必要的puts "crawl-page: #{url}"fpage = open(url)html = fpage.readdoc = Nokogiri::HTML(html)doc.css('ol.commentlist li').each { |comment|match = /comment-(\d+)/.match(comment['id'])if matchid = match[1]oo = Integer(comment.css('#cos_support'+'-'+id)[0].content);xx = Integer(comment.css('#cos_unsupport'+'-'+id)[0].content);xx = 1 if xx==0if(oo>xx && (oo>200 || oo/xx >10) )src = comment.css('p img')[0]["src"]puts "crawl: oo #{oo} xx #{xx} src #{src}"save_pic(src)endend}if page==0cur_page = doc.css(".current-comment-page")[0].contentpage = Integer(/\d+/.match(cur_page).to_s)endputs "page #{page} done!"page # ruby中每条语句都有返回值，函数内最后一条语句的返回值会被return
    enddef save_pic(url)urlpath = Pathname.new(url)filename = urlpath.basename.to_sdirpath = Pathname.new(@dir)filepath = dirpath.join(filename).to_sopen(url) { |fin|open(filepath,"wb") { |fout|while buf = fin.read(4096) dofout.write bufend}} unless File.exists? filepath # 仅当文件不存在时进行抓取puts 'done!'endendif ARGV.length == 1spider = JanDanSpider.new($*[0]) # 可从 ARGV 或 $* 读取命令行参数
    spider.crawl()
elseputs 'please input pagesize' #tip: puts, 转义+换行符 print, 转义 p, 换行
end

 1 #python-string
 2 #python中的字符串用单引号''和双引号""标示
 3 strA = 'this is a string'
 4 strB = "this is a message!"
 5
 6 #打印两个字符串
 7 print("打印两个字符串")
 8 print('strA = ' + strA)
 9 print('strB = ' + strB)
10
11 print("#############################")
12
13 strC = 'I don\'t know anything'
14 strD = '\'Yes\',I know.'
15
16 print("字符串中的转移字符")
17 print('strA = ' + strC)
18 print('strB = ' + strD)
19
20 print("#############################")
21
22 strE = '这是我的blog，欢迎大家来\n我的博客园溜达'
23
24 print("字符串中的换行")
25 print('strA = ' + strE)
26
27 print("#############################")
28
29 strF = 'this is ''message'
30 strG = 'Hongten'
31 strH = strG * 3
32
33 print('字符串可以用\'+\'号连接(或者说粘合)，也可以用\'*\'号循环')
34 print('strF原有形式为：\'this is \'\'message\'')
35 print('粘合后的strF：' + strF)
36 print('strG原值为：\'Hongten\',strH = strG * 3,此时strH为：' + strH)
37
38 print("#############################")
39 strI = 'hongtenzone@foxmail.com'
40
41 print('字符串可以使用下标(索引)查询')
42 print('源字符串strI = \'hongtenzone@foxmail.com\'')
43 print('字符串strI的长度，len(strI) = ')
44 print(len(strI))
45 print('strI[0] = ' + strI[0])
46 print('strI[10] = ' + strI[10])
47 print('strI[-1] = strI[len(strI) - 1]')
48 print('strI[-1] = ' + strI[-1])
49 print('strI[len(strI) - 1] = ' + strI[len(strI) - 1])
50
51 print("#############################")
52
53 print('Python 字符串不能改写。按字符串索引赋值会产生错误:')
54 print('strI[0] = \'x\',这样就会产生错误啦')
55
56 print("#############################")
57
58 print('过大的索引代替为字符串大小，下界比上界大的返回空字符串')
59 print('strI[0:100] = ' + strI[0:100])
60
61 print("#############################")
62
63 print('索引可以是负数，计数从右边开始')
64 print('strI[-2] = ' + strI[-2])
65 print('strI[-23:] = ' + strI[-23:])
66
67 print("#############################")
68
69 print('不过-0 还是0，所以它不是从右边计数的！')
70 print('strI[0] = ' + strI[0])
71 print('strI[-0] = ' + strI[-0])

View Code

/** PROXY_HOST：代理的IP地址* PROXY_PORT_INT：代理的端口号*/Proxy proxy=newProxy(Proxy.Type.HTTP, newInetSocketAddress(PROXY_HOST, PROXY_PORT_INT));URL url=newURL(urlStr);URLConnection conn=url.openConnection(proxy);InputStream is=conn.getInputStream();

/*** 这里只实现垂直滚动*/
var parent = document.getElementById('parent');
var content = document.getElementById('content')
var startY = 0; // 初始位置
var lastY = 0; // 上一次位置parent.addEventListener('touchstart', function(e) {lastY = startY = e.touches[0].pageY;
});
parent.addEventListener('touchmove', function(e) {var nowY = e.touches[0].pageY;var moveY = nowY - lastY;var contentTop = content.style.top.replace('px', '');// 设置top值移动contentcontent.style.top = (parseInt(contentTop) + moveY) + 'px';lastY = nowY;});
parent.addEventListener('touchend', function(e) {// do touchendvar nowY = e.touches[0].pageY;var moveY = nowY - lastY;var contentTop = content.style.top.replace('px', '');// 设置top值移动contentcontent.style.top = (parseInt(contentTop) + moveY) + 'px';lastY = nowY;
});

/*** 这里只实现垂直滚动*/
var parent = document.getElementById('parent');
var content = document.getElementById('content')
var startY = 0; // 初始位置
var lastY = 0; // 上一次位置parent.addEventListener('touchstart', function(e) {lastY = startY = e.touches[0].pageY;
});
parent.addEventListener('touchmove', function(e) {var nowY = e.touches[0].pageY;var moveY = nowY - lastY;var contentTop = content.style.top.replace('px', '');// 设置top值移动contentcontent.style.top = (parseInt(contentTop) + moveY) + 'px';lastY = nowY;});
parent.addEventListener('touchend', function(e) {// do touchendvar nowY = e.touches[0].pageY;var moveY = nowY - lastY;var contentTop = content.style.top.replace('px', '');// 设置top值移动contentcontent.style.top = (parseInt(contentTop) + moveY) + 'px';lastY = nowY;
});