小编nei*_*ion的帖子

如何解决Capybara的歧义？出于某种原因,我需要在页面中使用相同值的链接,但由于我收到错误,因此无法创建测试

Failure/Error: click_link("#tag1")
     Capybara::Ambiguous:
       Ambiguous match, found 2 elements matching link "#tag1"

我无法避免这种情况的原因是因为设计.我正在尝试使用右侧的推文/标签和页面左侧的标签重新创建推特页面.因此,相同的链接页面不可避免地出现在同一页面上.

有人可以解释计数草图算法的工作原理吗？例如,我仍然无法弄清楚如何使用哈希.我很难理解这篇论文.

我有一个link_to Rails助手,可以在单击时下载壁纸.但是图像正在浏览器中加载而不是立即下载.

<%= link_to "1920x1080", @download.wallpapers[1].wallpaper.url %>

但同时我有一个link_to Rails帮助程序,它可以下载.exe格式的屏幕保护程序,但是这里它的工作方式是:立即下载文件.

<%= link_to "720p", @download.screensavers.first.screensaver.url %>

我应该添加或执行哪些操作,以便图像不会在浏览器中打开,而是立即下载？

谢谢!

任何人都可以向我解释有损计数算法吗？它是一种用于查找流中项目频率的流式算法.谢谢.

可能重复:
如何在PHP中查找字符串的所有子字符串
查找列表的所有子集

如何计算字符串的所有可能子串？例如给出一个字符串ABCDE.所有可能的子串都将是

A,B,C,D,E,AB,BC,CD,DE,ABC,BCD,CDE,ABCD,BCDE,ABCDE

谢谢!伪代码将受到高度赞赏.:d

Twitter Stream API是否可以按位置字段过滤推文？正如您在下面的示例JSON条目中看到的那样,有"location":"philippines"字段 - 值.现在,我想要的是通过位置字段过滤来自该位置的推文.但是不要误会我的意思.我不是在谈论GEO标签过滤器.

这可能吗？

{"geo":null,"in_reply_to_screen_name":null,"truncated":false,"text":"RT @BreakingNewsPH: Typhoon hits Taiwan after pummeling Philippines: Typhoon Nanmadol slammed into\u2026 http:\/\/t.co\/rF3jbVU #breakingnews","in_reply_to_user_id_str":null,"contributors":null,"retweeted":false,"retweet_count":1,"entities":{"hashtags":[{"text":"breakingnews","indices":[120,133]}],"urls":[{"indices":[100,119],"display_url":"goo.gl\/fb\/JVdpj","expanded_url":"http:\/\/goo.gl\/fb\/JVdpj","url":"http:\/\/t.co\/rF3jbVU"}],"user_mentions":[{"indices":[3,18],"name":"Breaking News PH","screen_name":"BreakingNewsPH","id":190144401,"id_str":"190144401"}]},"coordinates":null,"retweeted_status":{"geo":null,"in_reply_to_screen_name":null,"truncated":false,"text":"Typhoon hits Taiwan after pummeling Philippines: Typhoon Nanmadol slammed into\u2026 http:\/\/t.co\/rF3jbVU #breakingnews","in_reply_to_user_id_str":null,"contributors":null,"retweeted":false,"retweet_count":1,"entities":{"hashtags":[{"text":"breakingnews","indices":[100,113]}],"urls":[{"indices":[80,99],"display_url":"goo.gl\/fb\/JVdpj","expanded_url":"http:\/\/goo.gl\/fb\/JVdpj","url":"http:\/\/t.co\/rF3jbVU"}],"user_mentions":[]},"coordinates":null,"place":null,"source":"\u003Ca href=\"http:\/\/www.google.com\/support\/youtube\/bin\/answer.py?hl=en&answer=164577\" rel=\"nofollow\"\u003EGoogle\u003C\/a\u003E","created_at":"Mon Aug 29 04:16:31 +0000 2011","in_reply_to_user_id":null,"user":{"listed_count":19,"favourites_count":0,"profile_sidebar_fill_color":"252429","location":"Philippines","profile_background_tile":false,"lang":"en","profile_link_color":"2FC2EF","description":"Follow us to receive round-the-clock Philippine Breaking News updates directly on your Twitter account!","default_profile_image":false,"default_profile":false,"verified":false,"profile_sidebar_border_color":"181A1E","notifications":null,"time_zone":"Hong Kong","created_at":"Mon Sep 13 05:14:02 +0000 2010","followers_count":804,"following":null,"profile_use_background_image":true,"profile_background_image_url_https":"https:\/\/si0.twimg.com\/images\/themes\/theme9\/bg.gif","profile_image_url":"http:\/\/a3.twimg.com\/profile_images\/1130204413\/breakingnewsph-logo-small_normal.png","show_all_inline_media":false,"follow_request_sent":null,"geo_enabled":false,"profile_background_color":"1A1B1F","protected":false,"contributors_enabled":false,"profile_background_image_url":"http:\/\/a1.twimg.com\/images\/themes\/theme9\/bg.gif","url":"http:\/\/www.breakingnews.ph","screen_name":"BreakingNewsPH","name":"Breaking News PH","friends_count":210,"profile_image_url_https":"https:\/\/si0.twimg.com\/profile_images\/1130204413\/breakingnewsph-logo-small_normal.png","id":190144401,"id_str":"190144401","is_translator":false,"statuses_count":51981,"utc_offset":28800,"profile_text_color":"666666"},"in_reply_to_status_id":null,"favorited":false,"id":108030240370073602,"possibly_sensitive":false,"in_reply_to_status_id_str":null,"id_str":"108030240370073602"},"place":null,"source":"web","created_at":"Mon Aug 29 04:23:44 +0000 2011","in_reply_to_user_id":null,"user":{"listed_count":0,"favourites_count":1,"profile_sidebar_fill_color":"FFF7CC","location":"cabuyao,Laguna PHILIPINES","profile_background_tile":false,"lang":"en","profile_link_color":"FF0000","description":"Prudence keeps life safe, but it does not often make it happy.","default_profile_image":false,"default_profile":false,"verified":false,"profile_sidebar_border_color":"F2E195","notifications":null,"time_zone":"Alaska","created_at":"Sun Nov 14 …

在我的people_controller_spec.rb中我有

before(:each) do
    @office = FactoryGirl.create(:office)
    @organization = FactoryGirl.create(:organization)
    @user = FactoryGirl.create(:user, organization: @organization)

    @request.session['user_id'] = @user.id
    @request.session['current_organization_id'] = @user.organization.id
  end

我有这个application_controller.rb

class ApplicationController < ActionController::Base

  protect_from_forgery

  private

  def current_user
    @current_user ||= User.find(session[:user_id]) if session[:user_id]
  end

  def current_organization
    if session[:current_organization_id]
      Organization.find(session[:current_organization_id])
    else
      @current_organization ||= Organization.find(current_user.organization_id)
    end
  end

  helper_method :current_user
  helper_method :current_organization
end

会话哈希似乎没有在application_controller.rb中持久存在,这就是为什么我得到这些类型的测试错误,其中application_controller.rb中的@current_user是nil

  6) PeopleController index sorts all people alphabetically by first_name
     Failure/Error: get :index, {search: {meta_sort: "first_name.asc"}}, valid_session
     NoMethodError:
       undefined method `organization_id' for nil:NilClass
     # ./app/controllers/application_controller.rb:15:in `current_organization'
     # ./app/controllers/people_controller.rb:107:in …

可能重复:
如何从gcc中的C/C++源获得汇编程序输出？

你好,那里!

我有一个C和C++源代码,我想在汇编代码中看到.如何为这些生成等效的asm代码？我应该使用什么工具？或者是否已经可以使用gcc编译器等工具？然后我应该执行什么命令？我更喜欢Linux之上的工具,尤其是Ubuntu.

提前致谢!

$(function() {
  $(".form_new td select").change(function() {
    alert($('#new_school').id)
  });
});

我在我的应用程序中有上面的代码.但它一直警告"未定义".我究竟做错了什么？#new_school是一个文本字段.我已经安装了jquery.在我的public/javascripts文件夹中,我有jquery.js,jquery.min.js和jquery.ujs.js.我正在使用Rails 3.0.9

我正处于创建Rails应用程序的早期阶段.我想要做的是将光标悬停在链接上时删除链接上的黑色背景(如图所示).怎么样？我没有在css文件上添加任何内容.我正在使用Rails 3.2