小编its*_*lay的帖子

来自文档:http://ruby-doc.org/core-2.2.0/TrueClass.html#method-i-7C

true |  puts("or")
true || puts("logical or")

# produces:

or

• 你能解释什么时候"单管"有用吗？
  
• 有什么不同？

(仅在TrueClass上下文中(不是Array或Fixnum上下文)

当我试图获得一个跨度的表.我得到流动的桌子.如何在没有这些奇怪空间的情况下获得平台？图解释错了什么:

完整列出的sourse页面https://gist.github.com/2984012

为什么 GDB 在以下示例中不打印宏的值？

\xe2\x9d\xaf cat sample.c\n#include <stdio.h>\n\n#define M 42\n\nint main(int argc, const char **argv)\n{\n  printf("M: %d\\n", M);\n  return 0;\n}\n\n\xe2\x9d\xaf rm -f sample\n\xe2\x9d\xaf gcc -Wall -g3 -ggdb -gdwarf-2 sample.c -o sample\n\xe2\x9d\xaf gdb sample\n\ngdb> break main\ngdb> run\ngdb> info macro M\n  The symbol `M\' has no definition as a C/C++ preprocessor macro\n  at <user-defined>:-1\ngdb> continue\n  Continuing.\n  M: 42\n

谢谢！

\xe2\x9d\xaf gcc --version\nApple LLVM version 7.3.0 (clang-703.0.29)\n\xe2\x9d\xaf gdb --version\nGNU gdb (GDB) 7.10.1\n

我使用Virtual box + gem Vagrant
一周之前一切正常.
我把包装好了.现在我又用同一个项目部署了这个盒子.

和Capistrano输出错误:

*** [err :: 33.33.33.10] creating symbolic link `/vagrant/demoapp/current/log'
*** [err :: 33.33.33.10] : Read-only file system

https://gist.github.com/1746250(error + deploy.rb)

我已经设置了sudo chmod 777 -R 1vagrant/
但它仍然无法正常工作.

发生什么事？

如何在Go for map中创建一个键作为数组.例如在ruby中我可以实现它:

quarters = {
  [1, 2, 3] => 'First quarter',
  [4, 5, 6] => 'Second quarter',
  [7, 8 ,9] => 'Third quarter',
  [10, 11, 12] => 'Fourh quarter',
}
quarters[[1, 2, 3]] 
# => "First quarter"

如何在Golang中看到相同的内容？

如何在Rails中实现TwitterBootstrap.Carousel.js "活动项"标签,一切正常？

这个食谱:

<div id="myCarousel" class="carousel">
  <!-- Carousel items -->
  <div class="carousel-inner">
    <div class="active item">…</div>
    <div class="item">…</div>
    <div class="item">…</div>
  </div>
  <!-- Carousel nav -->
  <a class="carousel-control left" href="#myCarousel" data-slide="prev">&lsaquo;</a>
  <a class="carousel-control right" href="#myCarousel" data-slide="next">&rsaquo;</a>
</div>

如何将其与以下内容混合:

<% @items.each do |item| %>
    <% item.item_images.each do |item_image| %>
        <%= link_to(image_tag(item_image.image.url), item_image.image.url) %>
    <% end %>
<% end %> 

当我用gem'selenium-webdriver'(带" describe "with valid information", :js => true do")运行测试时

规格/请求/ post_pages_spec.rb

require 'spec_helper'

describe "Post pages" do
  subject { page }  
  category = Category.create(name: "Food")
  let(:post) { FactoryGirl.create(:post) }
     describe "with valid information", :js => true do
      it "should create a post" do
        fill_in "Title", with: post.title
        fill_in "Content", with: post.content
        fill_in "Publish", with: Date.today
        check "Food"  
        expect { click_button "Create Post" }.to change(Post, :count).by(1)
      end
    end
  end

我在规范中遇到错误:

Failures:

  1) Post pages post creation with valid information should …

谢谢你的回复.
我在应用程序Git应用程序中收到错误错误

Failures:

  1) Page pages page creation with invalid information should not create a page
     Failure/Error: before(:each) { visit new_admin_page_path }
     NoMethodError:
       undefined method `visit' for #<Page:0x00000005094bb0>
     # ./spec/requests/page_request_spec.rb:13:in `block (3 levels) in <top (required)>'

  2) Page pages page creation with invalid information error messages 
     Failure/Error: before(:each) { visit new_admin_page_path }
     NoMethodError:
       undefined method `visit' for #<Page:0x000000051671f0>
     # ./spec/requests/page_request_spec.rb:13:in `block (3 levels) in <top (required)>'

Finished in 1.21 seconds
14 examples, 2 failures

我错过了什么？

在ruby我可以创建的数组中填充了类型:

[1, 'hello', :world] # [Fixnum, String, Symbol]
=> [1, "hello", :here]

如何实现类似的数组在Go中填充了混合类型？

如何声明数组？

为什么其他不起作用？打印只是"8"但不是"10".哪里出错了？

<% if controller.controller_name == ('home' || 'products') %>8<% else %>10<% end %>