toctan

background-image 图片加载成功但在 Chrome 里不显示，怀疑和 turbolinks 有关？

toctan — Wed, 04 Dec 2013 18:14:14 +0800

如图，在 Chrome (Version 31.0.1650.57) 里，加载完成后刷新，在地址栏直接访问这个网址，或者禁用 JS 图片都能正常显示。另外，在 Safari 和另外一台 Ubuntu 上的 Chrome 28 图片能够正常显示。这是为什么啊？

Kernel#` 调用 xclip irb 挂起

toctan — Tue, 08 Oct 2013 01:04:12 +0800

用 Linux 的同学们帮忙打开 irb 或者 pry 试下下面两行代码：

2.0.0p247 > system "xclip .bashrc"
 => true 
2.0.0p247 > `xclip .bashrc`
# irb hangs!

完全想不通 irb 为什么会挂起啊，查了下文档， Kernel#` 和 Kernel#system 都是在 subshell 里跑命令，只是前者返回标准输出结果，后者返回 true, false 或 nil

Minitest assert 和 must 返回的结果不一样，bug？

toctan — Thu, 12 Sep 2013 19:02:04 +0800

require 'delegate'

class Bar < SimpleDelegator
  def initialize(obj)
    super(obj)
  end
end

class Foo
end

require 'minitest/autorun'

describe Bar do
  subject { Bar.new(Foo.new) }

  it "assert kind of Bar" do
    assert_kind_of(Bar, subject)
  end

  it "must be kind of Bar" do
    subject.must_be_kind_of Bar
  end

  it "assert instance of Bar" do
    assert_instance_of(Bar, subject)
  end

  it "must be instance of Bar" do
    subject.must_be_instance_of Bar
  end
end

➜  ~  /usr/bin/ruby mini.rb
Run options: --seed 24089

# Running:

F.F.

Finished in 0.004433s, 902.2708 runs/s, 902.2708 assertions/s.

  1) Failure:
Bar#test_0004_must be instance of Bar [mini.rb:30]:
Expected #<Foo:0x00000002f49320> to be an instance of Bar, not Foo.


  2) Failure:
Bar#test_0002_must be kind of Bar [mini.rb:22]:
Expected #<Foo:0x00000002f3ee20> to be a kind of Bar, not Foo.

4 runs, 4 assertions, 2 failures, 0 errors, 0 skips

如何 parse 特定格式的文件，比如 Kindle 的 My Clippings.txt?

toctan — Sun, 01 Sep 2013 22:12:25 +0800

Strange Stones: Dispatches from East and West (P.S.) (Hessler, Peter)
- Your Highlight Location 73-73 | Added on Friday, August 16, 2013 2:55:42 AM

life is more interesting if you can step outside of your own world every once in a while.
==========
Strange Stones: Dispatches from East and West (P.S.) (Hessler, Peter)
- Your Highlight Location 115-116 | Added on Friday, August 16, 2013 3:05:40 AM

The joy of nonfiction is searching for balance between storytelling and reporting, finding a way to be both loquacious and observant.
==========
Strange Stones: Dispatches from East and West (P.S.) (Hessler, Peter)
- Your Highlight Location 1306-1306 | Added on Saturday, August 17, 2013 1:50:31 PM

“Russian women get fat because they don’t care,”

上面是 My Clipping.txt 的一个片段，每段 highlights，以==========分割，包括书籍，作者，位置，时间，内容等信息，我想把这文件 parse 成包含以下结构 Hash 的 Array：

{
  book: 'Strange Stones: Dispatches from East and West',
  author: 'Hessler, Peter',
  location: '1306-1306',
  time: DateTime.parse('Saturday, August 17, 2013 1:50:31 PM'),
  content: 'Russian women get fat because they don’t care.'
}

请大家提供一个思路，谢谢。

把字符串写入文件保留'\n'

toctan — Sat, 25 May 2013 16:22:55 +0800

str = "<ul>\n<li>One</li>\n<li>Two</li>\n</ul>\n"

File.open('test', 'w') do |f|
  f.write(str)
end

这样 test 文件的内容为：

<ul>
<li>One</li>
<li>Two</li>
</ul>

我想保留'\n'，在文件里显示为一行，应该怎么写啊？

Code School Hall Pass 48 小时内课程全免

toctan — Sun, 21 Apr 2013 11:57:48 +0800

试了一下 Git Real, 视频做得像科幻片一样，强烈推荐。

另，可以试试下 @xdite 在这份 Rails 阅读清单里提到的课程：CSS, SASS, jQuery, CoffeeScript, Backbone, Rails for Zombies, Rails testing for zombies, Testing with Rspec, Code Ruby Bits

http://go.codeschool.com/PyDNZQ