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ActiveRecord, has_many :through, and Polymorphic Associations
...h Rails 3.1.1 that breaks this functionality. If you are having this problem first try upgrading, it's been fixed in 3.1.2
You're so close. The problem is you're misusing the :source option. :source should points to the polymorphic belongs_to relationship. Then all you need to do is specify :source...
What's the difference between Jetty and Netty?
What is the main difference between Jetty and Netty?
3 Answers
3
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How can I detect whether an iframe is loaded?
I am trying to check whether an iframe has loaded after the user clicks a button.
3 Answers
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What does a double * (splat) operator do
...
Ruby 2.0 introduced keyword arguments, and ** acts like *, but for keyword arguments. It returns a Hash with key / value pairs.
For this code:
def foo(a, *b, **c)
[a, b, c]
end
Here's a demo:
> foo 10
=> [10, [], {}]
> foo 10, 20, 30
=> [...
Android应用内存泄露分析、改善经验总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Android应用内存泄露分析、改善经验总结前言  通过这几天对好几个应用的内存泄露检测和改善，效果明显：完全退出应用时，手动触发GC，从原来占有内存100多M降到低于20M...前言
  通过这几天对好几个应用的内存...
Github (SSH) via public WIFI, port 22 blocked
I'm currently on a public WIFI spot and I'm unable to use SSH (they probably blocked that port). However, I need that connection to do a git push .
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How to set the holo dark theme in a Android app?
How can I set the dark holo theme in my app?
At this time I got this:
4 Answers
4
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Storing Image Data for offline web application (client-side storage database)
... an offline web application using appcaching. I need to provide it about 10MB - 20MB of data that it will save (client-side) consisting mainly of PNG image files. The operation is as follows:
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How do I get the name of a Ruby class?
How can I get the class name from an ActiveRecord object?
5 Answers
5
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jQuery check if an input is type checkbox?
...se the pseudo-selector :checkbox with a call to jQuery's is function:
$('#myinput').is(':checkbox')
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