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Filtering for empty or NULL names in a queryset
...ude(alias__isnull=True)
If you need to exclude null values and empty strings, the preferred way to do so is to chain together the conditions like so:
Name.objects.exclude(alias__isnull=True).exclude(alias__exact='')
Chaining these methods together basically checks each condition independently: ...
Injecting a mock into an AngularJS service
I have an AngularJS service written and I would like to unit test it.
7 Answers
7
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How do I detect “shift+enter” and generate a new line in Textarea?
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Better use simpler solution:
Tim's solution below is better I suggest using that:
https://stackoverflow.com/a/6015906/4031815
My solution
I think you can do something like this..
EDIT : Changed the code to work irrespective of the caret postion
First part of the code is to get the caret p...
MVC演化史 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Model往往需要多种View表现形式，如文本、图像。
提高可测试性：相对Model而言，View是不容易测试的。
从View中分离Controller就不那么重要了。Desktop软件的时代，View和Controller往往是一一对应的关系，所以常常把他们合并成为UI...
Can I write a CSS selector selecting elements NOT having a certain class or attribute?
... elements that don't have a certain class. For example, given the following HTML:
10 Answers
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iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...能化，右键断点进入编辑对话框：
我以一个循环作为测试代码：
循环中的代码每次都要单步执行，可能这并不是我想要的。我想要在i为3的时候中断程序，进行调试，编写条件如下：
设置i==3的条件后，程序就会在该条件...
Find all packages installed with easy_install/pip?
...yPI packages that were installed with easy_install or pip? I mean, excluding everything that was/is installed with the distributions tools (in this case apt-get on Debian).
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GestureDetect 手势检测扩展：识别滑动、点击和长按手势 · App Inventor 2 中文网
...使用滑动手势
事件处理：保持事件处理函数的简洁性
测试兼容性：在不同设备上测试手势识别的准确性
常见问题
Q: 手势检测不灵敏怎么办？
A: 检查布局组件是否正确设置，确保组件区...
Triggering HTML5 Form Validation
..., I'd love to make use of it. However, I need to do it on my terms. I'm using JQuery.
11 Answers
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浅谈APM在电子交易系统中的应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...均数据。
但这玩意真的准吗？？？？？？？？ 各个测试都是彼此间独立的，前端压测WEB或者客户端的时候推送了那些服务到中间件，这个时候中间件的硬件资源，软件资源利用率是多少？数据库的硬件资源，软件资源利用...