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Get to UIViewController from UIView?
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All this bs about "you shouldn't do this" is just that. If a view wants to know about its view controller, that is up to the programmer to decide. period.
– Daniel Kanaan
Dec 7 '15 at ...
Booleans, conditional operators and autoboxing
...conditional expression is the result of applying capture conversion (§5.1.10) to lub(T1, T2) (§15.12.2.7).
S1 == <special null type> (see §4.1)
S2 == boolean
T1 == box(S1) == <special null type> (see last item in list of boxing conversions in §5.1.7)
T2 == box(S2) == `Boolean
lub...
How to set JVM parameters for Junit Unit Tests?
...t app that will only run with sufficient heap-space, and will be run internally on Win 7 64-bit machines - so redesigning the tests isn't a practical suggestion.)
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ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
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当 保存按钮.被点击
设置 保存路径 = "/sdcard/processed_image.jpg"
调用 ImageUtil1.Save 图片组件 保存路径
显示通知 "图像已保存到: " & 保存路径
高级应用
批量图像处理
当 批量处理按钮.被...
When should I use Struct vs. OpenStruct?
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@IvanKolmychek: Cool, actually I prefer the block approach.
– tokland
Mar 9 '16 at 18:21
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Adding a user to a group in django
... I would expect to see in a section of the docs under auth for programmatically creating groups. instead all there is is a weak paragraph: docs.djangoproject.com/en/1.3/topics/auth/#groups I guess it helps to keep in mind that the auth models are just regular models, and the standard model reference...
How to uninstall a Windows Service when there is no executable for it left on the system?
How do I uninstall a Windows Service when there is no executable for it left on the system? I can not run installutil -u since there is not executable left on the system. I can still see an entry for the service in the Services console.
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Is < faster than
... will not be faster on most architectures. You didn't specify, but on x86, all of the integral comparisons will be typically implemented in two machine instructions:
A test or cmp instruction, which sets EFLAGS
And a Jcc (jump) instruction, depending on the comparison type (and code layout):
jne ...
How to read a .xlsx file using the pandas Library in iPython?
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I usually create a dictionary containing a DataFrame for every sheet:
xl_file = pd.ExcelFile(file_name)
dfs = {sheet_name: xl_file.parse(sheet_name)
for sheet_name in xl_file.sheet_names}
Update: In pandas version...
Rails Observer Alternatives for 4.0
With Observers officially removed from Rails 4.0 , I'm curious what other developers are using in their place. (Other than using the extracted gem.) While Observers were certainly abused and could easily become unwieldily at times, there were many use-cases outside of just cache-clearing where they...