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Deep null checking, is there a better way?
...w planned for the next Roslyn compiler release. Note that there is still some debate over the exact syntactic and semantic analysis of the operator.
Update (July 2015): Visual Studio 2015 has been released and ships with a C# compiler that supports the null-conditional operators ?. and ?[].
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In Markdown, what is the best way to link to a fragment of a page, i.e. #some_id?
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See this answer.
In summary make a destination with
<a name="sometext"></a>
inserted anywhere in your markdown markup (for example in a header:
## heading<a name="headin"></a>
and link to it using the markdown linkage:
[This is the link text](#headin)
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Replace selector images programmatically
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As far as I've been able to find (I've tried doing something similar myself), there's no way to modify a single state after the StateListDrawable has already been defined. You can, however, define a NEW one through code:
StateListDrawable states = new StateListDrawable();
stat...
How to use sed to replace only the first occurrence in a file?
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Could somebody please explain the 'or if you prefeer' solution? I don't know where to put the "from" pattern.
– Jean-Luc Nacif Coelho
Feb 2 '15 at 18:44
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Why does C++11 not support designated initializer lists as C99? [closed]
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C++ has constructors. If it makes sense to initialize just one member then that can be expressed in the program by implementing an appropriate constructor. This is the sort of abstraction C++ promotes.
On the other hand the designated initializers feature is more about exposing and maki...
C++ equivalent of Java's toString?
...lass. Is that possible in C++? In Java you could override the toString() method for similar purpose.
5 Answers
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Building and running app via Gradle and Android Studio is slower than via Eclipse
...i-project (~10 modules) of which building takes about 20-30 seconds each time. When I press Run in Android Studio, I have to wait every time to rebuild the app, which is extremely slow.
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How to Update Multiple Array Elements in mongodb
I have a Mongo document which holds an array of elements.
15 Answers
15
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How to use jQuery in chrome extension?
I am writing a chrome extension. And I want to use jQuery in my extension. I am not using any background page , just a background script .
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How do I write a custom init for a UIView subclass in Swift?
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The init(frame:) version is the default initializer. You must call it only after initializing your instance variables. If this view is being reconstituted from a Nib then your custom initializer will not be called, and instead the init?(...