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Dependency injection through constructors or property setters?
I'm refactoring a class and adding a new dependency to it. The class is currently taking its existing dependencies in the constructor. So for consistency, I add the parameter to the constructor.
Of course, there are a few subclasses plus even more for unit tests, so now I am playing the game of go...
How to count the number of set bits in a 32-bit integer?
...d what your usage pattern is.
Some CPUs have a single built-in instruction to do it and others have parallel instructions which act on bit vectors. The parallel instructions (like x86's popcnt, on CPUs where it's supported) will almost certainly be fastest. Some other architectures may have a slow ...
Why does C++11's lambda require “mutable” keyword for capture-by-value, by default?
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This is a good point. I totally agree. In C++0x though, I don't quite see how the default helps enforce the above. Consider I am on the receiving end of the lambda, e.g. I am void f(const std::function<int(int)> g). How am I guaranteed that g ...
What is the difference between Class.getResource() and ClassLoader.getResource()?
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To answer the question whether there is any caching going on.
I investigated this point further by running a stand-alone Java application that continuously loaded a file from disk using the getResourceAsStream ClassLoader me...
Fluid or fixed grid system, in responsive design, based on Twitter Bootstrap
...about the various options in the twitter bootstrap grid , and how they go together.
5 Answers
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How to convert CFStringRef to NSString?
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NSString and CFStringRef are "Toll free bridged", meaning that you can simply typecast between them.
For example:
CFStringRef aCFString = (CFStringRef)aNSString;
works perfectly and transparently. Likewise:
NSString *aNSString = (NSString *)aCFString...
Writing a list to a file with Python
Is this the cleanest way to write a list to a file, since writelines() doesn't insert newline characters?
21 Answers
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Height equal to dynamic width (CSS fluid layout) [duplicate]
Is it possible to set same height as width (ratio 1:1)?
9 Answers
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How to atomically delete keys matching a pattern using Redis
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Starting with redis 2.6.0, you can run lua scripts, which execute atomically. I have never written one, but I think it would look something like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis docume...
You need to use a Theme.AppCompat theme (or descendant) with this activity
... reason you are having this problem is because the activity you are trying to apply the dialog theme to is extending ActionBarActivity which requires the AppCompat theme to be applied.
Update: Extending AppCompatActivity would also have this problem
In this case, change the Java inheritance fr...