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How does `is_base_of` work?
...* than D* to B*.
Now what user defined conversion sequence is better? The one for the second or the first check function? The rule is that user defined conversion sequences can only be compared if they use the same conversion function or constructor according to 13.3.3.2/3b2. This is exactly the ca...
Does Git warn me if a shorthand commit ID can refer to 2 different commits?
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Given the structure of the git source code, it looks like one of the two outputs is a warning, and the other one an error. Not certain, though.
– Izkata
May 6 '14 at 21:07
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How does BLAS get such extreme performance?
...ning the library by hand for your particular machine then using a prebuilt one.)
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Are there any downsides to passing structs by value in C, rather than passing a pointer?
... passing by value is perfectly acceptable. But, apart from speed, there is one other reason why you should be careful passing/returning large structs by value: Stack space.
A lot of C programming is for embedded systems, where memory is at a premium, and stack sizes may be measured in KB or even By...
Java - escape string to prevent SQL injection
...ny way.
There are different set methods for different data types -- which one you use depends on what your database fields are. For example, if you have an INTEGER column in the database, you should use a setInt method. The PreparedStatement documentation lists all the different methods available...
Android: how to handle button click
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Question 1:
Unfortunately the one in which you you say is most intuitive is the least used in Android. As I understand, you should separate your UI (XML) and computational functionality (Java Class Files). It also makes for easier debugging. It is actuall...
Is there a way to add/remove several classes in one single instruction with classList?
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I am switching to this one as the correct answer, as this is a native API, even if support is not great.
– Enrique Moreno Tent
Sep 4 '14 at 8:29
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How to check if PHP array is associative or sequential?
... all arrays as associative, so there aren't any built in functions. Can anyone recommend a fairly efficient way to check if an array contains only numeric keys?
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Can you make valid Makefiles without tab characters?
... supports a custom recipe prefix. See this answer.
You are not the first one to dislike this aspect of make. To quote Unix Haters' Handbook:
The problem with Dennis’s Makefile is that when he added the comment line, he inadvertently inserted a space before the tab character at the beginning ...
Java volatile reference vs. AtomicReference
...erence itself is implemented using Unsafe.
So, when is it good to choose one over the other:
Only need get/set? Stick with a volatile field, simplest solution and lowest overhead.
Need the extra functionality? If this is a performance(speed/memory overhead) sensitive part of your code make a cho...