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Garbage collector in Android
...ny subtle implementation details. The "good practice" is to let the GC run by itself; a manual call to the GC is the exception, which should be envisioned only after an actual performance issue has been duly witnessed.
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Effects of the extern keyword on C functions
...when it's linked, and foo.c needs a function from bar.c when it's linked.
By using 'extern', you are telling the compiler that whatever follows it will be found (non-static) at link time; don't reserve anything for it in the current pass since it will be encountered later. Functions and variables a...
What does “#define _GNU_SOURCE” imply?
...URCE is recommended to be "the very first thing in the file, preceded only by comments").
– Alexander Pozdneev
Dec 6 '16 at 11:17
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Why does GCC generate such radically different assembly for nearly the same C code?
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Updated to sync with the OP's edit
By tinkering with the code, I've managed to see how GCC optimizes the first case.
Before we can understand why they are so different, first we must understand how GCC optimizes fast_trunc_one().
Believe it or not, fast_trunc_...
Given a view, how do I get its viewController?
...should be an automatic feature, not one where you have to work to achieve (by adding a property to keep track). One could say the same thing about views: why do you need to know who child you are? Or whether there are other sibling views. Yet there are ways to get those objects.
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How to split csv whose columns may contain ,
...text within double quotes as literal. I imagine that Excel implements this by going one character at a time, if it encounters a "text qualifier", it keeps going to the next "qualifier". You can probably implement this yourself with a for loop and a boolean to denote if you're inside literal text.
p...
Get OS-level system information
...f free memory available to the JVM */
System.out.println("Free memory (bytes): " +
Runtime.getRuntime().freeMemory());
/* This will return Long.MAX_VALUE if there is no preset limit */
long maxMemory = Runtime.getRuntime().maxMemory();
/* Maximum amount of memory the JVM wi...
About catching ANY exception
...pting to do so raises a TypeError exception, which is what would be caught by the enclosing except Exception clause in such a case. On the other hand, an old-style class can be raised and qualifies as a "non-exception" that doesn't subclass Exception - this will be caught by a bare except clause but...
Will HTML5 allow web apps to make peer-to-peer HTTP connections?
...st upgrade trends, WebRTC should be available on around 75% of iOS devices by 2018, and 100% by 2020.
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How do you clear a slice in Go?
...ents are of type T:
var slice []T
then enforcing len(slice) to be zero, by the above "trick", doesn't make any element of
slice[:cap(slice)]
eligible for garbage collection. This might be the optimal approach in some scenarios. But it might also be a cause of "memory leaks" - memory not used,...