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How is the Linux kernel tested ?
.../debug/kmemleak.
Kmemcheck traps every read and write to memory that was allocated dynamically (i.e. with kmalloc()). If a memory address is read that has not previously been written to, a message is printed to the kernel log. Also is a part of Linux Kernel
Fault Injection Framework (included in ...
C++ valarray vs. vector
...ided to use std::vector while paying close attention to things like memory allocation and temporary object creation.
Both std::vector and std::valarray store the data in a contiguous block. However, they access that data using different patterns, and more importantly, the API for std::valarray e...
How to read file contents into a variable in a batch file?
... @IulianOnofrei, set /p calls cmd!ReadBufFromInput with a stack allocated buffer to read 1023 wide characters (2046 bytes). It reads 1023 bytes from the file, assuming 1 byte per OEM/ANSI character, but it decodes the file using the current codepage, which isn't necessarily OEM/ANSI. Wors...
Passing enum or object through an intent (the best solution)
...g, Parcelable).
UPDATE: Please note wreckgar's comment that enum.values() allocates a new array at each call.
UPDATE: Android Studio features a live template ParcelableEnum that implements this solution. (On Windows, use Ctrl+J)
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Are arrays passed by value or passed by reference in Java? [duplicate]
...itself is passed by value, confused yet?). Quick example:
// assuming you allocated the list
public void addItem(Integer[] list, int item) {
list[1] = item;
}
You will see the changes to the list from the calling code. However you can't change the reference itself, since it's passed by value:...
How to get a variable name as a string in PHP?
...ments something called "copy-on-write" so that $foo = $bar doesn't need to allocate extra memory straight away) or because they have been assigned (or passed to a function) by reference (e.g. $foo =& $bar). So a zval has no name.
When you pass a parameter to a function you are creating a new var...
Is Meyers' implementation of the Singleton pattern thread safe?
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Why dynamically allocate the singleton? Why not just make 'pInstance' a static member of 'Singleton::instance()'?
– Martin York
Nov 2 '09 at 19:41
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Design by contract using assertions or exceptions? [closed]
... of recovery can take place. For example, it may be that you're trying to allocate memory. When you catch a 'std::bad_alloc' exception it might be possible to free up memory and try again.
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How do I vertically center UITextField Text?
...nt. So he will have something like UITextField *textField = [[UITextField alloc] init];. If you use a different variable name (anything other than textField after the *), you need to do yourDifferentVariableNameHere.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter instead.
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Why is address zero used for the null pointer?
..., because it means freeing the pointer again isn't dangerous; when I call malloc it returns a pointer with the value zero if it can't get me memory; I use if (p != 0) all the time to make sure passed pointers are valid, etc.
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