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What is the difference between “instantiated” and “initialized”?
...ble is initialized with a value. An object is instantiated when memory is allocated for it and it's constructor has been run.
For instance here is a variable:
Dim obj as Object
This variable has not been initialized. Once I assign a value to the obj variable, the variable will be initialized. ...
std::string to char*
..., then because I want to call C code which changes the string and C code deallocates stuff with free() and allocates with malloc() (strdup uses malloc). So if I pass my raw string to some function X written in C it might have a constraint on it's argument that it has to allocated on the heap (for ex...
How to get IntPtr from byte[] in C#
...th unmanaged code by using Mashal.Copy:
IntPtr unmanagedPointer = Marshal.AllocHGlobal(bytes.Length);
Marshal.Copy(bytes, 0, unmanagedPointer, bytes.Length);
// Call unmanaged code
Marshal.FreeHGlobal(unmanagedPointer);
Alternatively you could declare a struct with one property and then use Marsh...
How to get a random number in Ruby
... #=> 0.350621695741409
p SecureRandom.hex #=> "eb693ec8252cd630102fd0d0fb7c3485"
It's documented here: Ruby 1.9.3 - Module: SecureRandom (lib/securerandom.rb)
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Technically, why are processes in Erlang more efficient than OS threads?
... registers, address space mapping, etc.).
Erlang processes use dynamically allocated stacks, which start very small and grow as necessary. This permits the spawning of many thousands — even millions — of Erlang processes without sucking up all available RAM.
Erlang used to be single-threaded, me...
What is a deadlock?
...o process P1 and p2 and there are two resources R1 and R2.
Resource R1 is allocated to process P1 and resource R2 is allocated to process p2.
To complete execution of process P1 needs resource R2, so P1 request for R2, but R2 is already allocated to P2.
In the same way Process P2 to complete its ...
Performance of Arrays vs. Lists
...t to and probably less than the capacity of the _items array. The array is allocated with excess capacity to make adding future items quicker by not requiring re-allocation for every addition.
– Trasvi
Dec 17 '15 at 0:42
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Programmatically open new pages on Tabs
...l.msdn.microsoft.com/forums/en-US/ieextensiondevelopment/thread/951b04e4-db0d-4789-ac51-82599dc60405/
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Java: int array initializes with nonzero elements
... we are faced with a bug in the JIT-compiler. Compiler determines that the allocated array is filled after allocation in Arrays.fill(...), but the check for uses between the allocation and the fill is faulty. So, compiler performs an illegal optimization - it skips zeroing of allocated array.
This ...
Is it safe to push_back an element from the same vector?
If the second push_back causes a reallocation, the reference to the first integer in the vector will no longer be valid. So this isn't safe?
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