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How can I return an empty IEnumerable?
...ore expensive operation because it would create an instance of a list (and allocate memory for it in the process)
– Igor Pashchuk
Jun 30 '11 at 20:14
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hash function for string
...e is roughly 2x the expected number of elements to be stored in the table. Allocating much more than that will make your hash table faster but at rapidly diminishing returns, making your hash table smaller than that will make it exponentially slower. This is because there is a non-linear trade-off b...
initializing a boolean array in java
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The array will be initialized to false when you allocate it.
All arrays in Java are initialized to the default value for the type. This means that arrays of ints are initialised to 0, arrays of booleans are initialised to false and arrays of reference types are initialise...
Can you run GUI applications in a Docker container?
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First, you need to check the port allocated (by doing docker inspect <container id> or simply docker ps, then you connect to your host's ip with the port you just found.
– creack
Jul 30 '13 at 0:54
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How to get current memory usage in android?
...Runtime.freeMemory() returns 0 and Runtime.totalMemory() returns currently allocated memory only.
– artem
May 4 at 21:03
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How to convert SecureString to System.String?
...valuePtr = IntPtr.Zero;
try {
valuePtr = Marshal.SecureStringToGlobalAllocUnicode(value);
return Marshal.PtrToStringUni(valuePtr);
} finally {
Marshal.ZeroFreeGlobalAllocUnicode(valuePtr);
}
}
If you want to avoid creating a managed string object, you can access the raw data usin...
Proper use of 'yield return'
... }
}
}
If you use List instead of yield, you will need to allocation 1 million objects to memory (~190mb) and this simple example will take ~1400ms to run. However, if you use yield, you don't need to put all these temp objects to memory and you will get significantly faster algori...
How do you copy the contents of an array to a std::vector in C++ without looping?
...ce() first on the two iterators to get the needed number of elements, then allocate just once.
– Drew Hall
Nov 4 '08 at 2:38
4
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iOS difference between isKindOfClass and isMemberOfClass
...se
@interface A : NSObject
@end
@interface B : A
@end
...
id b = [[B alloc] init];
then
[b isKindOfClass:[A class]] == YES;
[b isMemberOfClass:[A class]] == NO;
Basically, -isMemberOfClass: is true if the instance is exactly of the specified class, while -isKindOfClass: is true if the ins...
How to find a min/max with Ruby
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Punctuation isn't the problem here. An entire heap allocation to get the max of a few values is the underlying ugliness here.
– kdbanman
Mar 7 '15 at 21:37
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