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Is there any advantage of using map over unordered_map in case of trivial keys?
... vs list) , the default process heap (talking Windows here) is serialized. Allocating (small) blocks in large quantities in a multithreaded application is very expensive.
– ROAR
Feb 4 '10 at 3:06
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C# vs C - Big performance difference
...cation (both in release build). Since the C# application is very basic and allocates the memory used in the loop on the stack and not on the heap, it is actually performing a lot better than a real application involved in objects, heavy computations and with larger data-sets. So the figures provided...
C pointers : pointing to an array of fixed size
...sing technique is the dominance of naive approach to typing of dynamically allocated arrays. For example, if the program calls for fixed arrays of type char[10] (as in your example), an average developer will malloc such arrays as
char *p = malloc(10 * sizeof *p);
This array cannot be passed to a...
Version vs build in Xcode
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OT: You have a leak in your method - you alloc/init the string, which retains the string, but you're not releasing it. On an object you return from a method, you should generally use a convenience method so the string is autoreleased automatically, or call autorelea...
Is there a performance difference between i++ and ++i in C++?
... What the compiler can avoid is the second copy to return tmp, by allocating tmp in the caller, through NRVO, as mentioned by another comment.
– Blaisorblade
Jan 15 '09 at 0:13
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Why does this method print 4?
... to Java Virtual Machine Specifications for JAVA 6,
frames may be heap allocated.
So, when a frame is created, there should be enough heap space to create a stack frame and enough stack space to store the new reference which point to the new stack frame if the frame is heap allocated.
Now let...
Difference between objectForKey and valueForKey?
...ntNumber = [NSNumber numberWithInt:12345];
Account *newAccount = [[Account alloc] init];
[newAccount setAccountNumber:anAccountNUmber];
NSNumber *anotherAccountNumber = [newAccount accountNumber];
Using KVC, I can access the property dynamically:
NSNumber *anAccountNumber = [NSNumber numberWith...
Does setting Java objects to null do anything anymore?
...ementing an expandable array container (ArrayList or the like) using a pre-allocated array. Elements beyond the "logical" size of the list should be nulled out, or else they won't be freed.
See Effective Java 2nd ed, Item 6: Eliminate Obsolete Object References.
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How dangerous is it to access an array out of bounds?
... that exists in REAL space outside the region(s) that have been assigned / allocated to your process.
Direct answers:
1) Reading will almost never directly damage another process, however it can indirectly damage a process if you happen to read a KEY value used to encrypt, decrypt, or validate a p...
What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
...ters. Traditionally, it has always been of utmost importance to check your allocs, copies and retains to make sure each has a corresponding release message.
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