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Why malloc+memset is slower than calloc?
It's known that calloc is different than malloc in that it initializes the memory allocated. With calloc , the memory is set to zero. With malloc , the memory is not cleared.
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How to add 2 buttons into the UINavigationbar on the right side without IB?
...ith iOS 5+ it's as easy as:
UIBarButtonItem *btnShare = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(share)];
UIBarButtonItem *btnRefresh = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self ...
What is the meaning of the term arena in relation to memory?
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An arena is just a large, contiguous piece of memory that you allocate once and then use to manage memory manually by handing out parts of that memory. For example:
char * arena = malloc(HUGE_NUMBER);
unsigned int current = 0;
void * my_malloc(size_t n) { current += n; return arena +...
Stack, Static, and Heap in C++
...t understood very well these three concepts. When do I have to use dynamic allocation (in the heap) and what's its real advantage? What are the problems of static and stack? Could I write an entire application without allocating variables in the heap?
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SET NOCOUNT ON usage
...o false. Always read what your client lib suggests since it will interpret token (message) stream instead of you
– Milan Jaric
Jul 31 '19 at 10:34
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Difference between malloc and calloc?
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calloc() gives you a zero-initialized buffer, while malloc() leaves the memory uninitialized.
For large allocations, most calloc implementations under mainstream OSes will get known-zeroed pages from the OS (e.g. via POSIX mm...
How to create fixed space and flexible space bar button items programmatically?
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UIBarButtonItem *fixedItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
fixedItem.width = 20.0f; // or whatever you want
UIBarButtonItem *flexibleItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem...
What is a Memory Heap?
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Presumably you mean heap from a memory allocation point of view, not from a data structure point of view (the term has multiple meanings).
A very simple explanation is that the heap is the portion of memory where dynamically allocated memory resides (i.e. memory ...
OAuth secrets in mobile apps
...ou can watch for patterns of abuse and revoke access on the user or access token level before the API you're consuming decides to shut down your entire service.
– quasistoic
Jul 8 '12 at 5:20
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Get path of executable
...t;boost/predef.h>
#include <boost/version.hpp>
#include <boost/tokenizer.hpp>
#if (BOOST_VERSION > BOOST_VERSION_NUMBER(1,64,0))
# include <boost/process.hpp>
#endif
#if (BOOST_OS_CYGWIN || BOOST_OS_WINDOWS)
# include <Windows.h>
#endif
#include <boost/executabl...