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Initialize a byte array to a certain value, other than the default null? [duplicate]
...then discarding several (perhaps many) intermediate arrays instead of just allocating a single array and then filling it.
– LukeH
May 27 '11 at 9:25
3
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Which parts of Real World Haskell are now obsolete or considered bad practice?
...re_ptr -- release with free()
return (Right (Regex reg str))
As malloc() should be used with free(), new with delete, allocate with deallocate, one should always use the correct function.
TL;DR You should always free memory with the same allocator that allocated it for you.
If a fore...
Return a `struct` from a function in C
... function, to which I replied: "No! You'd return pointers to dynamically malloc ed struct s instead."
9 Answers
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Difference between a “coroutine” and a “thread”?
...d for a certain amount time (on a single processor machine). The scheduler allocates time (timeslicing) to each thread, and if the thread isn't finished within that time, the scheduler pre-empts it (interrupts it and switches to another thread). Multiple threads can run in parallel on a multi-proce...
Most efficient way to concatenate strings?
...e expected semantics of a 'string join' operation).
Next, given the total allocation size of the final string, the biggest boost in performance is gained by building the result string in-place. Doing this requires the (perhaps controversial) technique of temporarily suspending the immutability of a...
How do I convert Long to byte[] and back in java
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public byte[] longToBytes(long x) {
ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
buffer.putLong(x);
return buffer.array();
}
public long bytesToLong(byte[] bytes) {
ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
buffer.put(bytes);
buffer.flip();//need flip ...
Removing trailing newline character from fgets() input
... helpful answer. Can we use strlen(buffer) when buffer size is dynamically allocated using malloc ?
– rrz0
Nov 10 '18 at 10:16
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C pointer to array/array of pointers disambiguation
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So, for 32 bit systems: int* arr[8]; /* 8x4 bytes allocated, for each pointer / int (*arr)[8]; / 4 bytes allocated, only a pointer */
– George
May 13 '09 at 18:43
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What Every Programmer Should Know About Memory?
...gepages work well on Linux without having to manually use hugetlbfs. Make allocations >= 2MiB with 2MiB alignment (e.g. posix_memalign, or an aligned_alloc that doesn't enforce the stupid ISO C++17 requirement to fail when size % alignment != 0).
A 2MiB-aligned anonymous allocation will use hug...
Should I compile with /MD or /MT?
... of the CRT - which means they will all share a single CRT heap and memory allocated in one .exe/.dll can be freed in another.
If you use the static CRT for your .exe and all .dlls then they'll all get a seperate copy of the CRT - which means they'll all use their own CRT heap so memory must be fre...