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What is Node.js? [closed]
...like everyone else? In Node.js, a new connection is just a very small heap allocation. Spinning up a new process takes significantly more memory, a megabyte on some platforms. But the real cost is the overhead associated with context-switching. When you have 10^6 kernel threads, the kernel has to do...
Is it safe to delete a void pointer?
...sually work because information is stored along with the pointer about the allocation itself, so the deallocator can return it to the right place. In this sense it is "safe" as long as your allocator uses internal boundary tags. (Many do.)
However, as mentioned in other answers, deleting a void ...
Difference between string and char[] types in C++
...
A char array is just that - an array of characters:
If allocated on the stack (like in your example), it will always occupy eg. 256 bytes no matter how long the text it contains is
If allocated on the heap (using malloc() or new char[]) you're responsible for releasing the memory...
Try-catch speeding up my code?
...e "ephemeral" -- that is, just pushed and popped on the stack, rather than allocated a specific location on the stack for the duration of the activation. We believe that the JITter will be able to do a better job of register allocation and whatnot if we give it better hints about when locals can be ...
Getting a slice of keys from a map
...eys, k)
}
}
To be efficient in Go, it's important to minimize memory allocations.
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Batch file to delete files older than N days
...[1]: Year-Month-Day
:epoch
setlocal ENABLEDELAYEDEXPANSION
for /f "tokens=1,2,3 delims=-" %%d in ('echo %1') do set Years=%%d& set Months=%%e& set Days=%%f
if "!Months:~0,1!"=="0" set Months=!Months:~1,1!
if "!Days:~0,1!"=="0" set Days=!Days:~1,1!
set /a Days=Days*day
...
How do I integrate Ajax with Django applications?
...awareness. Finally, remember that post requests in Django require the csrf_token. With AJAX calls, a lot of times you'd like to send data without refreshing the page. You'll probably face some trouble before you'd finally remember that - wait, you forgot to send the csrf_token. This is a known begin...
Adding the little arrow to the right side of a cell in an iPhone TableView Cell
...exPath
Write below code:
if (cell ==nil) {
cell=[[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];
//For creating custom accessory view with own image
UIImageView *accessoryView = [[UIImageView alloc] initWithFrame:CGRec...
In C, do braces act as a stack frame?
...[0] here? */
return;
}
(In other words: is the compiler allowed to deallocate d, even if in practice most don't?).
The answer is that the compiler is allowed to deallocate d, and accessing p[0] where the comment indicates is undefined behaviour (the program is not allowed to access the inner ...
Apache Spark: The number of cores vs. the number of executors
...ably be set to 63 *
1024 = 64512 (megabytes) and 15 respectively. We avoid allocating 100%
of the resources to YARN containers because the node needs some
resources to run the OS and Hadoop daemons. In this case, we leave a
gigabyte and a core for these system processes. Cloudera Manager helps
by ac...