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What is the “Execute Around” idiom?
...e you write a method to do things which are always required, e.g. resource allocation and clean-up, and make the caller pass in "what we want to do with the resource". For example:
public interface InputStreamAction
{
void useStream(InputStream stream) throws IOException;
}
// Somewhere else ...
Segmentation fault on large array sizes
...The array is too big to fit in your program's stack address space.
If you allocate the array on the heap you should be fine, assuming your machine has enough memory.
int* array = new int[1000000];
But remember that this will require you to delete[] the array. A better solution would be to use st...
How is malloc() implemented internally? [duplicate]
Can anyone explain how malloc() works internally?
3 Answers
3
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Is there any overhead to declaring a variable within a loop? (C++)
...
Stack space for local variables is usually allocated in function scope. So no stack pointer adjustment happens inside the loop, just assigning 4 to var. Therefore these two snippets have the same overhead.
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Could not reserve enough space for object heap
...machines with a lot of RAM, but with lower memory ulimits. Java decides to allocate a big heap because it detects the ram in the machine, but it's not allowed to allocate it because of ulimits.
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How to create a memory leak in Java?
...The thread loads a class via an (optionally custom) ClassLoader.
The class allocates a large chunk of memory (e.g. new byte[1000000]), stores a strong reference to it in a static field, and then stores a reference to itself in a ThreadLocal. Allocating the extra memory is optional (leaking the clas...
How do malloc() and free() work?
I want to know how malloc and free work.
13 Answers
13
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Xcode without Storyboard and ARC
...gWithOptions: (NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
TestViewController *test = [[TestViewController alloc] initWithNibName:@"TestViewController" bundle...
UITableViewHeaderFooterView: Unable to change background color
...gn custom view: myTableViewHeaderFooterView.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"myImage.png"]];
– skywinder
Jan 16 '14 at 6:28
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Shards and replicas in Elasticsearch
...search performance and for fail-over. A replica shard is never going to be allocated on the same node where the related primary is (it would pretty much be like putting a backup on the same disk as the original data).
Back to our example, with 1 replica we'll have the whole index on each node, sinc...