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Enumerable.Empty() equivalent for IQueryable
...umerable.Empty<T>().AsQueryable();
are preferred. Array.Empty will allocate a static typed array so only one empty array of T is created and that is shared amongst all Empty queryables.
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Can we instantiate an abstract class?
...that here: -
Whenever a new class instance is created, memory space is allocated
for it with room for all the instance variables declared in the class
type and all the instance variables declared in each superclass of the
class type, including all the instance variables that may be hidden....
Why is string concatenation faster than array join?
...y overhead.
On the other hand ['abc', 'def'].join('') would usually just allocate memory to lay out the new string flat in memory. (Maybe this should be optimized)
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WKWebView not loading local files under iOS 8
...athComponent;
... then start it up like so:
_webServer = [[GCDWebServer alloc] init];
[_webServer addGETHandlerForBasePath:@"/" directoryPath:docRoot indexFilename:@"index.html" cacheAge:3600 allowRangeRequests:YES];
[_webServer startWithPort:port bonjourName:nil];
To stop it:
[_webServer stop...
Facebook Graph API v2.0+ - /me/friends returns empty, or only friends who also use my application
..._friends endpoint in order to render a custom invite dialog, then pass the tokens returned by this API to the standard Requests Dialog.
In other cases, apps are no longer able to retrieve the full list of a user's friends (only those friends who have specifically authorized your app using the user...
Picking a random element from a set
...w array? docs.oracle.com/javase/7/docs/api/java/util/… "this method must allocate a new array even if this collection is backed by an array"
– anton1980
Nov 22 '14 at 3:19
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In STL maps, is it better to use map::insert than []?
...es") and are destroyed.
Which means extra time for:
1. One objects memory allocation
2. One extra constructor call
3. One extra destructor call
4. One objects memory deallocation
If your objects are large, constructors are typical, destructors do a lot of resource freeing, above points count even ...
File input 'accept' attribute - is it useful?
...
If specified, the attribute must consist of a
set of comma-separated tokens,
each of which must be an
ASCII case-insensitive
match for one of the following:
The string audio/*
Indicates that sound files are accepted.
The string video/*
Indicates that video fi...
Why is try {…} finally {…} good; try {…} catch{} bad?
...atement. If you are only using a 'try' in order to ensure resources are de-allocated in the 'finally' block, you might consider the 'using' statement instead:
using (StreamReader reader = new StreamReader('myfile.txt'))
{
// do stuff here
} // reader.dispose() is called automatically
You can ...
Practical uses of different data structures [closed]
...tworks of communication, data organization etc.
Heap - Dynamic memory allocation in lisp
This is the answer originally posted by RV Pradeep
Some other, less useful links:
Applications are only listed for some data structures
Not application focused, by good summary and relevant
...