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HTTP headers in Websockets client API
...mes extended to be used in websocket specific authentication) is generated from the optional second argument to the WebSocket constructor:
var ws = new WebSocket("ws://example.com/path", "protocol");
var ws = new WebSocket("ws://example.com/path", ["protocol1", "protocol2"]);
The above results in...
What is memory fragmentation?
...e memory back to the OS (because each of the large blocks it has allocated from the OS, for malloc etc. to sub-divide, has something left in it, even though most of each block is now unused).
Tactics to prevent memory fragmentation in C++ work by allocating objects from different areas according to ...
What is a monad?
...nctions at the top level.
But how does the language prevent pure functions from executing impure functions? This is due to the lazy nature of Haskell. A function is only executed if its output is consumed by some other function. But there is no way to consume an IO value except to assign it to main....
How to empty a list?
...
This actually removes the contents from the list, but doesn't replace the old label with a new empty list:
del lst[:]
Here's an example:
lst1 = [1, 2, 3]
lst2 = lst1
del lst1[:]
print(lst2)
For the sake of completeness, the slice assignment has the same ...
Underscore prefix for property and method names in JavaScript
...yntax tries to be both terse and intuitive, although it's rather different from other programming languages.
Why was the sigil # chosen, among all the Unicode code points?
@ was the initial favorite, but it was taken by decorators. TC39 considered swapping decorators and private state ...
Changing Locale within the app itself
...
Is you preference activity being called from you main activity? you could place this in the on resume... @Override protected void onResume() { if (!(PreferenceManager.getDefaultSharedPreferences( getApplicationContext()).getString("listLanguage", "en") .equ...
What to use instead of “addPreferencesFromResource” in a PreferenceActivity?
I just noticed the fact that the method addPreferencesFromResource(int preferencesResId) is marked deprecated in Android's documentation ( Reference Entry ).
...
What do we mean by Byte array? [closed]
...tc..
Just as bytes can encode different types and ranges of data (numbers from 0 to 255, numbers from -128 to 127, single characters using ASCII e.g. 'a' or '%', CPU op-codes), each byte in a byte array may be any of these things, or contribute to some multi-byte values such as numbers with larger ...
is there an easy way to get the http status code in the failure block from AFHTTPClient?
...
In newer versions of AFNetworking, you can retrieve the response object from the error:
[[[error userInfo] objectForKey:AFNetworkingOperationFailingURLResponseErrorKey] statusCode]
This is handy if you're doing error handling further up the line and don't want to pass around the response objec...
Use of #pragma in C
...ation specific .say a situation where you want the program counter to read from the specific address where the ISR is written then you can specify ISR at that location using #pragma vector=ADC12_VECTOR and followd by interrupt rotines name and its description
...