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Is JavaScript guaranteed to be single-threaded?
...etInterval, HTTP-request onload events (XHR), and UI events (click, focus, etc.) provide a crude impression of multi-threadedness - they are still all executed along a single timeline - one at a time - so even if we don't know their execution order beforehand, there's no need to worry about external...
Should I return a Collection or a Stream?
... if the caller filters the stream to return only lines matching a pattern, etc.
An idiom that seems to be emerging is to name stream-returning methods after the plural of the name of the things that it represents or contains, without a get prefix. Also, while stream() is a reasonable name for a str...
Understanding checked vs unchecked exceptions in Java
... I dont have any code for that stuff, I just cooked up the names etc. If you see java.lang.Exception, it has 4 constructors two of them accept java.lang.Throwable. In snippets above I assumed LoginFailureException extends Exception and declares a constructor public LoginFailureException(Th...
What is the difference between shallow copy, deepcopy and normal assignment operation?
...
In python, when we assign objects like list, tuples, dict, etc to another object usually with a ' = ' sign, python creates copy’s by reference. That is, let’s say we have a list of list like this :
list1 = [ [ 'a' , 'b' , 'c' ] , [ 'd' , 'e' , 'f' ] ]
and we assign another li...
How to remove/ignore :hover css style on touch devices
...gs have identifying information about browser, renderer, operating system, etc. It would be up to you to decide what devices are "touch" versus non-touch. You may be able to find this information available somewhere and map it into your system.
A. If you're allowed to ignore old browsers, you just ...
C++11 rvalues and move semantics confusion (return statement)
...move overloads for nearly anything (hash key and values, vector insertion, etc), and is where you will see them the most.
You can also use them to normal functions, and if you only provide an rvalue reference argument you can force the caller to create the object and let the function do the move. ...
How to implement Rate It feature in Android App
...miss();
}
});
ll.addView(b3);
dialog.setContentView(ll);
dialog.show();
}
}
Integrating the class is as simple as adding:
AppRater.app_launched(this);
To your Activity. It only needs to be added to one Activity in the entire app.
...
How to write the Fibonacci Sequence?
...ers of the
sequence itself, yielding the sequence
0, 1, 1, 2, 3, 5, 8, etc.
If your language supports iterators you may do something like:
def F():
a,b = 0,1
while True:
yield a
a, b = b, a + b
Display startNumber to endNumber only from Fib sequence.
Once you know h...
Error message “Forbidden You don't have permission to access / on this server” [closed]
... line 127.0.0.1 web_site_name.com to the bottom of the file /private/etc/hosts worked for me. If you have Apache setup to listen on, say, port 8080, then use <VirtualHost *:8080>, and just as you have to use the url http://localhost:8080, you will need to use the url http://web_site_na...
Regular expression for floating point numbers
...ns", as implemented in most modern languages, APIs, frameworks, libraries, etc., are based on a concept developed in formal language theory. However, software engineers have added many extensions that take these implementations far beyond the formal definition. So, while most regular expression engi...