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When should one use a 'www' subdomain?
...in cookies a la *.example.com. There are two pertinent impacts.
First it means that any user you're giving cookies to will send those cookies back with requests that match the domain. So even if you have a subdomain, images.example.com, the example.com cookie will always be sent with requests to t...
Is returning by rvalue reference more efficient?
...mporary into ab, or do RVO to omit doing a move or copy altogether. I recommend you to read BoostCon09 Rvalue References 101 which explains the matter, and how (N)RVO happens to interact with this.
Your case of returning an rvalue reference would be a good idea in other occasions. Imagine you hav...
Converting dict to OrderedDict
I am having some trouble using the collections.OrderedDict class. I am using Python 2.7 on Raspbian, the Debian distro for Raspberry Pi. I am trying to print two dictionaries in order for comparison (side-by-side) for a text-adventure. The order is essential to compare accurately.
No matter what I...
Are there any SHA-256 javascript implementations that are generally considered trustworthy?
...ng it on to the server. I'm having trouble figuring out which SHA-256 implementation I can actually trust. I was expecting there to be some kind of authoritative script that everyone used, but I'm finding loads of different projects all with their own implementations.
...
C# List of objects, how do I get the sum of a property
...ving a single property of datatype double, summing up the property 1,000 times using solution above (myList.Sum) takes 2.44 seconds compared to 0.98 seconds using foreach. The elapsed time is measured using the Stopwatch class for accuracy. Therefore foreach is over 2x faster than using myList.Sum.
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Catching all javascript unhandled exceptions
...ient side, without using any server side code. I'm using MVC3 as an environment.
4 Answers
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What does a tilde do when it precedes an expression?
...0000 0000 0001
If it were a negative number, it'd be stored in 2's complement: invert all bits and add 1.
...and then flips all its bits...
1111 1111 1111 1111 1111 1111 1111 1110
So what is the use of it, then? When might one ever use it?
It has a quite a few uses. If you're writing low ...
Input size vs width
...will fall back to the specified number of characters.
Edit: I should have mentioned that the size attribute isn't a precise method of sizing: according to the HTML specification, it should refer to the number of characters of the current font the input will be able to display at once.
However, un...
OSGi: What are the differences between Apache Felix and Apache Karaf?
...f with more feature rich OSGi containers, not with Felix.
To quote Guillaume Nodet (Karaf's author) from here:
Felix is just the OSGi core runtime. Karaf provides a "distribution" based on Felix by adding other features such as a console, an SSH remoting mechanism, a file deployer and more.
I...
Python Process Pool non-daemonic?
...ltiprocessing.pool.Pool class creates the worker processes in its __init__ method, makes them daemonic and starts them, and it is not possible to re-set their daemon attribute to False before they are started (and afterwards it's not allowed anymore). But you can create your own sub-class of multipr...