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What are “named tuples” in Python?
...ctions, only fields with them. You can even use your named tuple types as base classes:
class Point(namedtuple('Point', 'x y')):
[...]
However, as with tuples, attributes in named tuples are immutable:
>>> Point = namedtuple('Point', 'x y')
>>> pt1 = Point(1.0, 5.0)
>&g...
Sticky and NON-Sticky sessions
...s routing request to that instance, instead chooses a new healthy instance based on the existing load balancing algorithm. The load balancer treats the session as now "stuck" to the new healthy instance, and continues routing requests to that instance even if the failed instance comes back.
...
What's the difference between returning void and returning a Task?
...Task<T> can represent any high-latency operation that produces a T.
Based on your comment above:
The await expression means "evaluate this expression to obtain an object representing work that will in future produce a result. Sign up the remainder of the current method as the call back assoc...
What is the bower (and npm) version syntax?
...
Based on semver, you can use
Hyphen Ranges X.Y.Z - A.B.C
1.2.3-2.3.4
Indicates >=1.2.3 <=2.3.4
X-Ranges
1.2.x
1.X
1.2.*
Tilde Ranges
~1.2.3
~1.2
Indicates allowing patch-level changes or minor version changes....
Optimal settings for exporting SVGs for the web from Illustrator?
... of it. It is only useful if your SVG is dynamic and the text might change based on user input.
Images: this only matters if you are including bitmap images
Embed: this is usually what you want, it encodes the image as a data uri so that you just upload one file instead of the svg file with it's...
How to decide when to use Node.js?
...e threads for each open connection.
This means you can create a browser-based chat application in Node.js that takes almost no system resources to serve a great many clients. Any time you want to do this sort of long-polling, Node.js is a great option.
It's worth mentioning that Ruby and Pytho...
Where is Python's sys.path initialized from?
...ts level best to figure out its actual physical
location on the filesystem based on what the operating system tells
it. If the OS just says "python" is running, it finds itself in $PATH.
It resolves any symbolic links. Once it has done this, the path of
the executable that it finds is used as the va...
How to append rows to an R data frame
...). The next-best solution is to use list, and the worst solution (at least based on these timing results) appears to be rbind.
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Efficiency of purely functional programming
... translated to an algorithm in the pure Lisp that runs in O(n log n) time (based on work by Ben-Amram and Galil [1992] about simulating random access memory using only pointers). Pippenger also establishes that there are algorithms for which that is the best you can do; there are problems which are ...
Why switch is faster than if
...tter than a long list of if-else statements as switch can perform a lookup based on all the values. However, for a short condition it won't be any faster and could be slower.
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