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Extract elements of list at odd positions
...llowing positions (0-based, so first element is at position 0, second at 1 etc.):
1, 3, 5
so the result (actual numbers) will be:
2, 4, 6
Explanation
The [1::2] at the end is just a notation for list slicing. Usually it is in the following form:
some_list[start:stop:step]
If we omitted sta...
Determine project root from a running node.js application
...y on a global variable, which means that you can't easily reuse components/etc.
process.cwd()
This returns the current working directory. Not reliable at all, as it's entirely dependent on what directory the process was launched from:
$ cd /home/demo/
$ mkdir subdir
$ echo "console.log(process.c...
How to bring back “Browser mode” in IE11?
...imply not a good enough substitute for testing in real copies of IE8, IE9, etc.
The IE devs have recognised this and are deliberately making it harder for devs to make this mistake.
The best practice is to use real copies of each IE version to test your site instead.
The various compatiblity mode...
How to know if user is logged in with passport.js?
...express.js and passport.js you will deal with requests (app.get, app.post, etc), so talking about using passport.js outside of it is little bit pointless. Yes it is only within express route middleware handlers like app.get, app.post etc. If you need different functionality, then you should explain ...
Does Java SE 8 have Pairs or Tuples?
...the elements:
(a, b)
(first, second)
(left, right)
(car, cdr)
(foo, bar)
etc.
One big issue that has hardly been mentioned is the relationship of Pairs to primitives. If you have an (int x, int y) datum that represents a point in 2D space, representing this as Pair<Integer, Integer> consum...
How do I install Python OpenCV through Conda?
...ped with tons of useful packages, such as NumPy, Pandas, IPython Notebook, etc. It seems to be recommended everywhere in the scientific community. Check out Anaconda to get it installed.
Install OpenCV-Python to Anaconda
Cautious Note: I originally tried out installing the binstar.org OpenCV packa...
Cross-browser custom styling for file upload button [duplicate]
...ould still work just fine, so could you send me a link of a jsfiddle/jsbin/etc of the code that doesn't work in IE8?
– Joeytje50
Nov 30 '14 at 19:11
...
What does multicore assembly language look like?
...ng "load the EDX register with the value 5", "increment the EDX" register, etc.
10 Answers
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Why is arr = [] faster than arr = new Array?
...ntext which may contain the "arguments" object, locally defined variables, etc. If we cannot find it in the Activation object, we begin looking up the scope chain until we reach the global scope. If nothing is found, we throw a ReferenceError.
Once we've located the variable declaration, we invoke...
scala vs java, performance and memory? [closed]
...asier to express more generic patterns as types (such as Monads, Functors, etc.). This allows you to create types that don't get in your way due to overly strict contracts, as often happens in Java. Strict contracts not based on actual patterns in the code are the reason Inversion of Responsibilit...