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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
...don't know if this is most effective, but perhaps the shortest
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(function(x) { return B.indexOf(x) < 0 })
console.log(diff);
Updated to ES6:
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(x => !B.includes(x) );
console.log(diff);
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Install dependencies globally and locally using package.json
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answered May 30 '12 at 9:05
Jason LivesayJason Livesay
5,98233 gold badges2121 silver badges3030 bronze badges
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How do I detect if Python is running as a 64-bit application? [duplicate]
...k with the windows registry. Depending on whether you're running python as 32-bit or 64-bit, the key value will be different. How do I detect if Python is running as a 64-bit application as opposed to a 32-bit application?
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Determine the process pid listening on a certain port
..., the line that does the job is:
sockstat -4 -l | grep :80 | awk '{print $3}' | head -1
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How to check whether a variable is a class or not?
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348
Even better: use the inspect.isclass function.
>>> import inspect
>>> class...
How to get just the responsive grid from Bootstrap 3?
...ttp://getbootstrap.com/customize/ and toggle just what you want from the BS3 framework and then click "Compile and Download" and you'll get the CSS and JS that you chose.
Open up the CSS and remove all but the grid. They include some normalize stuff too. And you'll need to adjust all the styles o...
Compare two List objects for equality, ignoring order [duplicate]
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313
If you want them to be really equal (i.e. the same items and the same number of each item), I ...
What is the HEAD in git?
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edited Nov 30 '16 at 12:30
Maroun
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Any way to modify Jasmine spies based on arguments?
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3 Answers
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