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Creating range in JavaScript - strange syntax
...0); //true
arr[0]; //'a'
Object.keys(arr); //['0', '1', '2']
arr.length; //3, implies arr[3] === undefined
//we expand the array by 1 item
arr.length = 4;
arr[3]; //undefined
arr.hasOwnProperty(3); //false
Object.keys(arr); //['0', '1', '2']
We get to the inherent difference between the number of...
What are “res” and “req” parameters in Express functions?
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3 Answers
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Pandas every nth row
... edited Oct 25 '18 at 5:05
user3483203
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answered Jul 31 '14 at 11:25
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How do you write tests for the argparse portion of a python module? [closed]
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edited Jul 31 '15 at 21:18
Daniel Andersson
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What exactly does the enable-background attribute do?
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3
I wasn't too shocked when this was no on caniuse.com. However it was shocking that the w3.org examples didn't work on chrome/mac. Go IE 10+ ...
Find substring in the string in TWIG
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348
Just searched for the docs, and found this:
Containment Operator:
The in operator performs co...
Explicitly select items from a list or tuple
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list( myBigList[i] for i in [87, 342, 217, 998, 500] )
I compared the answers with python 2.5.2:
19.7 usec: [ myBigList[i] for i in [87, 342, 217, 998, 500] ]
20.6 usec: map(myBigList.__getitem__, (87, 342, 217, 998, 500))
22.7 usec: itemgetter(87, 342...
Should I use multiplication or division?
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Python:
time python -c 'for i in xrange(int(1e8)): t=12341234234.234 / 2.0'
real 0m26.676s
user 0m25.154s
sys 0m0.076s
time python -c 'for i in xrange(int(1e8)): t=12341234234.234 * 0.5'
real 0m17.932s
user 0m16.481s
sys 0m0.048s
multiplication is 33% faste...
Rebasing a Git merge commit
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135
There are two options here.
One is to do an interactive rebase and edit the merge commit, redo ...