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How to efficiently count the number of keys/properties of an object in JavaScript?
...ll(obj, k))?
– styfle
May 14 '12 at 21:04
15
@styfle If you use a for loop to iterate over the ob...
What is the instanceof operator in JavaScript?
...
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
answered Mar 15 '10 at 17:52
JonHJonH
...
JavaScript OOP in NodeJS: how?
...5.7307 4.9328 45.2525 4.66231 44.6595 4.66231C43.6264 4.66231 43.1481 5.28821 43.1481 6.59048V11.9512C43.1481 13.2535 43.6264 13.8962 44.6595 13.8962C45.6924 13.8962 46.1709 13.2535 46.1709 11.9512V9.17788Z\"/\u003e\u003cpath d=\"M32.492 10.1419C32.492 12.6954 34.1182 14.0484 37.0451 14.0484C39.9723...
How to replace a hash key with another key
...C, love it!
– nicohvi
Jun 15 '14 at 21:41
10
I often don't like "smart" ruby code because it take...
Expand a random range from 1–5 to 1–7
...as a complete range (1...25). If it did, subtracting 4 would make it (-3...21), but in this case it becomes (1, 6, 11, 16, 21), so the end points are correct but there are four big holes: (2..5), (7..10), (12..15), (17..21). Finally you do mod 7 and add 1, giving (2, 7, 5, 3, 1). So neither 4 nor 6 ...
Some built-in to pad a list in python
... oyvind
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answered Aug 9 '10 at 9:43
John La RooyJohn La Rooy
249k464...
Why are unnamed namespaces used and what are their benefits?
... Johannes Schaub - litbJohannes Schaub - litb
453k112112 gold badges830830 silver badges11501150 bronze badges
...
What are “named tuples” in Python?
...e following:
pt1 = (1.0, 5.0)
pt2 = (2.5, 1.5)
from math import sqrt
line_length = sqrt((pt1[0]-pt2[0])**2 + (pt1[1]-pt2[1])**2)
Using a named tuple it becomes more readable:
from collections import namedtuple
Point = namedtuple('Point', 'x y')
pt1 = Point(1.0, 5.0)
pt2 = Point(2.5, 1.5)
from ...
How can I quickly sum all numbers in a file?
...END { print $sum' random_numbers
16379866392
real 0m0.226s
user 0m0.219s
sys 0m0.002s
$ time awk '{ sum += $1 } END { print sum }' random_numbers
16379866392
real 0m0.311s
user 0m0.304s
sys 0m0.005s
$ time { { tr "\n" + < random_numbers ; echo 0; } | bc; }
16379866392
rea...
How can I swap positions of two open files (in splits) in vim?
...
nelstromnelstrom
16.5k1212 gold badges5050 silver badges6363 bronze badges
...