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How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
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matt---
2,42022 gold badges1616 silver badges1919 bronze badges
answered Jun 4 '14 at 18:42
ConnorConnor
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What is NODE_ENV and how to use it in Express?
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4 Answers
4
Active
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List comprehension: Returning two (or more) items for each item
...gt; list(chain.from_iterable((f(x), g(x)) for x in range(3)))
[2, 0, 3, 1, 4, 4]
Timings:
from timeit import timeit
f = lambda x: x + 2
g = lambda x: x ** 2
def fg(x):
yield f(x)
yield g(x)
print timeit(stmt='list(chain.from_iterable((f(x), g(x)) for x in range(3)))',
setu...
Bash variable scope
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edited Aug 28 '19 at 22:43
Community♦
111 silver badge
answered Sep 23 '08 at 22:29
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In MySQL queries, why use join instead of where?
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edited Apr 19 '19 at 4:50
Ramzis
10777 bronze badges
answered Feb 11 '10 at 3:14
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What is the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews?
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104
I'm still trying to figure this out myself, so take this with some skepticism and forgive me if ...
How to get overall CPU usage (e.g. 57%) on Linux [closed]
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Take a look at cat /proc/stat
grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage "%"}'
EDIT please read comments before copy-paste this or using this for any serious work. This was not tested nor used, it's an idea for people who do not want to install a utility or fo...
passport.js RESTful auth
... and password do not match an error is sent to the client in the form of a 401 HTTP error code.
Instead of forcing clients to send username and password with every request you can have a "get_access_token" function in your RESTful service that takes the username and password and responds with a toke...
Fastest way to list all primes below N
... | ms |
+---------------------+-------+
| rwh_primes1 | 43.0 |
| sieveOfAtkin | 46.4 |
| rwh_primes | 57.4 |
| sieve_wheel_30 | 63.0 |
| rwh_primes2 | 67.8 |
| sieveOfEratosthenes | 147.0 |
| ambi_sieve_plain | 152.0 |
| sundaram3 ...
Performance of static methods vs instance methods
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edited Aug 28 '18 at 13:24
Corstian Boerman
8181212 silver badges2828 bronze badges
answered Sep 5 '12 ...