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What is the !! (not not) operator in JavaScript?
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127
It converts a nonboolean to an inverted boolean (for instance, !5 would be false, since 5 is a non-false value in JS), then boolean-inverts...
Why does Java have transient fields?
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27
This example is taken from this code, you can read it here:javabeat.net/2009/02/what-is-transient-keyword-in-java
– K...
How to prevent ifelse() from turning Date objects into numeric objects
...there is an NA_double_
– roarkz
Jun 27 '17 at 13:28
11
@Zak One possibility is to wrap NA in as.D...
_DEBUG vs NDEBUG
...u003cpath fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M25.6622 17.6335C27.8049 17.6335 29.3739 16.9402 30.2537 15.6379C30.8468 14.7755 30.9615 13.5579 30.9615 11.9512V6.59049C30.9615 5.28821 30.4833 4.66231 29.4502 4.66231C28.9913 4.66231 28.4555 4.94978 28.1109 5.50789C27.499 4.86533 26.7335 4....
How to make a class property? [duplicate]
..., and added tests for anyone that wants to use it: gist.github.com/Skinner927/413c0e9cc8433123f426832f9fe8d931
– Skinner927
Jul 25 '19 at 22:53
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How to make vim paste from (and copy to) system's clipboard?
... ConnerConner
26.3k88 gold badges4747 silver badges7272 bronze badges
111
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AtomicInteger lazySet vs. set
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Cited straight from "JDK-6275329: Add lazySet methods to atomic classes":
As probably the last little JSR166 follow-up for Mustang,
we added a "lazySet" method to the Atomic classes
(AtomicInteger, AtomicReference, etc). This is a niche
meth...
How to round the minute of a datetime object
...pdate 2019-03-09 = comment Spinxz incorporated; thank you.
update 2019-12-27 = comment Bart incorporated; thank you.
Tested for date_delta of "X hours" or "X minutes" or "X seconds".
import datetime
def round_time(dt=None, date_delta=datetime.timedelta(minutes=1), to='average'):
"""
Roun...
Standard concise way to copy a file in Java?
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274
As toolkit mentions above, Apache Commons IO is the way to go, specifically FileUtils.copyFile...
A Java collection of value pairs? (tuples?)
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Dave Jarvis
27.6k3434 gold badges157157 silver badges281281 bronze badges
answered Feb 6 '09 at 17:24
Paul Brinkl...