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Why is creating a Thread said to be expensive?
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Java thread creation is expensive because there is a fair bit of work involved:
A large block ...
parseInt(null, 24) === 23… wait, what?
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240
It's converting null to the string "null" and trying to convert it. For radixes 0 through 23, th...
How to combine multiple conditions to subset a data-frame using “OR”?
... it is to be handled as I intended, since ...
> NA & 1
[1] NA
> 0 & NA
[1] FALSE
Order of arguments may matter when using '&".
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How to escape JSON string?
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David Walschots
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answered Jun 15 '16 at 19:04
xmedekoxmedeko
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How does the Java 'for each' loop work?
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Sotirios Delimanolis
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answered Sep 17 '08 at 16:46
nsayernsayer
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Replace Default Null Values Returned From Left Outer Join
I have a Microsoft SQL Server 2008 query that returns data from three tables using a left outer join. Many times, there is no data in the second and third tables and so I get a null which I think is the default for left outer join. Is there a way to replace the default values in the select stateme...
Preventing scroll bars from being hidden for MacOS trackpad users in WebKit/Blink
WebKit/Blink's (Safari/Chrome) default behaviour on MacOS since 10.7 (Mac OS X Lion) is to hide scroll bars from trackpad users when they're not in use. This can be confusing ; the scroll bar is often the only visual cue that an element is scrollable.
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Best way to check if a Data Table has a null value in it
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edited Apr 10 '14 at 15:05
answered Jan 5 '11 at 13:21
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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% faster
Lua:
time lua ...
How do I download a tarball from GitHub using cURL?
...on to follow redirects:
curl -L https://github.com/pinard/Pymacs/tarball/v0.24-beta2 | tar zx
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