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Compare double to zero using epsilon
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Assuming 64-bit IEEE double, there is a 52-bit mantissa and 11-bit exponent. Let's break it to bits:
1.0000 00000000 00000000 00000000 00000000 00000000 00000000 × 2^0 = 1
The smallest representable number greater than 1:
1.0000 00000000 00000000 00000000 00000...
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Clojure 1.2.1/1.3/1.4 'proxy generated in Grails 2.0.0 runtime fails. 1.2.0 is fine
I'm working on extending the Grails Clojure plugin in Grails 2.0.0 (and 2.1.0-SNAPSHOT) and I wanted to update it to Clojure 1.3.0 and add clojure.tools.logging .
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Detect Retina Display
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295
In order to detect the Retina display reliably on all iOS devices, you need to check if the de...
What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
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962
There is a difference, but there is no difference in that example.
Using the more verbose metho...
Determine the data types of a data frame's columns
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220
Your best bet to start is to use ?str(). To explore some examples, let's make some data:
s...
Get top n records for each group of grouped results
... select *
from mytable
where `group` = 1
order by age desc
LIMIT 2
)
UNION ALL
(
select *
from mytable
where `group` = 2
order by age desc
LIMIT 2
)
There are a variety of ways to do this, see this article to determine the best route for your situation:
http://www.xaprb.com/b...
How exactly does tail recursion work?
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answered Mar 20 '13 at 9:11
Alexey FrunzeAlexey Frunze
56.8k99 gold badges6767 silver badges154154 bronze badges
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How to delete duplicate rows in SQL Server?
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23 Answers
23
Active
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What is the Difference Between read() and recv() , and Between send() and write()?
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edited Jul 25 '19 at 9:07
smbear
92299 silver badges1515 bronze badges
answered Nov 24 '0...