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Aggregate / summarize multiple variables per group (e.g. sum, mean)
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45
Where is this year() function from?
You could also use the reshape2 package for this task:
req...
Upload files with HTTPWebrequest (multipart/form-data)
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253
Took the code above and fixed because it throws Internal Server Error 500. There are some probl...
Problems with lib-icu dependency when installing Symfony 2.3.x via Composer
...xtension, that's where the icu error comes from!
sudo aptitude install php5-intl // i.e. ubuntu
brew install icu4c // osx
check the extension is enabled and properly configured in php.ini aswell.
( hint: php-cli sometimes uses a different php.ini )
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Approximate cost to access various caches and main memory?
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5 Answers
5
Active
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Apply multiple functions to multiple groupby columns
... [0, 0, 1, 1]
df
a b c d group
0 0.418500 0.030955 0.874869 0.145641 0
1 0.446069 0.901153 0.095052 0.487040 0
2 0.843026 0.936169 0.926090 0.041722 1
3 0.635846 0.439175 0.828787 0.714123 1
A dictionary mapped from column nam...
How to get current time in milliseconds in PHP?
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521
The short answer is:
$milliseconds = round(microtime(true) * 1000);
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How to properly compare two Integers in Java?
...n(x == y);
This will print true, due to the rules of boxing (JLS section 5.1.7). It's still reference equality being used, but the references genuinely are equal.
If the value p being boxed is an integer literal of type int between
-128 and 127 inclusive (§3.10.1), or the boolean literal tr...
UICollectionView Set number of columns
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edited Feb 3 '13 at 17:52
answered Feb 3 '13 at 17:38
jh...
Find object in list that has attribute equal to some value (that meets any condition)
...me, not x.field
– Stewart Dale
Jul 15 '15 at 18:46
3
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pandas: How do I split text in a column into multiple rows?
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+50
This splits the Seatblocks by space and gives each its own row.
In [43]: df
Out[43]:
CustNum CustomerName ItemQty Item ...