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Spark java.lang.OutOfMemoryError: Java heap space
...s, you should have 2 - 4 per CPU. IME increasing the number of partitions is often the easiest way to make a program more stable (and often faster). For huge amounts of data you may need way more than 4 per CPU, I've had to use 8000 partitions in some cases!
Decrease the fraction of memory reserved...
How to clear APC cache entries?
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answered May 26 '09 at 15:14
Travis BealeTravis Beale...
Is it possible to set the stacking order of pseudo-elements below their parent element? [duplicate]
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edited Jan 21 '15 at 20:23
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What are the mechanics of short string optimization in libc++?
This answer gives a nice high-level overview of short string optimization (SSO). However, I would like to know in more detail how it works in practice, specifically in the libc++ implementation:
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Best documentation for Boost:asio?
The documentation available on the boost website is... limited.
9 Answers
9
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Where is Maven' settings.xml located on mac os?
Where is Maven' settings.xml located on mac os?
8 Answers
8
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How to get just one file from another branch
I am using git and working on master branch. This branch has a file called app.js .
10 Answers
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Find the last element of an array while using a foreach loop in PHP
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It sounds like you want something like this:
$numItems = count($arr);
$i = 0;
foreach($arr as $key=>$value) {
if(++$i === $numItems) {
echo "last index!";
}
}
That being said, you don't -have- to iterate over an "array" using foreach in php.
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How to extract numbers from a string in Python?
I would extract all the numbers contained in a string. Which is the better suited for the purpose, regular expressions or the isdigit() method?
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What's the point of map in Haskell, when there is fmap?
...rs of Haskell feel the need for a map function? Couldn't it just be what is currently known as fmap and fmap could be removed from the language?
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