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Difference between std::result_of and decltype
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3
@RobertMason: Those arguments can be retrieved using std::declval, like the code I've shown above. Of course, this is ugly :)
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How to access pandas groupby dataframe by key
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In [21]: gb.get_group('foo')
Out[21]:
A B C
0 foo 1.624345 5
2 foo -0.528172 11
4 foo 0.865408 14
Note: This doesn't require creating an intermediary dictionary / copy of every subdataframe for every group, so will be much more memory-efficient that creating the naive di...
How to conclude your merge of a file?
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answered Jan 21 '10 at 21:30
MBOMBO
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Are multiple `.gitignore`s frowned on?
...y)
– Jakub Narębski
Sep 14 '14 at 13:22
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Python “extend” for a dictionary
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phoenix
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answered Feb 23 '09 at 11:01
Nick FortescueNic...
How to configure robots.txt to allow everything?
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answered Nov 25 '10 at 12:23
JimJim
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What is the recommended batch size for SqlBulkCopy?
...ut 6M qualified rows, averaging 5 columns of decimal and short text, about 30 bytes per row.
Given this scenario, I found a batch size of 5,000 to be the best compromise of speed and memory consumption. I started with 500 and experimented with larger. I found 5000 to be 2.5x faster, on average, th...
What happens if you static_cast invalid value to enum class?
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131
What is color set to according to the standard?
Answering with a quote from the C++11 and ...
How do I install a plugin for vim?
... ln File.join(plugin_dir, f), File.join(vim_dir,f)
end
boldred = "\033[1;31m"
clear = "\033[0m"
puts "\nDone. Remember to #{boldred}:helptags ~/.vim/doc#{clear}"
end
task :uninstall do
vim_dir = File.expand_path("~/.vim")
plugin_dir = Dir.pwd
Dir["**/*.{txt,snippet,snippets,...
Microsecond timing in JavaScript
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134
As alluded to in Mark Rejhon's answer, there is an API available in modern browsers that expose...