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Fastest way to replace NAs in a large data.table
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system.time(a_gdata = f_gdata(dt1))
user system elapsed
18.805 12.301 134.985
system.time(a_andrie = f_andrie(dt1))
Error: cannot allocate vector of size 305.2 Mb
Timing stopped at: 14.541 7.764 68.285
system.time(f_dowle(dt1))
user system elapsed
7.452 4.144 19.590 # EDIT h...
Easiest way to check for an index or a key in an array?
... "Correct usage: exists {key} in {array}"
return
fi
eval '[ ${'$3'[$1]+muahaha} ]'
}
For example
if ! exists key in array; then echo "No such array element"; fi
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Problems with lib-icu dependency when installing Symfony 2.3.x via Composer
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Intl::getIcuDataVersion();
attention: not needed anymore ( symfony 2.3 has meanwhile been released )
add the minimum stability flag @dev or @rc to your dependency like this please:
composer create-project symfony/framework-standard-edition mynewerproject/ 2.3.*@dev
The default stability i...
Managing relationships in Laravel, adhering to the repository pattern
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answered Sep 16 '13 at 13:30
fideloperfideloper
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Sorting an array of objects by property values
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30 Answers
30
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How can I find out the total physical memory (RAM) of my linux box suitable to be parsed by a shell
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13 Answers
13
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How do I parse an ISO 8601-formatted date?
I need to parse RFC 3339 strings like "2008-09-03T20:56:35.450686Z" into Python's datetime type.
27 Answers
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How to change to an older version of Node.js
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493
One way is to use NVM, the Node Version Manager.
Use following command to get nvm
curl -o- htt...
Check if a dialog is displayed with Espresso
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denysdenys
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Portable way to get file size (in bytes) in shell?
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answered Nov 29 '09 at 13:45
Carl SmotriczCarl Smotricz
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